武汉工程大学学报2012，Vol.34Issue(5)：8-12,5.DOI:10.3969/j.issn.1674-2869.2012.05.003
振动流化床中氢气还原分解磷石膏
Reductive decomposition of phosphogypsum utilizing hydrogen in Vibro-Fluidized bed
摘要
Abstract
The reductive decomposition of phosphogypsum utilizing hydrogen was studied in Vibro-FIuidized bed. Kinetics effecting factors of concentration of hydrogen, reaction temperature, gas flow, amplitude to diameter rate (H0/D) and reaction time were investigated respectively. The results show that the decomposition rate rises with the increase of the concentration of hydrogen, but the desulfurization rate rises first then decreases; the rate of decomposition and desulfurizalion rate can be promoted by increasing the reaction temperature and decreasing the H0/D; a lower or higher gas flow cannot improve the reductive decomposition of phosphogypsum. In general, the longer of the reaction time, the higher of the decomposition and desulfurization rate within a certain range. While the opital conditions of reductive decompostiton are the temperature of 1 050 ℃ ,5% of H2, H0/D of 1. 2, gas flow of 242 mL/min (μ=20μmf) and 60 min of reaction time, the decomposition and desulfurization rates are 98. 78% and 84. 24% respectively. The results meet the demand of producing acid lime with cement, and have important significations for studying the new process of reductive decomposition of phosphogypsum.关键词
磷石膏/氢气/还原/振动流化床/分解率Key words
phosphogypsum/ hydrogen/ reduction/ Vibro-fluidized bed (VFB) /decomposition rate分类
化学化工引用本文复制引用
陈升,刘少文,贾辉,吴元欣,包传平..振动流化床中氢气还原分解磷石膏[J].武汉工程大学学报,2012,34(5):8-12,5.基金项目
湖北省自然科学基金重点项目(2011CDA036) （2011CDA036）
