摘要
利用Fe(Ⅲ)的氧化性与锌精矿中硫所表现出来的还原性,可以实现锌精矿与锌浸出渣协同浸出。针对锌精矿在协同浸出过程中的溶解行为,在H_2SO_4-Fe_2(SO_4)_3体系下,考察了反应时间、矿物粒度、温度、初始硫酸浓度、初始Fe^(3+)浓度等因素对锌精矿溶解行为的影响,并对锌精矿溶解过程中锌、硫的转化行为进行了研究。X射线衍射(XRD)和扫描电子显微镜(SEM)分析结果表明,锌精矿在反应过程中不断分解,有价金属溶出;锌精矿中的硫主要被Fe^(3+)氧化为单质硫,并在矿物颗粒表面形成包裹层;反应后期,单质硫包裹层是限制锌精矿溶解的主要原因。
The synergistic leaching of zinc residue and zinc concentrate can be achieved by utilizing the oxidizability of Fe(Ⅲ) and reducibility of sulfur in the zinc concentrate. Aiming at the dissolution behavior of zinc concentrate in synergistic leaching process,the effects of reaction time, mineral particle size, temperature, the initial sulfuric acid concentration, and the initial Fe^3+ concentration and other factors on the dissolution behavior of zinc concentrate were investigated in H2SO4-Fe2(SO4)3 system, and the conversion behavior of zinc and sulfur during the dissolution of zinc concentrate was studied. XRD and SEM analysis show that the zinc concentrate is decomposed during the reaction process and a large number of valuable metals are dissolved. The sulphur in the zinc concentrate is mainly oxidized into elemental sulphur by Fe^3+ and a wrap layer is formed on the surface of the mineral particles. At the later stage of the reaction, the wrap layer of elemental sulfur is the main reason for limiting the dissolution of zinc concentrate.
作者
付中梦
邓志敢
魏昶
李兴彬
李存兄
樊刚
FU Zhongmeng;DENG Zhigan;WEI Chang;LI Xingbin;LI Cunxiong;FAN Gang(Faculty of Metallurgical and Energy Engineering,Kunming University of Scienceand Technology, Kunming 650093, China)
出处
《有色金属工程》
CAS
北大核心
2019年第1期48-55,共8页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(51564030
51664030)~~
关键词
锌精矿
还原
溶解行为
转化
zinc concentrate
reduction
dissolution behavior
conversion
