摘要
电解铝废旧SiC-Si3N4含有一定量的氟化钠、AlN等低熔点物质,不经提纯难以循环利用。在研究废旧SiC-Si3N4主要物化性质、浸蚀机理的基础上,主要研究了影响其提纯效果的酸浸条件。通过水浸—酸浸联合工艺得到了纯度96.45%的SiCSi3N4,Na、F浸出率分别达到了91.89%、97.80%。通过分析提纯后SiC-Si3N4的化学成分、耐火性能、物相组成等,明确提纯后SiC-Si3N4可以降级循环使用。
The waste SiC-Si3N4 from electrolytic aluminum process contains many low melting-point substances such as NaF and AlN,and it is difficult to recycle without purification.On the basis of studing the main physicochemical properties and erosion mechanism of waste SiC-Si3N4,the acid leaching conditions affecting the purification were studied.With combined process of water and acid leaching,the purity of SiC-Si3N4 was 96.45%and the leaching rates of Na and F were 91.89%and 97.80%,respectively.By analyzing the chemical composition,phase composition and refractory performance of the purified SiC-Si3N4,it is concluded that the purified SiC-Si3N4 can be recycled with lower quality grade.
作者
刘朋
申士富
刘海营
骆有发
王金玲
李克阳
陈永健
钱志博
LIU Peng;SHEN Shi-fu;LIU Hai-ying;LUO You-fa;WANG Jin-ling;LI Ke-yang;CHEN Yong-ian;QIAN Zhi-bo(Binzhou Hongtong Comprehensive Utilization of Resources Co.Ltd.,Binzhou 256200,Shandong,China;State Key Laboratory of Mineral Processing,Beijing 100160,China;BGRIMM Technology Group,Beijing 100160,China)
出处
《矿冶》
CAS
2020年第6期45-50,共6页
Mining And Metallurgy
基金
国家重点研发计划项目(2018YFC1901904)
山东省重点研发计划重大科技创新工程项目(2019JZZY010413)
矿冶科技集团有限公司科研基金重大项目(YJZ201724)。
