Graphite riser for casting fused bricks

Abstract

The utility model relates to a graphite riser for casting an electrically-fused brick, which can effectively solve the problems of riser cost control and production efficiency improvement in the casting process of the electrically-fused brick and comprises a riser main body, the riser main body is of a hollow structure with an upper opening and a lower opening, and the upper opening serves as a casting opening of electrically-fused brick feed liquid. The lower opening is communicated with an upper opening of a brick body sand mold of the electrically-fused brick, the whole body of the riser main body is made of a graphite material, an original sand mold riser is replaced by changing the material of the riser main body, and the riser is resistant to high temperature and corrosion and can be repeatedly used, so that the overall cost is greatly reduced, meanwhile, the generation of solid wastes is also reduced, and the pollution to the environment is reduced; meanwhile, the riser part of the graphite riser cannot be adhered to the inner surface of the graphite riser at a high temperature, sand cleaning operation is not needed, the sand cleaning cost is reduced, a riser casting can be directly crushed and returned to a furnace for use, and product impurities are reduced; and a sand mold riser is not used, so that the use and waste of quartz sand are reduced, and the burden on the environment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrofused brick casting technology, and in particular to a graphite riser for electrofused brick casting. Background Technology

[0002] The production of fused cast zirconia corundum products involves pouring molten material from an electric furnace into a sand mold, cooling and solidifying it to form the product. For high-density, non-shrinkage-cavity cast products, a feeding riser with a certain proportion to the size of the brick needs to be set on the upper part of the brick to ensure that the molten material in the riser is replenished into the brick body that has shrinkage due to cooling and contraction.

[0003] Currently, the industry widely uses risers made of quartz sand, which have the advantages of low cost and ease of molding. However, quartz sand risers have the following problems:

[0004] 1. Single use: Quartz sand risers become solid waste after each use, requiring subsequent treatment, which increases the cost of solid waste treatment and the environmental burden.

[0005] 2. Waste of resources: Because quartz sand risers cannot be reused, there is a serious waste of materials.

[0006] 3. Environmental pollution: The disposal of waste from quartz sand risers may cause environmental pollution, especially when the quartz sand contains other chemicals.

[0007] 4. Difficulty in cleaning sand: Quartz sand will stick to the surface of the riser after being exposed to high temperature, making it difficult to clean the riser casting. The use of risers that are not cleaned properly will also affect the product quality.

[0008] How to improve this situation has always been a difficult issue for the industry to overcome. Summary of the Invention

[0009] In view of the above situation and to overcome the defects of the existing technology, the purpose of this utility model is to provide a graphite riser for electrofused brick casting, which can effectively solve the problems of riser cost control and production efficiency improvement in the electrofused brick casting process.

[0010] The technical solution provided by this utility model is a graphite riser for casting electrofused bricks, comprising a riser body, the riser body being a hollow structure with openings at the top and bottom, the upper opening serving as the casting port for the electrofused brick molten material, and the lower opening being connected to the upper opening of the sand mold of the electrofused brick body, the riser body being made entirely of graphite material.

[0011] This invention replaces the original sand mold riser by changing the material of the riser body. It is more resistant to high temperatures and corrosion, can be reused multiple times, and significantly reduces the overall cost. It also reduces the generation of solid waste and environmental pollution. At the same time, the graphite riser part will not stick to the inner surface of the graphite riser at high temperatures, eliminating the need for sand cleaning and reducing the cost of sand cleaning. The riser casting can be directly crushed and recycled, reducing product impurities. By eliminating the use of sand mold risers, the use and waste of quartz sand are reduced, thus reducing the burden on the environment. It conforms to the concept of green manufacturing, is easy to use, has good results, and has good social and economic benefits. Attached Figure Description

[0012] Figure 1 , 2 These are front views of two embodiments of this utility model.

[0013] Figure 3 , 4 These are cross-sectional views of two embodiments of this utility model.

[0014] Figure 5 , 6 These are top views of two embodiments of the present invention.

[0015] Figure 7 , 8 These are usage diagrams for two embodiments of this utility model. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] Depend on Figure 1-8 As shown, this utility model includes a riser body 1, which is a hollow structure with openings at the top and bottom. Its upper opening 4 serves as the casting port for the molten material of the electrofused brick, and its lower opening 3 is connected to the upper opening of the brick sand mold 5 of the electrofused brick. The riser body 1 is made entirely of graphite material and can be made into a riser shape that meets the requirements for the generation of electrofused bricks by means of machining or mold forming.

[0018] To ensure effectiveness, the thickness of the sidewall of the riser body 1 is 20-50mm.

[0019] like Figure 3 As shown, the thickness of the sidewall 2 of the riser body 1 decreases from the bottom to the top. This structure of thin sidewall at the top and thick sidewall at the bottom can provide better support at the bottom and has a larger contact area with the upper surface of the rotating sand mold, making it less likely for the solution to overflow from the bottom.

[0020] like Figure 5 , 6 As shown, the cross-section of the inner cavity of the riser body 1 is circular.

[0021] The inner diameter of the upper opening of the riser body 1 is 50-200mm larger than that of the lower opening. This structure, which is larger at the top and smaller at the bottom, can prevent the upper solution from solidifying prematurely and failing to flow downwards. In addition, the larger upper opening can also make casting more convenient and prevent the solution from spilling out. Since the faster the casting speed of the electrofused brick is, the better, the higher the quality of the brick can be, thereby effectively increasing the casting speed.

[0022] like Figure 2 , 4 The riser body 1 is an integral structure consisting of a lower variable-diameter section 1b and an upper straight cylindrical section 1a. The upper opening of the straight cylindrical section 1a serves as the casting port for the molten electrofused brick material, and its lower opening is connected to the upper opening of the variable-diameter section 1b. The lower opening of the variable-diameter section 1b is connected to the upper opening of the molten brick sand mold 5. The thickness of the side wall of the variable-diameter section 1b decreases from the lower opening to the upper opening. The side wall of the straight cylindrical section is equal from top to bottom, with a thickness of 20-50mm. The side wall thickness of the lower opening of the variable-diameter section 1b is 50mm, and the side wall thickness of the upper opening is 30mm.

[0023] When using this utility model, such as Figure 5 , 6 As shown, the graphite riser body 1 is placed directly on the brick sand mold 5, with its lower opening connected to the upper opening of the brick sand mold. The inner cavity of the riser body constitutes the feeding space during the electrofused brick casting process. Because the riser is made of graphite, it has the characteristics of high temperature resistance and corrosion resistance, and can be reused, reducing the cost of use. The cost of a conventionally cast sand mold riser is about 15 yuan, and it can only be used once. The processing cost of a graphite sand mold is 400-500 yuan, and it can be reused more than 50 times. After more than 50 uses, if the surface of the graphite riser... Localized oxidation can be easily removed by mechanical processing or manual cleaning, allowing continued use and significantly reducing operating costs. After the electrofused bricks are cast, the riser body can be removed. At high temperatures, the riser portion will not adhere to the inner surface of the graphite riser, eliminating the need for sand removal and reducing costs. The riser castings can be directly crushed and recycled, reducing product impurities. By eliminating the use of sand mold risers, the use and waste of quartz sand are reduced, lowering the environmental burden and aligning with the concept of green manufacturing. The risers are convenient to use, effective, and offer significant social and economic benefits.

Claims

1. A graphite riser for casting electrofused bricks, comprising a riser body (1), the riser body being a hollow structure with openings at the top and bottom, the upper opening (4) serving as a pouring port for the molten electrofused brick, and the lower opening (3) connected to the upper opening of the brick body sand mold (5), characterized in that, The riser body (1) is made entirely of graphite material.

2. The graphite riser for electrofused brick casting according to claim 1, characterized in that, The thickness of the sidewall of the riser body (1) is 20-50mm.

3. The graphite riser for electrofused brick casting according to claim 1, characterized in that, The thickness of the sidewall of the riser body (1) decreases from the bottom to the top.

4. The graphite riser for electrofused brick casting according to claim 1, characterized in that, The cross-section of the inner cavity of the riser body (1) is circular.

5. The graphite riser for electrofused brick casting according to claim 4, characterized in that, The inner diameter of the upper opening of the riser body (1) is 50-200 mm larger than the inner diameter of the lower opening.

6. The graphite riser for electrofused brick casting according to claim 1, characterized in that, The riser body (1) is an integral structure consisting of a lower variable diameter section (1b) and an upper straight cylinder section (1a). The upper opening of the straight cylinder section (1a) serves as the casting port for the molten fused brick material, and the lower opening is connected to the upper opening of the variable diameter section (1b). The lower opening of the variable diameter section (1b) is connected to the upper opening of the fused brick sand mold (5).

7. The graphite riser for electrofused brick casting according to claim 6, characterized in that, The thickness of the sidewall of the variable diameter section (1b) decreases from the lower opening to the upper opening.

8. The graphite riser for electrofused brick casting according to claim 7, characterized in that, The thickness of the lower sidewall of the variable diameter section (1b) is 50 mm, and the thickness of the upper sidewall is 30 mm.

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