US1518854A - Method of operating blast furnaces - Google Patents
Method of operating blast furnaces Download PDFInfo
- Publication number
- US1518854A US1518854A US401751A US40175120A US1518854A US 1518854 A US1518854 A US 1518854A US 401751 A US401751 A US 401751A US 40175120 A US40175120 A US 40175120A US 1518854 A US1518854 A US 1518854A
- Authority
- US
- United States
- Prior art keywords
- oxygen
- fuel
- steam
- blast
- operating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
Definitions
- the present invention relates to a method of operating blast furnaces and 1s applicable generally wherever blasts of oxygen or air enriched with oxygen are m ected into a furnace containing the material to he treated and solid fuel.
- 1t 1s preferred to introduce steam in or near the blast.
- the quantity of steam is made sufliclent to cool the fuel first encountered by the oxy en at the tuyere nozzle, the effect being to elay the heat generation until the our rent has passed away from the tuyere and thus to protect it and also to protect the injection apparatus for the powdered fuel or liquid fuel when such apparatus 1s present.
- l/Vhen using such fuels moreover, I prefer to employ a jet of steam as the best means of injecting them.
- the exposed parts of the tuyeres should be in contact with the steam and not with the oxygen and any convenient arrangement for effecting this is desirable.
- the steam jet which carries the fuel may be of annular form surrounding the jet of oxygen or an additional jet or current of steam may be made toform a protective barrier between the exposed parts and the oxygen. I do not restrict myself to any particular Application filed August 6, 1920. Serial No. 401,751.
- the injectable fuels to which refer constitute a wellunderstood and clearly defined class distinguished by having the peculiar qualities necessary for combustion within the interstices of a blast furnace column.
- Such fuel to he injected must either be gaseous or be liquid or be a solid powdered finely. They must thus be capable of bein scattered by the injection force into liquid globules or solid particles, which are small enough to be carried by the injection current through the fine interstices of a blast furnace column and to mix with the blast and to be consumed quickly by virtue of their small size, before choking these interstices.
- the method of operating a blast furnace which consists in supplying it with the material to be treated and solid fuel also a blast of steam and oxygen or air enriched with oxygen.
- the method of operating a furnace which consists in supplying the material to be treated and solid fuel and injecting an injectable fuel, steam and oxygen or air enriched with oxygen into the interstices of a mass of incandescent solid fuel.
Description
Patented Dec. 9, 1924.
UNITED STATES PATENT OFFICE.
METHOD OF OPERATING BLAST FURNACES.
No Drawing.
T 0 all whom it may concern:
Be it known that I, EDMUND B. KIRBY, a
citizen of the United. States, residin at New York city, in the county of New ork and State of New York, have inventeda certain new and useful Improvement in Methods of Operating Blast Furnaces, of which the following is a full, clear, and exact description.
The present invention relates to a method of operating blast furnaces and 1s applicable generally wherever blasts of oxygen or air enriched with oxygen are m ected into a furnace containing the material to he treated and solid fuel.
In my patent application 358,9 69, filed February 16, 1920, I have described 1mprovements in the operation of blast furnaces which involved the use of a blast of oxygen or air enriched with oxygen and which also permit the use, when desired, of injectable fuel such as fluid fuel or powdered fuel. I have invented further methods 1n the details of applying these improvements as follows:
In order to aid in protecting the tuyeres from the high and quick temperatures developed by a blast of oxygen or an enriched with oxygen, particularlywhen powdered fuel or liquid fuel are in ected, 1t 1s preferred to introduce steam in or near the blast.
The quantity of steam is made sufliclent to cool the fuel first encountered by the oxy en at the tuyere nozzle, the effect being to elay the heat generation until the our rent has passed away from the tuyere and thus to protect it and also to protect the injection apparatus for the powdered fuel or liquid fuel when such apparatus 1s present. l/Vhen using such fuels moreover, I prefer to employ a jet of steam as the best means of injecting them.
To make the protection most effective, the exposed parts of the tuyeres should be in contact with the steam and not with the oxygen and any convenient arrangement for effecting this is desirable. For instance, the steam jet which carries the fuel may be of annular form surrounding the jet of oxygen or an additional jet or current of steam may be made toform a protective barrier between the exposed parts and the oxygen. I do not restrict myself to any particular Application filed August 6, 1920. Serial No. 401,751.
arrangement or to any form of tuyere and in ection apparatus as a large variety of these are known in the art.
Even where metal surfaces are not exposed but refractory materials are used, it will still be of advantage to protect them by utilizing the steam in the above manner.
It may be ex lained that the injectable fuels to which refer constitute a wellunderstood and clearly defined class distinguished by having the peculiar qualities necessary for combustion within the interstices of a blast furnace column.
Such fuel to he injected must either be gaseous or be liquid or be a solid powdered finely. They must thus be capable of bein scattered by the injection force into liquid globules or solid particles, which are small enough to be carried by the injection current through the fine interstices of a blast furnace column and to mix with the blast and to be consumed quickly by virtue of their small size, before choking these interstices.
For convenience, therefore, I shall refer to all such fuels as injectable fuel.
Having described my invention, I claim:
1. The method of operating a blast furnace which consists in supplying it with the material to be treated and solid fuel also a blast of steam and oxygen or air enriched with oxygen.
2. The method of operatin a blast furnace which consists in supp ying it with the material to be treated and solid fuel also a blast of steam and oxygen or air enriched with oxygen, the steam or a part of it being so introduced as to occupy the space between the oxygen and the exposed parts of the tuyeres.
3. The method of operatin a blast furnace which consists in supp ying it with the material to be treated and injecting steam, injectable fuel and oxygen or air enriched with oxygen.
4. The method of operating a furnace which consists in supplying it with the material to be treated and injecting steam, in-
jectable fuel and oxygen or air enriched with oxygen.
5. The method of operating a furnace which consists in supplying the material to be treated and injecting powdered or injectable fuel, steam and oxygen or air en- 'riched with oxygen,
the steam or a part of it being sol introduced as to occupy the space between the oxygen and the exposed I parts of the injection apparatus.
6. The method of operating a furnace which consists in supplying the material to be treated and injecting injectable fuel, oxygen or air enriched with oxygen and a protecinert to said present.
. The method of operating a furnace which consists in supplying the material to be treated and solid fuel and injecting an injectable fuel, steam and oxygen or air enriched with oxygen into the interstices of a mass of incandescent solid fuel.
In testimony whereof, I hereunto affix my signature.
parts and also to the oxygen EDMUND B. K'IRBY.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US401751A US1518854A (en) | 1920-08-06 | 1920-08-06 | Method of operating blast furnaces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US401751A US1518854A (en) | 1920-08-06 | 1920-08-06 | Method of operating blast furnaces |
Publications (1)
Publication Number | Publication Date |
---|---|
US1518854A true US1518854A (en) | 1924-12-09 |
Family
ID=23589082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US401751A Expired - Lifetime US1518854A (en) | 1920-08-06 | 1920-08-06 | Method of operating blast furnaces |
Country Status (1)
Country | Link |
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US (1) | US1518854A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2560471A (en) * | 1946-03-21 | 1951-07-10 | Platon Jean Georges | Manufacture of cast iron |
US2605180A (en) * | 1948-12-07 | 1952-07-29 | Koppers Co Inc | Method and apparatus for the production of iron |
US2650161A (en) * | 1949-02-05 | 1953-08-25 | Koppers Co Inc | Production of iron in a blast furnace |
US2729555A (en) * | 1952-06-05 | 1956-01-03 | Earl H Shipley | Method of operating blast furnaces |
US2735758A (en) * | 1956-02-21 | strassburger | ||
US2778018A (en) * | 1952-10-03 | 1957-01-15 | Nat Steel Corp | Method of and apparatus for operating metallurgical furnaces |
US2938782A (en) * | 1956-04-24 | 1960-05-31 | Commw Engineering Corp | Method and operation of blast furnaces and metallurgical fuels therefor |
US3110584A (en) * | 1960-06-27 | 1963-11-12 | Exxon Research Engineering Co | Liquid fuel injection in blast furnaces |
DE1190967B (en) * | 1953-12-03 | 1965-04-15 | Strico Ges Fuer Metallurg Und | Process for iron extraction from iron ores in a shaft furnace operated with a hot wind |
US3197305A (en) * | 1962-01-15 | 1965-07-27 | Colorado Fuel & Iron Corp | Iron blast furnace fuel injection |
US3347660A (en) * | 1960-11-28 | 1967-10-17 | Union Carbide Corp | Method for refining metals |
US3364009A (en) * | 1964-03-12 | 1968-01-16 | Kemmetmuller Roland | Method for the production of iron and steel |
WO1986005520A1 (en) * | 1985-03-14 | 1986-09-25 | British Steel Corporation | Improvements in or relating to ironmaking by means of a smelting shaft furnace |
EP0278221A1 (en) * | 1987-01-09 | 1988-08-17 | Nippon Kokan Kabushiki Kaisha | Tuyere of blast furnace |
WO1993009254A1 (en) * | 1991-11-04 | 1993-05-13 | Kortec Ag | Method and device for protecting a blowing device fitted in the hot-blast main of a blast furnace |
-
1920
- 1920-08-06 US US401751A patent/US1518854A/en not_active Expired - Lifetime
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2735758A (en) * | 1956-02-21 | strassburger | ||
US2560471A (en) * | 1946-03-21 | 1951-07-10 | Platon Jean Georges | Manufacture of cast iron |
US2605180A (en) * | 1948-12-07 | 1952-07-29 | Koppers Co Inc | Method and apparatus for the production of iron |
US2650161A (en) * | 1949-02-05 | 1953-08-25 | Koppers Co Inc | Production of iron in a blast furnace |
US2729555A (en) * | 1952-06-05 | 1956-01-03 | Earl H Shipley | Method of operating blast furnaces |
US2778018A (en) * | 1952-10-03 | 1957-01-15 | Nat Steel Corp | Method of and apparatus for operating metallurgical furnaces |
DE1190967B (en) * | 1953-12-03 | 1965-04-15 | Strico Ges Fuer Metallurg Und | Process for iron extraction from iron ores in a shaft furnace operated with a hot wind |
US2938782A (en) * | 1956-04-24 | 1960-05-31 | Commw Engineering Corp | Method and operation of blast furnaces and metallurgical fuels therefor |
US3110584A (en) * | 1960-06-27 | 1963-11-12 | Exxon Research Engineering Co | Liquid fuel injection in blast furnaces |
US3347660A (en) * | 1960-11-28 | 1967-10-17 | Union Carbide Corp | Method for refining metals |
US3197305A (en) * | 1962-01-15 | 1965-07-27 | Colorado Fuel & Iron Corp | Iron blast furnace fuel injection |
US3364009A (en) * | 1964-03-12 | 1968-01-16 | Kemmetmuller Roland | Method for the production of iron and steel |
WO1986005520A1 (en) * | 1985-03-14 | 1986-09-25 | British Steel Corporation | Improvements in or relating to ironmaking by means of a smelting shaft furnace |
US4921532A (en) * | 1985-03-14 | 1990-05-01 | British Steel Corporation | Ironmaking by means of a smelting shaft furnace |
EP0278221A1 (en) * | 1987-01-09 | 1988-08-17 | Nippon Kokan Kabushiki Kaisha | Tuyere of blast furnace |
US4887800A (en) * | 1987-01-09 | 1989-12-19 | Nippon Kokan Kabushiki Kaisha | Tuyere of blast furnace |
WO1993009254A1 (en) * | 1991-11-04 | 1993-05-13 | Kortec Ag | Method and device for protecting a blowing device fitted in the hot-blast main of a blast furnace |
US5403378A (en) * | 1991-11-04 | 1995-04-04 | Kortec Ag | Method and apparatus for protecting an injection device disposed in a hot blast conduit of a blast furnace |
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