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METHOD FOR RECOVERING DIHYDRATE GYPSUM FROM WASTE GYPSUM BOARD
To provide a method for recovering dihydrate gypsum from a waste gypsum board that rapidly disperses gypsum grains into water by suppressing foaming when loading the gypsum grains into the water.SOLUTION: A method for recovering dihydrate gypsum from a waste gypsum board includes the steps of: calcining and converting gypsum derived from a gypsum board into hemihydrate gypsum grains and/or type III anhydrous gypsum grains; controlling temperature of the gypsum grains to 90°C or higher immediately before loading it into water, and mixing with water to form gypsum slurry; and precipitating dihydrate gypsum particles in the gypsum slurry.SELECTED DRAWING: Figure 1
【課題】石膏粒体を、水中に投入する際に、起泡を抑制し、石膏粒体を速やかに水中に分散させる、廃石膏ボードからの二水石膏の回収方法の提供。【解決手段】石膏ボード由来の石膏をか焼し半水及び／又は無水III型の石膏粒体とし、水中への投入直前の石膏粒体の温度を９０℃以上として水と混合して石膏スラリーとし、石膏スラリー中に二水石膏粒子を析出させる、廃石膏ボードからの二水石膏の回収方法。【選択図】図１
METHOD FOR RECOVERING DIHYDRATE GYPSUM FROM WASTE GYPSUM BOARD
To provide a method for recovering dihydrate gypsum from a waste gypsum board that rapidly disperses gypsum grains into water by suppressing foaming when loading the gypsum grains into the water.SOLUTION: A method for recovering dihydrate gypsum from a waste gypsum board includes the steps of: calcining and converting gypsum derived from a gypsum board into hemihydrate gypsum grains and/or type III anhydrous gypsum grains; controlling temperature of the gypsum grains to 90°C or higher immediately before loading it into water, and mixing with water to form gypsum slurry; and precipitating dihydrate gypsum particles in the gypsum slurry.SELECTED DRAWING: Figure 1
【課題】石膏粒体を、水中に投入する際に、起泡を抑制し、石膏粒体を速やかに水中に分散させる、廃石膏ボードからの二水石膏の回収方法の提供。【解決手段】石膏ボード由来の石膏をか焼し半水及び／又は無水III型の石膏粒体とし、水中への投入直前の石膏粒体の温度を９０℃以上として水と混合して石膏スラリーとし、石膏スラリー中に二水石膏粒子を析出させる、廃石膏ボードからの二水石膏の回収方法。【選択図】図１
METHOD FOR RECOVERING DIHYDRATE GYPSUM FROM WASTE GYPSUM BOARD
廃石膏ボードからの二水石膏の回収方法
HIRANAKA SHINGO (author) / MATSUO KENTARO (author) / KATAOKA MAKOTO (author)
2020-04-30
Patent
Electronic Resource
Japanese
IPC:
B09B
DISPOSAL OF SOLID WASTE
,
Beseitigung von festem Abfall
/
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C04B
Kalk
,
LIME
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