Method for treating high-evaporation mother liquid in alumina production

The invention discloses a method for treating high-evaporation mother liquid in alumina production, comprising: precipitating and separating the high-evaporation mother liquid to obtain concentrated mother liquid and sodium carbonate; sintering aluminum ash and sodium carbonate to obtain clinker, wherein the clinker contains aluminum aluminate; pulping the clinker to obtain a pulp; finely filtering the pulp to obtain sodium aluminate solution; subjecting the sodium aluminate solution to seed decomposition to obtain aluminum hydroxide and seed decomposed mother liquid. In the method, the dangerous waste aluminum ash is used to treat mass Na2CO3 in the high-evaporation mother liquid, the process of causticizing sodium carbonate is omitted, mass sodium carbonate from alumina production by Bayer process is recycled, valuable matters in aluminum ash are also recycled, the dangerous waste aluminum ash is converted into common waste, and the treatment of toxic dangerous wastes is facilitated. 本发明公开了处理氧化铝生产中高蒸母液的方法。该