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矿冶:2023,32(6):-
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国外某高硫低锌尾矿锌强化回收试验研究
(1.昆明理工大学 国土资源工程学院;2.中铝秘鲁矿业公司,秘鲁)
Experimental study on enhanced recovery of zinc from a high sulfur and low zinc tailings abroad
LI Da1, LIU Jian1, YANG Dong2, YU XiaoGuan2, DAI Longfu1, HAO Jiamei1, QIN Xiaoyan1, GAO Hulin1,3,2,4,3
(1.School of Land and Resources Engineering,Kunming University of Technology;2.Mineral Chinalco Peru SA,Peru;3.Yunnan;4.Key Laboratory of Green Separation and Enrichment of Strategic Metallic Mineral Resources in Yunnan Province)
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投稿时间:2023-06-30    修订日期:2023-07-14
中文摘要: 国外某高硫低锌尾矿中含锌2.69%,含硫47.08%,脉石矿物主要为滑石并且含有大量黄铁矿,硫含量过高是导致该矿石浮选指标差的主要原因。实验室通过条件试验指出石灰用量不足、硫酸铜用量过大导致现场精矿Zn品位低,并通过调整药剂用量、使用组合捕收剂以及添加黄铁矿辅助抑制剂Kg-1显著提高了精矿Zn品位。在最佳药剂制度下,采用一粗三精一扫,中矿按顺序返回的闭路流程,其中扫选不添加石灰,其他药剂减半,三次精选均添加石灰500 g/t调节矿浆pH,最终试验获得的闭路锌精矿产品中Zn品位为42.86%、Zn回收率为71.93%,达到选厂要求浮选指标,实现了对该高硫低锌尾矿锌的高效回收利用。通过闭路试验探究有无Kg-1的添加对闭路锌精矿Zn品位的影响,试验结果指出Kg-1的引入能有效阻碍浮选过程中黄铁矿的上浮,显著提高锌精矿Zn品位,相对于未加Kg-1的闭路试验结果锌精矿Zn品位提升13.76%,说明Kg-1是一种有效的黄铁矿抑制剂。Kg-1抑制黄铁矿作用机理为通过与被硫酸铜活化的黄铁矿表面的Cu2+Fe2+形成不溶性络合物,阻碍捕收剂在黄铁矿表面的吸附。
Abstract:A foreign high-sulfur and low-zinc tailings contains 2.69 % zinc and 47.08 % sulfur. The gangue minerals are mainly talc and contain a large amount of pyrite. The high sulfur content is the main reason for the poor flotation index of the ore. Through conditional tests in the laboratory, it is pointed out that insufficient lime dosage and excessive copper sulfate dosage lead to low Zn grade of concentrate in the field. The Zn grade of concentrate is significantly improved by adjusting the dosage of reagent, using combined collector and adding pyrite auxiliary inhibitor Kg-1. Under the optimal reagent system, a closed-circuit process of one roughing, three cleaning and one scavenging was adopted, and the middle ore was returned in sequence. Among them, lime was not added in the scavenging process, and other reagents were halved. Lime 500 g/t was added in the three cleaning processes to adjust the pH of the pulp. The final closed-circuit zinc concentrate product obtained in the test had a Zn grade of 42.86 % and a Zn recovery rate of 71.93 %, which met the flotation index required by the concentrator, and realized the efficient recovery and utilization of zinc from the high-sulfur and low-zinc tailings. The effect of Kg-1 addition on the Zn grade of closed-circuit zinc concentrate was investigated by closed-circuit test. The test results showed that the introduction of Kg-1 could effectively hinder the flotation of pyrite in the flotation process and significantly improve the Zn grade of zinc concentrate. Compared with the closed-circuit test results without Kg-1, the Zn grade of zinc concentrate increased by 13.76 %, indicating that Kg-1 is an effective pyrite inhibitor. The mechanism of Kg-1 inhibiting pyrite is to form insoluble complexes with Cu2+ and Fe2+ on the surface of pyrite activated by copper sulfate, which hinders the adsorption of collector on the surface of pyrite.
文章编号:20230630001     中图分类号:TD952    文献标志码:
基金项目:国家自然科学基金(52174251)
引用文本:
李 达,刘 建,杨东,余晓光,代龙富,郝佳美,秦晓艳,高虎林.国外某高硫低锌尾矿锌强化回收试验研究[J].矿冶,2023,32(6):.

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