袁家村微细粒难选磁赤混合铁矿石提铁降硅试验研究  

Experimental Study on Silicon Reduction and Iron Increasing of a Micro-fine Refractory Magnetite-Hematite Mixed Iron Ore in Yuanjiacun

作　　者：李贤[1] 吴承优 罗良飞[2] LI Xian;WU Chengyou;LUO Liangfei(Jianshan Iron Mine,Mining Company of Taiyuan Iron&Steel(Group)Co.,Ltd,Loufan 030300,China;Changsha Research Institute of Mining and Metallurgy Co.,Ltd.,Changsha 410012,China)

机构地区：[1]太原钢铁(集团)有限公司矿业分公司尖山铁矿,山西娄烦030300 [2]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《金属矿山》2024年第1期197-201,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51604040)。

摘　　要：袁家村铁矿选矿厂原生产工艺流程获得的铁精矿TFe品位仅65%左右、SiO_(2)含量达4%~5%,难以满足市场对高品质铁精矿的需求。为此,在详细分析生产流程中混合磁选精矿性质的基础上,采用卧式搅拌磨机细磨—弱磁选+强磁选—反浮选工艺流程开展了提铁降硅试验研究。对TFe品位42.44%、SiO_(2)含量35.42%的混合磁选精矿,在磨矿细度为-0.045 mm占97%情况下,全流程试验获得了产率53.87%、TFe品位67.87%、SiO_(2)含量1.96%、TFe回收率86.15%的高品质铁精矿;磨矿细度为-0.045 mm占94%情况下,适当增大捕收剂RA用量,可获得产率54.76%、TFe品位67.14%、SiO_(2)含量2.09%、TFe回收率86.63%的高品质铁精矿。研究结果可作为选矿厂提铁降硅工艺流程优化决策依据,对类似性质难选铁矿石的高效开发利用具有参考价值。Iron concentrate with TFe grade of only about 65%and SiO_(2) content of 4%~5%was obtained using original production process in Yuanjiacun Iron Ore concentrator,which is difficult to meet the market demand for high-quality iron con-centrate.Therefore,based on the detailed analysis of the properties of the mixed magnetic concentrate in the production process,a process of fine grinding,low-intensity and high-intensity magnetic separation and reverse flotation was used to carry out an experimental study on iron extraction and silicon reduction.For a mixed-magnetic concentrate with TFe grade of 42.44%and SiO_(2) content of 35.42%,high quality iron concentrate with yield of 53.87%,TFe grade of 67.87%,SiO_(2) content of 1.96%and TFe recovery rate of 86.15%could be obtained under the condition of grinding fineness of-0.045 mm account-ing for 97%.When the fineness of grinding is-0.045 mm accounting for 94%and the amount of RA collector is appropriately increased,high quality iron concentrate with yield of 54.76%,TFe grade of 67.14%,SiO_(2) content of 2.09%and TFe recovery rate of 86.63%could be obtained.The research results could be used as the process optimization decision basis for iron extrac-tion and silicon reduction in concentrator,and have reference value for the development and utilization of refractory iron ore with similar properties.

关 键 词：卧式搅拌磨机 组合式强磁选机 提铁降硅 反浮选 高品质铁精矿 

分 类 号：TD951[矿业工程—选矿] TD923