烧结电除尘灰浸出液氯化钾转化法制备硫酸钾

发布时间：2018-04-26 09:34

本文选题：烧结电除尘灰 + 氯化钾　；参考：《环境工程学报》2016年03期

【摘要】：对烧结电除尘灰进行了浸出实验,研究结果表明,浸出液中含有较高含量的氯化钾和硫酸钾等钾盐。根据硫酸钾、氯化铵、硫酸铵和氯化钾的分解温度和溶点的不同,可以利用硫酸铵与氯化钾转化生成硫酸钾和氯化铵。考察了反应摩尔比、乙醇用量、蒸发量、氯化钠含量等因素对硫酸钾纯度和收率的影响。结果表明,乙醇的洗涤对硫酸钾产品纯度和总收率有一定的影响。氯化钾与硫酸铵按照化学计量比2KCl∶(NH4)2SO4=1∶1进行复分解反应能在硫酸钾纯度和收率上获得较好的效果,其硫酸钾产品收率达到80%左右,氯化钾铵复合肥的收率为12.76%。氯化钠杂质的存在不仅能影响硫酸钾产品的纯度和收率,而且过高的氯化钠会与硫酸钾形成K3Na(SO4)2复盐,降低硫酸钾的产量。同时,设计了从烧结灰浸出液中KCl生产硫酸钾及氯化钾铵复合肥的工艺路线图,为从烧结电除尘灰生产硫酸钾提供了一个可能的生产方法。
[Abstract]:The leaching experiment of sintered electric dust ash was carried out. The results showed that the leaching solution contained high content of potassium chloride and potassium sulfate. According to the decomposition temperature and solution point of potassium sulfate, ammonium chloride, ammonium sulfate and potassium chloride, ammonium sulfate and potassium chloride can be converted to potassium sulfate and ammonium chloride. The effects of molar ratio of reaction, amount of ethanol, evaporation amount and sodium chloride content on the purity and yield of potassium sulfate were investigated. The results showed that the purity and total yield of potassium sulfate were influenced by the washing of ethanol. The yield of potassium sulfate is about 80%, and the yield of potassium chloride compound fertilizer is 12.76%. The presence of impurities in sodium chloride can not only affect the purity and yield of potassium sulfate, but also result in the formation of K3Na(SO4)2 double salt with potassium sulfate when the content of sodium chloride is too high, thus reducing the yield of potassium sulfate. At the same time, the technological roadmap of producing potassium sulfate and ammonium chloride compound fertilizer from sinter ash leaching solution by KCl is designed, which provides a possible production method for producing potassium sulfate from sintered ash.
【作者单位】：北京科技大学钢铁冶金新技术国家重点实验室;
【基金】：国家高技术研究发展计划(863)项目(2012AA062502,2012AA06A118)
【分类号】：TQ131.13

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