Study on Resources and Separate Treatment of Wastewater from Rare Earths Hydro-Smelting
稀土湿法冶炼废水处理与资源化研究

In the paper,cleaner production is being adopted to the technological transformation of rare earths hydrosmelting.On the basis of the cleaning process design the economy and reasonability were expounded by tests and analysis of process principle:reuse 3000t/a FeSO47H2O from acid wastewater;reuse 3000t/a Na2SO4 from alkaline wastewater;F- could be recovered at the rate of 86%;the quantity of wastewater can be reduced by 58% and of waste rock can be reduced 90%;the economical benefits can reach above 150 ten thousand Yuan per year the effluent meet with the national standards.