CMC在硫化矿浮选中的抑制作用及其抑制性能影响因素  

Depression effect of CMC on sulfide ore flotation and its influencing factors

作　　者：黄蓉 刘建[1] 杨东 余晓光 郝佳美 HUANG Rong;LIU Jian;YANG Dong;YU Xiaoguang;HAO Jiamei(Kunming University of Science and Technology,Kunming 650000,China;Mineral Chinalco Peru S.A.,Lima 15023,Peru)

机构地区：[1]昆明理工大学国土资源工程学院,昆明6500002 [2]中铝秘鲁矿业公司,秘鲁15023

出　　处：《工程科学学报》2024年第4期627-636,共10页Chinese Journal of Engineering

基　　金：国家自然科学基金面上资助项目(52174251)。

摘　　要：抑制剂在浮选过程中对矿物的选择性分离起着重要作用.羧甲基纤维素(CMC)是一种高效无污染的选矿抑制剂,广泛应用于典型硫化矿的选择性浮选.尽管过去研究者对CMC在选矿中的应用进行了大量研究,但CMC在硫化矿浮选中的抑制作用及抑制效果的影响因素并未进行系统地总结.本文综述了CMC对方铅矿、黄铜矿、黄铁矿等硫化矿以及硫化矿浮选中含镁硅酸盐脉石矿物的抑制作用机理,总结了在硫化矿浮选中,CMC自身性质、矿浆pH、其他金属离子的存在、药剂用量、药剂添加顺序等因素对CMC抑制性能的影响,旨在为硫化矿高效浮选分离提供参考.Depressants are crucial for the selective separation of mineral flotation.Depressants can be classified into organic and inorganic depressants.Inorganic depressants have the disadvantages of toxicity,large dosage,and poor separation efficiency.Therefore,organic depressants are more suitable for mineral separation due to their advantages of biodegradability,comprehensive source,environmentally friendly,and high selectivity.Carboxymethyl cellulose(CMC)is an efficient,nontoxic,and biodegradable mineral-processing depressant widely used in the selective flotation of typical sulfide ores.CMC is one of the essential reagents for cyanide-free and dichromate-free flotation.Therefore,applying and promoting the use of CMC has positive practical significance environmentally.Although research on applying CMC in mineral processing has been conducted in the past,the depression effect of CMC on sulfide ore flotation and its influencing factors have not been systematically summarized.Many sulfide ores frequently coexist with magnesium-containing silicate minerals,such as talc.Adding CMC has a depression effect on sulfide ore and gangue minerals,such as talc.This paper reviews the depression mechanism of CMC on typical sulfide ores,such as galena,chalcopyrite,and pyrite.The results show that the depression effect of CMC on typical sulfide ores is primarily related to the carboxyl and hydroxyl groups in CMC.Both groups depress the typical sulfide ore through hydrogen bonding,electrostatic interaction,and chemical action on the mineral surface.There is a view that the depression of CMC on pyrite relates to its supramolecular conformation.Furthermore,this paper summarizes the depression mechanism of CMC on magnesium-containing silicate gangue.Magnesium silicate gangue,represented by talc,easily clots during grinding,increasing the beneficiation challenges.By adding CMC,the surface wettability can be adjusted and,thus,depress gangue.Finally,this paper systematically expounds on the influence of CMC’s properties,pulp pH,presence of

关 键 词：CMC 硫化矿 含镁硅酸盐矿物 抑制剂 影响因素 

分 类 号：TD163.2[矿业工程—矿山地质测量]