Exploration of amino trimethylene phosphonic acid to eliminate the adverse effect of seawater in molybdenite flotation

Exploration of amino trimethylene phosphonic acid to eliminate the adverse effect of seawater in molybdenite flotation
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氨基三亚甲基膦酸消除辉钼矿浮选海水不利影响的探索

DOI:
10.1016/j.ijmst.2021.10.010
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发表时间:
2021-11
影响因子:
11.8
通讯作者:
Siyuan Yang
Siyuan Yang
中科院分区:
工程技术1区
文献类型:
--
作者:
Guanghua Ai;Kaihua Huang;Cheng Liu;Siyuan Yang

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采用氨基三甲叉膦酸(ATMP)作为螯合剂,消除海水对菱铁矿浮选的不利影响。微浮选试验结果表明,在淡水中,以煤油为捕收剂时,捕收率较高,但在海水中,当pH > 9.5时,捕收率明显下降。在海水中的主要离子中,镁离子和钙离子的有害作用最大。加入ATMP后,镁铝石在海水中的可浮性得到恢复。Zeta电位分布和溶液化学计算结果表明,Mg(OH)2(s)(主要)和CaOH+(次要)正性组分与镁铝石表面的相互作用降低了镁铝石的可浮性。Mg(OH)2(s)和CaOH+中的镁/钙离子与ATMP中的离子化物种相互作用,生成ATMP-钙/镁络合物,导致钙镁石与ATMP-钙/镁络合物之间的静电排斥作用,使钙镁石恢复浮选。因此,ATMP可以作为一种合适的药剂,以改善在海水中的辉沸石浮选。
In this investigation, a chelating agent of amino trimethylene phosphonic acid (ATMP) was introduced to eliminate the adverse effect of seawater in molybdenite flotation. Microflotation results presented that high flotation recovery of molybdenite was achieved in freshwater using kerosene as the collector, but it was significantly decreased in the presence of seawater when pH > 9.5. Among the main ions in seawater, magnesium and calcium ions played a more detrimental role than others. After the addition of ATMP, molybdenite floatability can restore in seawater. Zeta potential distribution and solution chemistry calculation results illustrated that the decreased molybdenite floatability was attributed to the interaction of positive Mg(OH)2(s)(major) and CaOH+(minor) components with the molybdenite surface. The magnesium/calcium ions of positive components of Mg(OH)2(s)and CaOH+interacted with the ionized species of ATMP and then produced ATMP-calcium/magnesium complex, leading to the electrostatic repulsion between molybdenite and ATMP-calcium/magnesium complex that was restoring the molybdenite flotation. Hence, the ATMP can be utilized as an appropriate reagent to improve molybdenite flotation in seawater.
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