FLOTATION METHOD OF PULVERIZED COAL, PULVERIZED COAL SURFACE MODIFICATION APPARATUS, AND FLOTATION SYSTEM OF PULVERIZED COAL

• Main Authors: ABE KAZUO, KIMOTO KOSUKE, MURATA TOSHIAKI
• Format: Patent
• Language: English
• Published: 20.05.2004
• Edition: 7
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; DIFFERENTIAL SEDIMENTATION; FIRELIGHTERS; FLOTATION; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; METALLURGY; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a floatation method or the like of pulverized coal capable of imparting floating a property even to pulverized coal whose bonding force to oil drops is weak, that is [H/C×100] value is ≤80, to be impossible to apply the floatation method heretofore thereby applying the floatation method, and reducing the quality of oil to be used in a pulverized coal precipitation. SOLUTION: The floatation method of coal for recovering the pulverized coal (c) from coal slurry S2 containing fine powdery coal having [H/C×100] value of 0-80 and ≤0.5 mm particle diameter is constituted so as to include a oil addition process for adding floatation oil A to the coal slurry S2, a shearing process for rapidly stirring the coal slurry S2 to impart a shearing force to the pulverized coal and the oil drops (a) of the floatation oil A and a floatation process for floating the pulverized coal (c) after the shearing process to clean and recover. COPYRIGHT: (C)2004,JPO