含金滤液中金、银及其他有价金属回收的探索研究

含金滤液分别通过中和沉淀、硫化沉淀、铁粉置换三种工艺回收其中的金、银及其他有价金属。探索试验结果表明,中和沉淀法由于渣量大,渣中金属品位低的原因,不适于直接处理含金滤液。硫化沉淀法由于硫化钠耗量大,同时产生大量硫化氢气体也不适用。含金滤液采用铁粉置换工艺进行处理,铁粉耗量少7kg/m3,渣中金属品味高,金、银、铜分别达到370.8 g/t、4230.5 g/t和25%,此工艺适合含金滤液中金、银、铜的回收。

The exploration research of the recovery of Au, Ag and other valuable metals from gold-containing filtrate

The Au, Ag and other valuable metals in gold-containing filtrate were recovered by Lime neutralization, Sulfide precipitation and Iron replacement method. The exploration research results indicate that Lime neutralization and Sulfide precipitation method were not applicable for recovery from gold-containing filtrate, because of heavy precipitate and the low-grade of metals in precipitate in neutralization process, and a lot of sodium sulfide consumed and H2S produced in Sulfide precipitation process. The gold-containing filtrate is treated by iron replacement method. When the iron addition was 7 kg/m3, the contents of Au, Ag and Cu in cementation produced in iron replacement process were 370.8 g/t, 4230.5 g/t and 25%, respectively. Therefore the process could be used for recovering Au, Ag and other metals from gold-containing filtrate.