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›› 2009, Vol. 9 ›› Issue (5): 927-931.

• 过程与工艺 • 上一篇    下一篇

含钒灰渣酸浸液结晶铵明矾的工艺条件

徐耀兵 王勤辉 施正伦 方梦祥 高翔 骆仲泱   

  1. 浙江大学能源清洁利用国家重点实验室 浙江大学能源清洁利用国家重点实验室 浙江大学能源清洁利用国家重点实验室 浙江大学能源清洁利用国家重点实验室 浙江大学能源清洁利用国家重点实验室 浙江大学能源清洁利用国家重点实验室
  • 收稿日期:2009-04-29 修回日期:2009-07-13 出版日期:2009-10-20 发布日期:2009-10-20
  • 通讯作者: 施正伦

Crystallization Conditions of Ammonium Aluminum Sulfate from Acid Leachate of the Ash Containing Vanadium

XU Yao-bing WANG Qin-hui SHI Zheng-lun FANG Meng-xiang GAO Xiang LUO Zhong-yang   

  1. State Key Laboratory of Clean Energy Utilization Zhejiang University State Key Laboratory of Clean Energy Utilization Zhejiang University State Key Laboratory of Clean Energy Utilization Zhejiang University State Key Laboratory of Clean Energy Utilization Zhejiang University State Key Laboratory of Clean Energy Utilization Zhejiang University State Key Laboratory of Clean Energy Utilization Zhejiang University
  • Received:2009-04-29 Revised:2009-07-13 Online:2009-10-20 Published:2009-10-20
  • Contact: SHI Zheng-lun

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摘要： 为获得含钒灰渣酸浸液结晶铵明矾的优化工艺条件，利用正交优选法研究了Al2(SO4)3浓度、铵/铝摩尔比、冷却速度和结晶温度对铵明矾结晶率的影响，分析了铵明矾晶体和滤液的成分，计算得到了铵明矾的结晶率. 结果表明，4种因素对铵明矾结晶率均有较大影响，Al2(SO4)3浓度、铵/铝摩尔比对铵明矾结晶率影响较为显著. 合理的铵明矾结晶工艺条件为：Al2(SO4)3浓度150~200g/L，铵/铝摩尔比1.2左右，冷却速度15℃/h左右，结晶温度5℃左右. 在此条件下，铵明矾结晶率为89.32%.

关键词: 含钒灰渣, 铵明矾, 工艺条件, 结晶率

Abstract: In order to obtain optimal processing conditions of extracted ammonium aluminum sulfate from the acid leaching solution, orthogonal experiments were conducted to study the effects of concentration of aluminum sulfate, molar ratio of ammonium to aluminum, cooling rate and crystallization temperature on the crystallization rate of ammonium aluminum sulfate. Compositions of the leachate and ammonium aluminum sulfate were measured, and the crystallization rate was calculated. The results show that all of the four factors have obviously influences on the crystallization rate, and the concentration of aluminum sulfate and molar ratio of ammonium to aluminum are prominent comparatively. Their optimal conditions obtained as followed: concentration of aluminum sulfate is between 150 and 200 g/L, molar ratio of ammonium to aluminum about 1.2, cooling rate about 15℃/h, and crystallization temperature about 5℃. With the conditions, the crystallization rate of ammonium aluminum sulfate is 89.32%.

Key words: ash containing vanadium, ammonium aluminum sulfate, optimal processing conditions, crystallization efficiency

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