矿产综合利用2025，Vol.46Issue(2)：93-101,9.DOI:10.3969/j.issn.1000-6532.2025.02.014
碱浸体系中氧化剂对砷黄铁矿的选择性溶解及机理研究
Selective Dissolution and Mechanism of Arsenopyrite by the Oxidizing Agent in Alkaline Leaching System
摘要
Abstract
Arsenopyrite is a common gold-bearing mineral,and the presence of arsenic leads to difficulties in gold recovery.In this paper,the effects of leaching time,NaOH concentration,temperature and potassium permanganate concentration on the arsenic leaching rate in the process of arsenopyrite arsenic removal by atmospheric pressure alkaline leaching were investigated,and the leaching mechanism of potassium permanganate was elucidated by combining electrochemical and kinetic analysis.The results showed that the highest arsenic leaching rate of 63.72%was achieved when 0.25 mol/L potassium permanganate was used as the oxidant and the NaOH concentration was 3.5 mol/L.Electrochemical and kinetic analyses showed that the decisive step controlling the rate of arsenopyrite atmospheric pressure alkali leaching reaction was the chemical reaction step.The apparent activation energy of the reaction is 40.19 kJ/mol.Oxidizing agents such as potassium permanganate promote the oxidative dissolution of iron at the beginning of the alkaline leaching of arsenopyrite.关键词
砷迁移/砷黄铁矿/浸出/预氧化Key words
Arsenic removal/Arsenopyrite/Dissolution/Pre-oxidation分类
矿业与冶金引用本文复制引用
金凯,袁文彬,王小龙,覃文庆,张雁生..碱浸体系中氧化剂对砷黄铁矿的选择性溶解及机理研究[J].矿产综合利用,2025,46(2):93-101,9.基金项目
国家自然科学基金的支持(51974363) （51974363）
