Recovery of chromium from chromium-bearing slags produced in the stainless-steel smelting: A review
Recovery of chromium from chromium-bearing slags produced in the stainless-steel smelting: A review
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从不锈钢冶炼产生的含铬渣中回收铬：综述
DOI：
10.1016/j.jclepro.2021.126467
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发表时间：
2021
影响因子：
11.1
通讯作者：
Tao Jiang
中科院分区：
文献类型：
--
作者：
Foquan Gu;Yuanbo Zhang;Zijian Su;Yikang Tu;Shuo Liu;Tao Jiang
不锈钢冶炼过程中产生的铬渣是重要的可回收二次资源。从这些渣中回收铬不仅有利于提高渣的经济潜力，而且有利于解决渣中铬（VI）引起的环境问题。综述了从含铬高炉渣中回收铬的工艺技术。开始，分析了世界铬资源和消费情况。介绍了SSS渣的物理化学特性，并对目前常用的和新开发的几种从SSS渣中回收铬的方法进行了深入的讨论，包括物理分离法、熔融还原法、热等离子体法、碱性焙烧-水浸法、碱性浸出法和生物浸出法。特别关注的是从SSS渣中回收铬的技术挑战，以及通过提高处理效率来提高铬回收率的可能措施。
Chromium-bearing slags produced during the stainless-steel smelting (SSS) are important recyclable secondary resources. Recovery of chromium from these slags is not only beneficial to increase the slag’s economic potential but also favorable to solve the environmental problems induced by the chromium (VI) in the slags. This study aims to review the technologies for recovering chromium from the chromium-containing SSS slags. To begin with, chromium resources and consumption around the world were analyzed. Then, the physicochemical characteristics of the SSS slags were provided, followed by a deep discussion on varieties of the normal and lately developed methods for recovering chromium from the slags, including physical separation, smelting reduction, thermal plasma, alkaline roasting-water leaching, alkaline leaching, and bioleaching processes. Specific attention was paid to the technical challenge appearing in the recovery of chromium from the SSS slags and to the possible measures for enhancing the chromium recovery by promoting the processing efficiency.