Fe3+对细粒菱锌矿和方解石分散行为的影响
Effect of Fe3+on dispersion behavior of fine smithsonite and calcite
马子龙 1潘文峰 2廖寅飞 1曹亦俊 3李树磊 1陈小国1
作者信息
- 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. 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;郑州大学 化工学院,郑州 450001
- 折叠
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-20 μm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Fe3+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Fe3+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Fe3+的吸附行为基本一致,但Fe3+对菱锌矿分散行为的影响程度大于Fe3+对方解石分散行为的影响.当Fe3+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,Fe3+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Fe3+破坏菱锌矿分散行为、影响粒径-20 μm细粒菱锌矿浮选的主要原因.
Abstract
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-20 μm.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-20 μm.
关键词
Fe3+/细粒/菱锌矿/方解石/分散行为Key words
Fe3+/fine grain/smithsonite/calcite/dispersion behavior引用本文复制引用
基金项目
国家重点研发计划(2021YFC2903104)
出版年
2024
NETL
NSTL
万方数据