铁矿粉表面性质与过滤性能关系的研究

金属矿山 ›› 2020, Vol. 49 ›› Issue (11): 124-128.

铁矿粉表面性质与过滤性能关系的研究

杨涛，青格勒，董香娟，贺金文，田筠清，张彦

1. 首钢集团有限公司技术研究院，北京 100043；2. 绿色可循环钢铁流程北京市重点实验室，北京 100043；3. 首钢京唐钢铁联合有限责任公司炼铁部，河北唐山 063200

出版日期:2020-11-15 发布日期:2020-12-22

Study on Relationship between Surface Properties and Filtration Performance of Different Iron Ore Powders

YANG Tao，QING Gele，DONG Xiangjuan，HE Jinwen，TIAN Junqing，ZHANG Yan

1. Shougang Research Institute of Tecnology， Beijing 100043，China； 2. Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology， Beijing 100043， China ； 3. Department of Ironmaking，Shougang Jingtang Unitd Iron and Steel Co.， Ltd.， Tangshan 063200，China

Online:2020-11-15 Published:2020-12-22

摘要/Abstract

摘要： 不同的烧结粉矿在细磨后过滤性能差异明显，且多数烧结粉矿在细磨后表现出较难过滤的特点。为研究不同细磨烧结粉矿过滤性能的影响因素，将罗伊山粉、巴烧粉、安哥拉粉、肯尼亚粉、毛塔粉5种不同烧结粉矿细磨至-0.074 mm占86.60%，在矿浆浓度60%，压力0.06 MPa、过滤时间180 s的条件下进行过滤试验，从矿粉表面形貌、比表面积、表面吸附水分等矿粉表面性质角度研究其与过滤性能的关系。结果表明： 5种烧结粉矿在细磨后，表面较粗糙、粘附细颗粒较多的矿粉滤饼水分较高，过滤速率较低；滤饼水分较高、过滤速率较低的矿粉比表面积值也较高，相应表面粗糙度也大；矿粉表面吸附最大分子结合水和过滤无法脱除毛细水决定了滤饼的含水量，滤饼水分高的矿粉表面结合水吸附能力和颗粒间毛细作用更强。因此，改善矿粉的表面性质，可以作为一种提高细磨烧结粉矿的过滤性能的途径。

关键词: 细磨烧结粉矿, 过滤性能, 表面粗糙度, 比表面积, 表面吸附水分

Abstract: The filtration performance of different sinters after fine grinding is obviously different， and most of them are difficult to filter after fine grinding. In order to study the influence factors on the filtration performance of different fine grinding sinter fines， five kinds of sinter powders， namely Roy Hill powder， Brazilian powder， Angora powder， Kenya powder and Mauritania powder， were finely ground to -0.074 mm accounting for 86.60%. The filtration test was carried out under the conditions of pulp concentration of 60%， pressure of 0.06 MPa and filtration time of 180 s， and the relationship between the surface morphology， specific surface area， surface water adsorption and filtration performance was studied. The results showed that after the fine grinding of the five kinds of sinter fines， the filter cake with rough surface and more adherent fine particles has higher moisture content and lower filtration rate. The specific surface area value of the mineral powder with higher moisture content and lower filtration rate is also higher， and the correponding surface roughness degree are high. The maximum molecular binding water adsorbed on the surface of ore powder and the capillary water that cannot be removed by filtration determine the moisture content of filter cake. The adsorption capacity of bound water on the surface of mineral powder with high water content of filter cake and capillary effect among these particles are stronger. Therefore， improving the surface properties of fine grinding sinter powder could be used as a way to improve the filtration performance of fine grinding sinter powder.

Key words: fine grinding sinter powder, filtration performance, surface roughness degree, specific surface area, water adsorbed on the surface

杨涛, 青格勒, 董香娟, 贺金文, 田筠清, 张彦. 铁矿粉表面性质与过滤性能关系的研究[J]. 金属矿山, 2020, 49(11): 124-128.

YANG Tao, QING Gele, DONG Xiangjuan, HE Jinwen, TIAN Junqing, ZHANG Yan. Study on Relationship between Surface Properties and Filtration Performance of Different Iron Ore Powders[J]. Metal Mine, 2020, 49(11): 124-128.

[1]	焦淑芳, 邹鹏, 刘曙. 国产辊套对程潮铁矿球团厂进口辊压机的修复效果[J]. 金属矿山, 2013, 42(10): 165-166.
[2]	张旭芳, 倪文, 王薇, 郑永超, 伏程红. 水胶比和细度对矿渣粉煤灰胶凝材料性能的影响[J]. 金属矿山, 2009, 39(11): 37-39+85.
[3]	王萍, 李国昌. 焙烧温度对硅藻土陶粒孔隙特征的影响[J]. 金属矿山, 2008, 38(03): 133-137.