Patent US4030894A successfully refreshed from Google Patents.
US4030894A
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Stabilized fuel slurry
Assignee: Acme Steel Co
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Filing: 1975-06-30
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Granted: 1977-06-21
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Expires: 1995-06-30
Abstract
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.
Inventors
- 👤 Louis Allen Marlin
- 👤 Victor D. Beaucaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/001; C21B5/003; C21B5/004; C10; C10L; C10L1/00; C10L1/32; C10L1/324
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
181 words
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.
Claim 2
Independent Claim
181 words
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.
Claim 3
Dependent Claim
37 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein the liquid fuel oil is present in the range of between about 30% by weight and about 50% by weight of the slurry.
Claim 4
Dependent Claim
22 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein said liquid fuel oil is a petroleum oil.
Claim 5
Dependent Claim
21 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein said liquid fuel oil is coal tar.
Claim 6
Dependent Claim
31 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein the solid fuel is selected from the class consisting of coal, coal by-products and solid petroleum residuum.
Claim 7
Dependent Claim
37 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein said solid fuel particles are present in the range of from about 50% by weight to about 65% by weight of the slurry.
Claim 8
Dependent Claim
35 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein said solid fuel particles are comminuted until the largest of said particles is no larger than about 1/8 inch in diameter.
Claim 9
Dependent Claim
23 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein the solid fuel particles are comminuted by mechanical mixing.
Claim 10
Dependent Claim
42 words
The method of preparing a stabilized fuel slurry set forth in claim 1, and further comprising maintaining the slurry at a temperature above about 100° F. during the mixing of the liquid fuel oil and the emulsifier and the solid fuel particles.
Claim 11
Dependent Claim
26 words
The method of preparing a stabilized fuel slurry set forth in claim 1, wherein the solid fuel particles are coal and the water is contained therein.
Claim 12
Independent Claim
204 words
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.
Claim 13
Independent Claim
204 words
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.
Claim 14
Dependent Claim
42 words
The method of preparing a stabilized fuel slurry set forth in claim 11, wherein the petroleum oil and the emulsifier and the water and the coal particles are maintained at a temperature of at least about 140° F. during the mixing thereof.
References Cited (Backward Citations)
US3210168A
Cited
US3617095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |