摘要
以氰化尾渣为主要原料,配以膨润土、钠长石、CaCl2、煤粉等辅料,利用高温氯化焙烧方法制备了陶粒。采用XRD、SEM、XRF、TG/DTA、ICP-OES等研究了氰化尾渣的物相成分、微观结构等理化性能,测定了陶粒成品的吸水率、堆积密度、重金属挥发率等,并对烧成效果最好的陶粒成品进行了微观结构分析。结果表明,氰化尾渣利用率最高能达到75%,得到的焙烧陶粒1 h吸水率为9.45%、堆积密度为642.93 kg/m3,Au、Ag、Cu、Pb、Zn等金属挥发率分别达到83.02%、65.31%、75.89%、90.65%、85.34%。
Ceramsites were prepared through high-temperature chlorination roasting applying cyanidation tailings as raw materials and bentonite,sodium feldspar,CaCl2 and coal powder as additives.Physical and chemical properties of cyanide tailings such as phase composition and microstructure were analyzed with XRD,SEM,XRF,TG/DTA,ICP-OES and so on.Water absorption,bulk density,and heavy metal volatility of resultant ceramsite samples were measured.Ceramsites with the best performance parameters in original samples were selected for morphology analysis.The results indicate that cyanide tailings show a maximum utilization rate up to 75%,water absorption rate of ceramsite of one hour is 9.45%,and bulk density of ceramsite is 642.93 kg/m3.Volatility rates of heavy metals of Au,Ag,Cu,Pb and Zn is 83.02%,65.31%,75.89%,90.65%,and 85.34%,respectively.
作者
孙旭东
潘德安
龚裕
李光军
刘晓敏
SUN Xu-dong;PAN De-an;GONG Yu;LI Guang-jun;LIU Xiao-min(Institute of Circular Economy,Beijing University of Technology,Beijing 100124,China;Shandong Longyu Glass Co.,Ltd.,Zibo 255200,Shandong,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2020年第6期70-79,共10页
Nonferrous Metals（Extractive Metallurgy)
基金
国家重点研发计划项目(2018YFC1901806)。
关键词
氰化尾渣
氯化挥发
焙烧
陶粒
综合利用
cyanide tailings
chlorination roasting
roasting
ceramsite
comprehensive utilization
