CN102732669A - Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing - Google Patents
Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing Download PDFInfo
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- CN102732669A CN102732669A CN2012102068809A CN201210206880A CN102732669A CN 102732669 A CN102732669 A CN 102732669A CN 2012102068809 A CN2012102068809 A CN 2012102068809A CN 201210206880 A CN201210206880 A CN 201210206880A CN 102732669 A CN102732669 A CN 102732669A
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- converter
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- slag
- dephosphorized slag
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Abstract
The invention provides an auxiliary device for the removal of dephosphorization residues in a converter, and a method for the auxiliary removal of the dephosphorization residues through air blowing. The auxiliary device for the removal of the dephosphorization residues in the converter of the invention comprises an air supply opening at the residue discharge side of the converter, and the horizontal position of the air supply opening is lower than the horizontal position of the steel outlet of the converter. The auxiliary device for the removal of the dephosphorization residues in the converter of the invention has the advantages of rapid and effective removal of the high phosphorous residues, dephosphorization efficiency improvement, end point [P] content reduction, molten iron temperature improvement, and production cost reduction.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, relate to supplementary unit and a kind of auxiliary method of removing dephosphorized slag of blowing that a kind of converter removes dephosphorized slag.
Background technology
In order to adapt to the expansion of global energy needs, in recent years, the produced quantity of resource is increasing under the sea such as oil, Sweet natural gas, and environment is more and more abominable under the corresponding with it sea, and corrodibility is strengthened.This equipment that just requires operation under the sea also will have certain erosion resistance except having HS.Implement is with the request for utilization of steel down in order to satisfy the sea, and the high-cleanness, highization of low phosphoretic steel even ultra-low phosphoretic steel, ultralow-sulfur steel is very important, and the process for making process is the key point of the cleanliness factor of control steel.
Dephosphorization of molten iron is handled according to used container different, and dephosphorization of molten iron can be divided into two types: a kind of is in hot metal ladle or torpedo car, to carry out liquid iron pretreatment dephosphorizing, and another kind is in converter, to carry out dephosphorization.In converter steelmaking was produced, the problem of dephosphorization received showing great attention to of each steelworks always in the converter stove.The method that generally adopts at present has: single slag process, double slag process, duplex etc.When phosphorus content in the molten iron ([P]) surpasses 0.12%, adopt single slag process to carry out dephosphorization and just compare difficulty; Under the molten iron phosphorus content surpasses 0.12% situation,, can increase the difficulty of converter dephosphorization when [Si] in the molten iron reached 0.5% and when above.Therefore, through the factor that influences converter dephosphorization is analyzed and researched, adopt the double slag process operation to obtain good dephosphorization effect.So-called double slag process (that is, the secondary slag practice) is meant: converter is fallen stove early stage smelting when blowing is to 8～12min, emit a part of high phosphorus slag, continues blowing slag-making again then, and further dephosphorization falls stove then, catch carbon, and point blows, tapping.Therefore, how to remove the key point that high phosphorus slag is a double slag process technology quickly and efficiently, can directly have influence on final dephosphorization effect.
Summary of the invention
The present invention is directed to the deficiency of prior art, provide a kind of converter to remove the supplementary unit of dephosphorized slag.
The method that the present invention also provides a kind of supplementary unit that utilizes converter to remove dephosphorized slag to blow auxiliary slagging-off.
The objective of the invention is to remove quickly and efficiently high phosphorus slag, reduce the consumption of dephosphorizing agent, improve dephosphorization efficient and molten iron temperature, reduce terminal point [P] content.
To above-mentioned purpose; One side of the present invention provides a kind of converter to remove the supplementary unit of dephosphorized slag; The supplementary unit that said converter removes dephosphorized slag comprises the air feed port of the tapping side that is installed in converter, and the level attitude of said air feed port is lower than the level attitude of the tap hole of converter.
According to an aspect of the present invention, the level attitude of said air feed port is beneficial to liberated heat and is absorbed on the molten iron liquid level about 1m.
According to an aspect of the present invention, the said converter supplementary unit that removes dephosphorized slag also comprises supply oxygen or the storing device of high pressure gas and the reversing system of gas circuit that is connected with air feed port.
A kind of auxiliary method of removing dephosphorized slag of blowing is provided according to a further aspect in the invention; Said method comprises: through the air feed port of level attitude that level attitude is lower than the tap hole of converter is installed at the tapping side of converter; Make when converter is vertically made steel; Be blown into oxygen through said air feed port, emit heat thereby carry out secondary combustion through the CO reaction of emitting in the oxygen that is blown into and the molten iron.
According to a further aspect in the invention, said method also comprises: when slagging is toppled in converter, emit high pressure gas through said air feed port, make high phosphorus slag be rejected to outside the converter with the fluctuation of liquid steel level.
According to the supplementary unit of converter of the present invention except that dephosphorized slag, can remove high phosphorus slag quickly and efficiently, improve dephosphorization efficient, reduce terminal point [P] content.In addition,, can also reduce the rephosphorization amount, reduce the consumption of dephosphorizing agent according to the supplementary unit of converter of the present invention except that dephosphorized slag.In addition,, can also improve molten iron temperature, reduce production costs according to the supplementary unit of converter of the present invention except that dephosphorized slag.
Description of drawings
Fig. 1 shows the synoptic diagram of supplementary unit when converter is vertically made steel that removes dephosphorized slag according to converter of the present invention.
Fig. 2 shows the synoptic diagram of supplementary unit when converter tilts to remove high phosphorus slag that removes dephosphorized slag according to converter of the present invention.
Embodiment
In order to remove high phosphorus slag quickly and efficiently, reduce the consumption of dephosphorizing agent, improve dephosphorization efficient and molten iron temperature, reduce terminal point [P] content, the invention provides a kind of supplementary unit of converter dephosphorization slag.
According to the present invention, the supplementary unit of converter dephosphorization slag comprises the air feed port of the tapping side that is installed in converter, and the level attitude of air feed port is lower than the level attitude of the tap hole of converter.According to one embodiment of present invention, the optimum seeking site ground of air feed port is beneficial to liberated heat and is absorbed, and when high phosphorus slag was tumbled down in converter, air feed port then more was close to the bottom of converter on the molten iron liquid level about 1m.According to the present invention, the shape of air feed port is not done concrete qualification, as long as it satisfies aforementioned requirement.The reversing system that also can comprise storing device (not shown) that is arranged on outside supply oxygen that is connected with air feed port of converter or high pressure gas and the gas circuit that is arranged on the converter outside according to the supplementary unit of converter dephosphorization slag of the present invention.
Therefore, according to the present invention, air feed port is installed through tapping side in converter; When slagging is toppled in converter; Emit high pressure gas (air or oxygen all can) through air feed port, in molten steel, form huge bubble, bubble constantly rises; And finally cause the fluctuation of liquid steel level, this moment, high phosphorus slag was excluded outside the converter with the fluctuation of liquid level.When converter is vertically made steel, through blowing (or soft blow) oxygen a little less than the air feed port, with the CO reaction of emitting in the molten iron, carry out secondary combustion and emit heat, thereby can improve molten iron temperature.According to the present invention, when steel-making,, when slagging, emit high pressure gas (for example, being air or oxygen) through air feed port through air feed port soft blow oxygen, therefore, can switch steel-making operation and slagging operation through reversing valve.According to one embodiment of present invention, can when slagging, emit high-pressure air, to reduce cost through air feed port.
In order to explain the present invention better, will combine accompanying drawing that the present invention is further specified below, but the invention is not restricted to this.
Fig. 1 shows the synoptic diagram of supplementary unit when converter is vertically made steel that removes dephosphorized slag according to converter of the present invention.Fig. 2 shows the synoptic diagram of supplementary unit when converter tilts to remove high phosphorus slag that removes dephosphorized slag according to converter of the present invention.
As shown in Figure 1, the supplementary unit that removes dephosphorized slag according to converter of the present invention comprises the air feed port 1 of the tapping side that is installed in converter, and tap hole 2 will be higher than the position of air feed port.When converter is vertically made steel, through air feed port 1 soft blow oxygen, the CO reaction of emitting in feasible oxygen that is blown into and the molten iron, thus emit heat through secondary combustion, improve molten iron temperature.It will be understood by those skilled in the art that here " soft blow " is meant that oxygen lance blow head is far away apart from liquid level in the oxygen top blown converter steel making process; Oxygen Flow is less to the surging force of liquid level; It is more shallow that oxygen jet penetrates the molten bath, and contact area is bigger, so be called " soft blow ".
When slagging is toppled in converter, as shown in Figure 2, (for example emit high pressure gas through air feed port 1; Air or oxygen), in molten steel, form huge bubble, bubble constantly rises; And finally cause the fluctuation of liquid steel level, this moment, high phosphorus slag was rejected to outside the converter with the fluctuation of liquid level.Therefore,, can remove high phosphorus slag quickly and efficiently, improve dephosphorization efficient, reduce terminal point [P] content through the supplementary unit of converter of the present invention except that dephosphorized slag; In addition, can also reduce the rephosphorization amount, reduce the consumption of dephosphorizing agent.
Therefore, according to the present invention, in steelmaking process, when slagging-off or catch carbon, converter is turned over to the air feed port inclination, during tapping, turns over to the tap hole inclination, can tumble front and back.Therefore, the supplementary unit that removes dephosphorized slag according to converter of the present invention has following advantage:
(1) through air feed port high pressure gas are provided, in molten steel, form bubble, this bubble can promote floating foreign; Main is the fluctuation that causes liquid steel level; Thereby can remove high phosphorus slag quickly and efficiently, improve dephosphorization efficient, reduce terminal point [P] content.
(2) because advantage above-mentioned so can remove high phosphorus slag more, prevents the generation of rephosphorization, so lowered the use of dephosphorizing agent for the second time effectively.This method relatively is similar to and washes clothes, and when washing first pass, outwells laundry water, when washing for the second time, only needs to add a small amount of washing powder and gets final product.Therefore, the supplementary unit that removes dephosphorized slag according to converter of the present invention can reduce the rephosphorization amount, reduces the consumption of dephosphorizing agent.
(3) can improve molten iron temperature, thereby reduce production cost.
Though specifically illustrate and described the present invention with reference to exemplary embodiment of the present invention; But it should be understood by one skilled in the art that; Under situation about not breaking away from, can make the change on various forms and the details at this claim and the spirit and scope of the present invention that equivalent limited thereof.
Claims (7)
1. a converter removes the supplementary unit of dephosphorized slag, it is characterized in that: the supplementary unit that said converter removes dephosphorized slag comprises the air feed port of the tapping side that is installed in converter, and the level attitude of said air feed port is lower than the level attitude of the tap hole of converter.
2. converter according to claim 1 removes the supplementary unit of dephosphorized slag, and the level attitude that it is characterized in that said air feed port is on the molten iron liquid level about 1m.
3. converter according to claim 1 removes the supplementary unit of dephosphorized slag, it is characterized in that said converter also comprises supply oxygen or the storing device of high pressure gas and the reversing system of gas circuit that is connected with air feed port except that the supplementary unit of dephosphorized slag.
4. the method for removing dephosphorized slag is assisted in an air blowing; It is characterized in that said method comprises: through the air feed port of level attitude that level attitude is lower than the tap hole of converter is installed at the tapping side of converter; Make when converter is vertically made steel; Be blown into oxygen through said air feed port, emit heat thereby carry out secondary combustion through the CO reaction of emitting in the oxygen that is blown into and the molten iron.
5. the auxiliary method of removing dephosphorized slag of air blowing according to claim 4 is characterized in that said method also comprises: when slagging is toppled in converter, emit high pressure gas through said air feed port, make high phosphorus slag be rejected to outside the converter with the fluctuation of liquid steel level.
6. the auxiliary method of removing dephosphorized slag of air blowing according to claim 4, the level attitude that it is characterized in that said air feed port is on the molten iron liquid level about 1m.
7. the auxiliary method of removing dephosphorized slag of air blowing according to claim 4 is characterized in that said converter also comprises supply oxygen or the storing device of high pressure gas and the reversing system of gas circuit that is connected with air feed port except that the supplementary unit of dephosphorized slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210206880.9A CN102732669B (en) | 2012-06-21 | 2012-06-21 | Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210206880.9A CN102732669B (en) | 2012-06-21 | 2012-06-21 | Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing |
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| Publication Number | Publication Date |
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| CN102732669A true CN102732669A (en) | 2012-10-17 |
| CN102732669B CN102732669B (en) | 2014-11-12 |
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| CN201210206880.9A Expired - Fee Related CN102732669B (en) | 2012-06-21 | 2012-06-21 | Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5959820A (en) * | 1982-09-30 | 1984-04-05 | Sumitomo Metal Ind Ltd | Metal refining furnace and its operating method |
| JPH04350109A (en) * | 1991-05-28 | 1992-12-04 | Nippon Steel Corp | Method for removing slag |
| CN2229930Y (en) * | 1995-06-30 | 1996-06-26 | 唐山钢铁股份有限公司 | Oxygen side blown converter |
| JPH08291311A (en) * | 1995-04-19 | 1996-11-05 | Nippon Steel Corp | Steel scrap melting method excellent in heat conductive efficiency |
| JPH08295915A (en) * | 1995-04-27 | 1996-11-12 | Nippon Steel Corp | Method for melting steel scrap utilizing granular iron |
| JPH09176719A (en) * | 1995-12-26 | 1997-07-08 | Sumitomo Metal Ind Ltd | Converter and blowing operation |
| CN101338349A (en) * | 2007-07-03 | 2009-01-07 | 东北大学 | Converter steelmaking process by top, bottom and side blowing |
| CN202688358U (en) * | 2012-06-21 | 2013-01-23 | 莱芜钢铁集团有限公司 | Auxiliary device of converter for removing phosphorus slag |
-
2012
- 2012-06-21 CN CN201210206880.9A patent/CN102732669B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5959820A (en) * | 1982-09-30 | 1984-04-05 | Sumitomo Metal Ind Ltd | Metal refining furnace and its operating method |
| JPH04350109A (en) * | 1991-05-28 | 1992-12-04 | Nippon Steel Corp | Method for removing slag |
| JPH08291311A (en) * | 1995-04-19 | 1996-11-05 | Nippon Steel Corp | Steel scrap melting method excellent in heat conductive efficiency |
| JPH08295915A (en) * | 1995-04-27 | 1996-11-12 | Nippon Steel Corp | Method for melting steel scrap utilizing granular iron |
| CN2229930Y (en) * | 1995-06-30 | 1996-06-26 | 唐山钢铁股份有限公司 | Oxygen side blown converter |
| JPH09176719A (en) * | 1995-12-26 | 1997-07-08 | Sumitomo Metal Ind Ltd | Converter and blowing operation |
| CN101338349A (en) * | 2007-07-03 | 2009-01-07 | 东北大学 | Converter steelmaking process by top, bottom and side blowing |
| CN202688358U (en) * | 2012-06-21 | 2013-01-23 | 莱芜钢铁集团有限公司 | Auxiliary device of converter for removing phosphorus slag |
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| CN102732669B (en) | 2014-11-12 |
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Granted publication date: 20141112 Termination date: 20180621 |
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