CN1664118A - Converter steelmaking process by blowing CO2 gas - Google Patents
Converter steelmaking process by blowing CO2 gas Download PDFInfo
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- CN1664118A CN1664118A CN 200510011479 CN200510011479A CN1664118A CN 1664118 A CN1664118 A CN 1664118A CN 200510011479 CN200510011479 CN 200510011479 CN 200510011479 A CN200510011479 A CN 200510011479A CN 1664118 A CN1664118 A CN 1664118A
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- gas
- oxygen
- carbon dioxide
- winding
- steelmaking process
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Abstract
A converting process that jets carbon dioxide, belonging to ferrous metallurgy field. The process takes oxygen and carbon dioxide or the mixed gas with oxygen and carbon dioxide as gas source, the injection quantity of gas is 1000-120000Nm3/h, the pressure is 0.4-1.6MPa.The process can make use of carbon dioxide recovered and treated from waste gas that generated by various industrial furnace, and also can exploit natural carbon dioxide as gas source. It suits for steel that the carbon content is 0.01-1.30% in the smelting steel. By using carbon dioxide instead of oxygen, it decreases the burning loss of iron and other metal element during the smelting process, which deducing the production cost and the consumption of oxygen, and therefore plays a positive part in alleviating the green house effect and has a dramatic social benefit.
Description
Technical field
The invention belongs to the ferrous metallurgy field, particularly a kind of converter steelmaking blowing technology.
Background technology
Traditional converter steelmaking process generally is to adopt oxygen as the smelting means, and the interior various elements of the ferric oxide liquid that is used to make steel reach and adjust the purpose of smelting composition, removing objectionable impurities, smelting the qualified molten steel of temperature.But because dioxygen oxidation intensity height, the iron loss that causes during oxygen blast is bigger, and system oxygen demand consumes energy, strengthens production cost.
Summary of the invention
The object of the invention is to find out a kind of gas that can replace the oxygen smelting molten steel, reduces the scaling loss of smelting process iron and other metallic elements, reduces production costs, and does not influence the smelting molten steel quality simultaneously.
CO
2Be weak oxide gas, the tramp element at high temperature the same oxidizable metal molten bath with oxygen, and also as the byproduct of various industrial furnaces, its cost recovery and energy consumption are lower than system oxygen cost; Nature also has a large amount of natural CO
2Resource exists, and wide material sources, with low cost are the desirable sources of the gas of replace oxygen steel-making.
A kind of winding-up CO
2Converter steelmaking process, it is characterized in that steelmaking process is with CO
2Or CO
2-O
2Mixed gas is a source of the gas, and amount of spraying gas is 1000-120000Nm
3/ h, pressure are 0.4-1.6Mpa; CO
2-O
2Mixed gas is a source of the gas, CO
2Concentration is 10～100%, O
2Concentration is 0～90%.
CO
2-O
2Mixed gas input mode: CO
2Mix through former aerobic rifle input steel melting furnace by mixing device with oxygen.CO
2Adopt supersonic spray gun to cooperate with former aerobic rifle separately, CO jets in steel melting furnace respectively
2And oxygen; O
2The winding-up flow be CO
21～10 times of winding-up flow.
During winding-up, adopt the top blast mode usually, spray gun can move up and down.Also can adopt furnace wall side-blown and furnace bottom injection method under the particular case.
The CO that this technology can utilize the waste gas with various industrial furnaces to obtain after recycling
2, also can exploit natural natural CO
2Resource is a source of the gas.Carbon content is the 0.01-1.30% steel grade in the adaptation smelting steel.CO
2Replace the gas of oxygen, reduced the scaling loss of smelting process iron and other metallic elements, reduced production cost, reduced the consumption of oxygen, played positive effect, have remarkable social benefit for alleviating atmospheric Greenhouse effect as smelting molten steel.
Embodiment
1. 80 tons of converter smelting process adopt CO
2-O
2Mixed injection utilizes the top blast mode, with a spray gun.
Change slag stage: CO
2-O
2CO in the mixed gas
2Concentration is 30%, O
2Concentration is 70%.Behind dropping to of the spray gun slag position, according to the situation of in-furnace slag, decision CO
2-O
2The winding-up time.Mixed gas flow adopts 16000-23000Nm
3/ h, pressure are 0.4-1.6Mpa.
The decarburization temperature rise period: after change slag task was finished, spray gun dropped to decarburization position, CO
2-O
2CO in the mixed gas
2Concentration is 10%, O
2Concentration is 90%, and mixed gas flow is 16000-23000Nm
3/ h according to the carbon content decision decarburization time in molten bath in the stove, reaches the temperature and the steel grades of tapping.
2. 300 tons of converter smelting process: CO
2Adopt supersonic spray gun to cooperate with former aerobic rifle separately, CO jets in steel melting furnace respectively
2And oxygen.The design variable of spray gun is: adopt water-cooling pattern, jet to adopt supersonic jet, and Mach 2 ship 1.6-2.5, spray gun spray orifice number is 1-8, Inlet and outlet water flow 10-600t/h.Flow adopts 16000-80000Nm
3/ h, pressure are 0.4-1.6Mpa.
The winding-up flow of changing slag stage oxygen is CO
2Winding-up 7 times of flow, the winding-up flow of decarburization temperature rise period oxygen is CO
2Winding-up 9 times of flow.
Claims (4)
- One kind the winding-up CO 2Converter steelmaking process, it is characterized in that steelmaking process is with O 2And CO 2Or CO 2-O 2Mixed gas is a source of the gas, and amount of spraying gas is 1000-120000Nm 3/ h, pressure are 0.4-1.6Mpa.
- 2. winding-up CO as claimed in claim 1 2Converter steelmaking process, it is characterized in that adopting CO 2-O 2Mixed gas is a source of the gas, CO 2Concentration is 10～100%, O 2Concentration is 0～90%.
- 3. winding-up CO as claimed in claim 1 2Converter steelmaking process, it is characterized in that CO 2Adopt supersonic spray gun to cooperate with former aerobic rifle separately, CO jets in steel melting furnace respectively 2And oxygen, O 2The winding-up flow be CO 21～10 times of winding-up flow.
- 4. as claim 1 or 2 or 3 described winding-up CO 2Converter steelmaking process, it is characterized in that CO 2Can spray into from converter top, sidewall, bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011479 CN1664118A (en) | 2005-03-25 | 2005-03-25 | Converter steelmaking process by blowing CO2 gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011479 CN1664118A (en) | 2005-03-25 | 2005-03-25 | Converter steelmaking process by blowing CO2 gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1664118A true CN1664118A (en) | 2005-09-07 |
Family
ID=35035428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510011479 Pending CN1664118A (en) | 2005-03-25 | 2005-03-25 | Converter steelmaking process by blowing CO2 gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1664118A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818227A (en) * | 2010-05-05 | 2010-09-01 | 北京科技大学 | Method for recycling CO2 separated from converter steel-making gas for top blowing and bottom blowing |
| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
| CN102251070A (en) * | 2011-07-18 | 2011-11-23 | 北京科技大学 | Method for implementing efficient extraction of vanadium from converter through CO2 |
| CN102251068A (en) * | 2011-07-08 | 2011-11-23 | 攀钢集团有限公司 | Vanadium-extracting cooling agent and preparation method thereof |
| CN102268507A (en) * | 2011-08-23 | 2011-12-07 | 北京科技大学 | Method for smelting steel by using low-carbon or carbon-free molten iron |
| CN102719619A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Desiliconizing method for molten iron |
| CN104928439A (en) * | 2015-07-08 | 2015-09-23 | 北京科技大学 | Method for improving dephosphorization efficiency in duplex converter by using CO2 |
| CN108004373A (en) * | 2017-11-17 | 2018-05-08 | 江苏省冶金设计院有限公司 | It is a kind of to improve the molten method for dividing stove reaction rate |
| WO2018201552A1 (en) * | 2017-05-02 | 2018-11-08 | 北京科技大学 | Method and apparatus for high-efficiency dephosphorization by mass-energy conversion cycling and multi-component blowing for dephosphorization converter gas |
| CN108796163A (en) * | 2018-06-13 | 2018-11-13 | 北京科技大学 | It is a kind of to utilize CO2The method for controlling converter oxygen gun jet impulse area high temp fire point |
| CN114134281A (en) * | 2021-11-30 | 2022-03-04 | 首钢集团有限公司 | Oxygen lance nozzle and blowing smelting method thereof |
-
2005
- 2005-03-25 CN CN 200510011479 patent/CN1664118A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818227A (en) * | 2010-05-05 | 2010-09-01 | 北京科技大学 | Method for recycling CO2 separated from converter steel-making gas for top blowing and bottom blowing |
| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
| CN102719619A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Desiliconizing method for molten iron |
| CN102251068A (en) * | 2011-07-08 | 2011-11-23 | 攀钢集团有限公司 | Vanadium-extracting cooling agent and preparation method thereof |
| CN102251070B (en) * | 2011-07-18 | 2012-11-07 | 北京科技大学 | Method for implementing efficient extraction of vanadium from converter through CO2 |
| CN102251070A (en) * | 2011-07-18 | 2011-11-23 | 北京科技大学 | Method for implementing efficient extraction of vanadium from converter through CO2 |
| CN102268507A (en) * | 2011-08-23 | 2011-12-07 | 北京科技大学 | Method for smelting steel by using low-carbon or carbon-free molten iron |
| CN102268507B (en) * | 2011-08-23 | 2012-11-07 | 北京科技大学 | Method for smelting steel by using low-carbon or carbon-free molten iron |
| CN104928439A (en) * | 2015-07-08 | 2015-09-23 | 北京科技大学 | Method for improving dephosphorization efficiency in duplex converter by using CO2 |
| WO2018201552A1 (en) * | 2017-05-02 | 2018-11-08 | 北京科技大学 | Method and apparatus for high-efficiency dephosphorization by mass-energy conversion cycling and multi-component blowing for dephosphorization converter gas |
| CN108004373A (en) * | 2017-11-17 | 2018-05-08 | 江苏省冶金设计院有限公司 | It is a kind of to improve the molten method for dividing stove reaction rate |
| CN108796163A (en) * | 2018-06-13 | 2018-11-13 | 北京科技大学 | It is a kind of to utilize CO2The method for controlling converter oxygen gun jet impulse area high temp fire point |
| CN114134281A (en) * | 2021-11-30 | 2022-03-04 | 首钢集团有限公司 | Oxygen lance nozzle and blowing smelting method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |