镁、铝、铁杂质对硫酸钙结晶的影响  

Effect of magnesium,aluminum and iron impurities on calcium sulfate crystallization

作　　者：李防[1,2] 郑光明 朱干宇[3] 贺雷 刘兵兵[1] 刘华 LI Fang;ZHENG Guangming;ZHU Ganyu;HE Lei;LIU Bingbing;LIU Hua(Hubei Xingfa Chemicals Group Co.,Ltd.,Xingshan 443700,China;Yidu Xingfa Chemical Co.,Ltd.,Yidu 443300,China;Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]湖北兴发化工集团股份有限公司,湖北兴山443700 [2]宜都兴发化工有限公司,湖北宜都443300 [3]中国科学院过程工程研究所,北京100190 [4]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《磷肥与复肥》2022年第1期5-8,共4页Phosphate & Compound Fertilizer

基　　金：国家重点研发计划(2019YFC1905801)。

摘　　要：系统考察湿法磷酸体系中Mg、Al、Fe杂质对硫酸钙结晶过程的影响规律。结果表明,Mg含量较高时会抑制硫酸钙晶体生长,湿法磷酸实际生产中Mg浓度在0.85~3.40 mol/L时对硫酸钙晶体生长产生抑制作用;硫酸钙晶体随AlPO_(4)浓度的升高而长大,且粒径分布均匀;低浓度的Fe可以促进硫酸钙晶体生长。The effects of Mg,Al and Fe impurities on the crystallization of calcium sulfate in wet-process phosphoric acid system are systematically investigated.The results show that high concentration of Mg can inhibit the growth of calcium sulfate crystals,in the actual production of wet-process phosphoric acid,Mg concentration in the range of 0.85-3.40 mol/L inhibits the growth of calcium sulphate crystals.Calcium sulfate crystals grow with the increase of AlPO_(4)concentration,and the particle size is uniform.Low concentration of Fe can promote the growth of calcium sulfate crystal.

关 键 词：湿法磷酸 杂质 硫酸钙 结晶 

分 类 号：TQ126.3[化学工程—无机化工] TQ132.32