Ceramic burners
Abstract
Abstract A ceramic burner for hot blast stoves for blast furnaces. A ceramic block has a central hole and a crown of holes surrounding it. A vertical conduit feeds gaseous fie; and a second coaxial conduit supplies combustion air. The conduits have their upper ends passing through the holes. The upper surface of the block slants upwardly from the central hole and the holes of said crown are directed toward the prolonged axis of the central hole. The central hole has essentially the shape of a rectangular slot and the sloping part of the upper surface of the block comprising essentially two flat surfaces which comprise an angle of 40*120*, and the crown of holes is subdivided into two rows of holes running parallel to each other and to the longitudinal sides of said central hole. The rectangular shape of the central hole shows a ratio of length versus width between 4:1 and 6:1 and the slot width is less than 600 mm. Each of the two rows of holes has at least four holes the middle axis of which form together with the prolongation of the axis of the central hole an angle ranging from 20* to 70*.
Inventors
- 👤 Jacobus Van Laar
- 👤 Johannes H W Ouwerkerk
Bibliographic Details
Claims Analysis
Total Claims: 10References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |