Patent US3554515A successfully refreshed from Google Patents.
US3554515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste heat recovery apparatus for flash smelting furnace
Assignee: Furukawa Mining Co Ltd
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Filing: 1968-05-03
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Granted: 1971-01-12
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Expires: 1988-05-03
Abstract
Abstract According to the present invention, a flash smelting furnace is provided with a radiation boiler for cooling high-dust-content, hot waste gas generated in the furnace down to a relatively low temperature, and an arrangement for utilizing the low temperature waste gas obtained for gaseous conveying drying of fine ore to be charged into the furnace.
Inventors
- 👤 Kazuo Tonooka
- 👤 Kazuo Yokomatu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:01
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/12; C22B5/14; Y; Y10; Y10S; Y10S75/00; Y10S75/958
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
Waste heat recovery apparatus according to claim 1 wherein said cyclone device is provided with means for discharging said separated fine ore into said furnace.
Claim 2
Dependent Claim
73 words
Waste heat recovery apparatus according to claim 1 wherein said cyclone device is provided with means for introducing the gas separated from the fine ore into an electric dust collector, said last mentioned gas containing extremely fine ore and flue dust, and said cyclone device is further provided with means for charging said extremely fine ore and flue dust removed from the last mentioned gas in the electric dust collector into said furnace.
References Cited (Backward Citations)
US1755845A
Cited
US1984727A
Cited
US3042498A
Cited
US2846300A
Cited
US3320049A
Cited
US3384475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |