化工矿物与加工2025，Vol.54Issue(1)：58-64,7.DOI:10.16283/j.cnki.hgkwyjg.2025.01.008
脱硫石膏制备硬石膏粉体试验研究
Experimental study on preparation of anhydrite powder from desulfurized gypsum
摘要
Abstract
Process test on the preparation of anhydrite powder at low temperature and normal pressure was carried out with desulfurized gypsum as raw material and sulfuric acid as additive.The optimum process conditions for the preparation of anhydrite powder were determined by single factor test.The effects of different sulfuric acid concentra-tion,liquid-solid ratio,reaction temperature and reaction time on the phase of the obtained product were investigated,and the recycling of the filtrate was discussed.The results show that long columnar anhydrite powder can be prepared under the conditions of sulfuric acid concentration of 8.5 mol/L,liquid-solid ratio of 10∶1,reaction temperature of 30℃and reaction time of 60 min without adding any crystal form control agent.By adding calcium carbonate,the recy-cling of sulfate in the filtrate was successfully achieved.The research results provide the new technical path for the high-value utilization of desulfurization gypsum.关键词
脱硫石膏/硫酸/硬石膏粉体/溶解-结晶/滤液/单因素试验Key words
desulfurization gypsum/sulfuric acid/anhydrite powder/dissolution-crystallization/filtrate/single factor test分类
化学化工引用本文复制引用
刘卓齐,陈秋菊,李静秋,丁文金..脱硫石膏制备硬石膏粉体试验研究[J].化工矿物与加工,2025,54(1):58-64,7.基金项目
四川省自然科学基金面上项目(2023NSFSC0348) （2023NSFSC0348）
四川省科技创新创业苗子工程重点项目(2023JDRC0070) （2023JDRC0070）
四川省大学生创新创业训练计划项目(S202310619094). （S202310619094）
