Effects of type and dosages of organic depressants on pyrite floatability in microflotation system
Effects of type and dosages of organic depressants on pyrite floatability in microflotation system
复制标题
DOI：
10.1016/j.apt.2018.08.015
复制
发表时间：
2018-12-01
影响因子：
5.2
通讯作者：
Abdollahi, Hadi
中科院分区：
文献类型：
--
作者：
Ahmadi, Mehran;Gharabaghi, Mahdi;Abdollahi, Hadi
黄铁矿是硫化矿与煤浮选过程中的干扰矿物，为防止黄铁矿浮选，可采用无机、有机和生物抑制剂。主要的有机黄铁矿抑制剂有淀粉、糊精、瓜尔胶、羧甲基纤维素（CMC）、乙二胺四乙酸（EDTA）、二乙烯三胺（DETA）等。本文采用改进的Halimond管进行浮选试验。首先进行了浮选试验，以获得最佳的黄铁矿浮选条件（合适的捕收剂和起泡剂以获得最大的回收率）。在最佳条件下（捕收剂：KAX + KIPX，16 ppm;捕收剂作用时间：4 min;起泡剂：聚丙二醇（A65），20 ppm;起泡剂作用时间：30 s），黄铁矿回收率提高到95.63%。进行了黄铁矿浮选动力学实验，并对各种动力学模型进行了评价。结果表明，黄铁矿的浮选动力学为二级动力学。在获得最佳浮选条件和动力学研究的基础上，综合考察了淀粉、糊精、瓜尔胶、羧甲基纤维素、EDTA和DETA三种有机抑制剂在中性pH值下的浓度（50、100、150 ppm）对浮选效果的影响。实验结果表明，DETA可使150 ppm的黄铁矿回收率显著降低44%。(C)2018年日本粉末技术学会。由Elsevier B. V.和日本粉末技术协会出版。All rights reserved.
Pyrite is considered as a disturbing sulfide mineral in the beneficiation of sulfide minerals and coal and in order to prevent floating of pyrite in the flotation, different inorganic, organic and biological depressants could be used. The most important organic pyrite depressants are starch, dextrin, guargum, carboxymethyl cellulose (CMC), ethylene diamine tetra acetic acid (EDTA), Diethylenetriamine (DETA). In this paper, flotation experiments were carried out by modified Halimond tube. At first, flotation experiments were performed to obtain optimal pyrite flotation condition (suitable collector and frother for maximum recovery). In optimal condition (collector: KAX + KIPX, 16 ppm; collector condition time: 4 min; frother: Poly Propylene Glycol (A65), 20 ppm; frother condition time: 30 s), pyrite recovery increased to 95.63%. Flotation kinetics experiments were performed and various kinetic models were evaluated on pyrite flotation. The results showed that flotation kinetics of pyrite is second-order. After obtaining optimal condition for flotation and kinetic studies, the effects of type and dosage of different organic depressants including starch, dextrin, guargum, carboxymethyl cellulose, EDTA and DETA at three concentrations (50, 100, 150 ppm) at neutral pH were comprehensively investigated. The results of the experiments showed that DETA can significantly reduce the recovery of pyrite at 150 ppm by 44%. (C) 2018 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.