Floc flotation of marmatite fines in aqueous suspensions induced by butyl xanthate and ammonium dibutyl dithiophosphate  

水悬浮液中用KBX和ADD诱导细粒铁闪锌矿的絮团浮选(英文)

作　　者：张婷[1] 覃文庆[1] 杨聪仁[1] 黄水鹏 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第5期1578-1586,共9页中国有色金属学报（英文版）

基　　金：Project(51274255)supported by the National Natural Science Foundation of China;Project supported by the Foundation of State Key Laboratory of Comprehensive Utilization of Low-Grade Ores(Zijin Mining Group Co.,Ltd),China

摘　　要：The hydrophobic flocculation of marmatite fines in aqueous suspensions induced by butyl xanthate （KBX） and ammonium dibutyl dithiophosphate （ADD） was investigated using laser particle size analysis, microscopy analysis, electrophoretic light scattering, contact angle measurement and infrared spectroscopy. The studies were performed on single minerals with size 〈20 μm by varying several parameters, including pH, collector concentration and kerosene addition. The results show that the floc fotation closely correlated with the size of flocs and the particle hydrophobicity, but was not lowered with increasing the particle surface charges due to collector adsorption. Under good operating conditions, the floc flotation of marmatite fines as a function of KBX and ADD can all reach floatability over 90%, in comparison with conventional flotation obtaining floatability of about 60%. It also has been found that a small addition of kerosene greatly improved the floc flotation because of the formation of oil films on marmatite particles. The results of FTIR spectra indicate that adsorption of the two collectors onto marmatite were chemical adsorption.采用激光粒度分析、显微镜分析、电泳光散射、接触角测量和红外光谱研究了水悬浮液中用丁基黄药(KBX)和丁铵黑药(ADD)诱导细粒铁闪锌矿的疏水絮凝。通过改变各种参数,其中包括pH值、捕收剂浓度和煤油用量,研究了粒度小于20μm的单矿物的絮团浮选行为。结果表明,絮团浮选效果与絮团粒度和颗粒疏水性密切相关,但是由于捕收剂的吸附导致的颗粒表面电性增大并没有降低絮团浮选效果。在优化的操作条件下,在KBX和ADD的作用下细粒铁闪锌矿的絮团浮选回收率均高于90%,而常规浮选的回收率只有60%左右。试验还发现,由于铁闪锌矿颗粒表面油膜的形成,少量煤油的添加可大幅度改进浮选指标。FTIR光谱结果表明这两种药剂在铁闪锌矿表面的吸附均为化学吸附。

关 键 词：hydrophobic flocculation marmatite fines zeta potential contact angle butyl xanthate （KBX） ammonium dibutyl dithiophosphate （ADD） KEROSENE 

分 类 号：TD952[矿业工程—选矿]