Hydrothermal Hydrolysis of Fe3+ to Produce Hematite in Fe2(SO4)3?ZnSO4?H2O System

doi:10.12034/j.issn.1009-606X.217277

Chin. J. Process Eng. ›› 2018, Vol. 18 ›› Issue (2): 361-368.DOI: 10.12034/j.issn.1009-606X.217277

• Process & Technology • Previous Articles Next Articles

Hydrothermal Hydrolysis of Fe3+ to Produce Hematite in Fe2(SO4)3?ZnSO4?H2O System

Shuowen YI, Cunxiong LI^*, Chang WEI, Zhigan DENG, Xingbin LI, Yizhao WANG, Yuxuan SONG, Yaning HUANG

Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China

Received:2017-07-17 Revised:2017-08-30 Online:2018-04-22 Published:2018-04-10
Contact: Cun-Xiong cunLi licunxiong@126.com

Fe2(SO4)3-ZnSO4-H2O体系中Fe3+水热水解赤铁矿

易烁文，李存兄*，魏昶，邓志敢，李兴彬，王益昭，宋宇轩，黄亚宁

昆明理工大学冶金与能源工程学院，云南昆明 650093

通讯作者: 李存兄 licunxiong@126.com
基金资助:
湿法炼锌高铁溶液水热沉铁及铁资源化利用基础研究;湿法冶金含砷铁废水水热矿物化沉砷及砷物相转变机制研究;压力场下高硅氧化锌矿高温酸转化及硅沉淀机理研究;湿法炼锌浸出渣与高铁锌精矿协同浸出及相互作用机理研究;湿法炼锌高铁溶液水热沉铁及铁资源化利用应用基础研究

Abstract

Abstract: The effects of reaction temperature, retention time, initial Fe3+ concentration, Zn2+ concentration and hematite seed addition on iron removal rate, phase and chemical composition of hematite precipitates by hydrothermal hydrolysis of Fe3+ in Fe2(SO4)3?ZnSO4? H2O system were studied. The results showed that the increasing of temperature, retention time and Zn2+ concentration, and the decreasing of initial Fe3+ concentration have a positive effects on the iron removal rate and high-quality hematite precipitate obtaining. The presence of hematite seeds ed the formation of hematite nucleation and affected their composition. The iron removal rate was 97.1% and hematite precipitate contained 64.73% Fe, 1.41% S, and 0.2% Zn under the conditions of temperature of 200℃, retention time of 4 h, stirring speed of 400 r/min, initial Fe3+ concentration of 15 g/L and Zn2+ concentration of 80 g/L.

Key words: Fe2(SO4)3-ZnSO4-H2O system, hydrothermal hydrolysis of Fe3+, hematite, conversion of carphosiderite, sulfur content

摘要： 研究了Fe2(SO4)3?ZnSO4?H2O体系中Fe3+水热水解赤铁矿过程中反应温度、时间、初始Fe3+浓度、Zn2+浓度、晶种用量等对除铁率、赤铁矿沉铁渣物相组成及化学组成的影响规律. 结果表明，升高反应温度、延长反应时间、降低初始Fe3+浓度、增加Zn2+浓度有利于提高除铁率和赤铁矿渣的品质，添加晶种有助于赤铁矿形核并提高赤铁矿纯度. 在反应温度200℃、反应时间4 h、初始Fe3+浓度15 g/L及Zn2+浓度80 g/L、搅拌转速400 r/min的条件下，除铁率可达97.1%，获得了以赤铁矿为主要物相的沉铁渣，其含铁64.73%，含杂质硫1.41%，锌入渣率约为0.2%.

关键词: Fe2(SO4)3-ZnSO4-H2O系, Fe3+水热水解, 赤铁矿, 铁矾转变, 硫含量

Shuowen YI Cunxiong LI Chang WEI Zhigan DENG Xingbin LI Yizhao WANG Yuxuan SONG Yaning HUANG. Hydrothermal Hydrolysis of Fe3+ to Produce Hematite in Fe2(SO4)3?ZnSO4?H2O System[J]. Chin. J. Process Eng., 2018, 18(2): 361-368.

易烁文李存兄魏昶邓志敢李兴彬王益昭宋宇轩黄亚宁. Fe2(SO4)3-ZnSO4-H2O体系中Fe3+水热水解赤铁矿[J]. 过程工程学报, 2018, 18(2): 361-368.

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Hydrothermal Hydrolysis of Fe3+ to Produce Hematite in Fe2(SO4)3?ZnSO4?H2O System

Fe2(SO4)3-ZnSO4-H2O体系中Fe3+水热水解赤铁矿

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