含锗煤烟灰高温还原挥发试验研究  

Experimental Study on the Reductive Volatilization of Germanium from Lignite Soot at High Temperature

作　　者：唐建文[1] 黄伟兵[1] 羡鹏飞 杜国山[1] TANG Jian-wen;HUANG Wei-bin;XIAN Peng-fei;DU Guo-shan

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《有色冶金节能》2020年第6期30-33,共4页Energy Saving of Nonferrous Metallurgy

摘　　要：以褐煤烟灰为原料,以褐煤为还原剂,进行高温还原挥发研究,分别考察褐煤与煤烟灰配比、碱度、还原温度和还原时间对锗挥发率的影响。试验结果表明,当还原时间为10 h、褐煤与煤烟灰质量比为1∶1时,锗挥发率达到99.99%;当还原时间较长时,碱度对锗挥发率影响并不明显,但能显著提高熔体流动性;锗的挥发率随着还原温度和还原时间的增加而提高,当还原温度为1500℃、还原时间为8 h时,锗的挥发率大于98%。Using lignite soot as raw material and lignite as reducing agent,the reductive volatilization of germanium from soot at high temperature was studied.The effects of the ratio of lignite to soot,alkalinity,reduction temperature and reduction time on germanium volatilization rate were investigated respectively.The results showed that the germanium volatilization rate was 99.99%when the reduction time was 10 h and the mass ratio of lignite to soot was 1∶1.In addition,When the reduction time was long,alkalinity had no obvious effect on the volatilization rate of germanium,but it can significantly improve the melt fluidity.Furthermore,The volatilization rate of germanium increased with the increase of reduction temperature and reduction time.When the reduction temperature was 1500℃and the reduction time was 8 h,the volatilization rate of germanium was greater than 98%.

关 键 词：煤烟灰 高温还原挥发 碱度 锗挥发率 

分 类 号：X758[环境科学与工程—环境工程]