Insulated riser brick device for ingot casting

Abstract

The utility model belongs to the technical field of steel metallurgy steelmaking ingot casting, and particularly relates to a heat preservation riser brick device for ingot casting, which comprises a riser brick, a steel sleeve is covered on the outer side of the riser brick, a plurality of anchoring nails are fixedly connected with the inner wall of the steel sleeve, a heat preservation cotton sleeve is arranged on the outer side wall of the riser brick, and the distance between the upper edge of the heat preservation cotton sleeve and the upper edge of the riser brick is 20-30mm. The distance between the lower edge of the heat preservation cotton sleeve and the lower edge of the riser brick is 30-40 mm, the upper edge of the steel sleeve is 30-60 mm higher than the upper edge of the riser brick, the lower edge of the steel sleeve is flush with the lower edge of the riser brick, and refractory materials are poured in the space between the steel sleeve and the outer wall of the riser brick. And heat preservation cotton cushion layers are arranged on the surfaces of the lower edges of the steel sleeve and the riser brick. The riser brick has the advantages that the overall strength is good, bleed-out of the bottom of the riser brick can be effectively prevented, the riser brick is not prone to falling off from the steel sleeve, meanwhile, the phenomenon of bleed-out caused by cracking of the periphery of the riser brick is completely eradicated, and the service life is prolonged by more than five times of the original service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel metallurgy steelmaking ingot casting, in particular to a heat-insulating riser brick device for ingot casting. Background Art

[0002] During the solidification process, the steel ingot will shrink in volume, and shrinkage cavities and shrinkage will occur in the area where the molten steel solidifies last. In order to improve the quality of the steel ingot and ensure that the ingot body is free of defects, a riser needs to be set on the upper part of the ingot to replenish the molten steel lost due to the shrinkage of the steel ingot. In order to ensure that the riser can fully complete the shrinkage compensation task, it is necessary to use insulation bricks at the riser to extend the solidification time of the molten steel. It is also possible to use a heating riser or add an insulation agent or heating agent to the upper part of the riser after pouring to achieve the final solidification of the molten steel at the riser and achieve the purpose of normal shrinkage compensation. Riser bricks, as a device for forming the riser of ingots, are widely used in the smelting process of induction furnaces. However, when using a vacuum induction furnace to smelt ingots, since the entire metallurgical process is carried out in a vacuum furnace body with negative pressure, it is not appropriate to use a heating riser or add an insulation agent after pouring.

[0003] The Chinese utility model patent with the announcement number CN221336513U discloses a top-casting type heat-insulating riser, including: a heat-insulating riser inner wall 1; a heat-insulating riser outer layer 1 is fixedly connected to one end of the outer wall of the heat-insulating riser inner wall 1, an outer thread is provided at one end of the outer wall of the heat-insulating riser outer layer 1, a connecting sleeve is provided at one end of the outer wall of the heat-insulating riser outer layer 2, a heat-insulating riser outer layer 2 inner wall is fixedly connected to the heat-insulating riser inner wall 2, and an inner thread is provided at the other end of the inner wall of the connecting sleeve. It is convenient to fix or disassemble the heat-insulating riser inner wall 1, the heat-insulating riser outer layer 1, the heat-insulating riser outer layer 2 and the heat-insulating riser inner wall 2. Disassembly after the pouring operation is completed can prevent the subsequent inspection or maintenance work from causing limited visibility and avoid certain impacts.

[0004] The riser bricks currently in use have defects such as easy edge leakage, cracking, poor thermal insulation effect, and short service life, which hinder the high-quality, efficient, and low-cost operation of the steelmaking process. Utility Model Content

[0005] The utility model aims to provide an insulating riser brick device for ingot casting, overcomes the shortcomings of the prior art, solves the problems of steel leakage, cracking, poor insulation effect and other defects of the riser brick edge, improves the overall strength, prolongs the service life of the insulating riser brick, and reduces the manufacturing cost.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A heat-insulating riser brick device for ingot casting comprises a riser brick, a steel sleeve is provided on the outer side of the riser brick, a plurality of anchor nails are fixedly connected to the inner wall of the steel sleeve, a heat-insulating cotton sleeve is provided on the outer side wall of the riser brick, the upper edge of the heat-insulating cotton sleeve is 20-30 mm away from the upper edge of the riser brick, the lower edge of the heat-insulating cotton sleeve is 30-40 mm away from the lower edge of the riser brick, the upper edge of the steel sleeve is 30-60 mm higher than the upper edge of the riser brick, the lower edge of the steel sleeve is flush with the lower edge of the riser brick, refractory material is poured in the space between the steel sleeve and the outer wall of the riser brick; a heat-insulating cotton cushion layer is provided on the surface of the lower edge of the steel sleeve and the riser brick.

[0008] Furthermore, the anchor nail is an I-shaped, X-shaped or Y-shaped steel bar.

[0009] Furthermore, the thickness of the thermal insulation cotton cover is 10-20 mm.

[0010] Furthermore, the thickness of the thermal insulation cotton pad is 5-10 mm.

[0011] Furthermore, at least one of the thermal insulation wool cover and the thermal insulation wool cushion layer is made of asbestos or rock wool.

[0012] Furthermore, the thermal insulation cotton sleeve and the outer wall of the riser brick, and the thermal insulation cotton cushion layer and the riser brick and the refractory material are connected through an adhesive layer.

[0013] Furthermore, the steel sleeve is provided with a lifting lug outside.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) The device plays a role in forming the riser of the ingot during the casting of cast steel. It has good overall strength and can effectively prevent the steel from leaking out from the bottom of the riser brick. The riser brick is not easy to fall off from the steel sleeve. At the same time, it prevents the cracking around the riser brick, which leads to steel leakage. The service life can be increased to more than 5 times the original;

[0016] 2) The thermal insulation effect of the riser bricks is improved, the manufacturing process of the device is simple, the cost is low, and the production cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model.

[0018] In the figure: 1-steel sleeve, 2-refractory material, 3-anchor nail, 4-insulation cotton sleeve, 5-lifting ear, 6-riser brick, 7-insulation cotton cushion layer. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0021] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0022] See Figure 1 , is a schematic diagram of the structure of an embodiment of the utility model of an insulation riser brick device for ingot casting, comprising a riser brick 6, a steel sleeve 1 is provided on the outer side of the riser brick 6, a plurality of anchor nails 3 are fixedly connected to the inner wall of the steel sleeve 1, and the anchor nails 3 are evenly distributed. An insulation cotton sleeve 4 is provided on the outer side wall of the riser brick 6, and the upper edge of the insulation cotton sleeve 4 is 20-30mm away from the upper edge of the riser brick 6, and the lower edge of the insulation cotton sleeve 4 is 30-40mm away from the lower edge of the riser brick 6. The upper edge of the steel sleeve 1 is 30-60mm higher than the upper edge of the riser brick 6. 0mm, the lower edge of the steel sleeve 1 is flush with the lower edge of the riser brick 6, and the space between the steel sleeve 1 and the outer wall of the riser brick 6 is poured with refractory 2, which is a mixture of magnesia and a binder. The refractory 2 wraps the anchor nails 3 to ensure its own strength and prevent it from falling off and separating from the steel sleeve 1; the lower edge surface of the steel sleeve 1 and the riser brick 6 is provided with an insulation cotton pad 7, which is located at the bottom of the entire device, and can fill the gap between the insulation riser brick and the upper side of the ingot mold to prevent steel leakage from the bottom.

[0023] The anchor nail 3 can be an I-shaped, X-shaped or Y-shaped steel bar. The thickness of the insulation wool sleeve 4 is 10-20mm. The thickness of the insulation wool pad 7 is 5-10mm. At least one of the insulation wool sleeve 4 and the insulation wool pad 7 is made of asbestos or rock wool. The insulation wool sleeve 4 and the outer wall of the riser brick 6, and the insulation wool pad 7 and the riser brick 6 and the refractory material 2 are connected by an adhesive layer to prevent falling off and shifting. The steel sleeve 1 is provided with a lifting lug 5, which serves to transport the entire device.

[0024] When the embodiment of the utility model is manufactured, a riser brick 6 is placed according to the size and position of the steel ingot mold, and a heat-insulating cotton sleeve 4 is placed outside the riser brick 6. Then, a mixed refractory material 2 (generally magnesia and sodium silicate) is filled between the steel sleeve 1 and the riser brick 6. The refractory material needs to be dried in a drying box at 400°C for more than 2 hours.

[0025] After the device is completed, it is placed directly above the ingot mold and aligned with the center of the ingot mold. When pouring molten steel, the molten steel level exceeds the top of the ingot mold and enters the riser brick. Compared with the cast iron material of the ingot mold, the refractory brick cools down slowly, and due to the presence of the insulation cotton sleeve 4 and the insulation cotton pad 7, it can play a further insulation role. The steel sleeve improves the overall strength and prevents the riser brick from cracking, which avoids the phenomenon of steel leakage and greatly improves the service life of the insulation riser brick.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat-insulating riser brick device for ingot casting, comprising a riser brick, characterized in that: A steel sleeve is provided on the outer side cover of the riser brick, a plurality of anchor nails are fixedly connected to the inner wall of the steel sleeve, a thermal insulation cotton sleeve is provided on the outer side wall of the riser brick, the upper edge of the thermal insulation cotton sleeve is 20-30 mm away from the upper edge of the riser brick, the lower edge of the thermal insulation cotton sleeve is 30-40 mm away from the lower edge of the riser brick, the upper edge of the steel sleeve is 30-60 mm higher than the upper edge of the riser brick, the lower edge of the steel sleeve is flush with the lower edge of the riser brick, and refractory material is poured in the space between the steel sleeve and the outer wall of the riser brick; a thermal insulation cotton cushion layer is provided on the lower edge surface of the steel sleeve and the riser brick.

2. The heat-insulating riser brick device for ingot casting according to claim 1, characterized in that: The anchor nail is an I-shaped, X-shaped or Y-shaped steel bar member.

3. The heat-insulating riser brick device for ingot casting according to claim 1, characterized in that: The thickness of the thermal insulation cotton cover is 10-20 mm.

4. The heat-insulating riser brick device for ingot casting according to claim 1, characterized in that: The thickness of the thermal insulation cotton pad is 5-10mm.

5. The heat-insulating riser brick device for ingot casting according to claim 1, characterized in that: At least one of the thermal insulation wool sleeve and the thermal insulation wool cushion layer is made of asbestos or rock wool.

6. The device for insulating riser bricks for ingot casting according to claim 1, characterized in that: The heat-insulating cotton sleeve and the outer wall of the riser brick, and the heat-insulating cotton cushion layer and the riser brick and the refractory material are connected through an adhesive layer.

7. The heat-insulating riser brick device for ingot casting according to claim 1, characterized in that: The steel sleeve is provided with lifting ears outside.

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