摘要
二次氨浸工艺中,将氨浸渣中不溶钼转化为可溶钼,提高钼回收率。以NH4CO3、NH4HCO3为转化剂、为强氧化剂,分别研究转化剂与氧化剂、反应温度的协同作用规律,利用缩芯模型、化学反应动力学进行解析。结果表明:在相同条件下,温度为60℃时加入碳酸铵、适量次氯酸钠,氨浸渣中可溶钼含量最低为1.64%。利用缩芯模型原理,深度转化一次氨浸渣,可有效提高钼化工中金属钼的回收率。
In the production process of ammonium molybdate,the ammonia leaching procedure is optimized,thereby reducing molybdenum content in ammonia leaching residue and improving the recovery rate of molybdenum.Adding ammonium carbonate and ammonia bicarbonate as transforming agent and oxidizing agent into ammonia leaching,the synergistic effect law of transforming agent,oxidizing agent and reaction tempertature was studied The results show that the process in accordance with the shrinking core model,under the same conditions,the temperature was controlled at 60 ℃ with ammonium carbonate and proper amount of sodium hypochlorite added,the lowest molybdenum content of ammonia leaching residue is 1. 64%. The shrinking core model in the study of the improvement of molybdenum recovery created a new research direction.
出处
《中国钼业》
2015年第1期12-15,共4页
China Molybdenum Industry
基金
渭南市科技资金项目(2012JCY-2)
渭南师范学院重点基金项目(12YKF020)
关键词
钼酸铵
氨浸
氨浸渣
转化
回收率
缩芯模型
ammonium molybdate
ammonia leaching
ammonia leaching residue
conversation
recovery yield
shrinking core model
