MICROSTRUCTURES AND MICROWAVE-ABSORBING PROPERTIES OF ZnO SMOKE FROM ZINC LEACH RESIDUE TREATED By CARBOTHERMAL REDUCTION

doi:10.24425/amm.2021.136437

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	MICROSTRUCTURES AND MICROWAVE-ABSORBING PROPERTIES OF ZnO SMOKE FROM ZINC LEACH RESIDUE TREATED By CARBOTHERMAL REDUCTION
	Ma, Zhiwei; Wang, Sheng; Du, Xueyan; Zhang, Ji; Zhao, Ruifeng; Zhang, Shengquan
刊名	ARCHIVES OF METALLURGY AND MATERIALS
	2021
卷号	66 期号:4 页码:1163-1170
关键词	Zinc leach residue Carbothermal reduction ZnO smoke Microwave-absorbing properties
ISSN号	1733-3490
DOI	10.24425/amm.2021.136437
英文摘要	Much zinc residue is produced during the traditional processes involved in zinc hydrometallurgy in the leaching stage: its composition is complex and valuable metals are difficult to recover therefrom. If not handled properly, it can lead to a waste of resources and environmental pollution. To solve this problem, zinc leach residue specimens were treated using the carbothermal reduction method (CTR) that is easy to operate and has a high energy utilisation rate. The methods, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and scanning transmission electron microscopy (STEM) were used for analytical characterisation. Based on this, this research investigated a structure-function relationship between microstructures and microwave-absorbing properties of ZnO smoke from CTR-treated zinc leach residue. The results demonstrate that microstructures and macro-properties of ZnO smoke obtained at different temperatures differ greatly. Under conditions including a calcination temperature of 1250 degrees C, holding time of 60 min, and addition of 50% and 10% of powdered coal and CaO separately, the ZnO content in the obtained smoke is 99.14%, with regular micron-sized ZnO particles therein. For these particles, the minimum reflection loss (RLmin) reached -25.56 dB at a frequency of 15.84 GHz with a matching thickness of 5 mm. Moreover, frequency bandwidth corresponding to RL < -10 dB can reach 2.0 GHz. ZnO smoke obtained using this method is found to have excellent microwave-absorbing performance, which provides a new idea for high-value applications of zinc-rich residue.
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	POLSKA AKAD NAUK, POLISH ACAD SCIENCES, INST METALL & MATER SCI PAS
WOS记录号	WOS:000739837400001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155023]
专题	研究生院材料科学与工程学院
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Ma, Zhiwei,Wang, Sheng,Du, Xueyan,et al. MICROSTRUCTURES AND MICROWAVE-ABSORBING PROPERTIES OF ZnO SMOKE FROM ZINC LEACH RESIDUE TREATED By CARBOTHERMAL REDUCTION[J]. ARCHIVES OF METALLURGY AND MATERIALS,2021,66(4):1163-1170.
APA	Ma, Zhiwei,Wang, Sheng,Du, Xueyan,Zhang, Ji,Zhao, Ruifeng,&Zhang, Shengquan.(2021).MICROSTRUCTURES AND MICROWAVE-ABSORBING PROPERTIES OF ZnO SMOKE FROM ZINC LEACH RESIDUE TREATED By CARBOTHERMAL REDUCTION.ARCHIVES OF METALLURGY AND MATERIALS,66(4),1163-1170.
MLA	Ma, Zhiwei,et al."MICROSTRUCTURES AND MICROWAVE-ABSORBING PROPERTIES OF ZnO SMOKE FROM ZINC LEACH RESIDUE TREATED By CARBOTHERMAL REDUCTION".ARCHIVES OF METALLURGY AND MATERIALS 66.4(2021):1163-1170.