CN1007431B - Tuyere of blast furnace - Google Patents
Tuyere of blast furnaceInfo
- Publication number
- CN1007431B CN1007431B CN 88100068 CN88100068A CN1007431B CN 1007431 B CN1007431 B CN 1007431B CN 88100068 CN88100068 CN 88100068 CN 88100068 A CN88100068 A CN 88100068A CN 1007431 B CN1007431 B CN 1007431B
- Authority
- CN
- China
- Prior art keywords
- tuyere
- pipe
- burner
- water
- infeed
- 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
Links
Landscapes
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
A tuyere for a blast furnace comprises a water-cooled tuyere and a burner, fitted inside the water-cooled tuyere. The burner is composed of an inner pipe, an intermediate pipe and an outer pipe which form almost a common center axis of a concentric circle. The inside of the inner pipe is used for a pulverized coal path, an oxygen feed path being in between the inner pipe and the intermediate pipe and a flame temperature control gas feed path in between the intermediate pipe and the outer pipe. The burner is equipped with a water-cooled jacket outside the top end of the burner.
Description
The present invention relates to a kind of structure of blast-furnace tuyere of the structure that is used for ironmaking tuyere of blast furnace, particularly coal injection.
Recently, for the productivity of improving blast furnace or in order to utilize top gas to make the raw material of synthetic chemical industry, proposed with the whole bag of tricks of oxygen as the main component of blowing gas.A kind of method of jet oxygen enrichment and the stock gas through making is again disclosed for No. 32323/77 as Japanese Patent.(publication number: also disclose a kind of method 159104/85), it is blown into oxygen by the air port and as the H of tuyere front end flame temperature control agent at another Japanese patent application
2O or CO
2, simultaneously, be blown into no N by the blast furnace middle part again
2Gas.In the specification sheets of this patent application, disclose and produced the molten iron per ton 100Kg coal dust of can jetting, but the method for coal injection has not been described.Moreover in the prior art of blast furnace, coal dust will be blown into by tuyere notch with suitable carrier gas.With the method for prior art, wanting in large quantities, combusting coal fines is difficult like this.
The purpose of this invention is to provide a kind of air port that allows a large amount of coal injections and energy perfect combustion.
According to the present invention, blast-furnace tuyere comprises a water-cooled tuyere and is contained in the interior burner of water-cooled tuyere.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a sectional view, and that its is represented is an embodiment of blast-furnace tuyere of the present invention.
Referring now to accompanying drawing 1, introduce the embodiment of blast-furnace tuyere of the present invention.At water-cooled tuyere 1 inner face burner 2 is housed.Pipe 3 in burner 2 comprises, middle pipe 4 and outer tube 5, this three pipe is coaxial basically; Also comprise the water jacket 9 that places burner 2 ends.Coal dust infeeds passage 6 within interior pipe 3, and oxygen infeeds passage 7 between interior pipe 3 and intervalve 4, and tuyere front end flame temperature pilot-gas infeeds passage 8 between middle pipe 4 and outer tube 5.By oxygen channel 7, be blown into the oxygen volume and account for 40% or higher gas.Infeed passage 8 by tuyere front end flame temperature pilot-gas, be blown into by circulation blast furnace gas, CO
2With a kind of gas optional in the water vapor.Water jacket 9 is close to the internal surface with the water-cooled tuyere of the inboard strict seal of blast furnace.In the end of burner 2, ejiction opening 10 will be arranged to make coal dust, oxygen and the tuyere front end flame temperature pilot-gas of ejection to enter blast furnace with well-mixed state.Since thorough mixing, coal dust perfect combustion.Water-cooled tuyere 1 and water jacket 9 infeed pipe 11 water coolings that provide by cold water.
Secondly, explanation now is water-cooled tuyere 1 and the water jacket 9 parallel benefits that are installed in burner 2 tops.Out of order possibility is less in the operation that oxygen and tuyere front end flame temperature pilot-gas is blown into the air port, and just is easy to go wrong in the operation that oxygen, tuyere front end flame temperature pilot-gas and coal dust is blown into together the air port.In this respect, parallel tuyere structure can be limited in minimum degree to the possibility that has problems or can get for out of order burner with a burner with the shortest temporally precise when problem takes place.
At last, the use working method with parallel organization air port of the present invention is described.Iron ore and coke are by the furnace roof blast furnace of packing into.The oxygen volume account for 40% or higher gas, tuyere front end flame temperature pilot-gas and coal dust be blown into blast furnace by the air port that is installed in bottom house.Preheating gas enters the furnace charge that blast furnace and preheating add blast furnace by the blow-on that is installed on the shaft with blast inlet.By aforesaid method, because oxygen adds by the air port, so coke and the perfect combustion of coal dust energy, the reducing gas that produces therefrom fusing and reducing iron ore become molten iron and slag.
As previously mentioned, when by convention the air port with structure of the present invention being used for the coal injection operation, the air port not only has the effect that makes coal dust perfect combustion, and can also help changing quickly and accurately the oxygen burner that breaks down.
Claims (1)
1, a kind of blast-furnace tuyere comprises a water-cooled tuyere (1) and is installed in the burner (2) of water-cooled tuyere (1) inner face, it is characterized in that described burner (2) comprising:
A) an interior pipe (3), pipe (4) and an outer tube (5) in one, this three pipe is coaxial basically, in the internal space of pipe (3) constitute one be used to infeed coal dust in infeed passage (6), in space between pipe (3) and the middle pipe (4) constitute a centre that is used to infeed oxygen and infeed passage (7), the space formation one between middle pipe (4) and the outer tube (5) is used to infeed the outer passage (8) that infeeds of tuyere (1) front end flame temperature pilot-gas.
B) water jacket (9) outside burner (2) end,
C) make the ejiction opening (10) that enters blast furnace by coal dust, oxygen and tuyere (1) the front end flame temperature pilot-gas of burner (2) end ejection with the thorough mixing state.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP185787A JPS63171810A (en) | 1987-01-09 | 1987-01-09 | Firing method for oxygen blast furnace |
| JP1857/87 | 1987-01-09 | ||
| JP1856/87 | 1987-01-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88100068A CN88100068A (en) | 1988-08-24 |
| CN1007431B true CN1007431B (en) | 1990-04-04 |
Family
ID=11513211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88100068 Expired CN1007431B (en) | 1987-01-09 | 1988-01-09 | Tuyere of blast furnace |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS63171810A (en) |
| CN (1) | CN1007431B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69322002T2 (en) * | 1992-07-01 | 1999-04-01 | Paul Wurth S.A., Luxemburg/Luxembourg | Device for blowing coal dust into a blast furnace |
| KR970009084B1 (en) * | 1994-12-29 | 1997-06-05 | 김만제 | Apparatus for melting fine coals and method of melting the same using the apparatus |
| KR100803990B1 (en) * | 2006-10-18 | 2008-02-15 | 주식회사 포스코 | Tuvere tuyere of melter-gasifier |
| CN106032907B (en) * | 2015-03-12 | 2018-06-29 | 宝山钢铁股份有限公司 | Blast furnace gas burner igniter |
| CN116516088A (en) * | 2023-04-11 | 2023-08-01 | 新疆八一钢铁股份有限公司 | Tuyere device of hydrogen-rich carbon circulating oxygen blast furnace |
-
1987
- 1987-01-09 JP JP185787A patent/JPS63171810A/en active Pending
-
1988
- 1988-01-09 CN CN 88100068 patent/CN1007431B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN88100068A (en) | 1988-08-24 |
| JPS63171810A (en) | 1988-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR910000485B1 (en) | Tuyere of blast furnace | |
| US4849015A (en) | Method for two-stage melt reduction of iron ore | |
| KR930009968B1 (en) | Iron making by means of a smelting shaft furnace | |
| US3970290A (en) | Arrangement for feeding | |
| US2750277A (en) | Process and apparatus for reducing and smelting iron | |
| US2500553A (en) | Apparatus for smelting low-grade ores | |
| US5149363A (en) | Process for smelting or melting ferrous or non-ferrous metal from self-reducing agglomerates or metal | |
| EP0056644A2 (en) | Supersonic injection of oxygen in cupolas | |
| US5632953A (en) | Process and device for melting iron metallurgical materials in a coke-fired cupola | |
| US4072502A (en) | Method apparatus for increasing blast gas temperature in a shaft furnace | |
| JPS62263906A (en) | Method for blowing pulverized coal from blast furnace tuyere | |
| CN1007431B (en) | Tuyere of blast furnace | |
| CN102242230A (en) | Quicklime powder blowing method | |
| US2650161A (en) | Production of iron in a blast furnace | |
| US6692688B2 (en) | Modular furnace | |
| US3248211A (en) | Refining of iron | |
| US4422624A (en) | Concentrate burner | |
| US3313618A (en) | Method and apparatus for making steel continuously | |
| AU2002255780A1 (en) | Modular shaft for reduction smelting | |
| US1944874A (en) | Reduction of ores | |
| US4179280A (en) | Direct-reduction process carried out in a rotary kiln | |
| US6146440A (en) | Process for the direct production of cast iron from iron bearing ore, and an apparatus suitable to carry out said process | |
| US3537841A (en) | Method of reducing iron ores to pig iron | |
| SU1054415A1 (en) | Method for conducting blast furnace smelting | |
| US3659832A (en) | Cupolas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |