以氢氧化钙或氧化钙为钙源和苛化源,采用一步法回收仲钨酸铵结晶母液中的钨和氨。化学平衡原理分析和验证实验表明,一步法回收钨和氨技术可行。当Ca~(2+)/NH_4~+计量摩尔比大于0.5时,钨沉淀效果较好,残留液中钨含量低于10 mg/L,溶液中NH_4~+残留浓度小于200 mg/L。 Using calcium hydroxide or calcium oxide as the calcium source and causticizing source, the tungsten and ammonia in the mother liquor of ammonium paratungstate crystallization are recovered in one step. Chemical equilibrium principle analysis and verification experiments show that one-step recovery of tungsten and ammonia technology is feasible. When the Ca ~ (2 +) / NH_4 ~ + molar ratio is greater than 0.5, the precipitation of tungsten is better, the content of tungsten in the residual solution is less than 10 mg / L and the residual concentration of NH_4 ~ + in the solution is less than 200 mg / L.