武汉工程大学学报2011，Vol.33Issue(3)：12-15,4.DOI:10.3969/j.issn.1674-2869.2011.03.004
磷石膏制取硫酸铵及其溶析结晶
(NH4)2SO4 production via reaction of (NH4)2CO3 and phosphogypsum
摘要
Abstract
The production of (NH4)2SO4 from phosphogypsum and (NH4)2CO3 has been investigated.The factors affecting the conversion of phosphogypsum to (NH4)2SO4, such as (NH4)2CO3 to phosphogypsum ratio, reaction temperature, reaction time, stripping speed and liquid to solid ratio were studied.The optimum reaction conditions obtained at (NH4)2CO3 to phosphogypsum ratio 1.15,50 ℃, reaction time 120 min, stripping speed 150 r/min and liquid to solid ration 5∶ 1.The maximum conversion of phosphogypsum to (NH4)2SO4 obtained under these conditions was 98.68％.A new crystallization method of (NH4)2SO4 was proposed, and the main factors affecting crystallization rate such as crystallization temperature and concentration of sulfate ion have been investigated.Results indicated that temperature and concentration of sulfate ion have obvious effects on crystallization rate of (NH4)2SO4.Suitable temperature was 25 ℃, and the higher the concentration of sulfate ion, the higher the crystallization rate of (NH4)2 SO4.关键词
磷石膏/硫酸铵/溶析结晶分类
化学化工引用本文复制引用
何东升,张泽强,张汉泉,池汝安..磷石膏制取硫酸铵及其溶析结晶[J].武汉工程大学学报,2011,33(3):12-15,4.基金项目
湖北省自然科学基金创新团队项目 （）
国家自然科学基金重点项目(50834006) （50834006）
教育部创新团队项目(IRT0974) （IRT0974）
