涡流贫化法回收铜渣中的金、银、铜

Recovery of Au,Ag and Cu from Copper Slag by Vortex Dilution Method

采用熔融铜渣为原料,经过涡流贫化过程,回收铜渣中的金、银、铜,贫化渣进一步升温还原得到含铜铁水,最终可制备成耐磨铸铁。结果表明,通过涡流贫化,铜渣中的Fe_(3)O_(4)被还原为FeO,然后FeO与SiO_(2)结合,生成Fe_(2)SiO_(4)。经过涡流贫化后,金、银、铜的回收率分别达到了99.44%、93.97%和93.14%。贫化渣中Fe_(3)O_(4)和铜的含量分别为1.53%和0.61%(质量分数)。贫化渣涡流还原后得到的含铜铁水制备的耐磨铸铁成分满足高铬耐磨铸铁国标要求。

The molten copper slag was used as raw material,the gold,silver and copper in copper slag were recovered by the vortex dilution process,and the depleted slag was further reduced to produce copper-containing molten iron,which could finally be prepared into wear-resistant cast iron or copper-containing antimicrobial stainless steel.The results show that Fe_(3)O_(4)in copper slag is reduced to FeO by FeS and then FeO combines with SiO_(2)to form Fe_(2)SiO_(4).After vortex dilution,the recovery rates of gold,silver and copper reach 99.44%,93.97%and 93.14%,respectively.The content of Fe_(3)O_(4)and Cu in diluted slag is 1.53%and 0.61%,respectively.The copper-containing molten iron is obtained from the diluted copper slag by vortex reduction and then used to produce the wear-resistant cast iron,the element composition of which can meet the requirements of national standard of high chromium wear-resistant cast iron.