CN113249541A - Furnace protection method of bottom blowing powder injection converter - Google Patents
Furnace protection method of bottom blowing powder injection converter Download PDFInfo
- Publication number
- CN113249541A CN113249541A CN202110444032.0A CN202110444032A CN113249541A CN 113249541 A CN113249541 A CN 113249541A CN 202110444032 A CN202110444032 A CN 202110444032A CN 113249541 A CN113249541 A CN 113249541A
- Authority
- CN
- China
- Prior art keywords
- furnace
- gun
- slag
- converter
- furnace body
- 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.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007664 blowing Methods 0.000 title claims description 16
- 238000002347 injection Methods 0.000 title claims description 6
- 239000007924 injection Substances 0.000 title claims description 6
- 239000002893 slag Substances 0.000 claims abstract description 40
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 abstract description 4
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000243 solution 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
-
- 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
- C21C5/44—Refractory linings
- C21C5/441—Equipment used for making or repairing linings
-
- 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
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
Landscapes
- 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 invention provides a furnace protection method of a bottom-blown powder-spraying converter, which can effectively improve the furnace protection quality of a converter molten pool part, ensure the safety of bottom-sprayed powder converter steelmaking and prolong the service life of a converter lining of the bottom-sprayed powder converter by respectively adopting the modes of bottom gun slag splashing, top gun and bottom gun composite slag splashing and bottom gun slag hanging.
Description
Technical Field
The invention belongs to the technical field of mining smelting, and relates to a furnace protection method of a bottom blowing powder injection converter.
Background
Because the big, molten bath stirring of bottom-blown gas volume of dusting converter steelmaking in-process is strong, the stove bottom receives the influence erosion aggravation that oxygen fire point district temperature is high, increases the erosion to trunnion position molten bath both sides simultaneously, and the molten bath position is the serious region of erosion promptly, and conventional top lance splashes sediment and protects the stove and receive the restriction to the maintenance of furnace lining, causes the stove bottom to rise easily, causes the bottom-blown spray gun to block up.
Disclosure of Invention
The invention aims to provide a furnace protecting method of a bottom blowing powder spraying converter aiming at the problems in the prior art, and solves the problem that the corrosion of the bottom of the converter of a bottom blowing powder spraying gun system is aggravated due to large bottom blowing gas amount and strong molten pool stirring.
Therefore, the invention provides a furnace protection method of a bottom blowing powder injection converter, which comprises the following measures:
a. bottom gun slag splashing: after the tapping of the converter is finished, the flow valve of the bottom blowing spray gun is adjusted to 40-60% of the opening degree, and the flow is 1000-3The slag splashing is carried out on the furnace body part, the operation time is 4-6min, the furnace body stays at the position of 0 ℃ for 2-4min, and the furnace body needs to tilt 30-50 ℃ before and after the furnace when in use;
b. top gun and bottom gun composite slag splashing: staggering the spray holes of the top gun and the bottom gun to reduce mutual interference and avoid the blockage of the bottom gun, wherein the top gun adopts the traditional slag splashing parameters, the flow valve of the bottom gun is adjusted to the opening degree of not less than 80 percent, and the flow is not less than 1900Nm3H, the operation time is 3-5 min;
c. bottom gun slag hanging: when the slag viscosity, the fluidity and the superheat degree of the slag continue to decrease after the slag passes through slag splashing, the flow valve of the bottom blowing spray gun is adjusted to be 25-35 percent of the opening degree, and the flow rate is 600-900Nm3And h, when the furnace is used, the front furnace tilts backwards by 30-50 degrees, the furnace body shakes within the angle range to hang slag on the bottom of the furnace, the operation time is 3-6min, and the furnace body stays at the 0-degree position for 8-15min, so that slag in the furnace is fully combined and attached to the bottom of the furnace, and the thickness of a slag layer of the bottom of the furnace is increased.
The invention has the beneficial effects that:
the invention can be used for various furnaces for smelting molten metal, such as steel-making converter production, bottom blowing powder spraying and the like, and can effectively protect the corrosion of the bottom and the furnace body except the corrosion of the spray gun and the periphery thereof, ensure the balance of the corrosion of the furnace lining and effectively improve the furnace protection quality of the molten pool part of the converter.
Detailed Description
The following describes the technical solution of the present invention with reference to specific embodiments.
A furnace protection method of a bottom blowing powder injection converter comprises the following measures:
a. bottom gun slag splashing: after the tapping of the converter is finished, the flow valve of the bottom blowing spray gun is adjusted to 50 percent of the opening degree, and the flow is 1440Nm3The slag splashing is carried out on the furnace body part, the operation time is 5min, the furnace body stays at the position of 0 ℃ for 3min, and the furnace body needs to tilt 30-50 ℃ before and after the furnace when in use;
b. top gun and bottom gun composite slag splashing: staggering the spray holes of the top gun and the bottom gun to reduce mutual interference and avoid the blockage of the bottom gun, wherein the top gun adopts the traditional slag splashing parameters, the flow valve of the bottom gun is adjusted to the opening degree of not less than 80 percent, and the flow is not less than 1900Nm3H, the operation time is 5 min;
c. bottom gun slag hanging: when the slag viscosity, the fluidity and the superheat degree of the slag continue to decrease after the slag passes through slag splashing, the flow valve of the bottom blowing spray gun is adjusted to 30 percent of the opening degree, and the flow is 900Nm3And h, when the furnace is used, the front furnace tilts backwards by 30-50 degrees, the furnace body shakes within the angle range to hang slag on the bottom of the furnace, the operation time is 5min, and the furnace body stays at the 0-degree position for 12min, so that slag in the furnace is fully combined and attached to the bottom of the furnace, and the thickness of a slag layer at the bottom of the furnace is increased.
By the method, the erosion condition of the furnace bottom is effectively controlled, other parts of the furnace bottom except the position of the spray gun are covered by a 100mm slag layer, and the thickness of the slag layer at the furnace body part is obviously increased.
Claims (1)
1. A furnace protection method of a bottom blowing powder injection converter comprises the following measures:
a. bottom gun slag splashing: after the tapping of the converter is finished, the flow valve of the bottom blowing spray gun is adjusted to 40-60% of the opening degree, and the flow is 1000-3The slag splashing is carried out on the furnace body part, the operation time is 4-6min, the furnace body stays at the position of 0 ℃ for 2-4min, and the furnace body needs to tilt 30-50 ℃ before and after the furnace when in use;
b. top gun and bottom gun composite slag splashing: staggering the spray holes of the top gun and the bottom gun to reduce mutual interference and avoid the blockage of the bottom gun, wherein the top gun adopts the traditional slag splashing parameters, the flow valve of the bottom gun is adjusted to the opening degree of not less than 80 percent, and the flow is not less than 1900Nm3H, the operation time is 3-5 min;
c. bottom gun slag hanging: when the slag is throughThe viscosity, the fluidity and the superheat degree of the slag continue to decrease after the slag overspray, the flow valve of the bottom blowing spray gun is adjusted to be 25-35 percent of the opening degree, and the flow rate is 600-900Nm3And h, when the furnace is used, the front furnace tilts backwards by 30-50 degrees, the furnace body shakes within the angle range to hang slag on the bottom of the furnace, the operation time is 3-6min, and the furnace body stays at the 0-degree position for 8-15min, so that slag in the furnace is fully combined and attached to the bottom of the furnace, and the thickness of a slag layer of the bottom of the furnace is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110444032.0A CN113249541A (en) | 2021-04-23 | 2021-04-23 | Furnace protection method of bottom blowing powder injection converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110444032.0A CN113249541A (en) | 2021-04-23 | 2021-04-23 | Furnace protection method of bottom blowing powder injection converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113249541A true CN113249541A (en) | 2021-08-13 |
Family
ID=77221461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110444032.0A Pending CN113249541A (en) | 2021-04-23 | 2021-04-23 | Furnace protection method of bottom blowing powder injection converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113249541A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09291305A (en) * | 1996-04-26 | 1997-11-11 | Nippon Steel Corp | Method for coating slag splash on inner wall in converter |
| RU2103378C1 (en) * | 1997-01-22 | 1998-01-27 | Игорь Михайлович Шатохин | Method for combined-type blow-through of molten metal in converters |
| SE9803319D0 (en) * | 1998-09-30 | 1998-09-30 | Asea Brown Boveri | Converter process and device with electromagnetic stirrer |
| JP2000313912A (en) * | 1999-04-28 | 2000-11-14 | Nippon Steel Corp | Slag coating method in converter |
| JP2003193123A (en) * | 2001-12-27 | 2003-07-09 | Sumitomo Metal Ind Ltd | Method for repairing converter lining refractory |
| 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 |
| CN102965465A (en) * | 2012-11-21 | 2013-03-13 | 首钢总公司 | Method for curing converter slag |
| CN106702072A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Converter combined blowing method with full-furnace-service bottom gun visible |
| CN109266807A (en) * | 2018-10-29 | 2019-01-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of big flow bottom blowing splashes slag and splashes furnace retaining technique in conjunction with slag phase with top blast |
| CN109811110A (en) * | 2019-04-12 | 2019-05-28 | 山东钢铁股份有限公司 | A kind of accurate slag splashing method of converter |
| CN110343801A (en) * | 2019-08-14 | 2019-10-18 | 东北大学 | A kind of the bottom rifle method for arranging and bottom blowing method of the big converter molten pool stirring of top and bottom complex blowing |
-
2021
- 2021-04-23 CN CN202110444032.0A patent/CN113249541A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09291305A (en) * | 1996-04-26 | 1997-11-11 | Nippon Steel Corp | Method for coating slag splash on inner wall in converter |
| RU2103378C1 (en) * | 1997-01-22 | 1998-01-27 | Игорь Михайлович Шатохин | Method for combined-type blow-through of molten metal in converters |
| SE9803319D0 (en) * | 1998-09-30 | 1998-09-30 | Asea Brown Boveri | Converter process and device with electromagnetic stirrer |
| JP2000313912A (en) * | 1999-04-28 | 2000-11-14 | Nippon Steel Corp | Slag coating method in converter |
| JP2003193123A (en) * | 2001-12-27 | 2003-07-09 | Sumitomo Metal Ind Ltd | Method for repairing converter lining refractory |
| 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 |
| CN102965465A (en) * | 2012-11-21 | 2013-03-13 | 首钢总公司 | Method for curing converter slag |
| CN106702072A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Converter combined blowing method with full-furnace-service bottom gun visible |
| CN109266807A (en) * | 2018-10-29 | 2019-01-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of big flow bottom blowing splashes slag and splashes furnace retaining technique in conjunction with slag phase with top blast |
| CN109811110A (en) * | 2019-04-12 | 2019-05-28 | 山东钢铁股份有限公司 | A kind of accurate slag splashing method of converter |
| CN110343801A (en) * | 2019-08-14 | 2019-10-18 | 东北大学 | A kind of the bottom rifle method for arranging and bottom blowing method of the big converter molten pool stirring of top and bottom complex blowing |
Non-Patent Citations (5)
| Title |
|---|
| LI YONG等: "contrast of metallurgical results between top blowing and combined blowing converter", 《JOURNAL OF IRON AND STEEL RESEARCH》 * |
| 廖广府等: "210t顶底复吹转炉溅渣护炉模拟研究", 《过程工程学报》 * |
| 朱英雄: "转炉溅渣护炉技术（一）", 《炼钢》 * |
| 杨铁城: "酒钢转炉溅渣护炉技术优化研究", 《中国优秀博硕士学位论文全文数据库 (硕士)工程科技Ⅰ辑》 * |
| 武钢第二炼钢厂: "《复吹转炉溅渣护炉实用技术》", 30 April 2004 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210813 |
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| RJ01 | Rejection of invention patent application after publication |