半水法磷酸生产工艺研究
Study on hemihydrate process for WPA production
伍洋 1刘代俊 1王章露1
作者信息
- 1. 四川大学化学工程学院,四川成都610065
- 折叠
摘要
针对半水法磷酸工艺在高浓度磷酸条件下研究了磷矿粒度、反应温度和反应时间对P2O5转化率的影响,并在不同硫酸浓度条件下测定了反应活性表达式,最后对采用多种游离硫酸浓度条件下的半水流程进行了长周期运行,获得了较优的操作条件,当结晶槽中ρ(SO3游离)为40～50 g/L时P2O5转化率可以达到94.45％.
Abstract
The influences of particle size, reaction temperature and time on conversion ratio of P2O5 are investigated for hemihydrate process WPA production with high concentration of phosphoric acid. The equation expressing reactivity in different concentrations of sulfuric acid is obtained. Finally, the experiment of hemihydrate process under different concentration of sulfuric acid is made in the long term operation so as to obtain the optimum operating conditions. The conversion rate of P2O5 can reach to 94.45% while the concentration of free SO3 is 40 to 50 g /L in the crystallization tank.
关键词
湿法磷酸/半水法/P2O5转化率Key words
wet-process phosphoric acid (WPA)/hemihydrate process/conversion rate of P2O5引用本文复制引用
出版年
2013
NETL
NSTL
维普
万方数据