太原理工大学学报2011，Vol.42Issue(6)：593-597,5.
杂质对磷石膏与碳酸铵反应及产物碳酸钙结晶的影响
Effect of Impurities on Conversion of Gypsum and Crystallization of Calcium Carbonate
摘要
Abstract
An effective approach of phosphogypsum utilization is the production of ammonium sulfate from ammonium carbonate and phosphogypsum. However, impurities in phosphogypsum have a negative impact on gypsum transformation process and the crystallization of calcium carbonate , and thus on the separation process of calcium carbonate. In this paper, calcium sulfate dihydrate and ammonium carbonate were used as raw materials, with phosphoric acid, magnesium nitrate, sodium fluoride and acid-insoluble material(AI) as impurity additives, to investigate the effects of the impurities P, Mg2+ , F- and AI on the conversion of calcium sulfate. The crystal line state and morphology of the product calcium carbonate were characterized by SEM and XRD analysis. The results show that the impurities not only affected the conversion of sulfur in gypsum, but also changed the type and shape of calcium carbonate crystal, consequently, affected the physical properties and filtration performance of products.关键词
杂质/二水硫酸钙/碳酸铵/转化率/碳酸钙结晶Key words
impurity/calcium sulfate dihydrate/ammonium carbonate/conversion/calcium car-bonate crystals分类
化学化工引用本文复制引用
丁光月,李岳,樊彩梅,荆宏健,冯军强..杂质对磷石膏与碳酸铵反应及产物碳酸钙结晶的影响[J].太原理工大学学报,2011,42(6):593-597,5.基金项目
校企科研合作资助项目(2008-1225) （2008-1225）
