Research progress on comprehensive utilization of flue gas desulfurization gypsum and gypsum slag in smelting industry

被引：0
|
作者：
Pan Z.-C. [1 ]
Jiao F. [1 ]
Qin W.-Q. [1 ]
Zhang T.-F. [1 ]
Ruan B.-W. [1 ]
机构：
[1] School of Minerals Processing and Bioengineering, Central South University, Changsha
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2022年 / 32卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Comprehensive utilization; Flue gas desulfurization gypsum; Gypsum slag; Harmless disposal; Neutralization sludge; Sewage acid neutralizing residue;
D O I：
10.11817/j.ysxb.1004.0609.2021-36670
中图分类号：
学科分类号：
摘要：
The flue gas desulfurization process of coal-fired power plants and the neutralization process of smelting acid wastewater are accompanied by the generation of solid waste with calcium sulfate dihydrate as the main component. The former is called flue gas desulfurization gypsum (FGDG), whereas the latter is usually termed as gypsum slag. FGDG has been used in various ways, such as in building materials, production of chemical raw materials, carbon dioxide sequestration, environmental treatment, and soil remediation. Gypsum slag is difficult to use because it contains arsenic, copper, lead, chromium, and other harmful elements. The usual treatment methods are solidification/stabilization treatment, high-temperature melting treatment, recovery of valuable metals, and the use of slagging agents. Combined with the latest research results on their comprehensive treatment, the utilization status of FGDG and gypsum slag was comprehensively described. This paper analyzed the advantages and disadvantages of disposal and utilization technology, discussed several problems and deficiencies existing in their application, and put forward suggestions. Future research should focus on FGDG minimization, expansion of the high-value utilization scale, and development of high value-added products to improve the comprehensive utilization rate. The technologies of harmless and resource utilization of gypsum slag, such as calcium-sulfate crystal regulation, pyrometallurgical wet synergistic treatment, and the use of slagging agents, are the future development directions. © 2022, China Science Publishing & Media Ltd. All right reserved.
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页码：1391 / 1402
页数：11
相关论文
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