化工进展2023，Vol.42Issue(11)：6005-6014,10.DOI:10.16085/j.issn.1000-6613.2022-2308
Fe3+-C2O42--H2O溶液中Fe(Ⅲ)的形态分布及其在硫酸烧渣和氰化尾渣除铁过程中的应用
Species distribution of Fe(Ⅲ)in Fe3+-C2O42--H2O solution and application in the process of iron removal from sulphuric acid cinder and syanide tailings
摘要
Abstract
Aiming at the problems of selective iron removal from sulfuric acid cinder and cyanide tailings,the technology of iron removal and the valuable metals enrichment such as gold and silver by oxalic acid and ammonium oxalate was proposed.The species distribution diagrams of Fe(Ⅲ)and C2O42-in Fe3+-C2O42--H2O solution were drawn.The relationships between Fe(Ⅲ)species distribution and the pH,the molar concentration ratio of[C2O42-]TOT to[Fe3+]TOT and the liquid to solid ratio were analyzed.The relationship between the leaching effect of hematite and the species distribution of Fe(Ⅲ)in the leaching solution was revealed and the technologies of resource utilization of the leaching solution were also discussed.Results showed that the pH and the molar concentration ratio of[C2O42-]TOT to[Fe3+]TOT were the main factors affecting the species distribution of Fe(Ⅲ),and its species distribution in the leaching solution determined the leaching effect and the leaching time of hematite.In order to shorten the iron removal time and improve leaching effect,the molar ratio of[C2O42-]TOT to[Fe3+]TOT should be higher than 3,and the pH should be controlled near the minimum pH when the Fe(C2O4)33-distribution fraction reached 1.The iron removal technology of oxalate and ammonium oxalate had a short time and a good iron removal effect,and it was beneficial to concentrate gold,silver and metal sulfide as well as the resource utilization of the leaching solution.The research results would provide the theoretical and technical support for efficient,clean and resource utilization of these industrial solid wastes containing gold and hematite,which were produced in gold smelting industry and synthetic sulfuric acid industry.关键词
硫酸烧渣/氰化尾渣/选择性/浸出/溶解性/形态分布Key words
sulphuric acid cinder/cyanide tailings/selectivity/leach/solubility/species distribution分类
矿业与冶金引用本文复制引用
党晓娥,张婷..Fe3+-C2O42--H2O溶液中Fe(Ⅲ)的形态分布及其在硫酸烧渣和氰化尾渣除铁过程中的应用[J].化工进展,2023,42(11):6005-6014,10.基金项目
国家自然科学基金(51974221). （51974221）
