河北某低品位磁铁矿石制备超纯铁精矿试验研究  

Experimental Study on Preparation of Ultra Pure Iron Concentrate from a Low-grade Magnetite Ore in Hebei Province

作　　者：赵文坡 ZHAO Wenpo(Changsha Research Institute of Mining and Metallurgy Co.,Ltd.)

机构地区：[1]长沙矿冶研究院有限责任公司,湖南省长沙市410012

出　　处：《现代矿业》2024年第8期154-157,161,共5页Modern Mining

摘　　要：为探究河北某低品位磁铁矿石制备超纯铁精矿的可行性,以传统工艺矿物学研究方法为基础,结合化学分析、扫描电镜等手段,对该矿石化学组成、矿物组成、磁铁矿嵌布特征等进行了系统研究,矿石中磁铁矿平均含铁71.82%。采用磁浮联合工艺进行试验研究,在一段磨矿细度为-0.074 mm55%,二段磨矿细度P_(80)为25μm的条件下,经阶段磨矿—阶段弱磁选流程,可获得TFe品位为70.18%的弱磁精矿;对弱磁精矿进行三段磨矿(P_(80)=21μm)后,以胺类捕收剂CYA-20和淀粉类抑制剂CYZ为选别药剂,经1粗2精反浮选闭路流程,可获得超纯铁精矿TFe品位71.64%、对原矿回收率62.56%,普通铁精矿TFe品位66.13%、对原矿回收率22.48%的选别指标。研究成果为该磁铁矿石的高附加值利用提供了依据。In order to explore the feasibility of preparing ultra-pure iron concentrate from a low-grade magnetite ore in Hebei Province,based on the traditional process mineralogy research methods,combined with chemical analysis,scanning electron microscopy and other means,the chemical composition,mineral composition and magnetite dissemination characteristics of the ore were systematically studied.The average iron content of magnetite in ore is 71.82%.The experimental study was carried out by magnetic-flotation combined process.Under the condition of the first grinding fineness of-0.074 mm 55%and the second grinding fineness of P_(80)=25μm,the low intensity magnetic concentrate with TFe grade of 70.18%can be ob⁃tained by stage grinding-stage low intensity magnetic separation process.After third stage grinding(P_(80)=21μm)on low-intensity magnetic concentrate,the amine collector CYA-20 and the starch inhibitor CYZ were used as the separation reagents,and the closed-circuit reverse flotation process of one roughing,two cleaning was used to obtain the separation index of ultra-pure iron concentrate with TFe grade of 71.64%and recovery of 62.56%,and ordinary iron concentrate with TFe grade of 66.13%and recovery of 22.48%.The research results provide a basis for the high value-added utilization of the magnetite ore.

关 键 词：磁铁矿 超纯铁精矿 磁选 浮选 

分 类 号：TD951[矿业工程—选矿]