METHOD AND DEVICE FOR MODIFYING FLY ASH

• Main Authors: KAKIZONO KENICHI, OMURA KOHEI, KAWANO TAKESHI, SEKI TAKUYA
• Format: Patent
• Language: Chinese; English
• Published: 27.10.2020
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMBUSTION APPARATUS; COMBUSTION PROCESSES; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; DISPOSAL OF SOLID WASTE; FLUES; HEATING; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; MILLING GRAIN; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL,e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL; PERFORMING OPERATIONS; PREPARATORY TREATMENT OF GRAIN FOR MILLING; RECLAMATION OF CONTAMINED SOIL SOIL; REFRACTORIES; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; SEPARATING SOLIDS FROM SOLIDS; SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS; SLAG; SORTING; TRANSPORTING; TREATMENT OF NATURAL STONE; WEAPONS

The method for modifying fly ash according to the present invention comprises: a heating step for heating raw fly ash powder containing unburned carbon to a temperature of 780-1000 DEG C to reduce theamount of unburned carbon contained in the raw fly ash powder; a classifying step for introducing the thermally-treated fly ash obtained by the heating step and having a reduced amount of unburned carbon, into a classifying device with the fly ash kept at a high temperature, and separating the fly ash into coarse powder and fine powder; a fine powder-collecting step for collecting the fine powderof the thermally-treated fly ash obtained in the classifying step, using a dust collector; and a pulverizing and collecting step for pulverizing the coarse powder of the thermally-treated fly ash obtained in the classifying step to the extent that the amount of 45[mu]m sieve residues thereof is 34 mass% or less, and collecting the resulting powder. 本发明的飞灰的改性方法包括以下工序。加热工序，将含有未燃碳的飞灰原粉加热至780～1000℃的温度，使该飞灰原粉中所含的未燃碳量降低；分级工序，将由