高钙体系中柠檬酸对磁黄铁矿的活化作用

发布时间：2018-04-02 22:25

本文选题：磁黄铁矿　切入点：浮选　出处：《金属矿山》2017年03期

【摘要】：矿浆中磁黄铁矿表面极易氧化生成Fe(OH)_3、FeO(OH)和FeSO_4亲水层,高钙体系中FeSO_4进一步与Ca~(2+)反应生成CaSO_4亲水薄膜,导致磁黄铁矿可浮性很差。为解决这一问题,从消除Ca~(2+)的影响着手,以柠檬酸为钙离子络合剂,系统研究了柠檬酸的作用条件,对比了其加入前后矿浆中Ca~(2+)的存在情况、磁黄铁矿的接触角及表面形貌和组分变化,分析了作用机理。结果表明,加入柠檬酸后,相比于单一CuSO_4活化,磁黄铁矿回收率由39.90%提高到92.90%。认为柠檬酸络合消耗了Ca~(2+),阻碍CaSO_4亲水薄膜的产生,同时还能够清洗磁黄铁矿表面氧化产生的Fe(OH)3和FeO(OH),从而提高磁黄铁矿的可浮性。研究为高硫磁铁矿脱硫等涉及磁黄铁矿浮选的难题提供了新的解决思路。
[Abstract]:The surface of pyrrhotite in slurry is easily oxidized to form Feo OH) and FeSO_4 hydrophilic layer. In high calcium system, FeSO_4 further reacts with Ca~(2 to form CaSO_4 hydrophilic film, which leads to poor floatability of pyrrhotite.In order to solve this problem, starting from eliminating the influence of Ca~(2, using citric acid as calcium ion complexing agent, the action conditions of citric acid were systematically studied, and the existence of Ca~(2 in slurry before and after addition of citric acid was compared.The contact angle, surface morphology and composition change of pyrrhotite are analyzed.The results showed that the recovery rate of pyrrhotite increased from 39.90% to 92.90% compared with that of single CuSO_4.It is considered that citric acid complexation consumes Ca~(2 and hinders the production of CaSO_4 hydrophilic film, and it can also clean the Fe(OH)3 and FeOOOHN produced by oxidation on the surface of pyrrhotite, so as to improve the floatability of pyrrhotite.The research provides a new way to solve the problems related to pyrrhotite flotation, such as desulphurization of high sulfur magnetite.
【作者单位】：西安建筑科技大学材料与矿资学院;广西华锡集团股份有限公司;
【基金】：陕西省自然科学基础研究计划项目(编号:2016JM5005) 中国博士后科学基金项目(编号:2016M590934) 西安建筑科技大学人才科技基金项目(编号:RC1342)
【分类号】：TD923.1

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