钡离子对萤石、重晶石和方解石浮选行为的影响  

Effect and Mechanism of Barium Ion on the Flotation of Fluorite, Barite and Calcite

作　　者：冉秀川 高惠民 任子杰 喻福涛 钱玉鹏 

机构地区：[1]武汉理工大学资源与环境工程学院,矿物资源加工与环境湖北省重点实验室,湖北武汉430070 [2]地质矿产资源勘探和开发局,成都综合岩矿测试中心,四川成都610000

出　　处：《非金属矿》2017年第6期73-75,共3页Non-Metallic Mines

基　　金：国家自然科学基金(51504173);中央高校基本科研业务费专项资金(2016IVA048)

摘　　要：难免离子对盐类矿物的浮选有重要影响,Ba^(2+)为萤石-重晶石-方解石型伴生矿的难免离子。通过单矿物浮选试验,考察在pH值为5~9时,Ba^(2+)对油酸钠浮选萤石、重晶石及方解石的影响。通过溶液化学计算、zeta电位测试分析,探讨了Ba^(2+)对3种矿物的作用机理。浮选结果表明:Ba^(2+)对萤石和方解石有抑制作用,对重晶石有活化作用。zeta电位测试结果与溶液化学分析表明:在pH值为5~9时,钡离子以Ba^(2+)组分存在,能与萤石和方解石进行阳离子交换,置换出的Ca^(2+)能消耗溶液中的OL-和(OL)_2^(2-),从而抑制萤石和方解石。Ba^(2+)能减小重晶石表面负电荷,减小颗粒间的排斥力,更易产生颗粒团聚体,增加了重晶石颗粒与气泡碰撞的几率,从而活化重晶石。Through single mineral micro-flotation tests, the effect of Ba^（2＋） on the sodium oleate flotation of fluorite, barite and calcite in the range of p H value range of 5~9 was studied, the mechanism of Ba^（2＋） with three minerals was discussed by solution chemistry and zeta-potential measurements. The flotation results showed that Ba^（2＋） depressed fluorite and calcite while activated barite. In pH value range of 5~9, Ba^（2＋） was the main species of barium ions and showed a cation exchange process with fluorite and calcite. The exchanged Ca^（2＋） can consume the OL-and（OL）_2^（2-） and thus the Ba^（2＋）showed a depression on fluorite and calcite. The negatively-charge of barite was neutralized by Ba^（2＋） and it can reduce the repulsion force between barite particles, moreover, Ba^（2＋） was benefit to the formation of particle aggregations and increase the collision efficiency between particles and bubbles, thus barite was actived.

关 键 词：萤石 重晶石 方解石 钡离子 溶液化学 

分 类 号：TD923.4[矿业工程—选矿]