CN110640132B - Repairing method of tundish steel receiving opening lining and special brick - Google Patents
Repairing method of tundish steel receiving opening lining and special brick Download PDFInfo
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- CN110640132B CN110640132B CN201910578506.3A CN201910578506A CN110640132B CN 110640132 B CN110640132 B CN 110640132B CN 201910578506 A CN201910578506 A CN 201910578506A CN 110640132 B CN110640132 B CN 110640132B
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- receiving opening
- steel receiving
- convex
- brick
- tundish
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a method for repairing a steel receiving port of a tundish, which comprises the following steps: firstly, cleaning up foreign matters on the surface of a permanent layer of a steel receiving opening of a tundish, then smearing a smearing material with the thickness of 2-3cm on the side wall of the steel receiving opening, then tightly attaching a convex brick to the bottom surface of the side wall of the steel receiving opening, then tightly attaching two F-shaped bricks to two sides of the side wall of the steel receiving opening, connecting the convex part of the F-shaped brick with the gap of the convex brick, filling the gap with a magnesium smearing material, and tightly knocking the bricks by using a rubber hammer. The invention adopts the high-strength combined refractory bricks to replace the traditional magnesium dry material and coating material, so that the tundish has more excellent molten steel scouring resistance and erosion resistance, the whole construction process is very quick and simple, maintenance and baking are not needed, only 15-20 minutes are needed for assembling an online tundish steel receiving port, and 40-50 minutes are needed for construction by adopting the magnesium dry material or coating material, thereby improving the turnover efficiency of the tundish.
Description
Technical Field
The technical field is as follows:
the invention relates to a method for repairing an inner lining of a steel receiving opening of a tundish for steelmaking and a special brick.
Secondly, background art:
the traditional steel receiving opening of the tundish mostly adopts a magnesium dry material or a magnesium coating material as a lining refractory material, the magnesium dry material or the magnesium coating material is constructed on a steelmaking site, and the service performance of the material is difficult to keep consistency; and sufficient maintenance time and baking time are required after construction, and collapse or burst is easy to occur when the building is quickly dried and baked; meanwhile, the magnesium dry material or magnesium coating material has small volume density, low strength and weak molten steel scouring resistance and slag erosion resistance, seriously restricts the service life of the tundish and restricts the turnover efficiency of the tundish. Especially when partial steel is smelted, such as 1215 steel grade, the number of continuous casting furnaces is greatly lower.
Thirdly, the invention content:
aiming at the problems, the invention provides a method for repairing a lining of a steel receiving port of a tundish and a special brick, so that the tundish has the characteristics of high strength, good molten steel scouring resistance and strong slag erosion resistance, the on-site construction is convenient and quick, the maintenance and the baking are not needed, and the turnover efficiency of the tundish is improved.
In order to solve the problems, the invention adopts the technical scheme that: in order to ensure that maintenance and baking are not needed after the tundish is repaired by the steel receiving opening, the repairing method adopts special refractory bricks, the refractory bricks comprise a set of three refractory bricks, including a convex brick and two F-shaped bricks, the front surface of the convex brick is shown in figure 1 and is formed by two inverted trapezoids with one big end and one small end, the top surface of the convex brick is a trapezoid which is shown in figure 2, and the included angle of the top surface of the convex brick is consistent with the included angle of the bottom edge and the side edge of the steel receiving opening; the front surface of the F-shaped brick is shown in figure 3 and is formed into two parallelograms with one large and the other small, a convex part is formed at the upper part of the brick, and the size of the convex part corresponds to the thickness of the convex brick; the convex part of the F-shaped brick is connected with the notch of the convex brick, the shape of the combined three bricks is shown in figure 4, and the shape and the size of the combined three bricks correspond to those of the steel receiving opening.
A method for repairing a steel receiving opening lining of a tundish comprises the following steps:
firstly, cleaning up foreign matters on the surface of a permanent steel receiving opening layer of a tundish, adding 10-12% of water into a magnesium coating material, stirring into a slurry shape (the magnesium coating material is a common magnesium coating material for the tundish, the content of magnesium oxide and the content of aluminum oxide are more than 80% in percentage by weight), uniformly coating the surface of the permanent steel receiving opening layer with a thickness of 2-3cm, tightly attaching the convex bricks to the front side of the side wall of the steel receiving opening, tightly attaching two F-shaped bricks to two sides of the side wall of the steel receiving opening, connecting the convex parts of the F-shaped bricks with gaps of the convex bricks, filling gaps with the magnesium coating material, and tightly knocking the bricks with an eraser hammer. The whole construction process is quick and simple.
The invention has the following positive beneficial effects: the invention adopts the high-strength combined refractory bricks to replace the traditional magnesium dry material and the coating material, so that the tundish has more excellent molten steel scouring resistance and erosion resistance, the magnesium coating material with the thickness of 2-3cm is coated on the side wall of the steel receiving opening during construction, then the high-strength refractory bricks are flatly attached on the coating material and are struck tightly by a rubber hammer, the whole construction process is quick and simple, maintenance is not needed, and the construction process can be quickly baked, the steel receiving opening of the online tundish is assembled only for 15-20 minutes, and the magnesium dry material or the coating material is adopted for construction, the time is 40-50 minutes, so that the turnover efficiency of the tundish is improved.
Description of the drawings
FIG. 1: the positive view of the convex firebrick.
FIG. 2: top view of convex refractory brick
FIG. 3: f-shaped refractory brick front view.
FIG. 4: and (5) a firebrick combination installation schematic diagram.
In the figure: 1-convex brick, 2-F brick, 3-permanent layer, 4-magnesium coating and 5-steel receiving opening.
The fifth embodiment is as follows:
the invention is in order to guarantee that the tundish does not need to be maintained and baked after being repaired by the steel notch, the repairing method comprises a set of special refractory bricks, the refractory bricks comprise three convex bricks 1 and two F-shaped bricks 2, the front surface of each convex brick 1 is shown in figure 1 and is formed by two inverted trapezoids with one smaller end and one larger end, the top surface of each convex brick 1 is also in a trapezoid shape as shown in figure 2, and the included angle of the top surface of each convex brick 1 is consistent with the included angle of the bottom edge and the side edge of the steel notch; the front surface of the F-shaped brick 2 is shown in figure 3 and is formed into two parallelograms with a big end and a small end, a convex part is formed at the upper part of the brick, and the size of the convex part corresponds to the thickness of the convex brick 1; the convex part of the F-shaped brick 2 is connected with the notch of the convex-shaped brick 1, the shape of the combined three bricks is shown in figure 4, and the shape and the size of the combined three bricks correspond to the shape and the size of the steel receiving opening 5.
A method for repairing a steel receiving opening lining of a tundish comprises the following steps: firstly, cleaning foreign matters on the surface of a permanent layer 3 of a steel receiving opening 5 of a tundish, adding 10-12% of water into a magnesium coating material 4, stirring into a slurry shape (the magnesium coating material 4 is the magnesium coating material commonly used for the tundish, the content of magnesium oxide and the content of aluminum oxide are more than 80% by weight percent), coating 2-3cm thick on the side wall of the steel receiving opening, tightly attaching a convex brick 1 to the front surface of the side wall of the steel receiving opening, tightly attaching two F-shaped bricks 2 to two sides of the side wall of the steel receiving opening, connecting the convex part of the F-shaped brick 2 with the notch of the convex brick 1, filling the gap with the magnesium coating material, and striking the bricks tightly by using a rubber hammer. The whole construction process is quick and simple.
Claims (1)
1. A method for repairing a steel receiving opening of a tundish comprises the following steps: firstly, cleaning up foreign matters on the surface of a permanent layer of a steel receiving opening of a tundish, then smearing magnesium coating materials with the thickness of 2-3cm on the side wall of the steel receiving opening, tightly attaching the convex bricks to the bottom surface of the steel receiving opening wall, tightly attaching two F-shaped bricks to two sides of the steel receiving opening wall, connecting the convex parts of the F-shaped bricks with the gaps of the convex bricks, filling the gaps with the magnesium coating materials, and finally, tightly knocking with a rubber hammer; the front surface of the convex brick is composed of two inverted trapezoids which are one small and one large, the top surface of the convex brick is trapezoidal, and the included angle of the top surface of the convex brick is consistent with the included angle of the bottom edge and the side edge of the steel receiving opening; the front surface of the F-shaped brick consists of two parallelograms with a big side and a small side, a convex part is formed on the upper part of the brick, and the thickness of the convex part corresponds to that of the convex brick; the convex part of the F-shaped brick is connected with the notch of the convex brick, and the shape and the size of the combined three bricks correspond to the shape and the size of the steel receiving opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578506.3A CN110640132B (en) | 2019-06-28 | 2019-06-28 | Repairing method of tundish steel receiving opening lining and special brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578506.3A CN110640132B (en) | 2019-06-28 | 2019-06-28 | Repairing method of tundish steel receiving opening lining and special brick |
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| Publication Number | Publication Date |
|---|---|
| CN110640132A CN110640132A (en) | 2020-01-03 |
| CN110640132B true CN110640132B (en) | 2021-06-25 |
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| CN201910578506.3A Active CN110640132B (en) | 2019-06-28 | 2019-06-28 | Repairing method of tundish steel receiving opening lining and special brick |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862028A (en) * | 2014-03-14 | 2014-06-18 | 莱芜钢铁集团有限公司 | Breathable upper pocket block of continuously-cast intermediate ladle and installation method thereof |
| CN203944831U (en) * | 2014-06-20 | 2014-11-19 | 武汉钢铁(集团)公司 | Novel anti-leakage ladle lining |
| JP3197534U (en) * | 2015-03-04 | 2015-05-21 | 東京窯業株式会社 | Hot water receiving member, tilting rod and slag bucket |
| CN108031829A (en) * | 2017-12-13 | 2018-05-15 | 钢城集团凉山瑞海实业有限公司 | Hot ladle pocket block repairing mould and restorative procedure |
| CN207865446U (en) * | 2018-01-22 | 2018-09-14 | 宜兴瑞泰耐火材料有限公司 | A kind of waste incinerator Si3N4-SiC bricks |
| CN208853697U (en) * | 2018-09-21 | 2019-05-14 | 上海宝明耐火材料有限公司 | Ladle |
-
2019
- 2019-06-28 CN CN201910578506.3A patent/CN110640132B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862028A (en) * | 2014-03-14 | 2014-06-18 | 莱芜钢铁集团有限公司 | Breathable upper pocket block of continuously-cast intermediate ladle and installation method thereof |
| CN203944831U (en) * | 2014-06-20 | 2014-11-19 | 武汉钢铁(集团)公司 | Novel anti-leakage ladle lining |
| JP3197534U (en) * | 2015-03-04 | 2015-05-21 | 東京窯業株式会社 | Hot water receiving member, tilting rod and slag bucket |
| CN108031829A (en) * | 2017-12-13 | 2018-05-15 | 钢城集团凉山瑞海实业有限公司 | Hot ladle pocket block repairing mould and restorative procedure |
| CN207865446U (en) * | 2018-01-22 | 2018-09-14 | 宜兴瑞泰耐火材料有限公司 | A kind of waste incinerator Si3N4-SiC bricks |
| CN208853697U (en) * | 2018-09-21 | 2019-05-14 | 上海宝明耐火材料有限公司 | Ladle |
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|---|---|
| CN110640132A (en) | 2020-01-03 |
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