TREATMENT METHOD OF COAL ASH

To provide a treatment method of coal ash capable of improving flow value ratio and an activity index by classifying or pulverizing the coal ash when using the coal ash as a cement admixture.SOLUTION: A treatment method of coal ash includes the steps of: supplying air having a dew point of -40°C to...

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Bibliographische Detailangaben
Hauptverfasser:	KOBAYAKAWA MAKOTO, IZUMI KAZUSHI, KIMURA TAKAYUKI, CHIBA HIROMI, IYASAKA KOICHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DISPOSAL OF SOLID WASTE LIME, MAGNESIA METALLURGY OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL,e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL RECLAMATION OF CONTAMINED SOIL SOIL REFRACTORIES SEPARATING SOLIDS FROM SOLIDS SEPARATION SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS SLAG SORTING TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	To provide a treatment method of coal ash capable of improving flow value ratio and an activity index by classifying or pulverizing the coal ash when using the coal ash as a cement admixture.SOLUTION: A treatment method of coal ash includes the steps of: supplying air having a dew point of -40°C to -25°C to the coal ash to dry the coal ash until relative humidity of air coming in contact with the coal ash falls in a range of 5% to 30% and until a dew point of the air coming in contact with the coal ash falls in a range of -20°C to 0°C; and then classifying the coal ash.SELECTED DRAWING: Figure 1 【課題】セメント混和材として石炭灰を使用するにあたり、分級や粉砕することにより、フロー値比及び活性度指数を改善できる石炭灰の処理方法を提供することを目的とする。【解決手段】石炭灰に露点が−４０℃〜−２５℃である空気を供給して、石炭灰に接する空気の相対湿度が５％〜３０％の範囲まで、かつ、石炭灰に接する空気の露点が−２０℃〜０℃の範囲となるまで乾燥する工程、その後、前記石炭灰を分級する工程を含むことを特徴とする石炭灰の処理方法。【選択図】図１