磷石膏制硫酸铵与副产碳酸钙工艺研究
发布时间：2018-10-20 15:08
【摘要】：采用单因素法研究了磷石膏粒度、物料配比、反应温度和反应时间对磷石膏转化率的影响,试验结果表明,在磷石膏粒度全部过80目,磷石膏与碳酸铵的质量比为550:270,碳酸铵用量为理论用量的103%~110%,反应温度为65~70℃,反应时间为2.5~3h的条件下,磷石膏的转化率可达到96%以上,反应得到的固体硫酸铵的产品质量可达到GB 535-1995中一等品的要求。并采用正交试验研究了各工艺参数对磷石膏转化率的影响顺序,试验结果为,氨的用量影响最大,其次为固液比,然后是反应时间、配料比和温度。此外,对副产碳酸钙渣生产轻质碳酸钙进行了研究,试验得到的轻质碳酸钙纯度达到了96%以上,产品的白度值大于90。
[Abstract]:The effects of phosphogypsum granularity, material ratio, reaction temperature and reaction time on the conversion of phosphogypsum were studied by single factor method. The results showed that the particle size of phosphogypsum was over 80 mesh. When the mass ratio of phosphogypsum to ammonium carbonate is 550: 270, the amount of ammonium carbonate is 103% of the theoretical amount, the reaction temperature is 6570 鈩，
本文编号：2283528
[Abstract]:The effects of phosphogypsum granularity, material ratio, reaction temperature and reaction time on the conversion of phosphogypsum were studied by single factor method. The results showed that the particle size of phosphogypsum was over 80 mesh. When the mass ratio of phosphogypsum to ammonium carbonate is 550: 270, the amount of ammonium carbonate is 103% of the theoretical amount, the reaction temperature is 6570 鈩，
本文编号：2283528
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