电化学方法研究FXL-14捕收黑钨矿机理

来源期刊：中南大学学报(自然科学版)1987年第3期

论文作者：朱玉霜 肖有明

文章页码：257 - 262

关键词：电化学过程； 黑钨矿； 捕收(矿物)； 碳糊(电极用)； 碳电极； 化学吸附； 膦酸； 亚胺基； 烷烃； 捕收剂；十四胺基亚氨基二次甲基磷酸

Key words：electrochemical process； wolframite； collecting； carbon pastes(for electrodes)； corbon electrodes； chemical adsorption； phosphonic acid； imino group； alkane； collectors；tetradecyl imino-bimethl phosphonic acid

摘    要：本文用电化学方法研究FXL-14(十四烷基亚氨基二次甲基膦酸)捕收黑钨矿的机理,为此制备了黑钨矿碳糊电极,用等腰三角波电位法测定该电极在FXL-14溶液中的微分电容和吸附热,从而得出FXL-14在黑钨矿表面的吸附属化学吸附的结论。

Abstract: In this paper, adsorption mechanism of the collector FXL-14 (tetradecyl imino- bimethyl phosphonic acid) by wolramite was investigated by means of electrochemical method. For this purpose, carbon paste electrode (wolframite + carbon + paraffin wax) was prepared. With the carbon paste electrode, the problem of poor conductivity of wolframite was solved. Double-layer capacitance of carbon paste electrode was measured with triangular potential sweep, and adsorption heat was estimated. According to the value of adsorption heat (Q=10. 6 kcal/mol), we can conclude that FXL-14 wolframite Chemical adsorption is reasonable. The proposed adsorption mechanism is: in lower pH (pH= 3--7.), the collector adsorpts on the ore surface directly with forming coordinate covalence bond, whereas in higher pH (pH>9), the collector adsorpts on the surface by exchanging adsorption with