CN110408739A - A kind of bottom-blowing of converter method and device - Google Patents
A kind of bottom-blowing of converter method and device Download PDFInfo
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- CN110408739A CN110408739A CN201910662324.4A CN201910662324A CN110408739A CN 110408739 A CN110408739 A CN 110408739A CN 201910662324 A CN201910662324 A CN 201910662324A CN 110408739 A CN110408739 A CN 110408739A
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- bottom blowing
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- current pressure
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- 238000007664 blowing Methods 0.000 title claims abstract description 177
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000013507 mapping Methods 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 abstract description 11
- 230000001276 controlling effect Effects 0.000 description 26
- 230000008021 deposition Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The embodiment of the invention provides a kind of bottom-blowing of converter method and device, method includes: the default bottom blowing flow and current pressure for acquiring bottom-blowing of converter pipeline；The default bottom blowing flow for being directed to the bottom blowing pipeline is obtained, according to the default bottom blowing flow and the corresponding normal pressure of mapping relationship searching, the mapping relations are used to characterize the corresponding relationship between bottom blowing flow and normal pressure；Compare the current pressure and the normal pressure, if the current pressure and the normal pressure Y meet y≤0.1Y, it is determined that bottom blowpipe line loss is bad；In this way, can be according to the virtual condition of bottom-blowing of converter, dynamic adjusts bottom blowing process, realizes effective control to carbon oxygen product and dephosphorization effect, it is ensured that bottom blowing effect, and then improve product quality.
Description
Technical Field
The invention relates to the technical field of converter smelting, in particular to a converter bottom blowing control method and device.
Background
At present, the requirements of downstream processes on the product quality are more and more strict, and the converter is required to have low carbon-oxygen deposit control at the end point and have good dephosphorization effect.
In order to improve the bottom blowing effect, operators make a series of efforts, but at present, few methods for judging the bottom blowing condition in the converter blowing process exist, so that the bottom blowing effect of the converter cannot be improved, and further the product quality is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a converter bottom blowing method and a converter bottom blowing device, which are used for solving the technical problems that the converter bottom blowing effect cannot be improved and the product quality is influenced because the converter bottom blowing state cannot be judged in the blowing process in the prior art.
The invention provides a converter bottom blowing method, which comprises the following steps:
collecting the current pressure in a converter bottom blowing pipeline;
acquiring a preset bottom blowing flow rate aiming at the bottom blowing pipeline, and searching a corresponding standard pressure according to the preset bottom blowing flow rate and a mapping relation, wherein the mapping relation is used for representing the corresponding relation between the bottom blowing flow rate and the standard pressure;
comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure meet that Y is less than or equal to 0.1Y, determining that the bottom blowing pipeline is damaged;
sending prompt information that the bottom blowing pipeline needs to be replaced; wherein Y is the current pressure and Y is the standard pressure.
In the above scheme, after comparing the current pressure with the standard pressure, the method includes:
if the current pressure and the standard pressure meet the condition that Y is more than 0.1Y and less than or equal to 0.5Y, determining that the bottom blowing pipeline leaks air;
and sending prompt information for air leakage maintenance of the bottom blowing pipeline.
In the above scheme, after comparing the current pressure with the standard pressure, the method includes:
if the current pressure and the standard pressure meet the condition that Y is more than 0.5Y and less than or equal to 0.8Y, determining that the bottom blowing pipeline is in a normal state;
and sending prompt information for carrying out conventional slag splashing furnace protection operation on the converter.
In the above scheme, after comparing the current pressure with the standard pressure, the method includes:
if the current pressure and the standard pressure meet the condition that Y is more than 0.8Y and less than or equal to 1.0Y, controlling the bottom blowing flow to be increased by 20-30%;
and controlling the slag splashing time of the converter heat to be not more than 2min, and controlling the addition of slag splashing materials to be 0.
In the above scheme, after comparing the current pressure with the standard pressure, the method includes:
if the current pressure and the standard pressure meet the condition that Y is more than 1.0Y and less than or equal to 1.3Y, controlling the bottom blowing flow to be increased by 40-60%;
and controlling the converter to carry out slag dumping operation after tapping.
In the above scheme, after comparing the current pressure with the standard pressure, the method includes:
if the current pressure and the standard pressure meet 1.3Y and are less than Y, carrying out bottom melting operation on the converter;
when the converter is operated at the bottom of the converter, the height of the oxygen lance is controlled to be 3-4 m, and the oxygen supply intensity of the oxygen lance is controlled to be 2-3 Nm3And/t/min, and controlling the operation time of the furnace bottom to be 1-3 min.
The invention also provides a converter bottom blowing device, which comprises:
the acquisition unit is used for acquiring the current pressure in the converter bottom blowing pipeline;
the searching unit is used for acquiring a preset bottom blowing flow rate aiming at the bottom blowing pipeline and searching a corresponding standard pressure according to the preset bottom blowing flow rate and a mapping relation, wherein the mapping relation is used for representing the corresponding relation between the bottom blowing flow rate and the standard pressure;
the comparison unit is used for comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure Y meet the condition that Y is less than or equal to 0.1Y, the bottom blowing pipeline is determined to be damaged;
the sending unit is used for sending prompt information that the bottom blowing pipeline needs to be replaced; wherein Y is the current pressure and Y is the standard pressure.
In the foregoing solution, the comparing unit is further configured to:
if the current pressure and the standard pressure meet the condition that Y is more than 0.1Y and less than or equal to 0.5Y, determining that the bottom blowing pipeline leaks air;
and the sending unit is also used for sending prompt information for air leakage maintenance of the bottom blowing pipeline.
In the foregoing solution, the comparing unit is further configured to:
if the current pressure and the standard pressure meet the condition that Y is more than 0.5Y and less than or equal to 0.8Y, determining that the bottom blowing pipeline is in a normal state;
and sending prompt information for carrying out conventional slag splashing furnace protection operation on the converter.
In the foregoing solution, the comparing unit is further configured to:
if the current pressure and the standard pressure meet the condition that Y is more than 0.8Y and less than or equal to 1.0Y, controlling the bottom blowing flow to be increased by 20-30%;
and controlling the slag splashing time of the converter heat to be not more than 2min, and controlling the addition of slag splashing materials to be 0.
The embodiment of the invention provides a converter bottom blowing method and a converter bottom blowing device, wherein the method comprises the following steps: collecting a preset bottom blowing flow and a current pressure of a converter bottom blowing pipeline; acquiring a preset bottom blowing flow rate aiming at the bottom blowing pipeline, and searching a corresponding standard pressure according to the preset bottom blowing flow rate and a mapping relation, wherein the mapping relation is used for representing the corresponding relation between the bottom blowing flow rate and the standard pressure; comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure Y meet that Y is less than or equal to 0.1Y, determining that the bottom blowing pipeline is damaged; and Y is the standard pressure. Therefore, the bottom blowing process can be dynamically adjusted according to the actual state of the bottom blowing of the converter, the effective control of the carbon oxygen volume and the dephosphorization effect is realized, the bottom blowing effect is ensured, and the product quality is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a bottom blowing system of a converter according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a converter bottom blowing method according to a first embodiment of the present invention;
FIG. 3 is a schematic flow chart of a bottom blowing apparatus of a converter according to a second embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a converter bottom blowing method and a converter bottom blowing device, wherein the method comprises the following steps: collecting a preset bottom blowing flow and a current pressure of a converter bottom blowing pipeline; acquiring a preset bottom blowing flow rate aiming at the bottom blowing pipeline, and searching a corresponding standard pressure according to the preset bottom blowing flow rate and a mapping relation, wherein the mapping relation is used for representing the corresponding relation between the bottom blowing flow rate and the standard pressure; comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure meet that Y is less than or equal to 0.1Y, determining that the bottom blowing pipeline is damaged; and Y is the standard pressure.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
In order to better understand the technical solution of the present invention, a converter bottom blowing system is introduced, as shown in fig. 1, the converter bottom blowing system generally comprises: the system comprises a main pipe 1, a pressure regulating valve 2, an air bag 3, a branch pipe 4 and a flow regulating valve 5, wherein the branch pipe 4 is connected with the air bag 3. During the use process of the converter, the branch pipe 4 is directly connected with a bottom blowing element of the converter, and the bottom blowing flow of the single bottom blowing element is adjusted through the flow adjusting valve 5.
Example one
In this embodiment, a converter bottom blowing method is provided for the converter system, as shown in fig. 2, the method includes:
s210, collecting the current pressure in a converter bottom blowing pipeline;
in this embodiment, when bottom-blowing is performed on the converter, the pressure gauge is used to acquire the current pressure in the bottom-blowing pipeline of the converter in real time, and transmit the pressure to the Controller in real time, and the Controller may be a Programmable Logic Controller (PLC) Controller.
S211, acquiring a preset bottom blowing flow rate for the bottom blowing pipeline, and searching a corresponding standard pressure in a mapping table according to the preset bottom blowing flow rate;
the preset bottom blowing flow is different for different converters, the preset bottom blowing flow for the bottom blowing pipeline needs to be acquired in the step, the preset bottom blowing flow for the bottom blowing pipeline is acquired, the corresponding standard pressure is searched according to the preset bottom blowing flow and the mapping relation, and the mapping relation is used for representing the corresponding relation between the bottom blowing flow and the standard pressure. For example, for a single bottom-blowing line, the bottom-blowing flow rate is preset to be 100Nm3At the hour, the standard pressure value of the empty furnace is 0.2 MPa; the preset bottom blow flow rate was set to 200Nm3At the hour, the standard pressure value of the empty furnace is 0.4 MPa; the preset bottom blowing flow rate is 300Nm3At the hour, the standard pressure value of the empty furnace is 0.6 MPa; the preset bottom blowing flow rate is 400Nm3At the hour, the standard pressure value of the empty furnace is 0.8 MPa; the preset bottom blowing flow rate is 500Nm3The standard pressure value in the empty state of the furnace is 1.0 MPa.
In practical application, the mapping table stores the bottom blowing flow and the corresponding standard pressure value, so that after the preset bottom blowing flow is obtained, the corresponding standard pressure value can be searched in the mapping table.
S212, comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure meet that Y is less than or equal to 0.1Y, determining that the bottom blowing pipeline is damaged;
and after the current pressure and the standard pressure are obtained, comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure Y meet the condition that Y is less than or equal to 0.1Y, determining that the bottom blowing pipeline is damaged. Wherein Y is the standard pressure and Y is the current pressure.
S213, sending a prompt message that the bottom blowing pipeline needs to be replaced.
After the bottom blowing pipeline is determined to be damaged, prompt information of the bottom blowing pipeline needing to be replaced is sent through the upper computer to prompt an operator to replace the bottom blowing pipeline as soon as possible, and the bottom blowing effect is guaranteed.
Here, comparing the current pressure with the standard pressure includes:
if the current pressure and the standard pressure meet the condition that Y is more than 0.1Y and less than or equal to 0.5Y, determining that the bottom blowing pipeline leaks air; and sending prompt information for air leakage maintenance of the bottom blowing pipeline, and prompting an operator to perform air leakage maintenance on the bottom blowing pipeline.
If the current pressure and the standard pressure meet the condition that Y is more than 0.5Y and less than or equal to 0.8Y, determining that the bottom blowing pipeline is in a normal state; and sending prompt information for carrying out conventional slag splashing furnace protection operation on the converter.
After comparing the current pressure with the standard pressure, the method comprises the following steps:
if the current pressure and the standard pressure meet the condition that Y is more than 0.8Y and less than or equal to 1.0Y, controlling the bottom blowing flow to increase by 20-30%; preferably, it is 20%.
And controlling slag splashing to protect the path immediately after tapping of the converter is finished, controlling the slag splashing time of the converter to be not more than 2min, and controlling the adding amount of slag splashing to be 0.
After comparing the current pressure with the standard pressure, the method comprises the following steps:
if the current pressure and the standard pressure meet the condition that Y is more than 1.0Y and less than or equal to 1.3Y, controlling the bottom blowing flow to be increased by 40-60%, preferably 50%; and controlling the converter to perform slag pouring operation after tapping, and not performing slag splashing furnace protection operation.
After comparing the current pressure with the standard pressure, the method comprises the following steps:
if the current pressure and the standard pressure meet 1.3Y and are less than Y, carrying out bottom-melting operation on the converter;
when the converter is operated to convert the furnace bottom, the height of the oxygen lance position is controlled to be 3-4 m, and the oxygen supply intensity of the oxygen lance is controlled to be 2-3 Nm3And/t/min, controlling the operation time of the furnace bottom to be 1-3 min, preferably 2 min.
Therefore, the bottom blowing process is dynamically adjusted according to the actual bottom blowing state of the converter, the bottom blowing effect is ensured, the carbon-oxygen deposit is effectively controlled, the dephosphorization effect is ensured, and the product quality is further improved.
Example two
According to the same inventive concept, the present embodiment also provides a bottom blowing apparatus of a converter, as shown in fig. 3, the apparatus comprising: the device comprises an acquisition unit 31, a search unit 32, a comparison unit 33 and a sending unit 34; wherein,
the acquisition unit 31 is used for acquiring the current pressure in the converter bottom blowing pipeline; and transmits the pressure to a controller in real time, wherein the controller can be a Programmable Logic Controller (PLC).
The preset bottom blowing flow rates are different for different converters, the searching unit 32 needs to obtain the preset bottom blowing flow rate for the bottom blowing pipeline, and search for corresponding standard pressure according to the preset bottom blowing flow rate and a mapping relation, where the mapping relation is used for representing a corresponding relation between the bottom blowing flow rate and the standard pressure.
For example, for a single bottom-blowing line, the bottom-blowing flow rate is preset to be 100Nm3At the hour, the standard pressure value of the empty furnace is 0.2 MPa; the preset bottom blow flow rate was set to 200Nm3At the hour, the standard pressure value of the empty furnace is 0.4 MPa; the preset bottom blowing flow rate is 300Nm3At the hour, the standard pressure value of the empty furnace is 0.6 MPa; the preset bottom blowing flow rate is 400Nm3At the hour, the standard pressure value of the empty furnace is 0.8 MPa; the preset bottom blowing flow rate is 500Nm3The standard pressure value in the empty state of the furnace is 1.0 MPa.
In practical application, the mapping table stores the bottom blowing flow and the corresponding standard pressure value, so that after the searching unit 32 obtains the preset bottom blowing flow, the corresponding standard pressure value can be searched in the mapping table.
After the current pressure and the standard pressure are obtained, the comparing unit 33 is used for comparing the current pressure and the standard pressure, and if the current pressure and the standard pressure Y meet that Y is less than or equal to 0.1Y, the bottom blowing pipeline is determined to be damaged; wherein Y is the current pressure and Y is the standard pressure.
The sending unit 34 sends a prompt message that the bottom blowing pipeline needs to be replaced to a user through the upper computer so as to prompt an operator to replace the bottom blowing pipeline as soon as possible and guarantee the bottom blowing effect.
As an alternative embodiment, the comparison unit 33 is further configured to: and if the current pressure and the standard pressure meet the condition that Y is more than 0.1Y and less than or equal to 0.5Y, determining that the bottom blowing pipeline leaks air.
The sending unit 34 is further configured to: and sending prompt information for air leakage maintenance of the bottom blowing pipeline, and prompting an operator to perform air leakage maintenance on the bottom blowing pipeline.
As an alternative embodiment, the comparison unit 33 is further configured to: if the current pressure and the standard pressure meet the condition that Y is more than 0.5Y and less than or equal to 0.8Y, determining that the bottom blowing pipeline is in a normal state;
the sending unit 34 is further configured to: and sending prompt information for carrying out conventional slag splashing furnace protection operation on the converter.
As an alternative embodiment, the comparison unit 33 is further configured to: if the current pressure and the standard pressure meet the condition that Y is more than 0.8Y and less than or equal to 1.0Y, controlling the bottom blowing flow to increase by 20-30%; preferably, it is 20%.
And controlling slag splashing to protect the path immediately after tapping of the converter is finished, controlling the slag splashing time of the converter to be not more than 2min, and controlling the adding amount of slag splashing to be 0.
As an alternative embodiment, the comparison unit 33 is further configured to: if the current pressure and the standard pressure meet the condition that Y is more than 1.0Y and less than or equal to 1.3Y, controlling the bottom blowing flow to be increased by 40-60%, preferably 50%; and controlling the converter to perform slag pouring operation after tapping, and not performing slag splashing furnace protection operation.
As an alternative embodiment, the comparison unit 33 is further configured to: if the current pressure and the standard pressure meet 1.3Y and are less than Y, carrying out bottom-melting operation on the converter;
when the converter is operated to convert the furnace bottom, the height of the oxygen lance position is controlled to be 3-4 m, and the oxygen supply intensity of the oxygen lance is controlled to be 2-3 Nm3And/t/min, and controlling the operation time of the furnace bottom to be 1-3 min.
Therefore, the bottom blowing process is dynamically adjusted according to the actual bottom blowing state of the converter, the bottom blowing effect is ensured, the carbon-oxygen deposit is effectively controlled, the dephosphorization effect is ensured, and the product quality is further improved.
EXAMPLE III
In practical application, when a 210t top-bottom combined blown converter in a certain steel mill is smelted, in the actual blowing process, when the 807 th converter is blown, the bottom blowing flow is set to be 200Nm3H, replacing the bottom blowing pipeline when the single pipe pressure of the furnace is 0.03 MPa; the carbon oxygen deposition is controlled to be 0.0020, and the dephosphorization rate is 85 percent.
When converting the 1251 st furnace, the preset bottom blowing flow rate is 200Nm3H, maintaining the gas leakage place when the single tube pressure of the furnace is 0.15 MPa; the carbon oxygen deposition is controlled to be 0.0022, and the dephosphorization rate is 88 percent.
When converting the 2537 th furnace, the preset bottom blowing flow rate is 200Nm3H, when the single tube pressure of the furnace is 0.28MPa, the conventional slag splashing furnace protection operation is adopted; the carbon oxygen deposition is controlled to be 0.0023, and the dephosphorization rate is 88 percent.
When converting into furnace 3746, the preset bottom blowing flow rate is 200Nm3H, the single tube pressure of the furnace is 0.39MPa, the bottom blowing flow of the single bottom blowing element is increased to 240Nm3Controlling slag splashing and furnace protection immediately after tapping, controlling the addition amount of slag splashing materials to be 0, and controlling the time of slag splashing for the next furnace to be 1.5 min; the carbon oxygen deposition is controlled to be 0.0024, and the dephosphorization rate is 90 percent.
When the furnace 4748 is blown, the preset bottom blowing flow rate is 200Nm3H, the single tube pressure of the furnace is 0.49MPa, the bottom blowing flow of the single bottom blowing element is increased to 310Nm3H, simultaneously pouring slag immediately after tapping is finished, and not performing slag splashing furnace protection operation; the carbon oxygen deposition is controlled to be 0.0022, and the dephosphorization rate is 85 percent.
When the 5788 th furnace is blown, the preset bottom blowing flow rate is 200Nm3The pressure of a single tube of the heat is 0.54MPa, the operation of the bottom of the furnace is adopted, the position of an oxygen lance is controlled to be 3.5m, and the oxygen supply intensity of the oxygen lance is controlled to be 2Nm3T/min, controlling the operation time of the furnace bottom to be 1 min; the carbon oxygen deposition is controlled to be 0.0024, and the dephosphorization rate is 87%.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A method of bottom blowing a converter, the method comprising:
collecting the current pressure in a converter bottom blowing pipeline;
acquiring a preset bottom blowing flow rate aiming at the bottom blowing pipeline, and searching a corresponding standard pressure according to the preset bottom blowing flow rate and a mapping relation, wherein the mapping relation is used for representing the corresponding relation between the bottom blowing flow rate and the standard pressure;
comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure meet that Y is less than or equal to 0.1Y, determining that the bottom blowing pipeline is damaged;
sending prompt information that the bottom blowing pipeline needs to be replaced; wherein Y is the current pressure and Y is the standard pressure.
2. The method of claim 1, wherein said comparing said current pressure to said standard pressure comprises:
if the current pressure and the standard pressure meet the condition that Y is more than 0.1Y and less than or equal to 0.5Y, determining that the bottom blowing pipeline leaks air;
and sending prompt information for air leakage maintenance of the bottom blowing pipeline.
3. The method of claim 1, wherein said comparing said current pressure to said standard pressure comprises:
if the current pressure and the standard pressure meet the condition that Y is more than 0.5Y and less than or equal to 0.8Y, determining that the bottom blowing pipeline is in a normal state;
and sending prompt information for carrying out conventional slag splashing furnace protection operation on the converter.
4. The method of claim 1, wherein said comparing said current pressure to said standard pressure comprises:
if the current pressure and the standard pressure meet the condition that Y is more than 0.8Y and less than or equal to 1.0Y, controlling the bottom blowing flow to be increased by 20-30%;
and controlling the slag splashing time of the converter heat to be not more than 2min, and controlling the addition of slag splashing materials to be 0.
5. The method of claim 1, wherein said comparing said current pressure to said standard pressure comprises:
if the current pressure and the standard pressure meet the condition that Y is more than 1.0Y and less than or equal to 1.3Y, controlling the bottom blowing flow to be increased by 40-60%;
and controlling the converter to carry out slag dumping operation after tapping.
6. The method of claim 1, wherein said comparing said current pressure to said standard pressure comprises:
if the current pressure and the standard pressure meet 1.3Y and are less than Y, carrying out bottom melting operation on the converter;
when the converter is operated at the bottom of the converter, the height of the oxygen lance is controlled to be 3-4 m, and the oxygen supply intensity of the oxygen lance is controlled to be 2-3 Nm3And/t/min, and controlling the operation time of the furnace bottom to be 1-3 min.
7. A bottom blowing apparatus for a converter, the apparatus comprising:
the acquisition unit is used for acquiring the current pressure in the converter bottom blowing pipeline;
the searching unit is used for acquiring a preset bottom blowing flow rate aiming at the bottom blowing pipeline and searching a corresponding standard pressure according to the preset bottom blowing flow rate and a mapping relation, wherein the mapping relation is used for representing the corresponding relation between the bottom blowing flow rate and the standard pressure;
the comparison unit is used for comparing the current pressure with the standard pressure, and if the current pressure and the standard pressure Y meet the condition that Y is less than or equal to 0.1Y, the bottom blowing pipeline is determined to be damaged;
the sending unit is used for sending prompt information that the bottom blowing pipeline needs to be replaced; wherein Y is the current pressure and Y is the standard pressure.
8. The apparatus of claim 7, wherein the comparison unit is further to:
if the current pressure and the standard pressure meet the condition that Y is more than 0.1Y and less than or equal to 0.5Y, determining that the bottom blowing pipeline leaks air;
and the sending unit is also used for sending prompt information for air leakage maintenance of the bottom blowing pipeline.
9. The apparatus of claim 7, wherein the comparison unit is further to:
if the current pressure and the standard pressure meet the condition that Y is more than 0.5Y and less than or equal to 0.8Y, determining that the bottom blowing pipeline is in a normal state;
and sending prompt information for carrying out conventional slag splashing furnace protection operation on the converter.
10. The apparatus of claim 7, wherein the comparison unit is further to:
if the current pressure and the standard pressure meet the condition that Y is more than 0.8Y and less than or equal to 1.0Y, controlling the bottom blowing flow to be increased by 20-30%;
and controlling the slag splashing time of the converter heat to be not more than 2min, and controlling the addition of slag splashing materials to be 0.
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| CN101487070A (en) * | 2009-02-23 | 2009-07-22 | 钢铁研究总院 | Method for improving combined blown converter campaign length by metal furnace cinder composite mushroom |
| CN102094105A (en) * | 2009-12-09 | 2011-06-15 | 攀钢集团钢铁钒钛股份有限公司 | Bottom blowing system for converter |
| CN102041346A (en) * | 2010-12-28 | 2011-05-04 | 北京建龙重工集团有限公司 | Method for automatic bottom blowing control of converter |
| CN102943149A (en) * | 2012-11-07 | 2013-02-27 | 河北省首钢迁安钢铁有限责任公司 | Device and method for judging leakage amount of ladle bottom blowing pipeline |
| CN103196811A (en) * | 2013-04-11 | 2013-07-10 | 莱芜钢铁集团有限公司 | Online detecting method and device of air permeability of steel ladle |
| CN204185509U (en) * | 2014-11-18 | 2015-03-04 | 武汉钢铁(集团)公司 | Bottom-blowing of converter nitrogen valve valve blow-by proofing unit |
| CN204897961U (en) * | 2015-08-11 | 2015-12-23 | 内蒙古包钢钢联股份有限公司 | Nitrogen valve valve blow -by automated inspection alarm device at bottom of converter |
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