Patent US4233117A successfully refreshed from Google Patents.
US4233117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of abrasion-resistant coke
Assignee: Bergwerksverband GmbH
•
Filing: 1978-09-05
•
Granted: 1980-11-11
•
Expires: 1998-09-05
Abstract
Abstract Bodies are press-molded from a mixture of particulate fuel and a binder. These bodies are heated to a temperature between about 600°-900° C. in a rotary furnace to degas them. The degassing is carried out without subjecting the bodies to mechanical stresses and without permitting combustion of the expelled volatile gases. The resulting shaped coke has a greatly improved abrasion resistance.
Inventors
- 👤 Harald Juntgen
- 👤 Karl Knoblauch
- 👤 Josef Degel
- 👤 Dieter Zundorf
- 👤 Klaus Giessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:45
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/08; Y; Y02; Y02E; Y02E50/00; Y02E50/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
A method of making abrasion-resistant shaped coke, particularly coke for use in adsorbing sulfur oxides from flue gases, comprising the steps of forming a mixture of particulate carbonaceous material and of between 5-35% by weight thereof of a binder for the material; converting the mixture into shaped bodies; introducing the shaped bodies into a rotary furnace having an unobstructed inner cross-section free of entraining elements; and outgassing the shaped bodies in the furnace at between about 500°-900° C. to convert them into coke bodies, the step of outgassing comprising heating the shaped bodies exclusively by heating the furnace at the exterior thereof, and flushing the interior of the furnace with an inert gas to produce in the interior an atmosphere containing at most 5% by volume of oxygen wherein the bodies are heated to a temperature of between about 500°-700° C. while preventing the ignition of the expelled gases and protecting the bodies against exposure to significant mechanical stresses.
Claim 2
Independent Claim
159 words
A method of making abrasion-resistant shaped coke, particularly coke for use in adsorbing sulfur oxides from flue gases, comprising the steps of forming a mixture of particulate carbonaceous material and of between 5-35% by weight thereof of a binder for the material; converting the mixture into shaped bodies; introducing the shaped bodies into a rotary furnace having an unobstructed inner cross-section free of entraining elements; and outgassing the shaped bodies in the furnace at between about 500°-900° C. to convert them into coke bodies, the step of outgassing comprising heating the shaped bodies exclusively by heating the furnace at the exterior thereof, and flushing the interior of the furnace with an inert gas to produce in the interior an atmosphere containing at most 5% by volume of oxygen wherein the bodies are heated to a temperature of between about 500°-700° C. while preventing the ignition of the expelled gases and protecting the bodies against exposure to significant mechanical stresses.
Claim 3
Dependent Claim
20 words
A method as defined in claim 1, wherein all of the carbonaceous material a particle size smaller than 1.0 mm.
Claim 4
Dependent Claim
21 words
A method as defined in claim 1, wherein 90% of the particulate carbonaceous material has a particle size smaller than 90μ.
Claim 5
Dependent Claim
20 words
A method as defined in claim 1, wherein 80% of the particulate fuel has a particle size smaller than 60μ.
Claim 6
Dependent Claim
23 words
A method as defined in claim 1, wherein the binder is selected from the group consisting of bitumen, tar, pitch and synthetic plastics.
Claim 7
Dependent Claim
18 words
A method as defined in claim 1, wherein the furnace is rotated at between 1-6 rotations per minute.
Claim 8
Dependent Claim
18 words
A method as defined in claim 1, wherein the furnace is rotated at between 3-4 rotations per minute.
References Cited (Backward Citations)
US1870901A
Cited
US1950017A
Cited
US2314641A
Cited
US2575587A
Cited
US2556154A
Cited
US2792339A
Cited
US3043753A
Cited
US3171720A
Cited
US3700564A
Cited
US3637464A
Cited
US3838988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |