中南大学学报（自然科学版）2011，Vol.42Issue(8)：2221-2226,6.
漂浮阳极泥富集金银及回收锑铋工艺
Enrichment of Au and Ag and recovery of Sb and Bi from floating anode slime
摘要
Abstract
Floating anode slime was leached by hydrochloric acid to enrich Au and Ag. The leaching solution was used to recover Sb and Bi by twice hydrolysis, respectively. Effects of reaction temperature, concentration of hydrochloric acid, reaction time on leaching rates of Sb and Bi during hydrochloric acid leaching process, effect of dilution ratio on hydrolysis rate of Sb during hydrolysis process of Sb and effect of final pH on hydrolysis rate of Bi during hydrolysis process of Bi were investigated. The experimental results show that the leaching rates of Sb and Bi are 99.2% and 99.1% when hydrochloric acid concentration is 6 mol/L, reaction temperature is 80℃, ratio of solid to liquid is 1:5, reaction time is 1 h. Compared with not-leached floating anode slime, the content of Au and Ag in leached floating anode slime are enriched by more than 15 times. The hydrolysis rate of Sb is 95% after the hydrochloric acid leaching solution is diluted 8 times by water to hydrolyze Sb, and the total recovery rate of Sb is 94.2%. The hydrolysis rate of Bi is 99.5% when the hydrolysate of solution is adjusted to pH=8 by NaOH after hydrolyzing Sb3*, and the total recovery rate of Bi is more man 90%. For its low impurity content, the solution of hydrolyzing Bi3+ is used to dilute hydrochloric acid leaching solution.关键词
漂浮阳极泥/盐酸浸出/金/银/锑/铋/水解Key words
floating anode slime/ hydrochloric acid leaching/ Au/ Ag/ Sb/ Bi/ hydrolysis分类
矿业与冶金引用本文复制引用
郑雅杰,洪波..漂浮阳极泥富集金银及回收锑铋工艺[J].中南大学学报（自然科学版）,2011,42(8):2221-2226,6.基金项目
广东省教育部产学研重大项目(2008A090300016) （2008A090300016）
