摘要
采用“跳汰机分选—感应炉重熔”的工艺回收铬铁渣中夹杂的合金,实现了铬铁渣中夹杂合金的回收再利用,考察了分级跳汰对夹杂合金回收效果的影响,建立了针对跳汰回收的合金颗粒的重熔制度,分析了重熔工序对产品成分的影响以及坩埚受侵蚀的情况.结果表明:采用分级跳汰能够全部回收粒度为10~20 mm的铬铁颗粒,且能有效回收粒度小于10 mm的夹杂合金;每炉次出铁80%、余留20%的“留铁法”能有效推进铬铁颗粒的熔化进度;浇铸产品的成分随炉次增加而逐渐稳定,第4炉次产品中Cr的质量分数为51.13%,C的质量分数为6.42%,达到了普通高碳铬铁的标准;重熔过程中发生炉渣和合金液侵蚀、渗透坩埚的现象,侵蚀产物(镁铝铬尖晶石)对炉衬具有一定的保护作用.
The process of“jig sorting-induction furnace remelting”was adopted to recover the alloys inclusions in the ferrochrome slag,which realized the recovery and reuse of the inclusion alloys in ferrochrome slag.The influence of staged jigging on the recovery effect of inclusion alloy was investigated,and the remelting process of alloy particles recovered by jigging was established,then the influence of remelting process on product composition and corroded crucible were analyzed.The results showed that the ferrochromium particles with a particle size of 10~20 mm could be completely recovered by the use of jigging,and staged jigging could effectively recover inclusion alloys with a particle size of less than 10 mm.The“iron retention method”(80%poured out,20%retained)could effectively promote the melting progress of ferrochromium particles,and the composition of the cast product gradually stabilized as the experiment proceeded.The mass fraction of Cr and C in the fourth furnace time product was 51.13%and 6.42%,which reached the standard of ordinary high carbon ferrochrome.During the remelting process,slag and alloy liquid corroded and penetrated the crucible,and the corrosion product(Mg-Al-Cr spinel)had a certain protective effect on the furnace lining.
作者
姚智
曲扬
罗洪杰
孙旭
厉建中
龚晓俅
Yao Zhi;Qu Yang;Luo Hongjie;Sun Xu;Li Jianzhong;Gong Xiaoqiu(Engineering Research Center of Advanced Materials Preparing Technology(Ministry of Education),Northeastern University,Shenyang 110819,China;Hongyang Technology,Xuzhou 221600,China)
出处
《材料与冶金学报》
CAS
北大核心
2022年第6期402-407,共6页
Journal of Materials and Metallurgy
基金
徐州沛县科技项目(P20193)。
关键词
铬铁渣
分级跳汰
夹杂合金
重熔
电磁搅拌
侵蚀
ferrochrome slag
graded jigging
inclusion alloy
remelting
electromagnetic stirring
corrosion
