快速流化床煅烧温度对脱硫石膏性能的影响
发布时间:2018-06-03 20:12
本文选题:快速流化床 + 脱硫石膏 ; 参考:《新型建筑材料》2017年02期
【摘要】:为提高脱硫石膏煅烧效率及产品质量,设计了一种新型快速流化床煅烧装置。在14.5 m/s的操作流化风速下,对不同煅烧温度条件下脱硫石膏性能进行了分析,以便确定最佳的操作条件。试验结果表明:提高煅烧温度至386℃时,原状脱硫石膏脱水率接近100%;当煅烧温度高于250℃后,脱水脱硫石膏的矿相由CaSO_4·0.5H_2O和CaSO_4·0.67H_2O两相构成。416℃范围内没有发现AⅡ-CaSO_4相存在。煅烧温度与脱水脱硫石膏比表面积、标准稠度用水量均呈线性关系。煅烧温度提高后脱水脱硫石膏再水化硬化体致密性显著增加,试样力学性能同样得以提高。当快速流化床煅烧温度为386℃,脱硫石膏脱水率可达99.3%,力学性能最佳。
[Abstract]:In order to improve the calcination efficiency and product quality of desulphurized gypsum, a new type of fast fluidized bed calcinator was designed. The performance of desulphurized gypsum at different calcination temperature was analyzed at 14.5 m / s operating fluidization velocity in order to determine the best operating conditions. The results show that the dehydration rate of undisturbed desulphurized gypsum is close to 100 when the calcination temperature is up to 386 鈩,
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