摘要
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。
Tungsten and ammonia from mother liquor after crystallization of ammonium paratungstate can be recovered directly with Ca(OH)2 or CaO as resources of calcium and caustification. A chemical equilibrium theory analysis and an experimental study verified that such one-step process is technically feasible for recovering tungsten and ammonia. It is found that Ca^2+/NH4^+ molar ratio being more than 0. 5 can result in a better tungsten precipitation,leaving 10 mg/L tungsten in the residue and less than 200 mg/L NH4+in the solution.
出处
《矿冶工程》
CSCD
北大核心
2017年第3期105-107,共3页
Mining and Metallurgical Engineering
基金
广西自然科学基金(2015GXNSFAA139283)
广西高校有色金属清洁冶炼与综合利用重点实验室资助项目
广西有色金属及特色材料加工重点实验室资助项目
桂林理工大学博士启动资金资助项目
关键词
仲钨酸铵
结晶母液
钨
氨氮回收
ammonium paratungstate
mother liquor after crystallization
tungsten
recovery of ammonia nitrogen