钙镁离子对白云石浮选矿浆流变性的影响研究  

Effect of calcium and magnesium ions on the rheological characteristics of dolomite pulp

作　　者：章铁斌 刘文宝 张覃[2,3,4] ZHANG Tiebin;LIU Wenbao;ZHANG Qin(College of Resource and Environmental Engineering,Guizhou University,Guiyang 550025,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guiyang 550025,China;Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources,Guiyang 550025,China;Guizhou Academy of Sciences,Guiyang 550001,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550025 [2]喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳550025 [3]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025 [4]贵州科学院,贵州贵阳550001 [5]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《贵州科学》2024年第2期74-77,共4页Guizhou Science

基　　金：国家自然科学基金(52164018)。

摘　　要：磷矿反浮选脱镁过程中,白云石溶解和回水循环利用导致矿浆中钙镁离子增多,影响白云石的浮选行为,进而影响磷灰石与含钙脉石矿物的分离,因此调控含钙脉石矿物浮选行为的研究是磷矿石分选的研究热点。本研究以常见的含钙脉石矿物——白云石为对象,在不同钙离子和镁离子浓度下进行单矿物浮选试验、矿物颗粒分布和矿浆黏度测试,分析了钙离子和镁离子对白云石浮选流变性的影响,结果表明:弱酸性条件下,钙镁离子在改变矿浆黏度的同时也能影响浮选结果;钙离子对白云石有一定抑制作用,随着钙离子浓度升高,白云石上浮率先降低后有一定程度的上升,矿浆黏度则表现出先上升后下降的趋势;镁离子可以活化白云石上浮,随着镁离子浓度升高,白云石的上浮率先增加后趋于稳定,矿浆黏度表现出先下降后稳定的趋势。In the process of removing magnesium from phosphate rock through reverse flotation,the dissolution of dolomite and the recycling of backwater would lead to the increase of calcium and magnesium ions in the pulp.This study took dolomite as the research object,and carried out single mineral flotation test,mineral particle distribution test,and pulp viscosity test under different concentrations of Ca^(2+)and Mg^(2+).The results were as follows:under weak acidic conditions,Ca^(2+)and Mg^(2+)would affect the flotation results while changing the viscosity of the pulp;Ca^(2+)had a certain inhibitory effect on the dolomite;with the increase of Ca^(2+)concentration,the floating rate of dolomite decreased first and then increased,while the viscosity of the pulp increased first and then decreased;Mg^(2+)would activate the dolomite;with the increase of Mg^(2+)concentration,the floating rate of dolomite increased first and then remained stable,while the viscosity of the pulp decreased first and then remained stable.

关 键 词：白云石 微细粒 钙镁离子 矿浆流变性 

分 类 号：TD97[矿业工程—选矿]