化学工程2012，Vol.40Issue(12)：48-52,5.DOI:10.3969/j.issn.1005-9954.2012.12.012
布风板对磷矿混合颗粒流化特性与还原反应的影响
Effect of gas distributor on fluidization characteristics and reduction reaction of mixed phosphate ore particles
摘要
Abstract
In view of the problems in kiln phosphoric acid process, such as low reduction rate of phosphate ore, poor heat and mass transfer, and agglomeration of feed materials, the fluidization technology was applied to the reduction reaction of phosphate ore. The pressure drop of gas distributor, operation flexibility, fluidization quality, and high temperature fluidized reduction of phosphate ore were investigated to evaluate the performance of 4 types of gas distributor, and the results were compared with the experimental results of thermal model in the fixed bed. The results show that with the increase of gas flow rate, the pressure drop of the straight-hole distributor increases in the form of quadratic function, while the pressure drop of the slant-hole distributor increases in the form of linear function. Both resistance loss and bed pressure drop of the slant-hole distributor were higher than those of the straight-hole distributor. For the cylindrical slant-hole distributor, the pressure fluctuation is minimal, and the fluidization quality is the best. The reduction rate of phosphate ore using slant-hole distributor is better than that using straight-hole distributor, indicating that slant hole is conducive to the reduction of phosphate ore. When the mole ratio of silicon to calcium is 3. 0, at 1 300℃ , the reduction rate using cylindrical slant-hole distributor is 98. 26% . The fluidized bed has advantages over the fixed bed in the reduction of phosphate ore.关键词
流态化/布风板/磷矿/还原/窑法磷酸Key words
fluidization/ gas distributor/ phosphate ore/ reduction/ kiln phosphoric acid process分类
化学化工引用本文复制引用
田昊一,康明雄,吴元欣,刘根炎,陈启明,李茜..布风板对磷矿混合颗粒流化特性与还原反应的影响[J].化学工程,2012,40(12):48-52,5.基金项目
国家科技支撑计划资助项目(2007BAB08B10) （2007BAB08B10）
教育部"矿物处理过程强化"创新团队资助项目(IRT0974) （IRT0974）
