国外某伴生自然铜铁矿石工艺矿物学研究

金属矿山 ›› 2024, Vol. 53 ›› Issue (2): 183-.

国外某伴生自然铜铁矿石工艺矿物学研究

骆洪振^1,2张　凛^1,2　徐　健^1,2杨含蓄^1,2　赛明雨^1,2

1. 中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山 243000; 2. 金属矿山安全与健康国家重点实验室,安徽马鞍山 243000

出版日期:2024-02-15 发布日期:2024-04-03
基金资助:
国家重点研发计划项目(编号:2022YFC2905003)

Study on Process Mineralogy of a Foreign Associated Natural Copper-iron Ore

LUO Hongzhen^1,2　ZHANG Lin^1,2　XU Jian^1,2　YANG Hanxu^1,2　SAI Mingyu^1,2

1. Sinosteel Maanshan General Institute of Mining Research Co. ,Ltd. ,Maanshan 243000,China; 2. State Key Laboratory of Safety and Health for Metal Mines,Maanshan 243000,China

Online:2024-02-15 Published:2024-04-03

摘要/Abstract

摘要： 为了给国外某伴生自然铜铁矿石选矿工艺研究提供理论依据,采用矿物参数自动分析系统(MLA),结合化学分析、光学显微镜、XRD 等分析方法对其进行详细的工艺矿物学研究。结果表明,矿石Cu 品位1. 06%、铁品位 44. 91%,铜主要以自然铜形式存在,分布率为66. 98%;铁主要以磁铁矿和赤、褐铁矿形式存在,分布率分别为41. 26% 和45. 05%。矿石构造主要为浸染状构造、层状构造和块状构造,主要结构为斑状结构、网状结构、粒状结构、包含结构和交代残余结构。矿石矿物种类较多,可综合回收利用的矿物为磁铁矿、自然铜及硫化铜矿物。矿石中自然铜与褐铁矿共生紧密,黄(辉)铜矿与脉石矿物及磁黄铁矿共生紧密;矿石中磁铁矿呈斑状与假象赤铁矿、褐铁矿紧密共生。铜矿物中自然铜、黄铜矿(辉铜矿)集合体以微细粒嵌布为主,-60 μm 粒级分布率分别为82. 24%和86. 15%;铁矿物嵌布粒度由粗到细为:d褐铁矿>d磁铁矿>d赤铁矿,三者均以细粒嵌布为主,-100 μm 粒级分布率分别为56. 57%、69. 87%和 82. 31%,矿石需磨至60 μm 以下才能使得铜矿物和铁矿物均大部分单体解离。矿石中褐铁矿在磨矿浮选过程中易泥化,进而恶化铜分选指标。因此,按照仅回收硫化铜和自然铜计算,铜理论回收率为81. 01%。推荐的选别流程为原矿磨矿—铜硫混浮—混浮尾矿磁选回收磁铁矿—混浮精矿重浮联合回收铜。

关键词: 铜铁矿石　工艺矿物学　嵌布特征

Abstract: In order to provide a theoretical basis for the beneficiation process research of a foreign associated natural copper- iron ore,a detailed process mineralogy study was carried out by using mineral liberation analyser (MLA),combined with chemical analysis,optical microscopy,XRD and other analytical methods. The results show that the ore grade of Cu is 1. 06%, the grade of Fe is 44. 91%,and the Cu mainly exists in the form of natural Cu with a distribution rate of 66. 98%,while the Fe mainly exists in the form of magnetite and hematite-limonite with a distribution rate of 41. 26% and 45. 05%,respectively. The ore structure mainly consists of disseminated structures,layered structures,and block structures,and the main mineral structure is porphyry structure,network structure,granular structure,closed structure and residual structure. The ore contains a large variety of minerals,and the minerals that can be comprehensively recycled are magnetite,natural copper and copper sulfide minerals. The natural copper in the ore is closely symbiotic with limonite,and the chalcopyrite (chalcocite) is closely symbiotic with the gangue and pyrrhotite;the porphyritic magnetite in the ore closely symbiotic with martite and limonite. Natural copper, chalcopyrite and chalcopyrite assemblages are mainly in the form of microfine grains,-60 μm particle size distribution rate of 82. 24% and 86. 15%;iron minerals embedded in the particle size from coarse to fine:dlimonite >dmagnetite >dhematite,all three are mainly in the form of fine grains,-100 μm particle size distribution rate of 56. 57%,69. 87% and 82. 31%,respectively,The ore needs to be ground to below 60 μm in order to dissociate most of the copper and iron minerals. Limonite in the ore is easy to sludge in the milling and flotation process,which will deteriorate the index of copper minerals separation. Therefore,based on the recovery of only copper sulfide and natural copper,the theoretical copper recovery is 81. 01%. The recommended beneficiation process is raw ore grinding-copper and sulfur mixed flotation-mixed flotation tailings magnetic separation to recover magne-tite-mixed flotation concentrate gravity separation and flotation combined to recover copper minerals.

Key words: Natural copper-iron ore,Process mineralogy,Dissemination characteristics

骆洪振, 张　凛, 徐　健, 杨含蓄, 赛明雨. 国外某伴生自然铜铁矿石工艺矿物学研究[J]. 金属矿山, 2024, 53(2): 183-.

LUO Hongzhen, ZHANG Lin, XU Jian, YANG Hanxu, SAI Mingyu. Study on Process Mineralogy of a Foreign Associated Natural Copper-iron Ore[J]. Metal Mine, 2024, 53(2): 183-.

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