Easily detachable graphite riser for casting fused brick

Abstract

The utility model relates to the field of fused zirconia corundum refractory materials, and discloses an easy-to-disassemble fused brick casting graphite riser which comprises a riser body, the periphery of the riser body is sleeved with a heat preservation layer, the middle of the heat preservation layer is provided with a first groove, the middle of the riser body is provided with a second groove, and the first groove is provided with a first through hole. An air hole is formed in the middle of the riser body, the heat preservation layer is made of calcium silicate, the first groove is communicated with the second groove, one end of the air hole is located at the upper opening of the riser body, and the other end of the air hole is located below the corner of the riser body. In the utility model, after the fused brick is solidified, the groove II is cut at the root part of the riser body, so that the root part of the riser body is more easily stressed, when the riser body is cut or knocked, the joint is more easily separated from a grinding tool and the fused brick, and meanwhile, the heat loss of molten materials is reduced under the action of the thermal insulation layer; and adhesion and solidification of molten materials in the riser body are ensured.

Description

Technical Field

[0001] This utility model relates to the field of fused zirconia-corundum refractory materials, and in particular to an easily disassembled fused brick casting graphite riser. Background Technology

[0002] Zirconium-alumina electrofused bricks are made from high-quality zirconium sand imported from Australia, domestic alumina powder, and trace amounts of soda ash. After mixing, the mixture is added to an electric arc furnace and melted at a high temperature of over 2000℃. Finally, it is formed by oxygen blowing, refining, and casting into sand molds. Zirconium-alumina electrofused bricks are made with zirconium content adjusted to 33%, 36%, and 41%. In order to ensure the process and casting quality of zirconium-alumina electrofused bricks and reduce shrinkage cavities and porosity defects, graphite risers are usually used to shrink the volume of the molten material, thereby reducing shrinkage cavities and porosity. In addition, graphite has excellent thermal conductivity, which can guide the solidification sequence of the casting and avoid thermal stress cracks caused by uneven cooling.

[0003] To quickly remove castings, existing graphite risers typically use hammers or vibrators to strike the riser root, causing it to detach naturally. However, during the casting process, molten material is guided into the mold along the riser's inner wall, causing some of the molten material to solidify with the riser root and inner wall, increasing the difficulty of riser disassembly. To address this issue, an easily disassembled electrofused brick casting graphite riser is proposed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an easily disassembled electrofused brick cast graphite riser, aiming to improve the problem in the prior art where some molten material solidifies on the inner wall and root of the riser, making the riser difficult to disassemble.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An easily detachable electrofused brick casting graphite riser includes a riser body, an insulation layer is provided around the outer periphery of the riser body, a first groove is provided in the middle of the insulation layer, and a second groove is provided in the middle of the riser body.

[0007] As a further description of the above technical solution:

[0008] The riser body has an air hole in the middle;

[0009] As a further description of the above technical solution:

[0010] The insulation layer is made of calcium silicate.

[0011] As a further description of the above technical solution:

[0012] The first groove and the second groove are connected;

[0013] As a further description of the above technical solution:

[0014] One end of the vent is located at the upper opening of the riser body, and the other end of the vent is located below the corner of the riser body;

[0015] As a further description of the above technical solution:

[0016] The first groove and the second groove are the same size.

[0017] This utility model has the following beneficial effects:

[0018] In this invention, after the electrofused brick solidifies, the root of the riser body is cut with a groove, which makes the root of the riser body more susceptible to stress. When the riser body is cut or struck, the connection is more likely to separate from the mold and the electrofused brick. At the same time, the heat loss of the molten material is reduced under the action of the insulation layer, ensuring that the molten material adheres and solidifies in the riser body. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of an easily disassembled electrofused brick casting graphite riser proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the pore structure of an easily disassembled electrofused brick casting graphite riser proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the insulation layer of an easily removable electrofused brick cast graphite riser proposed in this utility model.

[0022] Legend:

[0023] 1. Riser body; 2. Groove one; 3. Groove two; 4. Air pores; 5. Insulation layer. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Reference Figures 1-3One embodiment of this utility model is a removable electrofused brick cast graphite riser, comprising a riser body 1, an insulation layer 5 surrounding the riser body 1, a groove 2 in the middle of the insulation layer 5, a groove 3 in the middle of the riser body 1, and a vent 4 in the middle of the riser body 1. The insulation layer 5 is made of calcium silicate. Grooves 2 and 3 are connected. One end of the vent 4 is located at the upper opening of the riser body 1, and the other end of the vent 4 is located below the corner of the riser body 1. Grooves 2 and 3 are the same size. During the pouring process, if the molten material is poured in too quickly through the vent 4, the gas at the corner of the riser body 1 can be squeezed out through the vent 4, avoiding the formation of air cavities and blockage, ensuring the speed at which the molten material flows into the mold, thus ensuring that the molten material does not accumulate and solidify in the riser body 1. At the same time, when the molten material flows in through the inner wall of the riser body 1, since the melting point of the calcium silicate insulation layer 5 is much higher than the temperature of the molten material, and the thermal conductivity of calcium silicate is extremely poor, it can greatly reduce the loss of temperature of the molten material, thereby slowing down the solidification speed and reducing the adhesion and solidification of the molten material on the inner wall, so as to weaken the connection between the riser body 1 and the solidified electrofused brick. After the electrofused brick solidifies, since the root of the riser body 1 and the insulation layer 5 is cut with groove 2 3, the root of the riser body 1 is more likely to bear force. When the riser body 1 is cut or hit, the connection is easier to separate from the mold and the electrofused brick. And when separation is difficult, a chisel can be inserted into the groove 2 3 and the chisel can be used to directly lift the riser body 1.

[0026] Working principle: The heat loss of the molten material is reduced by the insulation layer 5, so that the molten material has enough time to flow into the module from the inner wall of the riser body 1, which slows down the solidification speed and reduces the adhesion of the molten material to the inner wall. After the electrofused brick solidifies, the root of the riser body 1 is cut with a groove 3, which makes the root of the riser body 1 more susceptible to stress. When the riser body 1 is cut or hit, the connection is easier to separate from the mold and the electrofused brick.

Claims

1. An easily removable electrofused brick cast graphite riser, comprising a riser body (1), characterized in that: The riser body (1) is covered with an insulation layer (5) on its outer periphery. The insulation layer (5) has a groove 1 (2) in the middle and a groove 2 (3) in the middle.

2. The easily removable electrofused brick casting graphite riser according to claim 1, characterized in that: The riser body (1) has an air hole (4) in the middle.

3. The easily removable electrofused brick casting graphite riser according to claim 1, characterized in that: The insulation layer (5) is made of calcium silicate.

4. The easily removable electrofused brick casting graphite riser according to claim 1, characterized in that: The first groove (2) and the second groove (3) are connected.

5. The easily removable electrofused brick casting graphite riser according to claim 2, characterized in that: One end of the vent (4) is located at the upper opening of the riser body (1), and the other end of the vent (4) is located below the corner of the riser body (1).

6. The easily removable electrofused brick casting graphite riser according to claim 1, characterized in that: The first groove (2) and the second groove (3) have the same dimensions.

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