DESULFURIZATION AND DEASHING OF COAL USING MICROORGANISM

Japanese Patent JP3385424

B2

PURPOSE: To surely perform the desulfurization and deashing of coal in high efficiency using a small amount of microorganism without using a flotation reagent by contacting a mixture of powdered coal and water with Thiobacillus ferrooxidans known as an iron-oxidizing bacterial strain.
CONSTITUTION: A coal flotation apparatus 1 to be used in the present process has a cylindrical glass column 2 having a glass filter 3 attached to the bottom. The column 2 is filled with a flotation liquid 4 containing suspended cells of Thiobacillus ferrooxidans ATCC 23270 strain and the liquid is incorporated with a foaming agent such as methylisobutyl carbinol and stirred. High-sulfur coal is charged into the column from above and stirred for a prescribed period to contact the coal with the microorganism, air is supplied with an air pump 5 at a flow rate controlled with a flow meter 6 to 1.0ml/min and washing water 8 is supplied from the water-supplying part 7 to the column to perform the coal flotation. A mixture of powdered coal and water discharged from the top of the column 2 is separated into froth 9 and tail 11 and the tail 11 is recovered and dried to effect the sure desulfurization and deashing of coal in high efficiency without using a flotation reagent.

JPS6014077	[Title of the Invention] An additive agent for dust coal-oil mixtures
JPS6033872	[Title of the Invention] An additive agent for dust coal-oil mixtures

Naoya Ohmura
Keiko Kitamura
Hiroshi Saiki

JP22328592A

March 10, 2003

July 30, 1992

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CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY

C10L1/32; C10L9/00; C12S1/02; (IPC1-7): C10L1/32; C10L9/00

JP62208270A
JP6475590A
JP6239636B1

Nobuo Kaida (2 outside)

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