Steel ladle upper nozzle seating brick capable of improving self-opening rate of steel ladle

Abstract

The utility model relates to the technical field of steel-making ladles, in particular to a ladle upper nozzle seating brick capable of improving the self-opening rate of ladles, which comprises an upper nozzle brick and a seating brick, a molten steel channel and a mounting hole are arranged in the seating brick, the upper end of the upper nozzle brick is inserted into the mounting hole and detachably connected with the mounting hole, and the outer surface of the upper end of the upper nozzle brick is tightly attached to the inner wall of the mounting hole. The upper nozzle brick is internally provided with an upper nozzle, the upper nozzle comprises a conical section and a straight barrel section, and after the upper end part of the upper nozzle brick is inserted into the mounting hole, the section of the molten steel channel and the section of the conical section are combined to form an inverted conical upper nozzle channel. The steel slag residue caused by a small platform on the inner wall of the water gap in the prior art is avoided, so that no drainage sand residue is ensured during water gap opening of a new ladle on-line casting machine, the drainage frequency of the five casting machines before new ladle on-line and water gap heat exchange is greatly reduced, the frequency of degradation judgment of variety steel is reduced, the self-opening rate of a steel ladle is improved, and the service life of the steel ladle is prolonged. And meanwhile, the operation safety of staff is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking ladles, in particular to a ladle upper water inlet seat brick capable of improving the ladle's self-opening rate. Background Art

[0002] As the proportion of high value-added steel smelting in steel mills increases, the requirements for molten steel purity are also getting higher and higher. Continuous casting requires full protection of pouring to reduce or eliminate secondary pollution of molten steel. However, since the molten steel in some furnaces cannot flow automatically from the ladle to the tundish, oxygen needs to be burned for drainage, causing secondary oxidation of the molten steel, which has become the biggest constraint on protective pouring, seriously affecting product quality, and also increasing the labor intensity and safety risks of workers. By reducing the frequency of continuous casting ladle drainage, increasing the self-opening rate of continuous casting ladle, and reducing the risk of secondary pollution of molten steel, the internal quality of the steel billet is improved and the operating risk of workers is reduced.

[0003] At present, 120-ton ladle uses chromium drainage sand with Cr content of more than 30%, which can adapt to most of the steel grades currently produced. When the molten steel in the ladle flows out, the upper water inlet block is needed, such as Figure 1 , discloses a combined structure of an upper nozzle seat brick, including an upper nozzle brick 2 and a seat brick 1, wherein the seat brick 1 is provided with a molten steel channel 11 and a mounting hole 12, wherein the upper end of the upper nozzle brick 2 is inserted into the mounting hole 12 for detachable connection, wherein the outer surface of the upper end of the upper nozzle brick 2 is tightly fitted with the inner wall of the mounting hole 12 to form a combined structure of the upper nozzle brick 2 and the seat brick 1, wherein the nozzle brick 2 is provided with an upper nozzle 21, however, before the ladle is put on line and the ladle nozzle is hot-changed for five heats, such as Figure 1 A small platform of 1.0-2.5cm will be generated at point A in the middle. When the continuous casting operation starts, the drainage sand cannot smoothly guide the molten steel into the tundish through the ladle inlet, forcing the continuous casting machine to perform drainage operation.

[0004] Among them, the inner wall of the nozzle of the new ladle is relatively clean for the first time, without slag accumulation, and drainage and oxygen burning are relatively simple; however, from the second to the fifth time of the new ladle, since the heat absorption of the ladle is still in the rising stage, some slag will remain on the inner wall of the nozzle, which will form a combination of drainage sand and slag after combining with the drainage sand. It is very difficult to burn oxygen and drain (the oxygen gun and non-metallic combination will not ignite), causing the casting machine to slow down, the steel grade to be downgraded, and even cause unplanned shutdown accidents of the casting machine. Utility Model Content

[0005] In view of the technical problem in the prior art that residual slag on the inner wall of the upper water inlet affects drainage, the utility model provides a ladle upper water inlet seat brick for improving the self-opening rate of the ladle, which can significantly reduce the frequency of drainage of the new ladle on-line casting machine, reduce the number of steel grade downgrades and revisions, improve the self-opening rate of the ladle, and also greatly improve the operating safety of employees.

[0006] The technical solution of this utility model is as follows:

[0007] A ladle inlet seat brick for improving the self-opening rate of a ladle comprises an inlet brick and a seat brick, wherein a molten steel channel and a mounting hole are arranged in the seat brick, wherein the upper end of the inlet brick is inserted into the mounting hole for detachable connection, wherein the outer surface of the upper end of the inlet brick is tightly fitted with the inner wall of the mounting hole to form a combined structure of the inlet brick and the seat brick, wherein an inlet is arranged in the inlet brick, wherein the inlet comprises a tapered section and a straight section, wherein after the upper end of the inlet brick is inserted into the mounting hole, the cross section of the molten steel channel and the cross section of the tapered section are combined to form an inverted tapered inlet channel.

[0008] Furthermore, the upper opening of the molten steel channel expands outward to form a conical opening, which serves to expand the opening of the molten steel channel so that the diameter of the upper nozzle seat brick does not expand significantly when the ladle is hot-changing the upper nozzle, thereby increasing the overall life of the upper nozzle seat brick of the ladle.

[0009] Furthermore, the inner diameter of the upper opening of the conical opening is 80 cm.

[0010] Furthermore, the height of the straight tube section is 3 / 5 of the total height of the upper water inlet.

[0011] Furthermore, the height of the straight tube section is 170~180cm.

[0012] Furthermore, the inner diameter of the straight tube section is 60 cm.

[0013] The beneficial effects of the utility model are as follows: the upper water inlet seat brick of the utility model has a combined structure of an upper water inlet brick and a seat brick, and the two are combined to form an inverted cone-shaped upper water inlet channel, which avoids the steel slag residue caused by the small platform on the inner wall of the water inlet in the prior art, and then the molten steel flows out in the straight cylinder section, ensuring that there is no drainage sand residue when the water inlet of the new ladle is opened, greatly reducing the drainage frequency of the five furnace casting machines before the new ladle is put into operation and the water inlet is hot-changed, reducing the frequency of downgrading and re-judgment of steel varieties, improving the self-opening rate of the ladle, and also ensuring the safety of employee operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a cross-sectional view of the upper water inlet seat brick in the background technology of the utility model.

[0016] Figure 2 It is a cross-sectional view of the upper water inlet brick in a specific implementation manner of the utility model.

[0017] Figure 3 It is a cross-sectional view of the upper water inlet seat brick in a specific implementation manner of the utility model.

[0018] In the figure, 1-seat brick, 11-water channel, 111-conical opening, 12-mounting hole, 2-upper water inlet brick, 21-upper water inlet, 211-conical section, 212-straight section, 3-upper water inlet channel. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Example 1

[0021] Combination Figure 2 , Figure 3 The utility model provides a ladle upper nozzle seat brick for improving the self-opening rate of the ladle, including an upper nozzle brick 2 and a seat brick 1, wherein the seat brick 1 is provided with a molten steel channel 11 and a mounting hole 12, wherein the upper end portion of the upper nozzle brick 2 is inserted into the mounting hole 12 for detachable connection, wherein the outer surface of the upper end portion of the upper nozzle brick 2 is tightly fitted with the inner wall of the mounting hole 12 to form a combined structure of the upper nozzle brick 2 and the seat brick 1, wherein the upper nozzle brick 2 is provided with an upper nozzle 21, wherein the upper nozzle 21 includes a tapered section 211 and a straight section 212, wherein after the upper end portion of the upper nozzle brick 2 is inserted into the mounting hole 12, the cross section of the molten steel channel 11 and the cross section of the tapered section 211 are combined to form an inverted tapered upper nozzle channel 3.

[0022] The utility model enlarges the opening of the molten steel channel 11, specifically, expands the upper end opening of the molten steel channel 11 outward to form a tapered opening 111, so that the diameter expansion of the nozzle seat brick is not obvious when the ladle is hot-changed on the nozzle, thereby improving the overall life of the ladle nozzle seat brick.

[0023] The specific size design of the water inlet seat brick provided by the utility model is as follows: the inner diameter of the upper opening of the conical opening 111 is 80 cm. The height of the straight section 212 is 3 / 5 of the total height of the water inlet 21, and the height of the straight section 212 is 170-180 cm. The inner diameter of the straight section 212 is 60 cm.

[0024] The utility model provides a ladle water inlet seat brick with a combined structure of a water inlet brick 2 and a seat brick 1. The two are combined to form an inverted cone-shaped water inlet channel 3, which avoids the steel slag residue caused by the small platform on the inner wall of the water inlet in the prior art. Then the molten steel flows out in the straight tube section 212, ensuring that there is no drainage sand residue when the water inlet of the new ladle is opened. This greatly reduces the drainage frequency of the five furnace casting machines before the new ladle is put into operation and the water inlet is hot-swapped, reduces the frequency of downgrading and re-judgment of steel varieties, improves the self-opening rate of the ladle, and also ensures the safety of employee operation.

[0025] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A ladle inlet seat brick for improving the ladle self-opening rate, comprising an inlet brick and a seat brick, wherein a molten steel channel and a mounting hole are arranged in the seat brick, wherein the upper end of the inlet brick is inserted into the mounting hole and can be detachably connected, wherein the outer surface of the upper end of the inlet brick is tightly fitted with the inner wall of the mounting hole to form a combined structure of the inlet brick and the seat brick, wherein an inlet is arranged in the inlet brick, wherein the inlet is characterized in that: The water inlet includes a tapered section and a straight section. After the upper end of the water inlet brick is inserted into the mounting hole, the cross section of the molten steel channel and the cross section of the tapered section are combined to form an inverted tapered water inlet channel.

2. The ladle upper nozzle seat brick for improving the ladle self-opening rate according to claim 1, characterized in that: The opening at the upper end of the molten steel channel expands outward to form a tapered opening.

3. The ladle upper nozzle seat brick for improving the ladle self-opening rate according to claim 2, characterized in that: The inner diameter of the upper opening of the conical opening is 80 cm.

4. The ladle upper nozzle seat brick for improving the ladle self-opening rate according to claim 1, characterized in that: The height of the straight tube section is 3 / 5 of the total height of the upper water inlet.

5. The ladle upper nozzle seat brick for improving the ladle self-opening rate according to claim 4, characterized in that: The height of the straight section is 170~180cm.

6. The ladle upper nozzle seat brick for improving the ladle self-opening rate according to claim 1, characterized in that: The inner diameter of the straight section is 60 cm.

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