CN110835668A - Efficient furnace protection method - Google Patents
Efficient furnace protection method Download PDFInfo
- Publication number
- CN110835668A CN110835668A CN201911143835.1A CN201911143835A CN110835668A CN 110835668 A CN110835668 A CN 110835668A CN 201911143835 A CN201911143835 A CN 201911143835A CN 110835668 A CN110835668 A CN 110835668A
- Authority
- CN
- China
- Prior art keywords
- slag
- furnace
- converter
- protection method
- splashing
- 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
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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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 invention relates to the technical field of steelmaking equipment, in particular to a high-efficiency furnace protection method, which comprises the following operation steps: firstly, after the steel of the previous furnace is tapped, shaking liquid slag to a large surface damaged position of a converter lining; secondly, adding 2-3 tons of raw dolomite into the furnace; thirdly, the converter is shaken forwards to ensure that the raw dolomite and the slag are fully contacted and spread on the large-surface damaged position; fourthly, sintering for about 3 minutes, shaking the converter to a slag splashing protection position, and splashing the slag. And fifthly, pouring out the residual slag, and directly adding the waste steel by adopting slag retention operation if the slag amount is not large. The method provided by the invention has high repairing efficiency and low cost.
Description
Technical Field
The invention relates to the technical field of steelmaking equipment, in particular to a high-efficiency furnace protection method.
Background
The smelting end point temperature of the converter is up to 1680 ℃, the lining brick in the lining smelting period is influenced by rapid cooling and rapid heating caused by high temperature, strong oxidizing property, oxygen jet flushing and iron adding and scrap steel adding operation, the lining is eroded by physics and chemistry and becomes thinner, especially the position of the steel surface impact area of the converter, if the converter is not repaired in time, large-surface steel penetration is caused quickly, and serious malignant production and safety accidents are caused. The existing treatment methods all adopt a mode of repairing after damage, and specifically comprise the following three repairing methods:
1. patching a damaged position by using a magnesia-carbon brick containing magnesia and a binder (asphalt or resin), and then sintering at a high temperature for more than 60 minutes to repair the damaged position;
2. feeding an unshaped feeding material containing magnesite and a binder (asphalt or resin) to a damaged position, and then sintering at high temperature for more than 60 minutes to repair the damaged position;
3. wet spray-repairing, namely mixing the magnesia powder, the resin and water by using a spray gun, spraying the mixture to a damaged position, and sintering for 20 minutes;
the first method and the second method have high furnace repairing cost and long sintering time, and seriously affect the operation rate and the production cost of the converter. In the third method, the proportion of the materials and the water is adjusted properly, only one layer can be sprayed at a time, the sprayed layer is easy to fall off after being sprayed more, and the spray repair effect is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing an efficient furnace protection method with high repair efficiency and low cost.
The invention is realized by the following technical scheme:
an efficient furnace protection method comprises the following operation steps:
firstly, after the steel of the previous furnace is tapped, shaking liquid slag to a large surface damaged position of a converter lining;
secondly, adding 2-3 tons of raw dolomite into the furnace;
thirdly, the converter is shaken forwards to ensure that the raw dolomite and the slag are fully contacted and spread on the large-surface damaged position;
fourthly, sintering for about 3 minutes, shaking the converter to a slag splashing protection position, and splashing the slag.
And fifthly, pouring out the residual slag, and directly adding the waste steel by adopting slag retention operation if the slag amount is not large.
Optimally, the lumpiness of the raw dolomite is 80-150 mm.
The invention has the advantages of
The high-efficiency furnace protection method can shorten the time for repairing the furnace from the original 60 minutes to 5 minutes, and can simultaneously clean the accumulated slag at the furnace mouth, and the furnace can be protected for about 5 hours each time;
the fettling cost is reduced to 0.05 yuan/ton steel.
Detailed Description
An efficient furnace protection method comprises the following operation steps:
firstly, after the steel of the previous furnace is tapped, shaking liquid slag to a large surface damaged position of a converter lining;
secondly, adding 2-3 tons of raw dolomite into the furnace;
thirdly, the converter is shaken forwards to ensure that the raw dolomite and the slag are fully contacted and spread on the large-surface damaged position;
fourthly, sintering for about 3 minutes, shaking the converter to a slag splashing protection position, and splashing the slag.
And fifthly, pouring out the residual slag, and directly adding the waste steel by adopting slag retention operation if the slag amount is not large.
Optimally, the lumpiness of the raw dolomite is 80-150 mm.
By adopting the high-efficiency furnace protection method provided by the invention, the time for repairing the furnace can be shortened to 3 minutes from the original 60 minutes, and the accumulated slag at the furnace mouth can be cleaned simultaneously, and the furnace can be protected for about 5 hours each time;
the fettling cost is reduced to 0.05 yuan/ton steel.
In conclusion, the high-efficiency furnace protection method has high repair efficiency and low cost.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The high-efficiency furnace protection method is characterized by comprising the following operation steps:
firstly, after the steel of the previous furnace is tapped, shaking liquid slag to a large surface damaged position of a converter lining;
secondly, adding 2-3 tons of raw dolomite into the furnace;
thirdly, the converter is shaken forwards to ensure that the raw dolomite and the slag are fully contacted and spread on the large-surface damaged position;
fourthly, sintering for about 3 minutes, shaking the converter to a slag splashing protection position, and splashing the slag.
And fifthly, pouring out the residual slag, and directly adding the waste steel by adopting slag retention operation if the slag amount is not large.
2. A high efficiency furnace protection method as claimed in claim 1, wherein the raw dolomite has a lumpiness of 80-150 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911143835.1A CN110835668A (en) | 2019-11-20 | 2019-11-20 | Efficient furnace protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911143835.1A CN110835668A (en) | 2019-11-20 | 2019-11-20 | Efficient furnace protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110835668A true CN110835668A (en) | 2020-02-25 |
Family
ID=69576910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911143835.1A Pending CN110835668A (en) | 2019-11-20 | 2019-11-20 | Efficient furnace protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110835668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877494A (en) * | 2021-01-13 | 2021-06-01 | 广东韶钢松山股份有限公司 | Furnace protection method of converter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2397253C1 (en) * | 2008-12-29 | 2010-08-20 | ФГУП "Центральный научно-исследовательский институт черной металлургии имени И.П. Бардина" | Procedure for application of slag scull on converter lining |
| KR101045969B1 (en) * | 2004-03-18 | 2011-07-04 | 주식회사 포스코 | Furnace upbringing method using decarburization slag of converter itself |
| CN104531940A (en) * | 2015-01-05 | 2015-04-22 | 山东钢铁股份有限公司 | Converter final slag thickening method |
| CN104694692A (en) * | 2015-03-20 | 2015-06-10 | 山东钢铁股份有限公司 | Method using converter slags to carry out fettling |
| CN107287382A (en) * | 2017-08-23 | 2017-10-24 | 首钢长治钢铁有限公司 | A kind of method of remained converter slag slag removing and furnace protecting |
| CN108728603A (en) * | 2018-06-28 | 2018-11-02 | 承德建龙特殊钢有限公司 | A kind of method of quick fettling |
| CN109504816A (en) * | 2019-01-16 | 2019-03-22 | 山东莱钢永锋钢铁有限公司 | A kind of fast fettling bottom system and method |
-
2019
- 2019-11-20 CN CN201911143835.1A patent/CN110835668A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101045969B1 (en) * | 2004-03-18 | 2011-07-04 | 주식회사 포스코 | Furnace upbringing method using decarburization slag of converter itself |
| RU2397253C1 (en) * | 2008-12-29 | 2010-08-20 | ФГУП "Центральный научно-исследовательский институт черной металлургии имени И.П. Бардина" | Procedure for application of slag scull on converter lining |
| CN104531940A (en) * | 2015-01-05 | 2015-04-22 | 山东钢铁股份有限公司 | Converter final slag thickening method |
| CN104694692A (en) * | 2015-03-20 | 2015-06-10 | 山东钢铁股份有限公司 | Method using converter slags to carry out fettling |
| CN107287382A (en) * | 2017-08-23 | 2017-10-24 | 首钢长治钢铁有限公司 | A kind of method of remained converter slag slag removing and furnace protecting |
| CN108728603A (en) * | 2018-06-28 | 2018-11-02 | 承德建龙特殊钢有限公司 | A kind of method of quick fettling |
| CN109504816A (en) * | 2019-01-16 | 2019-03-22 | 山东莱钢永锋钢铁有限公司 | A kind of fast fettling bottom system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877494A (en) * | 2021-01-13 | 2021-06-01 | 广东韶钢松山股份有限公司 | Furnace protection method of converter |
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| Date | Code | Title | Description |
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| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200225 |