Master alloy ingot casting riser

Abstract

The utility model discloses a mother alloy ingot casting riser which comprises a riser body, the riser body is composed of a heating layer, a fireproof layer and an anti-sticking layer in sequence from inside to outside, the inner side wall of the fireproof layer is coated with the heating layer, the outer side wall of the fireproof layer is coated with the anti-sticking layer, a liquid storage cavity is formed in the riser body, an inlet is formed below the liquid storage cavity, and the inlet is communicated with the liquid storage cavity. A top opening is formed above the liquid storage cavity, and a floating plate for sealing the top opening is placed at an inlet; according to the utility model, the heat distribution is more uniform, the shrinkage cavities are concentrated in the riser instead of the cast ingot body, the necking structure is convenient for subsequent cutting and removal, the casting body is prevented from being damaged during cutting, the heat distribution is more uniform, the shrinkage cavities are concentrated in the riser instead of the cast ingot body, and the necking structure is convenient for subsequent cutting and removal. Meanwhile, the casting body is prevented from being damaged during cutting.

Description

A type of master alloy ingot casting riser Technical Field

[0001] This utility model relates to the field of master alloy ingot casting technology, specifically a master alloy ingot casting riser. Background Technology

[0002] In the production of master alloy ingots, risers, as key components for feeding, directly affect the quality of the casting. Traditional risers generally suffer from the following technical bottlenecks: cylindrical risers have feeding dead zones, resulting in high resistance to molten metal flow, and shrinkage cavities easily form in the central area. Furthermore, the open top design leads to severe oxidation. Risers using a single refractory material (such as silica sand) experience rapid heat dissipation, causing premature solidification of the molten metal, and shrinkage cavities easily extend into the ingot body, especially in large-sized master alloy ingots, where the shrinkage cavity defect rate is high. Therefore, those skilled in the art have provided a master alloy ingot casting riser to solve the problems mentioned in the background art. Summary of the Invention

[0003] The purpose of this invention is to provide a master alloy ingot casting riser to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A master alloy ingot casting riser includes a riser body, which is composed of a heating layer, a refractory layer and an anti-sticking layer from the inside out. The inner wall of the refractory layer is coated with the heating layer, and the outer wall of the refractory layer is coated with the anti-sticking layer. A liquid storage cavity is provided inside the riser body. The inlet is below the liquid storage cavity and the top opening is above the liquid storage cavity. A float plate for sealing the top opening is placed at the inlet.

[0006] Furthermore, the heating layer is a heating agent made of aluminum powder, ferrosilicon powder and an oxidant.

[0007] Furthermore, the refractory layer is a refractory aggregate made of magnesium olivine and zircon sand.

[0008] Furthermore, the anti-sticking layer is a zircon powder alcohol-based coating with a coating thickness of 1.5~2mm.

[0009] Furthermore, the riser body is rhomboid in shape, narrow at the top and bottom and wide in the middle, with the float diameter slightly larger than the inner diameter of the top opening.

[0010] By adopting the above technical solution

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The riser body adopts a diamond-shaped design that is narrow at the top, narrow at the bottom, and wide in the middle. The expanded diameter area in the middle increases the liquid storage capacity, while the inclined walls on both sides guide the flow of molten metal, optimizing the feeding path and making the heat distribution more uniform. Shrinkage cavities are concentrated inside the riser rather than in the ingot body. At the same time, this "neck" structure facilitates subsequent cutting and removal, while avoiding damage to the casting body during cutting. The continuous heat release of the heating layer prolongs the solidification time of the molten metal in the storage cavity. Compared with traditional sand mold risers, the feeding distance is increased, effectively eliminating defects such as shrinkage cavities and porosity inside the ingot. The float plate dynamically seals the top opening with the liquid level, maintaining the pressure balance of the feeding channel without manual intervention, avoiding feeding interruption caused by external contamination or sudden heat loss, and improving the casting yield. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the overall structure of a casting riser for a master alloy ingot;

[0014] Figure 2 is a cross-sectional view of a riser for casting a master alloy ingot;

[0015] Figure 3 is a cross-sectional view of a riser for casting a master alloy ingot.

[0016] In the diagram: 1. Riser body; 101. Refractory layer; 102. Anti-sticking layer; 103. Heating layer; 2. Liquid storage chamber; 3. Inlet; 4. Top opening; 5. Float plate. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please refer to Figures 1-3. This utility model provides an embodiment of a master alloy ingot casting riser, including a riser body 1. The riser body 1 is composed of a heating layer 103, a refractory layer 101, and an anti-sticking layer 102, arranged sequentially from the inside out. The heating layer 103 is coated on the inner wall of the refractory layer 101, and the anti-sticking layer 102 is coated on the outer wall of the refractory layer 101. A liquid storage cavity 2 is provided inside the riser body 1. The inlet 3 is below the liquid storage cavity 2, and the top opening 4 is above the liquid storage cavity 2. A float plate 5 for sealing the top opening 4 is placed at the inlet 3. The heating layer 103 is a heating agent made of aluminum powder, ferrosilicon powder, and an oxidant. The refractory layer 101 is made of magnesium olivine. The refractory aggregate is made of olivine and zircon sand. The anti-sticking layer 102 is a zircon powder alcohol-based coating with a coating thickness of 1.5~2mm. The riser body 1 is rhomboid in shape, narrow at the top and bottom and wide in the middle. The diameter of the float 5 is slightly larger than the inner diameter of the top opening 4. The refractory layer 101 (magnesia olivine and zircon sand aggregate) serves as the main frame and withstands the scouring of high-temperature molten metal. The inner heating layer 103 (a heating agent composed of aluminum powder, ferrosilicon powder and oxidant) undergoes an exothermic oxidation reaction after the molten metal is poured, continuously releasing heat and prolonging the time that the molten metal in the storage cavity 2 remains in a liquid state, providing a continuous heat source for feeding the ingot below. The outer anti-sticking layer 102 (1.5~2mm) Zircon powder (alcohol-based coating) forms an isolation film to prevent sand adhesion. During pouring, molten metal is injected into the storage chamber 2 through inlet 3. A float plate 5 rises with the liquid level to the top opening 4, its diameter slightly larger than the inner diameter of the top opening 4, forming a floating seal to prevent external air from entering and causing oxidation, and to reduce heat loss from the top. As the ingot solidifies and shrinks, the molten metal level in the storage chamber 2 drops, and the float plate 5 falls synchronously, always maintaining communication between the feeding channel and the atmosphere, ensuring stable feeding pressure. The riser body adopts a "narrow at the top, narrow at the bottom, and wide in the middle" diamond design. The expanded diameter area in the middle increases the liquid storage capacity, while the inclined walls on both sides guide the flow of molten metal, optimizing the feeding path and making heat distribution more uniform. Shrinkage cavities are concentrated inside the riser rather than in the ingot body. This "necking" design... The structure facilitates subsequent cutting and removal while avoiding damage to the casting body during cutting. The heating layer 103 continuously releases heat, which prolongs the solidification time of the molten metal in the storage chamber 2. Compared with traditional sand mold risers, the feeding distance is increased, effectively eliminating defects such as shrinkage cavities and porosity inside the ingot. The floating plate 5 dynamically seals the top opening 4 with the liquid surface, maintaining the pressure balance of the feeding channel without manual intervention, avoiding feeding interruption caused by external pollution or sudden heat loss, and improving the casting yield.

[0019] The refractory layer 101 (magnesia olivine and zircon sand aggregate) serves as the main frame, bearing the scouring of high-temperature molten metal. The inner heating layer 103 (a heating agent composed of aluminum powder, ferrosilicon powder and oxidant) undergoes an exothermic oxidation reaction after the molten metal is poured, continuously releasing heat and prolonging the time the molten metal in the storage cavity 2 remains in a liquid state, providing a continuous heat source for feeding the ingot below. The outer anti-sticking layer 102 (1.5~2mm zircon powder alcohol-based coating) forms an isolation film to prevent sand from sticking. During pouring, the molten metal is injected into the storage cavity 2 through the inlet 3, and the float 5 rises with the liquid level to the top opening 4. Its diameter is slightly larger than the inner diameter of the top opening 4, forming a floating seal to prevent outside air from entering and causing oxidation, and to reduce heat loss at the top. As the ingot solidifies and shrinks, the molten metal level in the storage cavity 2 drops, and the float 5 falls synchronously, always keeping the feeding channel connected to the atmosphere and ensuring stable feeding pressure.

[0020] The riser body 1 adopts a diamond-shaped design that is narrow at the top, narrow at the bottom, and wide in the middle. The expanded diameter area in the middle increases the liquid storage capacity, and the inclined walls on both sides guide the flow of molten metal, optimizing the feeding path and making the heat distribution more uniform. Shrinkage cavities are concentrated inside the riser rather than in the ingot body. At the same time, this "neck" structure facilitates subsequent cutting and removal, while avoiding damage to the casting body during cutting. The heating layer 103 continuously releases heat, which prolongs the solidification time of the molten metal in the liquid storage chamber 2. Compared with traditional sand mold risers, the feeding distance is increased, effectively eliminating defects such as shrinkage cavities and porosity inside the ingot. The float plate 5 dynamically seals the top opening 4 with the liquid surface, maintaining the pressure balance of the feeding channel without manual intervention, avoiding feeding interruption caused by external contamination or sudden heat loss, and improving the casting yield.

[0021] This specification describes embodiments, but not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A casting riser for a master alloy ingot, characterized in that, The riser body (1) consists of a heating layer (103), a fire-resistant layer (101) and an anti-sticking layer (102) from the inside out. The inner wall of the fire-resistant layer (101) is coated with the heating layer (103), and the outer wall of the fire-resistant layer (101) is coated with the anti-sticking layer (102). The riser body (1) has a liquid storage chamber (2) inside. The bottom of the liquid storage chamber (2) is the inlet (3), and the top of the liquid storage chamber (2) is the top opening (4). A float plate (5) for sealing the top opening (4) is placed in the inlet (3).

2. The master alloy ingot casting riser according to claim 1, characterized in that, The heating layer (103) is a heating agent made of aluminum powder, ferrosilicon powder and oxidant.

3. The master alloy ingot casting riser according to claim 1, characterized in that, The refractory layer (101) is a refractory aggregate made of magnesium olivine and zircon sand.

4. The master alloy ingot casting riser according to claim 1, characterized in that, The anti-stick layer (102) is a zircon powder alcohol-based coating with a coating thickness of 1.5~2mm.

5. The master alloy ingot casting riser according to claim 1, characterized in that, The riser body (1) is rhomboid in shape, narrow at the top and bottom and wide in the middle, and the diameter of the float (5) is slightly larger than the inner diameter of the top opening (4).

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