NaOH-NaNO_(3)熔融盐法分离分银渣试验  

Separation of Silver Separating Residue by NaOH-NaNO3 Molten Salt Method

作　　者：房孟钊 FANG Meng-zhao

机构地区：[1]中国有色矿业集团刚果矿业有限责任公司,北京100000 [2]大冶有色金属有限责任公司,湖北黄石435002

出　　处：《有色冶金节能》2022年第5期40-45,共6页Energy Saving of Nonferrous Metallurgy

摘　　要：采用NaOH-NaNO_(3)熔融盐法分离分银渣中Pb、Sn、Sb、Bi,确定了最优的工艺条件为NaOH∶NaNO_(3)∶分银渣的配比为45∶20∶10、熔炼温度700℃、熔炼时间2.5 h、浸出温度80℃、浸出时间40 min、液固比6∶1。在最优的条件下,分银渣中Pb、Sn进入了浸出液中,回收率分别达到了83.77%、86.92%,98%以上的Sb和Bi进入浸出渣中。The NaOH-NaNO_(3)molten salt method was used to separate Pb,Sn,Sb and Bi in the silver separating residue,and the optimal process conditions are as follows:the ratio of NaOH∶NaNO_(3)∶silver concentrate is 45∶20∶10,smelting temperature is 700℃,smelting time is 2.5 h,leaching temperature is 80℃,leaching time is 40 min and the liquid-solid ratio is 6∶1.Under the optimal conditions,Pb and Sn in the silver concentrate entered into the leachate,and the recovery rates reached 83.77%and 86.92%,respectively.More than 98%Sb and Bi entered into the leaching residue.

关 键 词：熔融盐 分银渣 浸出液 浸出渣 回收率 

分 类 号：TF111.52[冶金工程—冶金物理化学]