PREVENTION OF SPONTANEOUS COMBUSTION OF COAL AND COAL SUBJECTED TO PREVENTION TREATMENT OF SPONTANEOUS COMBUSTION

PROBLEM TO BE SOLVED: To prevent the spontaneous combustion of low grade coals at a low cost. SOLUTION: Coal is granulated in a modification pretreatment system 1, followed by pulverization with water to obtain a slurry preparatory to modification. The slurry is retained at 200-350 deg.C and 70-150...

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Bibliographische Detailangaben
Hauptverfasser:	TSURUI MASAO, TOKUDA SHINICHI, SHIBATA KAZUHIRO, SUYAMA CHIAKI, SHIMAMURA MANABU, YANAGIMACHI HARUMITSU
Format:	Patent
Sprache:	eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL CHEMISTRY FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR LIQUEFIED PETROLEUM GAS LUBRICANTS METALLURGY NATURAL GAS PEAT PETROLEUM, GAS OR COKE INDUSTRIES SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the spontaneous combustion of low grade coals at a low cost. SOLUTION: Coal is granulated in a modification pretreatment system 1, followed by pulverization with water to obtain a slurry preparatory to modification. The slurry is retained at 200-350 deg.C and 70-150 kg/cm2 for a defined period of time in a modification system 2 to obtain a slurry of improved coals. The improved coal slurry is scattered on a coal stockpile 4 the inside of which is made to be flame retardant by the permeation of filtrate from the slurry and on the outer layer of which a preventive layer 41 of ignition is formed by pulverized coals. In addition, when crushing various kinds of coals, the slurry of improved coals may be scattered thereon.