US3626501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for injecting fluid fuel into a blast furnace
Assignee: Atlantic Richfield Co
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Filing: 1969-12-11
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Granted: 1971-12-07
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Expires: 1989-12-11
Abstract
Abstract System for the injection of fluid hydrocarbon fuels into a bast furnace through an injection lance mounted in a tuyere for injecting the fluid fuel into the hot airblast of the tuyere.
Inventors
- 👤 Roger B Baird
- 👤 Frank J Bruns
- 👤 Barney Vallino Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:15
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/001
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
138 words
In a blast furnace having at least one tuyere in a wall thereof and means for supplying a hot airblast to said tuyere, the improvement of apparatus for injecting a fluid fuel into said hot air blast through a part of said furnace at said tuyere having an opening therein, comprising an injection lance, guide means attached to said part over said opening including means for supporting said lance and means for preventing flow from said furnace through said opening, said lance being removably inserted into said airblast through said guide means and said opening, said means for supporting said lance being a guide pipe having an inside diameter larger than the outside diameter of said lance and said means for preventing flow being a ball valve means connected to said guide pipe through which said lance extends.
Claim 2
Dependent Claim
138 words
In a blast furnace having at least one tuyere in a wall thereof and means for supplying a hot airblast to said tuyere, the improvement of apparatus for injecting a fluid fuel into said hot air blast through a part of said furnace at said tuyere having an opening therein, comprising an injection lance, guide means attached to said part over said opening including means for supporting said lance and means for preventing flow from said furnace through said opening, said lance being removably inserted into said airblast through said guide means and said opening, said means for supporting said lance being a guide pipe having an inside diameter larger than the outside diameter of said lance and said means for preventing flow being a ball valve means connected to said guide pipe through which said lance extends.
Claim 3
Dependent Claim
26 words
Improvement of claim 1 wherein said part is a blowpipe attached at said tuyere and forming a part of said means for supplying a hot airblast.
Claim 4
Dependent Claim
10 words
Improvement of claim 1 wherein said part is the tuyere.
Claim 5
Dependent Claim
26 words
Improvement of claim 1 wherein said part is a tuyere nose attached to said tuyere and said opening is a passage extending through said tuyere nose.
Claim 6
Dependent Claim
24 words
The apparatus of claim 1 wherein said guide means further includes means for adjusting the effective length of said lance on said guide means.
Claim 7
Dependent Claim
23 words
The apparatus of claim 1 wherein said guide means further includes means for adjusting the angular position of said lance in said opening.
Claim 8
Dependent Claim
42 words
The apparatus of claim 6 wherein said last-mentioned means includes a ball joint means supporting said lance and said valve means, said lance extending through said ball joint means, and means for securing said ball joint means in any desired angular position.
Claim 9
Dependent Claim
41 words
The apparatus of claim 1 further including means for adjusting the effective length of said lance comprising means for supporting said lance exteriorly of said ball valve means and removable spacer means between said supporting means and said ball valve means.
Claim 10
Dependent Claim
26 words
The apparatus of claim 8 wherein said spacer means is a pipe surrounding said lance and said supporting means includes a packing gland surrounding said lance.
Claim 11
Dependent Claim
58 words
The apparatus of claim 9 further including means for adjusting the angular position of said lance in said opening comprising ball joint means supporting said lance and said valve means at the free end of guide means, said lance extending through said ball joint means, and means for securing said ball joint means in any desired angular position.
Claim 12
Dependent Claim
106 words
In a blast furnace having at least one tuyere in a wall thereof and means for supplying a hot airblast to said tuyere, the improvement of apparatus for injecting a fluid fuel into said hot airblast through a part of said furnace at said tuyere having an opening therein, comprising an injection lance, guide means attached to said part of said opening including means for supporting said lance, means for preventing flow from said furnace through said opening and means for aDjusting the angular position of said lance in said opening, said lance being removably inserted into said airblast through said guide means and said opening.
Claim 13
Dependent Claim
106 words
In a blast furnace having at least one tuyere in a wall thereof and means for supplying a hot airblast to said tuyere, the improvement of apparatus for injecting a fluid fuel into said hot airblast through a part of said furnace at said tuyere having an opening therein, comprising an injection lance, guide means attached to said part of said opening including means for supporting said lance, means for preventing flow from said furnace through said opening and means for aDjusting the angular position of said lance in said opening, said lance being removably inserted into said airblast through said guide means and said opening.
Claim 14
Dependent Claim
42 words
In apparatus of claim 11 wherein said last-mentioned means includes a ball joint means supporting said lance and said valve means, said lance extending through said ball joint means, and means for securing said ball joint means in any desired angular position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |