从含稀有金属炉渣中富集稀有金属的研究

Study on Enrichment of Rare Metals from Rare-metals-bearing Slag

采用不同条件浸出某含稀有金属炉渣,考察浸出条件对炉渣中氧化铝、氧化硅、氧化钙浸出率的影响。结果表明,采用稀酸浸出可以将稀土、铌、钛的品位分别提高到8.62%、5.40%、25.06%;采用"碳酸钠焙烧—水浸—酸浸"可以使稀土、铌、钛的品位分别提高到15.40%、9.97%、33.86%,稀土、铌、钛的直收率分别达到94.11%、94.27%、80.52%。

Rare metals bearing slag was leached by different methods. The effects of leaching parameters on leaching rates of alumina, silica and calcium oxide were investigated. The results show that the grades of rare earth, niobium and titanium rose to 8.62%, 4.09% and 25.06%, respectively by dilute acid leaching. The grades of rare earth, niobium and titanium rose to 15.40%, 9.97% and 33.86%, respectively, with recovery of 94.11%, 94. 27% and 80.52%, respectively by sodium carbonate roasting of slag, water leaching acid leaching.