高校化学工程学报2016，Vol.30Issue(6)：1366-1371,6.DOI:10.3969/j.issn.1003-9015.2016.06.019
硫酸浸提对磷矿石物性变化影响
Effects of Sulfuric Acid Leaching on Physical Properties of Phosphate Ore
摘要
Abstract
Sulfuric acid leaching of phosphoric ore was investigated under conditions of reaction temperature 80℃, stirring speed 300 rmin1 and reaction time 180 min. SEM, XRD, EDS, BET and particle size analysis were used to characterize the resultant crystals. Atomic absorption spectrophotometer (AAS) was employed to determine ion concentrations. The results show that phosphate ore is almost decomposed and changed to CaSO42H2O grain after 120 min. The crystals of CaSO4H2O grow on the surface of phosphate ore at the beginning, which peel off from the surface after reaching to certain limit with ore structure collapsed. The average particle size increases first and then decreases. The hysteresis loop of nitrogen adsorption isotherms changes from H3 into H4.关键词
磷酸生产/二水硫酸钙/结晶/化学过程Key words
phosphoric acid production/calcium sulphate dehydrate/crystallization/chemical processes分类
化学化工引用本文复制引用
郑凌志,窦焰,孙祥斌,沈浩,郑之银,刘荣,崔鹏..硫酸浸提对磷矿石物性变化影响[J].高校化学工程学报,2016,30(6):1366-1371,6.基金项目
安徽省创新环境建设专项(1606a1003040)。 （1606a1003040）
