US3589318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast furnace tuyere openings
Assignee: Individual
•
Filing: 1969-07-31
•
Granted: 1971-06-29
•
Expires: 1989-07-31
Abstract
Abstract A novel construction for the tuyere openings into a blast furnace including four quadrant ceramic cast parts and four carbon block cast parts to replace the conventional more complicated brickwork. The precast parts with a minimum of fitting may be used for all blast furnace sizes commonly used today. The precast parts eliminate the extensive hand fitting of the brickwork required in conventional construction and, as a result, significantly lower the cost in labor and time for tuyere construction and replacement.
Inventors
- 👤 Edwin J Szatkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:03
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A tuyere construction comprising a tuyere cooler having an outer surface, a precast ceramic liner means having a surface abutting said tuyere cooler outer surface, and a precast carbon block means having a surface abutting a second surface of said precast ceramic liner means wherein said respective abutting surfaces match in the as-cast condition.
Claim 2
Dependent Claim
54 words
A tuyere construction comprising a tuyere cooler having an outer surface, a precast ceramic liner means having a surface abutting said tuyere cooler outer surface, and a precast carbon block means having a surface abutting a second surface of said precast ceramic liner means wherein said respective abutting surfaces match in the as-cast condition.
Claim 3
Dependent Claim
26 words
The tuyere construction of claim 1 wherein said tuyere cooler is of a frustoconical shape and said precast ceramic liner means circumferentially abuts said tuyere cooler.
Claim 4
Dependent Claim
17 words
The tuyere construction of claim 2 wherein said carbon block means circumferentially abut said ceramic liner means.
Claim 5
Dependent Claim
23 words
The tuyere construction of claim 1 wherein said ceramic liner means comprises a maximum of four ceramic blocks concentrically surrounding said tuyere cooler.
Claim 6
Dependent Claim
24 words
The tuyere construction of claim 1 wherein said carbon block means comprises a maximum of four carbon blocks concentrically surrounding said ceramic liner means.
Claim 7
Dependent Claim
19 words
The tuyere construction of claim 4 wherein said ceramic blocks each extend substantially the axial length of said tuyere.
Claim 8
Dependent Claim
19 words
The tuyere construction of claim 5 wherein said carbon blocks each extend substantially the axial length of said tuyere.
Claim 9
Dependent Claim
17 words
The tuyere construction of claim 4 wherein each ceramic block is a sector of a frustoconical tube.
Claim 10
Dependent Claim
33 words
The tuyere construction of claim 5 wherein each carbon block has at least two parallel planar faces, two divergent planar faces, and a surface comprising a sector of a frustoconical surface of revolution.
Claim 11
Dependent Claim
65 words
A tuyere construction comprising, a frustoconical tubular tuyere cooler, a plurality of ceramic blocks abutting said tuyere cooler circumferentially, a plurality of carbon blocks concentrically arranged about said tuyere cooler and abutting said ceramic blocks circumferentially, said ceramic blocks and said carbon blades each extending substantially the axial length of said tuyere cooler, and said abutting blocks having abutting surfaces matching in the as-cast condition.
Claim 12
Dependent Claim
65 words
A tuyere construction comprising, a frustoconical tubular tuyere cooler, a plurality of ceramic blocks abutting said tuyere cooler circumferentially, a plurality of carbon blocks concentrically arranged about said tuyere cooler and abutting said ceramic blocks circumferentially, said ceramic blocks and said carbon blades each extending substantially the axial length of said tuyere cooler, and said abutting blocks having abutting surfaces matching in the as-cast condition.
Claim 13
Dependent Claim
56 words
A tuyere construction for incorporation in the cylindrical brick wall of a blast furnace comprising an annular tuyere cooler and precast refractory means having an interior surface matching the exterior surface of said cooler, said precast refractory means having a rectilinear exterior surface matching and facilitating incorporation in a rectilinear opening in said cylindrical brick wall.
Claim 14
Dependent Claim
56 words
A tuyere construction for incorporation in the cylindrical brick wall of a blast furnace comprising an annular tuyere cooler and precast refractory means having an interior surface matching the exterior surface of said cooler, said precast refractory means having a rectilinear exterior surface matching and facilitating incorporation in a rectilinear opening in said cylindrical brick wall.
Claim 15
Dependent Claim
59 words
A tuyere construction for incorporation in the cylindrical brick wall of a blast furnace comprising an annular tuyere cooler and a plurality of precast refractory segments having an interior surface matching the exterior surface of said cooler, said precast refractory segments having a rectilinear exterior surface matching and facilitating incorporation in a rectilinear opening in said cylindrical brick wall.
Claim 16
Dependent Claim
59 words
A tuyere construction for incorporation in the cylindrical brick wall of a blast furnace comprising an annular tuyere cooler and a plurality of precast refractory segments having an interior surface matching the exterior surface of said cooler, said precast refractory segments having a rectilinear exterior surface matching and facilitating incorporation in a rectilinear opening in said cylindrical brick wall.
References Cited (Backward Citations)
US3061300A
Cited
US3396961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |