CN111485053A - Steel tapping hole square brick maintenance method - Google Patents
Steel tapping hole square brick maintenance method Download PDFInfo
- Publication number
- CN111485053A CN111485053A CN202010301914.7A CN202010301914A CN111485053A CN 111485053 A CN111485053 A CN 111485053A CN 202010301914 A CN202010301914 A CN 202010301914A CN 111485053 A CN111485053 A CN 111485053A
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- CN
- China
- Prior art keywords
- converter
- parts
- slag
- hand
- maintaining
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- 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.)
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Classifications
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- 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
- C21C5/445—Lining or repairing the taphole
-
- 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
- C21C5/445—Lining or repairing the taphole
- C21C2005/446—Dry linings
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Charging Or Discharging (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a maintenance method of a square brick at a steel tapping hole, which adopts hand-feeding materials capable of being rapidly sintered for repairing, and comprises the following specific steps: A. pretreatment: after the converter is subjected to slag splashing protection, the residues in the converter are poured out, and the converter is shaken to a certain angle at the steel tapping side; B. putting a slag blocking plug: a slag stopping plug is put from an inner hole of the converter to block the steel tapping hole; C. repairing and maintaining: the square brick part of the steel outlet is leveled with the surrounding furnace lining by using hand feeding and scattering, and the sintering is carried out by using oxygen to lead the hand feeding to be rapidly sintered and hardened; D. removing the slag blocking plug: when the hand-throwing material does not smoke, the converter is shaken up, and the slag blocking plug is broken and fallen from the outside to the inside.
Description
Technical Field
The invention relates to a maintenance method of a square brick of a steel tapping hole, which is used for maintaining the steel tapping hole of a converter.
Background
Because the square bricks at the steel tapping hole of the converter have potential quality hazards (cracks are found when the first steel tapping hole brick is replaced), the square bricks are fast eroded after being put into production and are funnel-shaped, and are easy to block after a slag stopper is put into steel tapping, and the square bricks are poked off by using a thick steel chisel with the help of a plurality of manual efforts, thereby wasting time and labor; when the square bricks are maintained by feeding by hands, the feeding by hands flows away from the steel tapping hole along the inclined plane, the maintenance effect is poor, and the service life of the steel tapping hole bricks is short; and a large amount of gunning materials are needed to be gunned around the square bricks when the steel tapping hole is replaced every time, the square bricks are not easy to dry and sinter, and the hidden danger that operators are scalded by steel slag splashed during steel tapping is generated.
Disclosure of Invention
The invention aims to provide a steel-tapping hole square brick maintenance method which can be used for quickly sintering, is short in maintenance time, can prevent hand-thrown materials from flowing out of a steel-tapping hole, is good in maintenance effect and strong in hand-thrown material binding force.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a maintenance method of a square brick at a steel tapping hole adopts hand feeding capable of fast sintering for repairing.
The technical scheme of the invention is further improved as follows: the method comprises the following specific steps:
A. pretreatment: after the converter is subjected to slag splashing protection, the residues in the converter are poured out, and the converter is shaken to a certain angle at the steel tapping side;
B. putting a slag blocking plug: a slag stopping plug is put from an inner hole of the converter to block the steel tapping hole;
C. repairing and maintaining: the square brick part of the steel outlet is leveled with the surrounding furnace lining by using hand feeding and scattering, and the sintering is carried out by using oxygen to lead the hand feeding to be rapidly sintered and hardened;
D. removing the slag blocking plug: when the manual feeding is not smoked, the converter is shaken up, and the slag blocking plug is broken from outside to inside and falls off.
The technical scheme of the invention is further improved as follows: and B, in the step A, the converter is shaken to the tapping side by 103 degrees.
The technical scheme of the invention is further improved as follows: the hand-feeding material comprises the following components in parts by weight: high-purity magnesite: 30-40 parts of fused magnesia: 40-50 parts of silicon carbide: 1-5 parts of synthetic resin: 10-25 parts, and the balance is impurities.
The technical scheme of the invention is further improved as follows: the hand-feeding material comprises the following components in parts by weight: high-purity magnesite: 35 parts of fused magnesia: 40 parts, silicon carbide: 3 parts, synthetic resin: 20 parts, and the balance is impurities.
The technical scheme of the invention is further improved as follows: and the sintering time in the step C is 7-8 min.
The technical scheme of the invention is further improved as follows: the main component of the slag stopper is high-alumina cement.
The technical scheme of the invention is further improved as follows: the shape of the slag stopper is conical.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the manual feeding material of the invention is mainly a mixture of high-purity magnesite and fused magnesite, and is matched with synthetic resin, when the manual feeding material is sintered by using oxygen, the sintering time is 7-8min, the sintering speed is high, the maintenance time is short, and meanwhile, the bonding force is strong, and the service life is long.
2. When the invention is maintained, the converter is shaken to the steel tapping side at the temperature of 100-105 ℃, so that slag blocking is conveniently thrown in from the inner hole of the converter to block the steel tapping hole, hand feeding is conveniently spread and supplemented, and the hand feeding is not easy to flow away after being melted.
3. The main component of the slag stopper is high-alumina cement, so that the slag stopper can be prevented from being damaged by high temperature after the slag stopper is melted by hand, and is broken easily when the slag stopper is removed, and the steel-tapping hole can be plugged by the conical design of the slag stopper, so that the slag stopper cannot flow away from the steel-tapping hole by hand, and cannot be sunk too deeply and is convenient for follow-up removal of the slag stopper.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
a maintenance method of a square brick at a steel tapping hole adopts hand feeding capable of fast sintering for repairing.
The method comprises the following specific steps:
A. pretreatment: after the converter is subjected to slag splashing protection, the residues in the converter are poured out, and the converter is shaken to the steel tapping side at 100-105 ℃;
B. putting a slag blocking plug: a slag stopping plug is put from an inner hole of the converter to block the steel tapping hole;
C. repairing and maintaining: the square brick part of the steel outlet is leveled with the surrounding furnace lining by using hand feeding and scattering, and the sintering is carried out by using oxygen to lead the hand feeding to be rapidly sintered and hardened;
D. removing the slag blocking plug: when the manual feeding is not smoked, the converter is shaken up, and the slag blocking plug is broken from outside to inside and falls off.
Wherein, the hand-throwing material comprises the following components in percentage by weight: high-purity magnesite: 30-40 parts of fused magnesia: 40-50 parts of silicon carbide: 1-5 parts of synthetic resin: 10-25 parts, and the balance is impurities. The sintering time of hand feeding is 7-8 min.
The main component of the slag stopper is high-alumina cement and is arranged to be conical.
Example 1:
A. pretreatment: after the converter is subjected to slag splashing protection, residues in the converter are poured completely, and the converter is shaken to the steel tapping side by 103 degrees, so that slag blocking plugs are conveniently thrown from the inner hole of the converter to block the steel tapping hole, hand feeding is conveniently sprinkled and supplemented, and the hand feeding is not easy to flow away after being melted.
B. Putting a slag blocking plug: a slag stopping plug is put from an inner hole of the converter to block the steel tapping hole; the main component of the slag stopper is high alumina cement and is designed to be conical.
C. Repairing and maintaining: the square brick part of the steel outlet is leveled with the surrounding furnace lining by using hand feeding and scattering, and the sintering is carried out by using oxygen to lead the hand feeding to be rapidly sintered and hardened;
D. removing the slag blocking plug: when the manual feeding is not smoked, the converter is shaken up, and the slag blocking plug is broken from outside to inside and falls off.
Wherein, the hand-throwing material comprises the following components in percentage by weight: high-purity magnesite: 35 parts of fused magnesia: 40 parts, silicon carbide: 3 parts, synthetic resin: 20 parts, and the balance is impurities. And C, sintering time of manual feeding in the step C is 7-8min, sintering speed is high, maintenance time is short, and meanwhile, the adhesive force is strong and the service life is long.
The main component of the slag stopper is high-alumina cement, so that the slag stopper can be prevented from being damaged by high temperature after the slag stopper is melted by hand, and is broken easily when the slag stopper is removed, and the steel-tapping hole can be plugged by the conical design of the slag stopper, so that the slag stopper cannot flow away from the steel-tapping hole by hand, and cannot be sunk too deeply and is convenient for follow-up removal of the slag stopper.
Claims (8)
1. A maintenance method of a square brick at a steel tapping hole is characterized by comprising the following steps: the hand-fed material capable of being rapidly sintered is adopted for repairing.
2. The method of claim 1, wherein the method of maintaining a square tap hole brick comprises: the method comprises the following specific steps:
A. pretreatment: after the converter is subjected to slag splashing protection, the residues in the converter are poured out, and the converter is shaken to a certain angle at the steel tapping side;
B. putting a slag blocking plug: a slag stopping plug is put from an inner hole of the converter to block the steel tapping hole;
C. repairing and maintaining: the square brick part of the steel outlet is leveled with the surrounding furnace lining by using hand feeding and scattering, and the sintering is carried out by using oxygen to lead the hand feeding to be rapidly sintered and hardened;
D. removing the slag blocking plug: when the manual feeding is not smoked, the converter is shaken up, and the slag blocking plug is broken from outside to inside and falls off.
3. The method of claim 2, wherein the method of maintaining a square tap hole brick comprises: and B, in the step A, the converter is shaken to the tapping side of 100-105 degrees.
4. The method of claim 2, wherein the method of maintaining a square tap hole brick comprises: the hand-feeding material comprises the following components in parts by weight: high-purity magnesite: 30-40 parts of fused magnesia: 40-50 parts of silicon carbide: 1-5 parts of synthetic resin: 10-25 parts, and the balance is impurities.
5. The method of claim 4, wherein the method of maintaining a square tap hole brick comprises: the hand-feeding material comprises the following components in parts by weight: high-purity magnesite: 35 parts of fused magnesia: 40 parts, silicon carbide: 3 parts, synthetic resin: 20 parts, and the balance is impurities.
6. The method of claim 5, wherein the method of maintaining a square tap hole brick comprises: and the sintering time in the step C is 7-8 min.
7. The method of claim 2, wherein the method of maintaining a square tap hole brick comprises: the main component of the slag stopper is high-alumina cement.
8. The method of claim 7, wherein the method of maintaining a square tap hole brick comprises: the shape of the slag stopper is conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010301914.7A CN111485053A (en) | 2020-04-16 | 2020-04-16 | Steel tapping hole square brick maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010301914.7A CN111485053A (en) | 2020-04-16 | 2020-04-16 | Steel tapping hole square brick maintenance method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111485053A true CN111485053A (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010301914.7A Pending CN111485053A (en) | 2020-04-16 | 2020-04-16 | Steel tapping hole square brick maintenance method |
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| CN (1) | CN111485053A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55138014A (en) * | 1979-04-11 | 1980-10-28 | Nippon Steel Corp | Method of repairing steel outlet port at converter |
| CN201313919Y (en) * | 2008-12-15 | 2009-09-23 | 鞍钢股份有限公司 | Auxiliary repairing device for inner hole of converter steel tapping hole |
| CN101792842A (en) * | 2010-02-24 | 2010-08-04 | 南京钢铁股份有限公司 | Converter taphole filler-replacing method |
| JP2011179040A (en) * | 2010-02-26 | 2011-09-15 | Sumitomo Metal Ind Ltd | Method for repairing steel-tapping hole of converter |
| CN102816888A (en) * | 2012-09-25 | 2012-12-12 | 鞍钢股份有限公司 | Method for preventing sintering of steel tapping hole during fettling |
| CN103397138A (en) * | 2013-08-08 | 2013-11-20 | 首钢京唐钢铁联合有限责任公司 | Method for repairing furnace lining of steel tapping hole part of converter |
-
2020
- 2020-04-16 CN CN202010301914.7A patent/CN111485053A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55138014A (en) * | 1979-04-11 | 1980-10-28 | Nippon Steel Corp | Method of repairing steel outlet port at converter |
| CN201313919Y (en) * | 2008-12-15 | 2009-09-23 | 鞍钢股份有限公司 | Auxiliary repairing device for inner hole of converter steel tapping hole |
| CN101792842A (en) * | 2010-02-24 | 2010-08-04 | 南京钢铁股份有限公司 | Converter taphole filler-replacing method |
| JP2011179040A (en) * | 2010-02-26 | 2011-09-15 | Sumitomo Metal Ind Ltd | Method for repairing steel-tapping hole of converter |
| CN102816888A (en) * | 2012-09-25 | 2012-12-12 | 鞍钢股份有限公司 | Method for preventing sintering of steel tapping hole during fettling |
| CN103397138A (en) * | 2013-08-08 | 2013-11-20 | 首钢京唐钢铁联合有限责任公司 | Method for repairing furnace lining of steel tapping hole part of converter |
Non-Patent Citations (2)
| Title |
|---|
| 吕亚等: "安钢150t转炉中后期炉衬的维护实践", 《江西冶金》 * |
| 李春民: "新型材质出钢口砖的研制及其在双床平炉上的应用", 《鞍钢技术》 * |
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Application publication date: 20200804 |