CN202688358U - Auxiliary device of converter for removing phosphorus slag - Google Patents
Auxiliary device of converter for removing phosphorus slag Download PDFInfo
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- CN202688358U CN202688358U CN 201220294356 CN201220294356U CN202688358U CN 202688358 U CN202688358 U CN 202688358U CN 201220294356 CN201220294356 CN 201220294356 CN 201220294356 U CN201220294356 U CN 201220294356U CN 202688358 U CN202688358 U CN 202688358U
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Abstract
The utility model provides an auxiliary device of a converter for removing phosphorus slag. The auxiliary device of the converter for removing the phosphorus slag provided by the utility model comprises an air supply port arranged at a slag discharge side of the converter, wherein the horizontal position of the air supply port is lower than that of a steel discharge port of the converter. According to the auxiliary device of the converter for removing the phosphorus slag provided by the utility model, the high phosphorus slag can be quickly and effectively removed, the dephosphorization efficiency can be improved, the terminal point (P) content can be reduced, the temperature of molten iron can be further improved, and the production cost can be reduced.
Description
Technical field
The utility model belongs to technical field of ferrous metallurgy, relates to a kind of converter except the supplementary unit of dephosphorized slag.
Background technology
In order to adapt to the expansion of global energy needs, in recent years, the produced quantity of the lower resource in the sea such as oil, Sweet natural gas is increasing, and with it under the corresponding sea environment more and more abominable, corrodibility is strengthened.This equipment that just requires the lower operation in sea also will have certain erosion resistance except having high strength.Use the service requirements of steel in order to satisfy the lower implement in sea, the high-cleanness, high of Low-phosphorus 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 processed according to used container different, and dephosphorization of molten iron can be divided into two classes: a kind of is to carry out liquid iron pretreatment dephosphorizing in hot metal ladle or torpedo car, and another kind is to carry out dephosphorization in converter.In converter steelmaking was produced, the problem of dephosphorization was subject to showing great attention to of each steelworks always in the Converter.The method that generally adopts at present has: single slag process, double slag process, duplex practice etc.When phosphorus content in the molten iron ([P]) surpassed 0.12%, it is just relatively more difficult that the employing single slag process carries out dephosphorization; Under the molten iron phosphorus content surpasses 0.12% situation, when [Si] in the molten iron reached 0.5% and when above, can increase the difficulty of converter dephosphorization.Therefore, by the factor that affects 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) refers to: converter is fallen stove during to 8～12min in the initial smelting period blowing, emits a part of high phosphorus slag, then continues again blowing slag-making, and then further dephosphorization falls stove, catch carbon, and point blows, tapping.Therefore, how to remove quickly and efficiently the key point that high phosphorus slag is double slag process technique, can directly have influence on final dephosphorization effect.
The utility model content
The utility model provides the supplementary unit of a kind of converter except dephosphorized slag for the deficiencies in the prior art.
The purpose of this utility model is to remove quickly and efficiently high phosphorus slag, reduces the consumption of dephosphorizing agent, improves dephosphorization efficient and molten iron temperature, reduces terminal point [P] content.
For above-mentioned purpose, one side of the present utility model provides the supplementary unit of a kind of converter except dephosphorized slag, described converter comprises the air feed port of the tapping side that is installed in converter except the supplementary unit of dephosphorized slag, and the level attitude of described air feed port is lower than the level attitude of the tap hole of converter.
According to one side of the present utility model, the level attitude of described air feed port can on the molten iron level about 1m, be beneficial to liberated heat and be absorbed.
According to one side of the present utility model, described converter can also comprise 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 the supplementary unit of dephosphorized slag.
According to the supplementary unit of converter of the present utility model except dephosphorized slag, can remove quickly and efficiently high phosphorus slag, improve dephosphorization efficient, reduce terminal point [P] content.In addition, according to the supplementary unit of converter of the present utility model except dephosphorized slag, can also reduce the rephosphorization amount, reduce the consumption of dephosphorizing agent.In addition, according to the supplementary unit of converter of the present utility model except dephosphorized slag, can also improve molten iron temperature, reduce production costs.
Description of drawings
Fig. 1 shows according to supplementary unit the synoptic diagram when converter vertically make steel of converter of the present utility model except dephosphorized slag.
Fig. 2 shows according to supplementary unit the synoptic diagram when converter tilt except high phosphorus slag of converter of the present utility model except dephosphorized slag.
Embodiment
In order 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, the utility model provides a kind of supplementary unit of converter dephosphorization slag.
According to the utility model, 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 an embodiment of the present utility model, the location optimization ground of air feed port is beneficial to liberated heat and is absorbed, and when converter tipping fell high phosphorus slag, air feed port then more was close to the bottom of converter on the molten iron level about 1m.According to the utility model, the shape of air feed port is not done concrete restriction, as long as it satisfies aforementioned requirement.Also can comprise the storing device (not shown) of the supply oxygen that is connected with air feed port that is arranged on the converter outside or high pressure gas and be arranged on the reversing system of the gas circuit of converter outside according to the supplementary unit of converter dephosphorization slag of the present utility model.
Therefore, according to the utility model, by the tapping side in converter air feed port is installed, when slagging is toppled in converter, emit high pressure gas (air or oxygen all can) by air feed port, form huge bubble in molten steel, 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, by 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 utility model, when steel-making, by air feed port soft blow oxygen, when slagging, emit high pressure gas (for example, being air or oxygen) by air feed port, therefore, can switch steel-making operation and slagging operation by reversing valve.According to an embodiment of the present utility model, can when slagging, emit high-pressure air by air feed port, to reduce cost.
The utility model the utility model is described further below in conjunction with accompanying drawing in order to explain better, but the utility model is not limited to this.
Fig. 1 shows according to supplementary unit the synoptic diagram when converter vertically make steel of converter of the present utility model except dephosphorized slag.Fig. 2 shows according to supplementary unit the synoptic diagram when converter tilt except high phosphorus slag of converter of the present utility model except dephosphorized slag.
As shown in Figure 1, comprise the air feed port 1 of the tapping side that is installed in converter according to converter of the present utility model except the supplementary unit of dephosphorized slag, tap hole 2 will be higher than the position of air feed port.When converter is vertically made steel, by air feed port 1 soft blow oxygen, so that the CO that emits in the oxygen that is blown into and molten iron reaction, thereby emit heat by secondary combustion, improve molten iron temperature.It will be understood by those skilled in the art that here " soft blow " refers to 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 larger, so be called " soft blow ".
When slagging is toppled in converter, as shown in Figure 2, (for example emit high pressure gas by air feed port 1, air or oxygen), form huge bubble in molten steel, 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, by the supplementary unit of converter of the present utility model except dephosphorized slag, can remove quickly and efficiently high phosphorus slag, improve dephosphorization efficient, reduce terminal point [P] content; In addition, can also reduce the rephosphorization amount, reduce the consumption of dephosphorizing agent.
Therefore, according to the utility model, in steelmaking process, when slagging-off or catch carbon, converter is tumbled to the air feed port side, during tapping, tumbles to the tap hole side, can tumble front and back.Therefore, have following advantage according to converter of the present utility model except the supplementary unit of dephosphorized slag:
(1) provide high pressure gas by air feed port, form bubble in molten steel, this bubble can promote the come-up of inclusion, main is the fluctuation that causes liquid steel level, thereby can remove quickly and efficiently high phosphorus slag, improve dephosphorization efficient, reduce terminal point [P] content.
(2) because advantage above-mentioned so can remove more high phosphorus slag, prevents the generation of rephosphorization, so effectively lowered for the second time use of dephosphorizing agent.The method comparing class is similar to washes clothes, and when washing first pass, laundry water is outwelled, and 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 utility model can reduce the rephosphorization amount, reduces the consumption of dephosphorizing agent.
(3) can improve molten iron temperature, thereby reduce production cost.
Although specifically illustrate and described the utility model with reference to exemplary embodiment of the present utility model, but it should be understood by one skilled in the art that, in the situation that does not break away from the spirit and scope of the present utility model that limited by claim and equivalent thereof, can make change on various forms and the details at this.
Claims (3)
1. a converter is characterized in that except the supplementary unit of dephosphorized slag: described converter comprises the air feed port of the tapping side that is installed in converter except the supplementary unit of dephosphorized slag, and the level attitude of described air feed port is lower than the level attitude of the tap hole of converter.
2. converter according to claim 1 is except the supplementary unit of dephosphorized slag, and the level attitude that it is characterized in that described air feed port is on the molten iron level about 1m.
According to claim 1 or converter claimed in claim 2 except the supplementary unit of dephosphorized slag, it is characterized in that described 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 the supplementary unit of dephosphorized slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220294356 CN202688358U (en) | 2012-06-21 | 2012-06-21 | Auxiliary device of converter for removing phosphorus slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220294356 CN202688358U (en) | 2012-06-21 | 2012-06-21 | Auxiliary device of converter for removing phosphorus slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202688358U true CN202688358U (en) | 2013-01-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220294356 Expired - Fee Related CN202688358U (en) | 2012-06-21 | 2012-06-21 | Auxiliary device of converter for removing phosphorus slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202688358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732669A (en) * | 2012-06-21 | 2012-10-17 | 莱芜钢铁集团有限公司 | Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing |
-
2012
- 2012-06-21 CN CN 201220294356 patent/CN202688358U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732669A (en) * | 2012-06-21 | 2012-10-17 | 莱芜钢铁集团有限公司 | Auxiliary device for removal of dephosphorization residues in converter, and method for auxiliary removal of dephosphorization residues through air blowing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20150621 |
|
| EXPY | Termination of patent right or utility model |