添加剂对CO还原分解磷石膏的影响  

Effect of Additives on the Reductive Decomposition of Phosphogypsum with CO

作　　者：谢龙贵[1] 马丽萍[1] 戴取秀[1] 毛宇[1] 张杭[1] 资泽城[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《材料导报》2013年第16期118-122,共5页Materials Reports

基　　金：国家自然科学基金(21176108);国家高技术发展计划"863"项目(2011AA06A106)

摘　　要：采用CaCl2、Fe2O3、MgO作为添加剂按一定比例分别与磷石膏混合,在3%CO的弱还原性气氛下,研究了添加剂的量、反应时间对磷石膏分解率和分解温度的影响。结果表明:在添加CaCl2、Fe2O3的情况下,分解率达到85%以上,反应温度只需达到950℃即可,这比不添加添加剂时磷石膏的分解温度低了100℃,在保证了分解率的同时有效降低了磷石膏的分解温度;而相同条件下添加MgO对磷石膏的分解效果并无明显影响。The effect of the reaction time and the amount of additives on the decomposition rate and temperature of phosphogypsum were studied in the weak reducing atmosphere of 3vo1% CO by using the mixture of phosphogyp- sum and a certain percentage of CaC12, Fe2O3 and MgO additives. The result shows that the decomposition rate of phosphogypsum reached 85% by adding CaC12 and Fe2O3, and the decomposition temperature of phosphogypsum was only 950 ℃ which was 100 ℃; lower than the one of decomposition reaction of phosphogypsum without any additives. And the addition of MgO had no significant effects on the decomposition of phosphogypsum under the same condition.

关 键 词：磷石膏 一氧化碳低温分解 

分 类 号：TQ132.32[化学工程—无机化工]