辽宁某低品位菱镁矿除杂可选性研究  

Study on Separability of Silicate and Dolomite from a Low-Grade Magnesite Ore from Liaoning

作　　者：谭欣[1,2] 郑桂兵[2] 尹琨[2] 朱阳戈[2] 吴桂叶[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京矿冶研究总院矿物加工科学与技术国家重点实验室,北京100160

出　　处：《有色金属（选矿部分）》2015年第2期54-57,67,共5页Nonferrous Metals（Mineral Processing Section）

基　　金：国家高技术研究发展计划(863计划)项目(2011AA060101)

摘　　要：针对辽宁某硅钙杂质含量较高的低品位菱镁矿矿石,采用等可浮反浮选—正浮选强化脱杂工艺进行了除杂可选性研究。其中,等可浮反浮选作业在中性矿浆p H(7.0左右)环境中,以水玻璃为调整剂,BK428(阳离子型捕收剂)为捕收剂,脱除含硅钙脉石;正浮选作业以六偏磷酸钠为抑制剂,BK410B(阴离子型捕收剂)为捕收剂,强化脱除含钙硅脉石。试验结果表明,采用上述工艺流程与药剂制度选别Mg O品位为45.85%、Si O2含量2.40%和Ca O含量0.87%的低品位菱镁矿矿石,获得了Mg O品位为46.81%、回收率为80.78%的菱镁矿精矿,精矿中Si O2和Ca O含量分别降至0.54%和0.69%。In this paper,it is carried out the study of separability of removing impurities by flotation from a low-grade magnesite ore with high contents of silicate and dolomite in Liaoning province. In the flotation process, iso-flotability reverse flotation with water glass as regulator and novel anionic collector BK428 under condition of neutral pulp（p H 7.0） is adopted to remove silicate and dolomite, and direct flotation by sodium hexametaphosphate as regulator and cationic collector BK410 B is used to further remove dolomite and silicate. By this＂iso-flotability reverse-direct flotation＂process,from the low grade magnesite ore with Mg O 45.85%,the magnesite concentrate with a Mg O grade of 46.81% and a recovery of 80.78%is obtained, moreover, Si O2 and Ca O content in concentrate decreased from 2.40% and 0.87% to 0.54%and 0.69% respectively.

关 键 词：低品位菱镁矿 含硅矿物 白云石 等可浮反浮选 正浮选 BK-428 

分 类 号：TD973.9[矿业工程—选矿] TD923.7