【摘要】：采用單因素法研究了磷石膏粒度、物料配比、反應(yīng)溫度和反應(yīng)時間對磷石膏轉(zhuǎn)化率的影響,試驗結(jié)果表明,在磷石膏粒度全部過80目,磷石膏與碳酸銨的質(zhì)量比為550:270,碳酸銨用量為理論用量的103%~110%,反應(yīng)溫度為65~70℃,反應(yīng)時間為2.5~3h的條件下,磷石膏的轉(zhuǎn)化率可達(dá)到96%以上,反應(yīng)得到的固體硫酸銨的產(chǎn)品質(zhì)量可達(dá)到GB 535-1995中一等品的要求。并采用正交試驗研究了各工藝參數(shù)對磷石膏轉(zhuǎn)化率的影響順序,試驗結(jié)果為,氨的用量影響最大,其次為固液比,然后是反應(yīng)時間、配料比和溫度。此外,對副產(chǎn)碳酸鈣渣生產(chǎn)輕質(zhì)碳酸鈣進(jìn)行了研究,試驗得到的輕質(zhì)碳酸鈣純度達(dá)到了96%以上,產(chǎn)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，

本文編號：2283528