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

作　　者：Guanghua Ai Kaihua Huang Cheng Liu Siyuan Yang 

机构地区：[1]University of Science and Technology,Ganzhou 34100,China [2]South China Institute of Environmental science,Ministry of Ecology and Environment,Guangzhou 510530,China [3]School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China [4]State Key Laboratory of Mineral Processing,BGRIMM Technology Group,Beijing 102600,China

出　　处：《International Journal of Mining Science and Technology》2021年第6期1129-1134,共6页矿业科学技术学报（英文版）

基　　金：the support of the National Natural Science Foundation of China (No. 51874150);the Natural Science Foundation of Hubei Province of China (ZRMS2021000085);the Fundamental Research Funds for the Central Universities (2021IVA039);the Open Foundation of State Key Laboratory of Mineral Processing, BGRIMM Technology (No. BGRIMM-KJSKL2021-22)。

摘　　要：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.

关 键 词：MOLYBDENITE Seawater Calcium/magnesium ions ATMP FLOTATION 

分 类 号：TD854[矿业工程—金属矿开采] TD923[矿业工程—矿山开采]