利用脱硫石膏制备α-半水石膏的蒸压制度研究  

Autoclaved System Research of Calcium Sulfate Prepared with Desulfurization Gypsum

作　　者：陈勇[1] 张毅[2] 李东旭[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009 [2]安徽工业大学材料科学与工程学院,马鞍山243011

出　　处：《硅酸盐通报》2015年第5期1241-1245,共5页Bulletin of the Chinese Ceramic Society

基　　金："十二五"国家科技支撑计划课题(2014BAL03B04)

摘　　要：使用脱硫石膏做原料,利用动态水热法制备α-半水石膏,通过测定试样的XRD、TG-DSC、粒度等微观性能以及试样中α-半水石膏含量,分析蒸压制度的影响。结果表明,利用动态水热法制备α-半水石膏的时候,石膏的相转变温度在105-110℃之间,但是130℃以上转变速率较快;在130℃蒸压时完全转变成为半水石膏需要3 h左右;料浆浓度20%-30%之间,搅拌棒速率控制在150 r/min左右,对石膏的粒径分布较好。This paper studied to prepare α-calcium sulfate hemihydrate using desulfurization gypsum with dynamic hydrothermal method. XRD, TG-DSC, particle size, the content of α-calcium sulfate hemihydrate and other properties of micro were tested to analyse influence of preparation system. The results show that the phase transition temperature is between 105-110 ℃, the rate of phase transition will accelerate when the temperature is above 130 ℃. It will cost about 3 h that calcium sulfate dihyrate turns into calcium sulfate hemihydrate. The slurry concentration between 20%-30% and the stirring rod rate controlled in 150 r/min are good for the distribution of gypsum particle size.

关 键 词：脱硫石膏 Α-半水石膏 蒸压制度 工艺参数 

分 类 号：TQ177[化学工程—硅酸盐工业]