CN110962228B - Method for repairing KR stirring paddle - Google Patents
Method for repairing KR stirring paddle Download PDFInfo
- Publication number
- CN110962228B CN110962228B CN201911302851.0A CN201911302851A CN110962228B CN 110962228 B CN110962228 B CN 110962228B CN 201911302851 A CN201911302851 A CN 201911302851A CN 110962228 B CN110962228 B CN 110962228B
- Authority
- CN
- China
- Prior art keywords
- stirring paddle
- grinding tool
- steel grinding
- steel
- refractory
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a method for repairing KR stirring paddle, which comprises the steps of manufacturing a steel grinding tool in advance, wherein the shape of the steel grinding tool is the same as that of the KR stirring paddle, the top surface of the steel grinding tool is open, the open size of the top surface of the steel grinding tool is suitable for directly placing the KR stirring paddle in the steel grinding tool, placing 150Kg of sintering refractory material with fluidity in the steel grinding tool, placing the steel grinding tool on a stirring paddle replacing trolley, after the desulfuration of the stirring paddle is finished, the replacing trolley is opened to be under the stirring paddle, slowly descending the stirring paddle to enable the stirring paddle to fall into the steel grinding tool, extruding the refractory material in the steel grinding tool on the surface of the stirring paddle by the stirring paddle in the descending process, sintering the refractory material repairing material by utilizing the self heat of the stirring paddle, well sintering the refractory material on the surface of the stirring paddle, directly inserting the steel and the KR stirring paddle into molten iron for desulfuration after the refractory material is completely sintered, the outer layer of the stirring paddle is made of steel, so that the new refractory repair material is protected.
Description
Technical Field
The invention relates to a method for repairing a KR stirring paddle.
Background
The eight-steel steelmaking pre-desulfurization adopts a KR stirring desulfurization mode, wherein the main structure of the stirring paddle is formed by knotting and firing a central steel structure support frame and outer refractory materials. When the stirring paddle is used for desulfurization, the stirring paddle needs to be inserted into molten iron, the stirring paddle rotates at low, medium and high speeds in different desulfurization periods, molten iron is stirred for desulfurization, and the external refractory of the stirring paddle is subjected to thermal deformation and mechanical rotation friction in the process, so that the corrosion loss and surface cracking of the refractory on the surface of the stirring paddle are caused.
Disclosure of Invention
The invention aims to provide a method for repairing a KR stirring paddle, which can enable a refractory repairing material to be well sintered on the surface of the stirring paddle and has the function of repairing the surface of the stirring paddle.
The invention aims to realize the method for repairing the KR stirring paddle, a steel grinding tool is manufactured in advance, the shape of the steel grinding tool is the same as that of the KR stirring paddle, the top surface of the steel grinding tool is opened, the opening size of the top surface of the steel grinding tool is proper, the KR stirring paddle can be directly placed in the steel grinding tool, 150Kg of refractory repair material with fluidity is placed in the steel grinding tool, the steel grinding tool is placed on a stirring paddle replacing trolley, the stirring paddle is desulfurized, the stirring paddle replacing trolley is opened to be right below the stirring paddle, the stirring paddle is slowly descended to enable the stirring paddle to fall into the steel grinding tool, the stirring paddle extrudes the refractory repair material in the steel grinding tool on the surface of the stirring tool in the descending process, meanwhile, the refractory repair material is sintered on the surface of the stirring paddle by utilizing the heat of the stirring paddle, the refractory repair material is well sintered on the surface of the stirring paddle, after the refractory repair material is completely sintered, the steel stirring paddle and the KR stirring paddle are directly inserted into iron liquid, the outer layer of the stirring paddle is made of steel, so that the new refractory repair material is protected.
After the new method is used, the surface of the old stirring paddle does not need to be manually coated, the working environment of workers is improved, the surface of the repaired stirring paddle is well formed, meanwhile, the refractory repair material utilizes the heat of the stirring paddle, the refractory repair material is well sintered, and the service life of the stirring paddle is prolonged by 30%. The application range is as follows: the steel plant is provided with a KR desulfurization device, and the method can be used for desulfurization by using the stirring paddle and online repair of the stirring paddle. The application prospect is as follows: the method is simple, the operation environment of the staff is improved, labor and time are saved, the service life of the stirring paddle can be greatly prolonged, and the application prospect is wide.
Detailed Description
A method for repairing a KR stirring paddle comprises the steps of manufacturing a steel grinding tool in advance, enabling the steel grinding tool to be identical to the KR stirring paddle in shape, enabling the top surface of the steel grinding tool to be open, enabling the KR stirring paddle to be directly placed in the steel grinding tool, placing 150Kg of a refractory material repairing material with fluidity in the steel grinding tool, placing the steel grinding tool on a stirring paddle replacing trolley, enabling the stirring paddle to be desulfurized, enabling the stirring paddle replacing trolley to be opened to be right below the stirring paddle, slowly descending the stirring paddle to enable the stirring paddle to fall into the steel grinding tool, enabling the refractory material in the steel grinding tool to be extruded on the surface of the stirring paddle in the descending process of the stirring paddle, sintering the refractory material by utilizing the heat of the stirring paddle, enabling the refractory material repairing material to be well sintered on the surface of the stirring paddle, directly inserting the steel grinding tool and the KR stirring paddle into iron liquid to be desulfurized after the refractory, the outer layer of the stirring paddle is made of steel, so that the new refractory repair material is protected.
Claims (1)
1. A method for repairing KR stirring paddle is characterized in that a steel grinding tool is manufactured in advance, the shape of the steel grinding tool is the same as that of the KR stirring paddle, the top surface of the steel grinding tool is open, the open size of the top surface of the steel grinding tool is suitable for directly placing the KR stirring paddle in the steel grinding tool, 150Kg of refractory repair material with fluidity is placed in the steel grinding tool, the steel grinding tool is placed on a stirring paddle replacing trolley, the stirring paddle is desulfurized, the stirring paddle replacing trolley is opened to be right below the stirring paddle, the stirring paddle is slowly descended to enable the stirring paddle to fall into the steel grinding tool, the stirring paddle extrudes the refractory repair material in the steel grinding tool on the surface of the stirring paddle in the descending process, the refractory repair material is sintered on the surface of the stirring paddle by using the self heat of the stirring paddle, the refractory repair material is well sintered on the surface of the stirring paddle, after the refractory repair material is completely sintered, the steel and the KR stirring paddle are directly inserted into molten iron for desulfurization, the outer layer of the stirring paddle is made of steel, so that the new refractory repair material is protected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911302851.0A CN110962228B (en) | 2019-12-17 | 2019-12-17 | Method for repairing KR stirring paddle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911302851.0A CN110962228B (en) | 2019-12-17 | 2019-12-17 | Method for repairing KR stirring paddle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110962228A CN110962228A (en) | 2020-04-07 |
| CN110962228B true CN110962228B (en) | 2021-03-02 |
Family
ID=70034968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911302851.0A Active CN110962228B (en) | 2019-12-17 | 2019-12-17 | Method for repairing KR stirring paddle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110962228B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112225542B (en) * | 2020-09-30 | 2022-03-22 | 鞍钢股份有限公司 | Method for prolonging service life of KR stirring paddle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300931A (en) * | 2000-11-29 | 2001-06-27 | 宝山钢铁股份有限公司 | Method and apparatus for repairing inner liner of hot iron mixer |
| AU2015255325A1 (en) * | 2008-08-21 | 2015-12-03 | Ampcontrol Pty Ltd | Illumination system |
| CN106365649A (en) * | 2016-08-26 | 2017-02-01 | 浙江长兴强立耐火材料有限公司 | Repairing mix for ladles and using method thereof |
| CN109534829A (en) * | 2017-09-21 | 2019-03-29 | 宝山钢铁股份有限公司 | A kind of KR desulfurization agitating paddle castable and preparation method thereof |
-
2019
- 2019-12-17 CN CN201911302851.0A patent/CN110962228B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300931A (en) * | 2000-11-29 | 2001-06-27 | 宝山钢铁股份有限公司 | Method and apparatus for repairing inner liner of hot iron mixer |
| AU2015255325A1 (en) * | 2008-08-21 | 2015-12-03 | Ampcontrol Pty Ltd | Illumination system |
| CN106365649A (en) * | 2016-08-26 | 2017-02-01 | 浙江长兴强立耐火材料有限公司 | Repairing mix for ladles and using method thereof |
| CN109534829A (en) * | 2017-09-21 | 2019-03-29 | 宝山钢铁股份有限公司 | A kind of KR desulfurization agitating paddle castable and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110962228A (en) | 2020-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104263984B (en) | The preparation method of quasi-continuous net-shaped structure Ti Bw/Ti-6Al-4V compound walking spa-cial system | |
| CN102912051B (en) | Method for exchanging cooling wall of blast furnace taphole online | |
| CN110962228B (en) | Method for repairing KR stirring paddle | |
| CN102173819B (en) | Preparation method of electric vacuum ceramic tube shell | |
| CN102626780A (en) | Biomass fuel forming mold surface powder metallurgy strengthening coating material and process | |
| CN101920312A (en) | Casting method and leveling tool for large multi-blade casting | |
| CN101053899A (en) | Vertical casting and repairing device for large-scale shaft products and using method | |
| CN100431777C (en) | Method for producing rocking-turn disk of motorcar air conditioner through technique of liquid forging | |
| CN101947648B (en) | Method for producing large zirconium and zirconium alloy casting | |
| CN104084747B (en) | A kind of restorative procedure of inner die for cold-drawn process | |
| CN103252627A (en) | Two-layer combined concave mould and machining method thereof | |
| CN105689708A (en) | Production process for HS311 steel-based copper plastic self-lubrication material | |
| CN103937934A (en) | A furnace roller used for an annealing furnace and a preparing method thereof | |
| CN103525438B (en) | A kind of maintenance and renovation method of waste and old fire door knife edge | |
| CN103978175A (en) | Vertical centrifugal casting method for tee | |
| CN109574692A (en) | Silicon carbide fastener and manufacturing process | |
| CN203917851U (en) | A kind of vertical centrifugal casting device for the manufacture of roll neck | |
| CN203917854U (en) | A kind of vertical centrifugal casting device for the preparation of Concentric Reducers | |
| RU2469101C1 (en) | Repair method of vacuumiser branch pipe lining | |
| CN203778764U (en) | Turntable material-distribution device for slitting knife powder metallurgy | |
| CN106555077B (en) | A kind of laser repairing material of pelletizer die | |
| CN205008575U (en) | Take metallic additive special processing equipment of calotte | |
| CN101701602A (en) | Flange shaft sleeve and manufacturing method thereof | |
| CN205008577U (en) | Metallic additive special processing equipment | |
| CN201864768U (en) | Nickel-based intermediate alloy smelting device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |