Kinetic model of chromium release from argon oxygen decarburisation(AOD)slag in a neutral leachate
作者机构：School of Metallurgy and EnergyNorth China University of Science and TechnologyTangshan 063200HebeiChina
出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)
年 卷 期：2020年第27卷第11期
页 面：1303-1310页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：the National Natural Science Foundation of China(Nos.51704119 and 51574108) Natural Science Foundation of Hebei Province of China(No.E2017209243) Tangshan Municipal Project of Science and Technology(No.19150201E) School Funds for Distinguished Young Scientists(No.JQ201714)
主 题：Kinetic model Chromium release Shrinking core model-AOD slag
摘 要：Valorisation of argon oxygen decarburisation(AOD)slag,a suitable recycling resource,is limited by the release of a notable amount of heavy metals,such as *** mineralogical component of AOD slag was characterised by X-ray diffraction and scanning electron microscopy-energy-dispersive X-ray *** explore the release kinetics of chromium from AOD slag,neutral leaching tests were performed at various *** results indicated the existence of two leaching stages:quick and slow leaching *** 2 h,the chromium release fraction increased sharply as the leaching time *** the leaching time in creased,the chromium release rate gradually *** on the shrinking core model,chromium release kinetic models for the quick and slow leaching stages from the AOD slag were independently *** chromium release was controlled by solid product diffusion during the quick leaching stage and a complicated process in the slow leaching *** activation energy of chromium leaching was calculated based on the Arrhenius *** product diffusion was the velocity-determining step during the 2 h leaching *** the slow leaching stage,chromium release was controlled by complicated hybrid control dominated by solid product diffusion.
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