Fe^(3+)对细粒菱锌矿和方解石分散行为的影响  

Effect of Fe^(3+)on dispersion behavior of fine smithsonite and calcite

作　　者：马子龙[1] 潘文峰 廖寅飞[1] 曹亦俊[1,3] 李树磊 陈小国[1] MA Zilong;PAN Wenfeng;LIAO Yinfei;CAO Yijun;LI Shulei;CHEN Xiaoguo(National Engineering Research Center for Coal Preparation and Purification,China University of Mining and Technology,Xuzhou 221116,China;School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou 221116,China;School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]中国矿业大学国家煤加工与洁净化工程技术研究中心,徐州221116 [2]中国矿业大学化工学院,徐州221116 [3]郑州大学化工学院,郑州450001

出　　处：《中国有色金属学报》2024年第3期923-933,共11页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2021YFC2903104)。

摘　　要：方解石矿泥的覆盖和高价金属阳离子的存在是影响粒径−20μm细粒菱锌矿浮选效果的关键因素,两者通过改变菱锌矿的表面性质而恶化其分散性和浮选环境。本文选择菱锌矿浮选中常见的Fe^(3+)为研究对象,通过吸附试验、Zeta电位、XPS分析,DLVO理论计算等考察Fe^(3+)对菱锌矿和方解石的分散行为规律和作用机理。结果表明:两种矿物对Fe^(3+)的吸附行为基本一致,但Fe^(3+)对菱锌矿分散行为的影响程度大于Fe^(3+)对方解石分散行为的影响。当Fe^(3+)浓度为5×10^(−4)mol/L时,菱锌矿分散行为被完全破坏。溶液化学及DLVO理论计算结果表明,Fe^(3+)吸附在矿物表面形成了羟基络合物或Fe(OH)3,导致菱锌矿颗粒间作用力小于方解石的,这是Fe^(3+)破坏菱锌矿分散行为、影响粒径−20μm细粒菱锌矿浮选的主要原因。The cover of calcite slime and the presence of high-valent metal cations were the challenges in the sorting effect of fine-grained smithsonite with particle size of−20μm.Both of them deteriorated the dispersion and sorting environment of the smithsonite by changing its surface properties.In this paper,the common metal cation ion(iron ion)in smithsonite was selected as the object of study.The pattern and form of action of iron ion on the dispersion behavior of smithsonite and calcite were investigated by adsorption test,zeta potential,XPS analysis,and DLVO theoretical calculation.The results show that the adsorption behavior of both minerals for iron ions is basically the same.However,the effect of iron ions on the dispersion behavior of smithsonite is greater than calcite.The dispersion behavior of smithsonite is destroyed when the concentration of iron ions is 5×10^(−4)mol/L.The solution chemical analysis and DLVO theoretical calculations indicate that the adsorption of iron ions on the mineral surface form hydroxyl complexes or Fe(OH)_(3)leading to a smaller inter-particle interaction force of smithsonite than calcite.This is the main reason why iron ions disrupt the dispersion behavior of smithsonite and deteriorate the sorting of fine-grained smithsonite with particle size of−20μm.

关 键 词：Fe^(3+) 细粒 菱锌矿 方解石 分散行为 

分 类 号：TD952[矿业工程—选矿]