Inorganic Chemicals Industry >
Study on high-value utilization of zinc oxide powder in rotary hearth furnace
Received date: 2022-06-13
Online published: 2022-12-19
Aiming at the problem of low added value of zinc oxide powder in rotary hearth furnace，the zinc oxide powder in rotary hearth furnace was taken as the research object，and the choline chloride-oxalic acid dihydrate（CC-OA） deep eutectic solvent was used as the research system.The selective solubility of deep eutectic solvent was used to purify zinc oxide powder and prepare nano-zinc oxide，and the kinetics of nano-zinc oxide grain growth was studied.The optimal solution for zinc oxide powder washing treatment was that the washing temperature was 50 °C，the washing time was 3 min，and the liquid-solid ratio was 3 mL/g.The precursor obtained by treating zinc oxide powder with deep eutectic solvent was ZnC2O4·2H2O.According to the phenomenological equation，the relationship between roasting temperature，roasting time and particle size was calculated，and the preparation of nano-zinc oxide with specific particle size was realized.Under the conditions of calcination temperature of 400 ℃ and calcination time of 2 h，the content of zinc oxide could reach 99.768%.The morphology was relatively uniform and spherical，and the average particle size was 28.5 nm and the particle size was mainly distributed between 10~100 nm.
Haiwei YAO , Rui MAO , Fei WANG , Zuoqiao ZHU . Study on high-value utilization of zinc oxide powder in rotary hearth furnace[J]. Inorganic Chemicals Industry, 2022 , 54(12) : 119 -125 . DOI: 10.19964/j.issn.1006-4990.2022-0263
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