Research progress and prospect of dezincing process of iron and steel dust and mud
ZHANG Yuzhu1,2, KOU Xinlin1,2, TIAN Tielei1,2, LONG Yue1,2, JIN Xinyu1,2, YANG Jiayi1,2
1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China; 2. Hebei Key Laboratory of Modern Metallurgical Technology, Tangshan 063009, Hebei, China
Abstract：With the aggravation of environmental pollution and the shortage of zinc resources, the iron and steel industry pays more and more attention to the treatment of dust and mud. In order to efficiently utilize resources and reduce environmental pollution, researchers have developed a variety of processes to recover zinc metal from iron and steel dust and mud. The source and chemical composition of iron and steel dust and mud are explored, the process flow and characteristics of physical method, wet method, fire method, microwave method, chloride method and plasma method are described, and their advantages and disadvantages are analyzed from the reduction efficiency, energy consumption and other aspects. The results show that the physical method is simple and suitable for the pretreatment of fire and wet dezinc process. The selective leaching ability of wet process is strong, but the solvent corrodes the equipment seriously and it is difficult to remove impurities later. Pyrotechnics are widely used, but energy consumption and pollution are the main limiting factors. Microwave, chloride and plasma methods, as emerging technologies, have superior dezincing performance compared with traditional processes, but there are also some problems in practical application that need to be further improved. Finally, in order to respond to the policy of "carbon peak, carbon neutral", this paper proposes the hydrocarbon-coupled reduction dezinc process according to the excellent environmental performance of the hydrogen metallurgy process and the mature and stable rotary hearth furnace process, which can effectively reduce carbon dioxide emissions in the steel industry, reduce energy consumption, and improve the metallization rate of rotary hearth furnace process. It is hoped that the above work can provide valuable reference for the development of the process of removing zinc from iron and steel dust and mud.
张玉柱, 寇鑫林, 田铁磊, 龙跃, 靳鑫玉, 杨佳毅. 钢铁尘泥脱锌工艺的研究进展与展望[J]. 钢铁, 2023, 58(6): 1-11.
ZHANG Yuzhu, KOU Xinlin, TIAN Tielei, LONG Yue, JIN Xinyu, YANG Jiayi. Research progress and prospect of dezincing process of iron and steel dust and mud[J]. Iron and Steel, 2023, 58(6): 1-11.
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