武汉工程大学学报Issue(10)：7-12,6.DOI:10.3969/j.issn.1674-2869.2014.010.002
含镁磷酸盐熔融还原制磷的动力学
Reaction kinetics of smelting reduction for phosphorous production with magnesium phosphate slag
摘要
Abstract
The phosphate reduction reaction was carried out with ore slag and solid graphite as reactant. The prepared slag is a mixture of pure calcium phosphate, calcium oxide, silica, magnesia and alumina. The reaction time, temperature and slag acidity were changed during the reactions. The reduction rate was obtained by analyzing phosphorous pentoxide content in slag with Quinoline phosphomolybdate gravimetric method. The results show that the reduction rate increases simultaneously with the increase of reaction temperature and the reaction time;w hen the acidity mk is 1. 15, the reduction rate is higher than that as mk is 0. 85 and 0. 75 ;the highest increase in the reduction percentage is obtained w hen mk is 0. 75. T he kinetic experiments of the reduction process w ere carried out in static conditions, and the apparent reaction rate equation was obtained, which confirms that the rate control step in reduction process of phosphate with solid carbon at a high temperature is the diffusion step.关键词
热法磷酸/磷酸盐/熔融还原/动力学Key words
thermal method/phosphate/smelting reduction/kinetic分类
化学化工引用本文复制引用
金放,裴玉华,田琦峰,吴元欣..含镁磷酸盐熔融还原制磷的动力学[J].武汉工程大学学报,2014,(10):7-12,6.基金项目
湖北省中低品位磷矿资源开发利用协同创新中心开放基金 （）
