基于水热晶体转换的危险雅罗矿残留物的回收利用
Dongdong He1, Feng Jiang1, Xinzhuang Fu1
1School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China.
Waste management (New York, N.Y.)
|November 6, 2023
概括
雅罗矿残留物回收是通过一种新的一步热水处理来实现的. 该工艺将危险废物转化为有价值的血,适用于铁制造和颜料,同时回收其他金属.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 石 (MeFe3(SO4)2(OH) 6) 是一种含有有价值和有毒金属的危险的非铁炼渣.
- 在经济和环境方面,对石残留物的合理处理是一个迫切的全球性挑战.
- 目前用于石残留物管理的方法往往不足或昂贵.
研究的目的:
- 开发一种新的一步热水处理方法,以有效回收雅罗矿残留物.
- 为了将jarosite转化为宝贵的材料,如血.
- 为了回收有价值的金属组件,以便在水力金工艺中重复使用.
主要方法:
- 石残留物经过一阶段的水热处理,温度高于220°C.
- 使用XRD和TEM进行了相组合分析.
- 由此产生的血颗粒通过烤进一步加工.
主要成果:
- 在水热条件下,石完全转化为血石晶体颗粒.
- 贵金属如硫酸六水合物溶于水溶液中进行回收.
- 烤血含有高Fe (62.57%) 与低S (0.21%) 和As (0.04%),符合铁制造标准.
- 纳米尺寸的单晶血颗粒适合氧化铁红色素的生产.
结论:
- 一个阶段的热水处理,其次是减少烤,提供了一种有效的Jarosite残留回收方法.
- 这一过程使金属资源的经济回收成为可能,并解决了危险废物处理问题.
- 生产的血是铁制造的可行原料,也是高质量的颜料.
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