会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 10. 发明公开
    • Process for producing gypsum flake from flue gas desulfurization
    • Verfahren zur Herstellung von Gipsflocken aus Rauchgasentschwefelung。
    • EP0534458A1
    • 1993-03-31
    • EP92116440.6
    • 1992-09-25
    • AIR PRODUCTS AND CHEMICALS, INC.
    • Welliver, William RussellRoth, Timothy JayGagliardi, Carmin Richard
    • C01F11/46C04B11/26B28B3/12
    • C04B11/268C01F11/464C01P2004/61C04B11/264
    • This invention relates to an improved process for producing gypsum calcium sulfate dihydrate flakes from powdered gypsum calcium sulfate dihydrate obtained from the desulfurization of flue gas by the wet limestone process. The flakes have sufficient size and strength such that the gypsum calcium sulfate dihydrate can be handled and processed in conventional equipment commonly used by wallboard manufacturers and others in the construction industry. The intermediate calcium sulfate dihydrate from the desulfurization process is dewatered to about 5 to 12% by weight and then compressed into a thin sheet under a compaction or compression load of 4 tons force to 15 tons force per linear inch of sheet width. A linear speed of from 0.5 to 2.5 feet per second is maintained during compaction providing a compaction residence time of from about 0.2 to 1.2 seconds. An elevated temperature is maintained during the compaction process to enhance the reformation of the crystal size and shape of the gypsum calcium sulfate dihydrate.
      The combination of pressure and temperature on the moist gypsum calcium sulfate dihydrate alters the physical characteristics of the gypsum calcium sulfate dihydrate, thereby resulting a sheet which breaks into hard flakes on exit from the compaction zone.
    • 本发明涉及从通过湿法石灰石法从烟道气脱硫得到的粉状石膏硫酸钙二水合物制备石膏硫酸钙二水合物片的改进方法。 薄片具有足够的尺寸和强度,使得石膏硫酸钙二水合物可以在墙板制造商和其他建筑行业常用的常规设备中处理和加工。 来自脱硫过程的中间体硫酸钙二水合物脱水至约5至12重量%,然后在4吨力的压实或压缩载荷下压制成薄片至每线性英寸片材宽度15吨的力。 在压实期间维持0.5至2.5英尺每秒的线速度,提供约0.2至1.2秒的压实停留时间。 在压实过程中保持升高的温度以增强石膏硫酸钙二水合物的晶体尺寸和形状的改变。 湿润石膏硫酸钙二水合物的压力和温度的组合改变了石膏硫酸钙二水合物的物理特性,从而导致在压实区域出口时破碎成硬片的片材。