焙烧-氰化浸出锰银矿中银的扩大试验
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摘要
采用添加剂焙烧-氰化浸出中试处理锰银矿。回转窑连续运转80 h,物料焙烧时间30±5 min,所得焙砂产率85.54%,焙砂中银含量237.73 g/t、锰含量24.68%,银回收率99.19%,锰回收率98.70%;焙砂经500 L反应釜直接氰化浸出,浸出液固比2:1～2.2:1,时间6～15 h,氰化钠用量700 g/t原矿,所得银浸出率86.5%,氰化尾渣满足冶金用锰矿石标准。
Additive roasting-cyanide leaching process was adopted for treating manganese-silver ore. The rotary kiln was continuously operated for 80 hours, and the ore was roasted for 30±5 minutes. The results showed that the content of silver and manganese was 237.73 g/t and 24.68% in the calcine, and that the recovery of silver and manganese was 99.19% and 98.70%, respectively. The resulted calcine was leached in 500 L reactor with a solid liquid ratio of 2:1～2.2:1, 6～15 h of leaching time, and 700 g/t of NaCN.Leaching results showed that the leaching ratio of silver was up to 86.5%, and that the residue met the standards of manganese ore for metallurgy.
Additive roasting-cyanide leaching process was adopted for treating manganese-silver ore. The rotary kiln was continuously operated for 80 hours, and the ore was roasted for 30±5 minutes. The results showed that the content of silver and manganese was 237.73 g/t and 24.68% in the calcine, and that the recovery of silver and manganese was 99.19% and 98.70%, respectively. The resulted calcine was leached in 500 L reactor with a solid liquid ratio of 2:1～2.2:1, 6～15 h of leaching time, and 700 g/t of NaCN.Leaching results showed that the leaching ratio of silver was up to 86.5%, and that the residue met the standards of manganese ore for metallurgy.
引文
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[4]姜涛,杨永斌,黄柱成,等.锰银矿的化学浸出工艺研究[J].中国锰业,1996,14(2):26-29.JIANG T,YANG Y B,HUANG Z C,et al.The new technologies of chemical leaching of manganese-silver ore[J],China’s manganese industry,1996,14(2):26-29.
[5]苏成德,赵礼兵,安雪梅.从难选锰银矿尾矿中回收银的研究[J].中国矿业,2008,17(1):89-92.SU C D,ZHAO L B,AN X M.A research for silver recovery from silver-manganese ore[J].China mining magazine,2008,17(1):89-92.
[6]李朝晖,庞雪敏,郭秀平,等.从锰银矿中湿法提取锰、银的工艺研究[J].湿法冶金,2012,31(6):373-375.LI Z H,PANG X M,GUO X P,et al.Test research on leaching of manganese and silver from manganese-silver ore[J].Hydrometallurgy of China,2012,31(6):373-375.
[7]张斌,陈启元,姜涛,等.锰银矿同步浸出锰、银新工艺试验研究[J].黄金,2001,22(7):26-29.ZHANG B,CHEN Q Y,JIANG T,et al.A new technological research for simultaneous leaching of manganese and silver from a manganese-silver associated ore[J].Gold,2001,22(7):26-29.
[8]齐建云,马晶,赵笑益,等.从锰银共生氧化矿中提取锰、银工艺研究[J].湿法冶金,2012,31(2):95-98.QI J Y,MA J,ZHAO X Y,et al.Study on extraction of manganese and silver from Mn-Ag oxidation ore[J].Hydrometallurgy of China,2012,31(2):95-98.