Stabilized fuel slurry
AssigneeInterlake, Inc.
InventorsLouis Allen Marlin, Victor D. Beaucaire
Life of this patent
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Abstract
A method of preparing a stabilized fuel slurry is disclosed wherein a petroleum fuel oil is mixed with run of the mine coal and with an emulsifier, which is capable of forming a thixotropic water external-oil high internal phase emulsion. The slurry is mechanically mixed to comminute the coal to produce a stabilized fuel slurry with coal particles having diameters as large as about 1/4 inch. The slurry is injected through lances into a blast furnace, the lances may provide concentric streams of slurry and steam. The slurry may also be used in other fuel burning furnaces such as boilers, cement kilns, etc.
Claims12
A method of preparing a stabilized fuel slurry having liquid fuel oil present in the range of from about 30% by weight to about 70% by weight, solid fuel particles with diameters as large as about 1/4 inch present in the range of from about 25% by weight to about 65% by weight, water present in the range of from about 2% by weight to about 30% by weight and an emulsifier capable of forming a thixotropic water external-oil high internal phase emulsion present in the range of from about 0.2% by weight to about 5% by weight, said method comprising providing a liquid fuel oil adding an emulsifier and solid fuel particles having diameters as large as about 2 inches and water to the liquid fuel oil, and agitating the solid fuel particles with the water, liquid fuel oil and emulsifier to form a thixotropic water external-high internal phase emulsion and to comminute the solid fuel particles in a liquid environment and to form a stabilized fuel slurry having solid fuel particles with diameters as large as about 1/4 inch.
A method of preparing a stabilized fuel slurry having a petroleum present in the range of from about 30% by weight to about 70% by weight, coal particles with diameters as large as about 1/4 inch present in the range of from about 25% by weight to about 65% by weight, water present in the range of from about 2% by weight to about 30% by weight and an emulsifier capable of forming a thixotropic water external-oil high internal phase emulsion present in the range of from about 0.2% by weight to about 5% by weight, said method comprising providing a liquid petroleum oil, adding an emulsifier and water to the petroleum oil, mixing the petroleum oil and the emulsifier and the water for a period of at least about 1 minute to form the thixotropic water external-oil high internal phase emulsion, adding coal particles with diameters as large as about 2 inches to the emulsion, and mechanically mixing the emulsion and the coal particles for a period of time in the range of from about ten minutes to about thirty minutes to comminute the coal particles and to form a stabilized slurry having coal particles with diameters as large as about 1/4 inch.
Dependencies are inferred from the claim text.