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大部分的含锰的银氧化矿石含有与银结合的锰,不能用传统的提取银的方法处理(包括标准的氰化法技术).可是,如所周知,当把锰溶解,则可用传统的方法将银回收.在离析法过程中,矿石与少量食盐和还原剂一起加热到680℃~800℃,银被挥发,迁移和被还原成金属银粒子.用传统的氰化物浸出法处理产生的焙砂.在实验中对成分为0.02%Cu、0.09%Pb、0.33%Zn、12.55%Mn和187g/t的含锰银矿石进行了离析—氰化法的研究,研究了焙烧温度和时间以及食盐和焦炭加入量的影响。离析条件为850℃,食盐量2.0%,焦炭量为1.0%,时间30分钟;氰化浸出条件为室温,溶液含NaCN907g/t,pH11,时间72小时,结果得的银回收率97.8%。
Most manganese-bearing silver oxide ores contain manganese bound to silver and can not be treated by traditional silver extraction methods (including standard cyanidation techniques). However, as is known, when manganese is dissolved, the silver can be recovered by conventional methods. In the separation process, the ore is heated to a temperature of 680 ° C to 800 ° C with a small amount of salt and a reducing agent, and the silver is volatilized, migrated and reduced to metallic silver particles. The resulting calcine is treated by conventional cyanide leaching methods. In this experiment, the ionization-cyanidation of 0.02% Cu, 0.09% Pb, 0.33% Zn, 12.55% Mn and 187 g / t Mn- Roasting temperature and time as well as salt and coke additions. The conditions for the separation were 850 ° C, salt content 2.0%, coke amount 1.0%, and time 30 minutes; the cyanide leaching conditions were room temperature, the solution containing NaCN 907g / t, pH 11, the time 72 hours, the resulting silver recovery 97.8%.