文献类型：期刊文献

英文题名：Study on the Effect of Calcium Alloy on Arsenic Removal from Scrap-Based Steel Production

作者：Yao, Hanjie Zhuang, Changling Li, Changrong Xiang, Song Li, Xiang Yang, Guangkai Zhang, Zezhong

第一作者：Yao, Hanjie

通信作者：Zhuang, CL[1];Zhuang, CL[2]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;[2]Key Lab Met Engn & Proc Energy Saving Guizhou Prov, Guiyang 550025, Peoples R China;[3]Guizhou Inst Technol, Coll Mat & Met Engn, Guiyang 550025, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;corresponding author), Key Lab Met Engn & Proc Energy Saving Guizhou Prov, Guiyang 550025, Peoples R China.

年份：2023

卷号：16

期号：8

外文期刊名：MATERIALS

收录：;EI(收录号：20231814052894);Scopus(收录号：2-s2.0-85156169965);WOS:【SCI-EXPANDED(收录号:WOS:000980874600001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 52164032), Science and Technology Program of the Guizhou Province ([2019] 2163). The authors hereby thank Li Zhiying for her contribution in improving the manuscript.

语种：英文

外文关键词：arsenic removal; calcium alloy; inclusion; arsenic removal agent

摘要：Scrap steel is a kind of resource that can be recycled indefinitely. However, the enrichment of arsenic in the recycling process will seriously affect the performance of the product, making the recycling process unsustainable. In this study, the removal of arsenic from molten steel using calcium alloys was investigated experimentally, and the underlying mechanism was explored based on thermodynamic principles. The results show that the addition of calcium alloy is an effective means of reducing the arsenic content in molten steel, with the highest removal percentage of 56.36% observed with calcium aluminum alloy. A thermodynamic analysis revealed that the critical calcium content required for arsenic removal reaction is 0.0037%. Moreover, ultra-low levels of oxygen and sulfur were found to be crucial in achieving a good arsenic removal effect. When the arsenic removal reaction occurs in molten steel, the oxygen and sulfur concentrations in equilibrium with calcium were wO=0.0012% and wS=0.00548%, respectively. After successful arsenic removal, the arsenic removal product of the calcium alloy is Ca3As2, which usually does not appear alone. Instead, it is prone to combining with alumina, calcium oxide, and other inclusions to form composite inclusions, which is beneficial for the floating removal of inclusions and the purification of scrap steel in molten steel.