Effects of slag composition and additive type on desulfurization of rejected electrolytic manganese metal scrap by Na2O-containing electroslag
作者机构：The State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhan430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of EducationWuhan University of Science and TechnologyWuhan430081HubeiChina Hubei Rising Technology Co.Ltd.Huangshi435000HubeiChina
出 版 物：《Journal of Iron and Steel Research International》
年 卷 期：2021年第28卷第12期
页 面：1515-1529页
核心收录：
学科分类：080602[工学-钢铁冶金] 0806[工学-冶金工程] 08[工学]
主 题：Rejected electrolytic manganese metal Desulfurization Deoxidization Additive Na2O content Thermodynamic
摘 要：The recycling rate of rejected electrolytic manganese metal(EMM)scrap can be increased by inhibiting the manganese metal(MM)vaporization during the remelting process with ***,if the latter is achieved by reducing the remelting temperature,the desulfurization behavior will ***,Na_(2)O-containing electroslag and metallic additive were used to increase the rejected EMM scrap recovery *** respective high-temperature experiment was conducted in a MoSi_(2) electrical resistance furnace filled with fluid argon at 1673 K using five different types of electroslag with the Na_(2)O content ranging from 5.81%to 15.71%.High-purity metallic magnesium and magnesium calcium alloy additives were used as *** addition of Na_(2)O and metallic additives effectively promoted the desulfurization and deoxidization of *** removal of sulfur and oxygen by the interaction between Na_(2)O-containing electroslag melt and molten MM with metallic additive was analyzed from the thermodynamic and kinetic *** effect of Na_(2)O-containing electroslag volatilization on desulfurization and deoxidization was *** an increase in Na_(2)O content in the slag,the mass loss rates of Na_(2)O and electroslag rose,as well as the final sulfur partition *** the Na_(2)O content volatilized in the slag melt did not exceed 10.44%,the sulfur removal ratio was increased by high sulfide capacity and CaO activity in all slags due to the addition of Na_(2)*** rejected EMM scrap deoxidization ratio grew with the increased activity of CaO and reduced activity of Al_(2)O_(3) in the molten slag,caused by the increased Na_(2)O content in the molten *** addition of metallic Mg and Mg-Ca alloy indirectly promoted desulfurization and deoxidization by reducing the MnO content in the rejected EMM scrap and growing slag *** Mg-Ca alloy could also react with dissolved sulfur and oxygen,directly promoting desulfurization and deoxidiza
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