Loading...
Welcome to Metal Mine! Today is Share:

Table of Content

    15 September 2009, Volume 39 Issue 09
    Previous Issue    Next Issue
    2008 Annual Review of Mineral Processing in China
    WEI De-Zhou, GAO Shu-Ling, LIU Wen-Gang, WANG Ming-Qiang
    2009, 39(09):  1. 
    Asbtract ( 1404 )  
    Related Articles | Metrics
    With the domestic advances in research and practice of mineral processing in 2008 reviewed,abundant research work were carried out in aspects of ore preparing,nonferrous metals beneficiation,ferrous metals beneficiation,nonmetals beneficiation,application of biotechnology in mineral processing,beneficiation reagent,dressing equipments,tailings disposal,environmental protection and so on.The emphasis is focused on improving separation indexes,especially on the beneficiation of cupriferous,lead-zinc ferrous ores,quality improvement and impurity decrease of ferrous ores.In additional,the research on microorganism beneficiation and tailings utilization becomes deeper; while the study on the basic theory and new equipment of mineral processing is somewhat unsubstantial,which needs to strengthen further.
    Review of the Development of China's Reverse Flotation Technology for Iron Ore
    SONG Ren-Feng, LI Wei-Bing, LIU Hua-Yan, XUE Min
    2009, 39(09):  2. 
    Asbtract ( 1684 )  
    Related Articles | Metrics
    The paper elaborates the role and development of flotation technology,analyzes the classification,characteristics and mechanism of reverse flotation,presents the research progress,application and characteristics of reverse flotation technology in China and proposes the research aspects of reverse flotation needing to be enhanced.
    Study on the Mechanical Properties and Anchoring Mechanism in  Anchored Structure of Underground Cavity
    LI Xin-Ping, DAI Yi-Fei, GUO Yun-Hua, XU Jian
    2009, 39(09):  19-23+28. 
    Asbtract ( 1702 )  
    Related Articles | Metrics
    Rock mass,rock bolts and cement mortar are regarded as the composite reinforced material of anchored rock mass.A layered model of anchoring composite material is established according to the principle of strain energy equivalent and mechanical properties of anchoring rock mass are studied quantitatively.Based on above analysis,the space between rock bolts arranged in sector will increase with the anchoring depth growing,and the equivalent mechanical properties of the reinforced rock mass will vary when the space between rock bolts changes.Functions of equivalent mechanical parameters related to the rock bolts anchoring depth of the underground cavity anchoring composite material are deduced and deformation stability is analyzed with the finite element methods to verify the theoretical analysis.So the anchoring mechanism of the rock bolts arranged in sector in the underground cavity will be realized more clearly.
    Study on the Reinforcement Mechanism of Fully Grouted Rock Bolt Considering the Interaction between Bolt and Wallrock Mass
    ZHU Xun-Guo
    2009, 39(09):  24-28. 
    Asbtract ( 1886 )  
    Related Articles | Metrics
    The shear stress distribution function of grouted rock bolt is set up based on the interface between bolt and wallrock mass and following the Coulomb-Mohr yield criterion.On this basis,the distribution functions of the shear stress and axial load of the grouted rock bolt in wallrock under the actual stress are set up based on the mechanism of interaction between wallrock mass and grouted rock bolt.Meanwhile,a computing formula of neutral point is set up according to the concept of neutral point.The effects of various factors on the actual stress of bolt are analyzed in detail,providing a certain theoretical basis for analyzing its reinforcement mechanism.
    SEM-Based Investigation on the Quantification of Meso-Damage of Marble under Uniaxial Compression
    NI Xiao-Hui, ZHU Zhen-De, WU Yi-Quan
    2009, 39(09):  29-32+88. 
    Asbtract ( 1808 )  
    Related Articles | Metrics
    A whole process digital tracking test scheme of marble meso-damage based on scanning electron microscopy（SEM) is designed for the uniaxial compression of a marble sample from Jinping,Sichuan.Based on the digital image processing technology,a quantitative analysis for the whole process of microfracture from initiation,growth to breakthrough is made,and the basic geometrical data such as area,azimuth angle and length of the sample in load-bearing process are extracted.Statistic analysis is made on the whole process meso-damage information of the micro-fractures of 32 samples by statistics theory.It is concluded that the azimuth angle,length and space of marble sample micro-fractures in the uniaxial compression process obey the regularity of generalized extreme value distribution of variable parameters.
    Study on Ore Characters and Drilling Ability of Anqian Iron Mine
    QIU Jing-Ping, XING Jun, SUN Xiao-Gang, SUN Hou-Guang, LI Chun-Yang
    2009, 39(09):  33-37. 
    Asbtract ( 1519 )  
    Related Articles | Metrics
    This paper has analyzed and studied their rock mechanics parameter,mineral composition,grain sizes and microscopic structure of the ore for both Anqian mine and Qidashan iron mine,detected the influence of ore characters of microscopic composition,structure feature,mineral component to drilling ability,know the intrinsic influencing factor of drilling ability,disclosure the ultimate reasons for drilling difficulties and low service life of drill bit at Anqian mine.This paper has graded drilling ability and forecasted the bit life length of the ore for both Anqian mine and Qidashan iron mine,which provided the scientific base of material consumption rate and base data for optimizing bit matching with ore character and drilling rig working parameters that have guiding meaning for Anqian mine.
    A Primary Discussion on the Thickening Law of Paste-filling
    LIU Xiao-Hui, WU Ai-Xiang, WANG Hong-Jiang, YAN Qing-Wen, RONG Yi
    2009, 39(09):  38-41. 
    Asbtract ( 1761 )  
    Related Articles | Metrics
    Deep-cone thickener as a high-effective thickening equipment was developed in 1970s,which owns a great production capacity and can get a higher underflow density.It provides guarantee for the preparation of paste filling materials.In this paper,the structure and operating principle of a deep-cone thickener are described.The thickening processes are divided into: clarification area,sedimentation area,critical concentration area,and compression area by on-field observation.The laws of concentration changing and the major influencing factors by experiments are studied respectively.The results indicate that the sedimentation of tailings has three steps and the 76%~82% change range of underflow density in normal operating was obtained,providing a theoretical basis for prediction and control of system fault.
    Multi-Expert Determination of the Subjective Weight Based on Set Valued Iteration
    LI De-Shun, XU Kai-Li, LI Chun-Chen
    2009, 39(09):  42-43+50. 
    Asbtract ( 1550 )  
    Related Articles | Metrics
    A comprehensive assessment of system often requires several indicator systems,which are given weights to reflect their respective distribution.The defects of hierarchy analysis method are pointed out.The multi-experts' information iteration is made and the comparative value of two indicators in interval form is given,which is in more conformity with people's thinking way and reduces the process of consistency check.The real application cases show that this method can reduce the times of indicator comparison and rationally reflect the weight of assessment indicators,thus providing a new approach to determining the index subjective weight in system comprehensive assessment.
    Stability Numerical Analysis of Artificial Roof Filling Body
    XIE Sheng-Qing, WANG Xin-Min, SHI Liang-Gui, ZHAO Bin, ZHANG Qin-Li
    2009, 39(09):  44-47. 
    Asbtract ( 1996 )  
    Related Articles | Metrics
    There are lots of crushed ore rocks and unstable filling body in north of Jiaojia gold mine. The numerical simulation and analysis on different ways of stope structure and artificial false top bearing layer thickness and bearing layer were done under the condition of adjacent filling the stress, strain and plastic deformation status, etc. According to this analysis, over stress for 12 kinds of model bearing bed possibly causes damage；Meanwhile, almost all adjacent filling bodies have been damaged with poor mining security. Therefore, the building process of artificial roof should be optimized; the bearing layer should be strengthened; and the security in mining should be also improved.
    Study on the Functional Mechanism and Application of Diaphragm Wall with Pre-stressed Vertical Bolts
    XU Wen-Jie, WANG Yun-Yong, ZHAO Fu-Ping
    2009, 39(09):  48-50. 
    Asbtract ( 1869 )  
    Related Articles | Metrics
    The concept of “diaphragm wall with pre-stressed vertical bolts” is put forward in this paper,and its functional mechanism is analyzed.According to a practical project,the slope stabilities before and after construction of the wall are analyzed contrastively by analysis of geo-technology software.The results show that slip coefficient is increased markedly by 34.8%,and safety factor against sliping is improved by 16.8%,leading to the stability of wall enhanced.After completion of this scheme,field monitoring revealed that the slope and the diaphragm wall are very stable,and the pit discharge decreases evidently,so the diaphragm wall with pre-stressed vertical bolts is worthy to be popularized widely in the similar projects.
    Discussion on the Integrating Theory and the Model of Mineral Resource Exploitation
    ZHANG Fu-Liang, HU Zhi-Hong, YIN Zhong-Nian
    2009, 39(09):  51-53+57. 
    Asbtract ( 1470 )  
    Related Articles | Metrics
    Based on the Integration meaning of mineral resources exploitation,the integration theory of mineral resources exploitation was discussed,such as optimal deletion theory of exhaustible resource,market forces theory,strategy development and adjustment theory.Three integration models of mineral resources exploitation are analyzed: horizontal integration,vertical integration,hybrid integration.
    Evolution and Optimization of Mining Method in Jinqu Gold Mine
    CHANG Rong-Feng, YUAN Hong-Bo
    2009, 39(09):  54-57. 
    Asbtract ( 1527 )  
    Related Articles | Metrics
    Jinqu gold mining has a capacity of spaces and demands expansion.For this,the optimization method is selected for mining,the numerical simulation method for optimizing the structural parameters of stope,and the orthogonal test for optimizing parameters of rock blasting.At the same time,the sub-level mining process is utilized,where the reserve point column is used to support the roof,long cables and bolting supporting in some place,and the smooth blasting to reduce the destruction of pre-board and to monitor the dynamic sinking of the roof by standard measurement.Research on mining method makes the application of the sub-level filling mining method successful.A result with direct cost 19.07 yuan/t at loss rate of 5.68%,dilution rate of 12.15% has been obtained,which increases the production capacity in the mining to 500 t /d.
    Study on Magnetizing Roasting Tests of Wangjiatan Siderite under Fluidization
    FENG Zhi-Li, YU Yong-Fu, LIU Gen-Fan, CHEN Wen, ZHANG Han-Quan
    2009, 39(09):  58-60+73. 
    Asbtract ( 1767 )  
    Related Articles | Metrics
    The effect of temperature and atmosphere conditions on the magnetization of Wangjiatan siderite under fluidization was investigated.The results showed that Fe concentrate grading of 58.00% at a 90.00% recovery was achieved under conditions of the thermal decomposition ratio over 94.5% and the magnetizing conversion ratio above 89.94% at the temperature of 800~1 060 ℃ and the reducing atmosphere of 1.5%CO.Whenever in the reducing atmosphere（0~1.05%CO) or oxidation atmosphere（0.47~1.85%CO),Fe recovery can reach achieved 90.00% at the temperature of 1000℃.
    Experimental Study on Roasting-magnetic Separation for Linjiang Refractory Iron Ore of Jilin
    GAO Wen-Yi, ZHANG Song-Bo, YIN Wan-Zhong, HAN Yue-Xin
    2009, 39(09):  61-63+77. 
    Asbtract ( 1640 )  
    Related Articles | Metrics
    Lingyang iron ore of Jilin linjiang contains the hematite,magnetite,limonite and siderite,which has a complex Fe composition and structure.And the gangue mineral as chamosite was easy to be slimed.So this kind of ore is a refractory one.The experiments of roasting-magnetic separation for the iron ore showed that at a suitable condition,the Fe concentrate reached up to 60.83% at an iron recovery of 64.1% and Fe grade in tailing of 27.60% by the roasting-magnetic separation,thus laying a foundation for application of Lingyang iron ore in Jilin Linjiang.
    Research on Beneficiation Tests for Masteel Heshangqiao Iron Ores
    GE Xin-Jian
    2009, 39(09):  64-69+116. 
    Asbtract ( 1517 )  
    Related Articles | Metrics
    The ores' characteristics of Masteel Heshangqiao Iron Ore were investigated,and tests on the high-pressure grinding roll were studied.Based on this,a series of beneficiation tests research have been finished from the flow-sheets of stage grinding,stage separation,fine screening,regrinding and re-separation for over-size screening,high pressure grinding roll,stage-separation,fine screening,and again regrinding and re-separation for over-size screening,as well as the flow-sheet of high pressure grinding roll,3~0mm tailing rejection,stage grinding,stage separation,fine screening,and regrinding and re-separation for over-size screenings.A good concentrate grading at 64.87%~66.06% with a 72.00% recovery has been achieved.Due to the characteristics of low grade magnetite,and according to the comparison of the flow-sheet index,operation costs,and flow-sheet reasonability,two flow-sheets consisting of the high-pressure grinding roll,stage grinding,stage separation,fine screening and regrinding and re-separation for over-size screening,as well as the flow-sheet of high-pressure grinding roll,3~0mm tailing rejection,stage grinding,stage separation,fine screening,and regrinding and re-separation for over-size screenings are recommended for Heshangqiao Iron Mine.        
    Study of the Sodium Dodecyl Sulfonate on Hematite Flotation
    ZHENG Gui-Shan, LIU Jiong-Tian
    2009, 39(09):  70-73. 
    Asbtract ( 1845 )  
    Related Articles | Metrics
    This paper studies the flotation tests of hematite using Sodium Dodecyl Sulfonate（SDS) as collector.and the following effect factors as pH,Ca2+,NaF,Na2SiF6 and（NaPO3)6 are investigated.In the process of hematite flotation using SDS as anionic collector,the optimum pH value lies between 3～4, the concentration increase of NaF can activate the hematite flotation，however Ca2+ and（NaPO3)6 can depress the chloride flotation.FT-IR analysis displays that the force of the SDS collector is electrostatic adsorption.
    Synthesis and Application of Flotation Reagents for Donganshan Refractory Iron Ores
    MEI Jian-Ting, WU Lan-Tu-Ya, HE Rong-An, YANG Wei
    2009, 39(09):  74-77. 
    Asbtract ( 1910 )  
    Related Articles | Metrics
    With the grading decrease and components change of Donganshan iron ores,KS-Ⅰ flotation reagent is facing with a great challenge,and it is difficult to satisfy the requirement of iron industry.Then KS-Ⅲ flotation reagent is designed and applied in flotation tests of Donganshan Pellet Plant.Compared with KS-Ⅰ flotation reagent，it can improve above 0.43% Fe concentrate grading and over 0.31% Fe recovery，decrease 0.56% Fe in tailings，reduce above 6.89% consumption of collector.
    The Experimental Research on Extraction of Vanadium from Stone Coal by No-salt-roasting and Low Acid Leaching
    FU Zi-Bi
    2009, 39(09):  78-80+112. 
    Asbtract ( 1759 )  
    Related Articles | Metrics
    The experiments on vanadium extraction from stone coal of a place in HuBei indicate that the method of no-salt-roasting and low acid leaching could get better result,after comparison of five different technologies.The research on such processing parameters as roasting temperature,roasting time,dosage of sulfuric acid and acid leaching time indicates that the extraction rate of vanadium could reach 77.51%～80.33% under the conditions of material particles of -0.147mm,roasting temperature 900℃ ～950℃,roasting time 1～1.5h,， dosage of sulfuric acid 2.5% and acid leaching time 1h at normal leaching temperature.
    Research Status and Development of Pretreatment Technology for the Refractory Gold Ore
    CHEN Hong-Yi, YAO Guo-Cheng
    2009, 39(09):  81-83+194. 
    Asbtract ( 2238 )  
    Related Articles | Metrics
    This paper summarized the research status and development of the pretreatment technology for refractory gold ore at home and abroad,comprehensively analyzed the mechanism,characteristics and application of the eight processes,and evaluated the advantages and disadvantages of the process.Based on prospecting the application of the pretreatment technology for refractory gold ore,the future direction for technology is pointed out.
    Study on Gold and Silver Recovery Technology from Complex Multi-metal Oxidized Ore
    QIU Ting-Sheng, LI Guo-Dong, FANG Xi-Hui
    2009, 39(09):  84-88. 
    Asbtract ( 1690 )  
    Related Articles | Metrics
    The complex multi-metal ores contain many valuable metallic elements like gold,silver,copper,lead and zinc.The paper mainly focuses on gold and silver recovery by the flotation.The gold and silver content in raw ores is 2.40 g/t and 150.00 g/t respectively.Under the condition of grinding to85% -0.074mm and a suitable reagent,and in view of the ore's property,some technical measures as strengthening disperse sludge and floatation are adopted in tests.A good concentrate with gold grade of 27.15g/t at a 50.19% recovery and silver grade of 2181.66 g/t at an 60.42% recovery can be obtained from the process of one celerity flotation,one rough,two cleaning and two scavenging separation.
    Research on Flotation Tests for Nongruri Gold Mine in Tibet
    LIU Xu, WANG Hua-Jun, WANG Yan-Bing, WANG Ai-Guo, LI La-Mei, XIE Yu-Ling
    2009, 39(09):  89-91+164. 
    Asbtract ( 1666 )  
    Related Articles | Metrics
    For the property of Nongruri gold mine in Tibet,the flotation process of one roughing,four scavenging and two cleaning separation is adopted,using sodium butyl xanthates and ammonium-butyl aerofloat as collectors,and water glass as disperser,and terpineol as frother under grinding fineness of less than 91.97% -0.074 mm.The gold concentrate grading of 172.83 g/t at a 93% recovery and a 3.00% yield with 0.36 g/t Fe grade in tailing was obtained,providing a reasonable process for development and utilization of the ores.
    Flotation Test of Improving Gold and Electrum Recovery with MAC-12 Collector
    LIU Wen, XIE Wen-Bing
    2009, 39(09):  92-93+97. 
    Asbtract ( 1474 )  
    Related Articles | Metrics
    In view of the discrete gold ore,and low gold recovery for some fine or extra-fine gold ores by the conventional collector,Mac-12 collector was used to improve gold recovery.The experimental results showed that Mac-12 is a high effective collector for gold.Under the condition of low alkaline medium at pH 9,and compared with the butylxanthate,the flotation index with gold recovery can be improved by 5.41%,and gold grade by 18.74 g/t by Mac-12 collector.
    Research on the Flotation Tests of a Yunan Sulfide Cpper Ore
    YANG Wei, QIN Wen-Qing, ZHANG Jian-Wen
    2009, 39(09):  94-97. 
    Asbtract ( 1441 )  
    Related Articles | Metrics
    The systematic flotation tess were made on a single sulfide copper ore from Yunan, which used a collector combination of Mac-10 and 680 xanthate and two stage closed-circuit grinding. As a result, a copper concentrate grading 27.32% at a recovery of 93.10% was obtained .The element silver was also enriched in the copper concentrate, facilitating a comprehensive utilization.
    Experimental Study on the Bulk Flotation Process of Refractory Molybdenum Ore
    ZHAO Ping, SHAO Wei-Hua, ZHANG Yan-Jiao, LIU Guang-Xue, CHANG Xue-Yong
    2009, 39(09):  98-101. 
    Asbtract ( 1683 )  
    Related Articles | Metrics
    A molybdenum ore had a high content of slimes and carbonate gangue,leading to a great difficulty in its beneficiation.The beneficiation test for this ore adopted a whole flotation process,where modified sodium silicate was used as slime disperser and gangue depressor,lead nitrate as activator,kerosene and RT as collectors,and terpenic oil as frother.The bulk flotation of molybdenum sulfides and oxides was carried out as molybdenum roughing,and the rougher concentrate was then cleaned at heating and high alkaline medium,achieving good results.The molybdenum concentrate grading 30.78% at a 72.03% Mo recovery was obtained from a run-of-mine ore grading 0.17% Mo.
    Application of New Frother JM-208 in the Flotation of Molybdenum Ore
    ZHONG Zai-Ding, WANG Yong-Chao, WEN Xiao-Chan
    2009, 39(09):  102-103+119. 
    Asbtract ( 1551 )  
    Related Articles | Metrics
    The frother used in the flotation of molybdenum ore of Jinduicheng Molybdenum Co.，Ltd  the problem of had the complex composition， unstable quality and produced foaming during coarse roughing and sliming in concentration.It has been proved by laboratory and industrial test that the frother JM-208 can substitute fusel oil completely,improve operating conditions,technical index and reduce reagent costs.
    Experimental Study on Beneficiation Test of Wolframite in a Certain W-Mo Polymetallic Mine of Tibet
    ZHU Yi-Min, ZHOU Jing-
    2009, 39(09):  104-107+178. 
    Asbtract ( 1662 )  
    Related Articles | Metrics
    In order to better recover the wolframite from a certain Tibet W-Mo polymetallic ore mine,3 different beneficiation processes are investigated with good indicators achieved in tests.Finally,the most simple process of flotation-magnetic separation-gravity separation is selected to meet the special requirement in Tibet.The process provides an effective way of dressing for fine-grained wolframites.  
    Study on Copper-Molybdenum Separation Technology for Porphyry Copper Mine
    WANG Hong-Zhong
    2009, 39(09):  108-112. 
    Asbtract ( 1520 )  
    Related Articles | Metrics
    This paper presents the characteristics of molybdenum and the development status of the copper-molybdenum separation technology and also explores the best process condition for the copper-molybdenum separation.The results show that the low recovery problem of molybdenum minerals separation could be resolved when thioglycolic acid was chosen as the separation inhibitors to suppress copper floating molybdenum.The concentration of Mo in the molybdenum could be above 50% steadily,and the recovery of Mo from Cu-Mo separation could be increased to 85% with the optimum conditions after several cleanings.
    Effect of Temperature and Oxide Concentration in Galena Oxidation Process
    JIA Qing-Mei, CAO Bing, CHEN Juan-Nong, TAI Jun-Jun
    2009, 39(09):  113-116. 
    Asbtract ( 1650 )  
    Related Articles | Metrics
    Taking Ferric Sulfate as the Oxidant,a series of oxidation experiments on galena in different oxidation medium concentration are conducted under different condition with pH 2,temperature 50 ℃ and 25 ℃ repectively.Then,the reation rate constant,reaction order，reaction activation and the function of the reaction kinetics can be determined by computation.And some effects of temperature and oxidized medium on galena oxidation speed are studied.Under the condition of 50 ℃,and Fe2(SO4)3 as oxidant,the oxidation reaction rate is very fast when solution concentration is 100m g/L.The higher the concentration is,the more sulfuric acid ion can be got,and the easier sediment of PbSO4 is produced,leading the reaction impeded.And the reaction will be extremely slow or even can't carry on at 25 ℃.
    Synthesis of Superfine Mg(OH)2 Particles by Hydrothermal Method
    NIU Yong-Xiao, FU Jian-Fei, XI Xiao-Feng, WANG 恩De, LI Zhi-Yong
    2009, 39(09):  117-119. 
    Asbtract ( 1664 )  
    Related Articles | Metrics
    Superfine Mg(OH)2particles were synthesized by hydration of MgO made from brucite calcination in CO(NH2)2 alkali solutions.The crystal phase,morphology and size distribution of the Mg(OH)2 particles as prepared were characterized with X-ray(XRD) and scanning electron microscopy(SEM).The results indicated that the solution concentration and additive can remarkably affect the crystal phase and particle size.At a solution concentration of 2.5 mol/L and using PEG 6000 as an additive,the resultant superfine Mg(OH)2particles exhibit a regular hexagonal platelet morphology and a narrow size distribution with an average radius of 250nm and thickness of 150 nm,but the purity of particles remains to be improved.
    Delaunay Triangulation of Geological Body Surfaces Based on Borehole Data
    CHEN Yong-Feng, CHEN Xiao-Peng, WEI Li-Ying
    2009, 39(09):  120-122. 
    Asbtract ( 1361 )  
    Related Articles | Metrics
    Triangulation of geological body surfaces based on borehole data is an important part of 3D geological modeling.The Delaunay triangulation has many perfect mathematical properties,and there are many fully-fledged algorithms now.Some improvements on the traditional algorithms of convex hull's formation,delaunay triangulation and test of empty circumcircle were given,and the calculation efficiency has been enhanced.
    Discussion on Gold Prospecting in Danba Yanzigou Gold Mine
    HOU Lin, WANG Xiong-Wu, PENG Hui-Juan
    2009, 39(09):  123-127. 
    Asbtract ( 2271 )  
    Related Articles | Metrics
    Yanzigou gold deposit is located in Yongxi dome core of Ganzi Danba county in Sichuan province.Ore bodies like Lens and atoid ores occur in the devonian epimetamorphic black shale series.The formation of ore bodies has a close relationship with coarse gold-bearing quartz veins and fine quartz net ores and is obviously affected by the fault.NNW of Maoniuhe river fracture and EW of Mozigou fracture,as well as some related small fracture consist of a Mi-zi type structure which provides a good migration and storage space for ore-forming fluids.In addition,the magma and metamorphism also play an important role in mineralization.In accordance with the known ore bodies,the external exploration is controlled by the ore-body structure and the ore-occurred rocks.Based on these characteristics,it can play a guiding role in external exploration and provide a great significance to explore large atoid gold ores from the fourth formation carbonaceous phyllite in devonian of western Sichuan area. 
    Application of Pipe Flow Mineralization to the Design of New Flotation Column
    LI Guo-Sheng, LIU Jiong-Tian, DENG Li-Jun, CAO Yi-Jun, WANG Yong-Tian
    2009, 39(09):  128-131+134. 
    Asbtract ( 1492 )  
    Related Articles | Metrics
    This paper introduced the concept and implementation conditions of pipe flow mineralization.Based on the analysis of some kinds of flotation column in the pipe flow mineralization for raw ores and middling minerals,the advantages of pipe flow mineralization on both the realization high-efficiency turbulent flow mineralization and the optimization of the equipment structure are discussed,and then,some measures and research directions on optimizing the implementation conditions of pipe flow mineralization are put forward.
    Design of Automatic Control Device for Large Flotation Machine
    HU Guang-Ping, WANG Rui
    2009, 39(09):  132-134. 
    Asbtract ( 2079 )  
    Related Articles | Metrics
    To reduce the production cost and improve the economic benefit,mineral processing equipment is developing towards large size,high efficiency and high automation. An integral design plan of automatic control device for large flotation machine and the related research and development efforts are described. The test shows that this device can enable a stable,reliable operation of the system and is easy to operate and maintain.
    Research and Design of Diaphragm Slurry Pump of Hydraulic Pressure Drive
    WANG 恩Peng, ZHAN Zhao-Yi, SUN Rong-Quan, GUO Yi
    2009, 39(09):  135-137. 
    Asbtract ( 1844 )  
    Related Articles | Metrics
    The paper introduces the slurry pumps transferring two-phase flows with solid particles,and describes its working principles,structure and performance features.This kind of pump has a breakthrough in aspects of isolation method,smooth flow and reliability.
    Design of a New Type of Crusher
    WANG Yuan-Sheng, HUANG Zhi-Chu
    2009, 39(09):  138-139+172. 
    Asbtract ( 2033 )  
    Related Articles | Metrics
    Particle size of material after broken by domestic crusher is much big and non-uniform and the energy consumption is high.Designing a new type of crusher consume lowly energy and get good crushing effect.Materials are constantly struck by high-speed throw from crusher inner plate and high-speed reverse collision from crusher external cylinder,and then are broken into powder by high-speed collision with follow-up materials.Qualified fine materials are emitted by inner-sifter,crude materials continue to be broken.Through many times experiments that according with the actual operating situation,this design method is proved to be feasible.This crusher will benefit increasing economic efficiency and social efficiency of building materials,mining and other enterprises by its energy-saving effect,high efficiency and so on.
    Prediction of the Electromagnetic Radiation in Coal and Rock Failure Based on ANN
    HU Jing-Peng, YANG Gong-Xun
    2009, 39(09):  140-142. 
    Asbtract ( 1619 )  
    Related Articles | Metrics
    Based on the basic principles and implementation steps of adaptive neural network（ANN),the theory and characteristics of ANN prediction of electromagnetic radiation in the process of coal and rock deformation and fracture are studied.The ANN electromagnetic radiation model is applied to predict the acoustic emission and electromagnetic radiation sequence in the process of coal and rock deformation and fracture.The results show that ANN can be used to effectively predict the electromagnetic radiation and acoustic emission signals so as to provide reliable data for judging the state of coal and rock failure.
    Analysis and Optimization on Invalid Casing in Casing Drilling in Luanchuan Molybdenum Mine
    FAN Li-Ming, YIN Kun, WANG Mao-Sen, BO Kun
    2009, 39(09):  143-145. 
    Asbtract ( 1349 )  
    Related Articles | Metrics
    The stratum at Luanchuan Molybdenum Mine is hard,broken,easily leaking and absolutely complex,so that the casing drilling was carried out in exploration tasks.However,the cases during drilling were usually broken at their thread.FEM is used to analyze the tensile strength and fatigue strength for the sake of understanding what makes those cases invalid.The results indicate that the fatigue failure caused by large number of impacts force into the thread is the essential cause to make the thread broken.Then an optimal scheme is put forward,and the new designed cases are applied in field drilling to solve some difficulties.
    Design of Supervisory Control System for Aerial Ropeway Based on PLC
    YU Zhong-An, CHEN Shao-Wei
    2009, 39(09):  146-149. 
    Asbtract ( 1844 )  
    Related Articles | Metrics
    This paper briefly introduced the varieties and characteristic of aerial ropeway,and structure of double circulating ropeway,and analyzed the electric control system of aerial ropeway.The supervisory control system based on PLC for aerial ropeway was designed by studying on the scheme of electric control,providing hardware and software design for the supervisory control system.
    Analysis and Design of Information Management System for Mine Internal Market Based on UML
    WANG Cheng-Gang, WANG Xiao-Dong
    2009, 39(09):  150-151+159. 
    Asbtract ( 2069 )  
    Related Articles | Metrics
    Taking the material handling and internal market in mine as an example,the guiding ideology,application and significance of UML in various stages of management information system development and design were elaborated,and some problems of UML in application situation,design flow-sheet and stage links in completion of main mission were emphatically discussed and solved.So it is clear that UML provided a nimble,legible and also non-ambiguous expression pattern.The efficiency of the system analysis design and code compilation is enhanced,with the demand change rapidly showing.
    New Advancement of Site Mixing and Loading Technique for Underground Mine Explosive
    QIN Hu, GONG Bing, XIONG Dai-Yu, LI Ming-Xu, LI Xin
    2009, 39(09):  152-154+164. 
    Asbtract ( 2254 )  
    Related Articles | Metrics
    One of the technical problems for efficient mining in underground metal mines,is how to achieve mechanized charging in up-hole.Especially when the wall of up-hole is distorted and offset because of blast-hole being squeezed,the conventional charging method may be useless,or the poor charging results in poor blasting quality,and then the normal mining will not be carried out.The paper describes the typical examples for BCJ-charging truck in underground metal mines,and especially new progress in the site-mixing and loading technique in the up-hole（min.borehole diameter 90mm,max.charging length ≥30 m) in Shuangyashan iron mine,has been achieved,which provides the technical support for tight blasting mining of long up-hole.
    Study on the Indicator System of Influencing Factors on the Underground Debris Flow
    SONG Wei-Dong, WANG Yan-Hui, DU Jian-Hua, WANG Yong-Qing, LIU Hong-Guang
    2009, 39(09):  155-159. 
    Asbtract ( 1743 )  
    Related Articles | Metrics
    Based on the survey and analysis of underground debris flow,and using the combining method of expert-level questionnaire survey and the analytic hierarchy process,the factors of underground debris flow formation are researched,and the indicator system of influencing factors about the underground debris flow is established. Studies showed that the factors,such as rainfall and continuing days,soil thickness and its characters,surface subsidence,mining,surface water played the vital roles in the formation of underground debris flow,then providing a theoretical basis on forecasting the occurrence of underground debris flow.
    Application of ANSYS in the Transient Dynamic Analysis of Waste Dump
    ZHANG Feng-Chun, LIANG Li, DAI Yu-Mai
    2009, 39(09):  160-164. 
    Asbtract ( 1666 )  
    Related Articles | Metrics
    The theory of transient dynamic analysis with ANSYS is described briefly.A seismic transient dynamic analysis,which is simplified to a 2D model,is made for the stability of dump slope of a limestone mine.As a result,the characteristic of displacement and acceleration response of different points in the dump slide are defined,which can be reference to the slope engineering dynamic analysis.         
    Experimental Investigation of Three-phase Foam Sealing Liquid for Gas Pressure Determination Borehole
    YU Dong-Fang, CHEN Xue-Xi, MA Shang-Quan, BAI Song
    2009, 39(09):  165-168. 
    Asbtract ( 1373 )  
    Related Articles | Metrics
    In order to select suitable three-phase foam for sealing fracture around borehole,3 kinds of foam agents,4 kinds of stabilizing agents and 3 kinds of solid-phase filler with different particle diameter were studied.Three-phase foam sealing liquid proportion with high foamability,good stability and strong ability of carrying solid was obtained.The proportion is: 0.4 percent of foam agent FP-1,1 percent of stabilizing agent WP-3 and 4 percent of mixed solid-phase filler with 0.2 to 1 mm diameter.Practical application shows that this proportional three-phase foam has characteristics of little sealing borehole time,rapid determination process and high determination accuracy,which is meaningful for raising the level of gas determination.
    Application of Distributed Optical Fiber Sensor Based on BOTDR in the Model Tests of Backfill Mining
    ZHOU Dong-Dong, GAO Qian, DI Shu-Hua, XU Feng-Guang, ZHANG Mei-Hua
    2009, 39(09):  169-172. 
    Asbtract ( 1587 )  
    Related Articles | Metrics
    In order to study the stability of stope and the subsidence of ground surface during the course of mining in southern district of Sijiaying iron mine,one section of mining panel was selected to do the physical and mechanics model test.The distributed optical fiber based on BOTDR was used to monitor the strain of model.It was indicated that the BOTDR-based distributed detection technique for the model was quite effective.Test results show that the model is stable,the movement of stop roof and ground surface is less,the change of strain in the pillar is stable,Bench open stoping and subsequent filling mining is feasible.There were obvious advantages for BOTDR such as distributing,high precision，easy layout，strong anti-interference,and it was a very potential technique for simulation experiment.
    Study on the Slope Stability Based on Finite Difference Method
    MA Cui-Lin, ZHU Ming, WANG Jian-Hua
    2009, 39(09):  173-175+191. 
    Asbtract ( 1601 )  
    Related Articles | Metrics
    The slope stability is simulated and analyzed by finite difference program FLAC software and strength reduction theory.The mining pit slope stability is analyzed by the stress-strain cloud graph,element displacement vectorgraph,plastic state graph,layered destruction yield graph and safety coefficient for a rational assessment of the slope stability.
    Technology for Recovering Iron from Red Mud by Bayer Process
    SUN Yong-Feng, DONG Feng-Zhi, LIU Jiong-Tian, WANG Shu-Hong
    2009, 39(09):  176-178. 
    Asbtract ( 1908 )  
    Related Articles | Metrics
    Based on the study of the properties of the red mud produced by Bayer process,the best technology and conditions for recovering iron from mud are studied.The main mineral of red mud is hematite and hydrated aluminium silicate and the final technology for recovering iron is magnetization roasting-magnetic separation,and the technical parameters for the separation are as follows: the roasting temperature 750 ℃,the roasting time 20 min,the amount of the mixing coal 6%,twice magnetic separation,the magnetic field intensity 0.1 T,based on which the iron concentrate with the iron grade 62.36%,iron recovery 49.60% and S grade 0.273% is obtained.  
    Study on Rheological Properties of Iron Ore Tailings Slurry for Gel Casting
    YUAN Hu-Die, YIN Hong-Feng, REN Yun, ZHANG Jun-Zhan, LU Lin-Lin
    2009, 39(09):  179-181+184. 
    Asbtract ( 1985 )  
    Related Articles | Metrics
    Slurry was prepared using Meishan tailing as raw materials.The viscosity of slurry was detected with NDJ-1-type rotating viscometer.Effect of the pH value,dispersant content,solid-phase content,as well as the size of the tailings on the rheological properties of slurry were investigated.The result showed that: the slurry's viscosity decreased gradually when pH value less than 6,and the viscosity increased when pH value more than 6.When dispersant content was less than 0.25%,the slurry's viscosity decreased as the dispersant increased; It was opposite when dispersant content was more than 0.25%.With solid-phase content increasing,the viscosity of slurry was increased; With increase of milling time,the aggregation of particles took place,leading to the apparent size increased.The aggregation of particles was broken during the preparation of slurry,the particles would be fully dispersed,thus resulting in the viscosity of slurry increase.
    Study on the Iron Recovery from Tailings and Smelting Tailings by High-intensity Magnetic Separation and Gravity Separation
    CHEN Zhi-You, CHEN Qiu-Hu
    2009, 39(09):  182-184. 
    Asbtract ( 1547 )  
    Related Articles | Metrics
    Iron resources in Mineral processing tailing,red mud,smelting tailing,roasting middling ores can be effectively recovered by SLon magnetic separators and centrifuge.The experimental results showed that large amounts of gangue were rejected and iron minerals were concentrated by the Slon magnetic separators with magnetic field strength of 0.7T~0.9T for coarse separation.A Fe concentrate grading of 60% with a higher recovery rate can be achieved under the rotational speed at 400 r/min and washing water about 2 400~2 600 ml/min by the centrifuge.
    Experimental Study on Recovering Sulphur from a Tailing by Flotation
    DU Fei-Fei, 吕Xian-Jun , SUN Li-Jun, CHEN Ping
    2009, 39(09):  185-188. 
    Asbtract ( 1506 )  
    Related Articles | Metrics
    To make a recycling of a beneficiation tailing,an optimal process and process indexes for recovering sulfur were determined based on the process mineralogical study and a series of flotation tests.The test flowsheet consisting of one roughing,one scavenging and a re-concentration of scavenging middlings adopted 300g/t butyl xanthate,60 g/t MIBC and CaO to adjust the pH value to 8.5 in the roughing,and 150 g/t butyl xanthate and 30 g/t MIBC in the scavenging,with no reagent added to the cleaning.As a result,a sulfur concentrate grading 35.95% at a recovery of 65.12% and a sulfur middling grading 20.86% at a recovery of 9.64% were obtained.