Device for remelting mother alloy from iron alloy powder

Abstract

A device for remelting iron alloy powder into mother alloy belongs to the technical field of iron alloy casting and comprises a ladle, a powder supply mechanism, a batching chute and an ingot mould, the ladle is positioned above one side of the rear portion of the batching chute, and the powder supply mechanism is positioned above the other side of the rear portion of the batching chute. Iron alloy powder thrown out by the powder supply mechanism and an iron alloy solution poured out by the ladle converge to the same position of the batching chute, an ingot mold is arranged in front of the batching chute, and the feeding speed of the powder supply mechanism is controlled by a control system according to the flow of the iron alloy solution poured out by the ladle. The casting device disclosed by the utility model can ensure full fusion of solid-liquid iron alloy, so that the quality of the cast finished iron alloy reaches good stability.

Description

Technical Field

[0001] The utility model relates to a device for remelting master alloy of ferroalloy powder, belonging to the technical field of ferroalloy casting. Background Art

[0002] In the existing ferroalloy casting production process, large ferroalloys after casting are crushed into required particle sizes by a crusher. During the crushing process, powdery ferroalloys will inevitably be produced. The market price of these powdery ferroalloys is much lower than that of finished ferroalloys. If they are recycled and directly added into the steelmaking furnace for utilization, the alloy powder will float on the surface of the molten steel, making it difficult to stir evenly. The surface of the finished product after melting and casting is not smooth, affecting the quality of the ferroalloy finished product. In addition, the energy consumption for remelting increases during the process of recycling and remelting, and the production cost is high.

[0003] Patent document CN118326184A discloses a method for remelting master alloy of ferroalloy powder. This method uses ferroalloy powder as the molding material when casting ferroalloy liquid. When the ferroalloy liquid flows into the mold, ferroalloy powder is flushed in with the flow to achieve the purpose of casting ferroalloy blocks. This method can recycle ferroalloy powder and reduce mold costs. However, the flow rate of the ferroalloy liquid is constantly changing, so the proportion of the ferroalloy powder flushed in cannot be controlled, which will lead to uncontrollable qualification rate of the composition of the ferroalloy formed after melting and casting, affecting the quality of the ferroalloy finished product.

[0004] Patent document CN113649530A discloses a method for recycling silicon manganese powder materials. In the feeding mechanism of this method, a conical plug that can be pushed downward at the feeding port is used to make the silicon manganese powder materials in the feeding hopper fall into the casting chute and mix with the flowing silicon manganese molten iron in the casting chute to achieve the purpose of fusion. However, since the density of the silicon manganese molten iron is greater than that of the silicon manganese powder materials, the falling silicon manganese powder materials will float on the surface of the silicon manganese molten iron, making it impossible to achieve a sufficient fusion effect. The surface of the finished product after casting is rough and uneven. In addition, it is necessary to manually control the descending height of the conical plug to adjust the gap with the feeding port, thereby controlling the flow rate of the silicon manganese powder materials. The accuracy of controlling the feeding speed in this operation is poor, and it is easy to cause the problem of material accumulation at the feeding point of the casting chute while unable to ensure the melting and casting effect. Summary of the Utility Model

[0005] In order to solve the problems that the quality of the finished product cannot be controlled and material accumulates at the feeding point of the casting chute during the remelting of the existing ferroalloy powder into the master alloy, the utility model provides a device for remelting the master alloy of ferroalloy powder, which includes a ladle 1, a powder supply mechanism 2, a batching chute 3, and an ingot mold 4. The ladle 1 is located above one side at the rear of the batching chute 3, and the powder supply mechanism 2 is located above the other side at the rear of the batching chute 3. The ferroalloy powder thrown by the powder supply mechanism 2 and the ferroalloy solution poured from the ladle 1 converge at the same position of the batching chute 3, and an ingot mold 4 is arranged in front of the batching chute 3.

[0006] The powder supply mechanism 2 is controlled by the control system according to the flow rate of the ferroalloy solution poured from the ladle 1 to control the feeding speed of the supply mechanism.

[0007] The discharge port of the powder supply mechanism 2 has an angle-adjustable structure.

[0008] The discharge port of the powder supply mechanism 2 is rectangular.

[0009] The powder supply mechanism 2 adopts a spiral supply method. The powder supply mechanism 2 includes a storage hopper 21. A spiral feeding mechanism 22 is provided at the lower end of the storage hopper 21. The discharge port of the spiral feeding mechanism 22 is connected to the upper feeding port of the transition hopper 23. A movable hopper 24 is provided at the discharge port of the transition hopper 23. The upper part of the movable hopper 24 is hinged to the mounting frame 26. The middle part of the movable hopper 24 is hinged to one end of the adjusting screw 25, and the other end of the adjusting screw 25 is connected to the mounting frame 26.

[0010] The powder supply mechanism 2 adopts a belt supply method or a vibration supply method.

[0011] The beneficial effects of the present utility model are as follows:

[0012] A. By using a casting method in which the ferroalloy powder thrown by the powder supply mechanism 2 and the ferroalloy solution poured from the ladle 1 converge at the same position of the batching chute 3 and are fully fused as the solid-liquid ferroalloy flows in the batching chute 3, the thrown ferroalloy powder is pressed under the poured ferroalloy solution, so that the solid-liquid ferroalloy is fully fused, avoiding the floating phenomenon of the ferroalloy powder, solving the problems of rough and uneven surface and delamination in the cross section of the finished product after casting, and ensuring good stability of the quality of the finished ferroalloy after casting.

[0013] B. By using the control system to control the feeding speed of the powder supply mechanism 2, it can not only add the corresponding proportion of ferroalloy powder to the ferroalloy solution within a certain time, ensure the casting effect while meeting the maximization of production efficiency, but also prevent the liquid ferroalloy from cooling significantly after adding the ferroalloy powder, ensuring that there is no material accumulation in the batching chute 3.

[0014] C. By using the angle of the discharge port of the powder supply mechanism 2 to be adjustable, the position of the discharge port can be adjusted to meet the requirement of the intersection of the feeding position and the ferroalloy solution, achieving a good fusion effect.

[0015] D. By setting the discharge port of the powder supply mechanism 2 to be rectangular, the throwing surface of the feeding shows a tendency to spread outwards, so that the ferroalloy powder does not concentrate too much when it falls into the batching chute 3, improving the fusion efficiency of the solid-liquid ferroalloy in the batching chute 3.

[0016] E. By fusing ferroalloy powder with the cast ferroalloy solution, while improving the qualified rate of the cast alloy products, the melting temperature is reduced, the mold body is protected, and the equipment reliability is improved. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a ferroalloy powder remelting master alloy device.

[0018] Figure 2 is a schematic structural diagram of the powder supply mechanism 2. Detailed Description of the Invention

[0019] See Figures 1 to 2 and the present utility model will be described in detail through specific embodiments. Embodiment 1

[0020] A device for remelting ferroalloy powder into master alloy, which includes a ladle 1, a powder supply mechanism 2, a batching chute 3, and an ingot mold 4. The ladle 1 is located above one side at the rear of the batching chute 3, and the powder supply mechanism 2 is located above the other side at the rear of the batching chute 3. The ferroalloy powder of ferrosilicon thrown by the powder supply mechanism 2 and the ferrosilicon alloy solution poured from the ladle 1 converge at the same position of the batching chute 3. An ingot mold 4 is provided in front of the batching chute 3. The powder supply mechanism 2 is controlled by a control system to adjust the feeding speed of the supply mechanism. The discharge port of the powder supply mechanism 2 is rectangular, and the discharge port of the powder supply mechanism 2 is a structure with adjustable angle, and the horizontal angle at the discharge port is adjusted to 35 degrees.

[0021] The powder supply mechanism 2 is preferably a spiral supply method. The powder supply mechanism 2 includes a storage hopper 21, a spiral feeding mechanism 22 is provided at the lower end of the storage hopper 21, the discharge port of the spiral feeding mechanism 22 is connected to the upper feeding port of the transition hopper 23, a movable hopper 24 is provided at the discharge port of the transition hopper 23, the upper part of the movable hopper 24 is hinged to the mounting frame 26, the middle part of the movable hopper 24 is hinged to one end of the adjusting screw 25, and the other end of the adjusting screw 25 is connected to the mounting frame 26.

[0022] The powder supply mechanism 2 can also be replaced by a belt supply method or a vibration supply method.

[0023] According to the above device for remelting ferroalloy powder into master alloy, it includes the following technological steps:

[0024] S1: The tapping temperature of ferrosilicon alloy is 1400°C to 1500°C. 10t of ferrosilicon alloy solution to be cast is loaded into the ladle 1, and ferrosilicon alloy powder with a particle size of 0.1 to 3mm is loaded into the powder supply mechanism 2;

[0025] S2: The ferrosilicon alloy powder is thrown out from the discharge port of the powder supply mechanism 2. The ladle 1 is tilted to pour the ferrosilicon alloy solution. The flowing ferrosilicon alloy solution and the thrown ferrosilicon alloy powder first converge at the same position in the batching chute 3. Then, during the flow of the ferrosilicon alloy solution in the batching chute 3, it is fully fused with the ferrosilicon alloy powder. The control system controls the feeding speed of the powder supply mechanism 2 according to the flow rate of the ferrosilicon alloy solution poured by the ladle 1, so that it can complete the feeding of 0.5 t and pour 10 t of ferrosilicon alloy solution in 20 minutes.

[0026] S3: The fused ferrosilicon alloy solution is gradually cast into the ingot mold 4 and forms the finished ferrosilicon alloy after cooling. Example Two

[0027] A device for remelting master alloy of silicomanganese alloy powder, which includes a ladle 1, a powder supply mechanism 2, a batching chute 3, and an ingot mold 4. The ladle 1 is located above one side at the rear of the batching chute 3, and the powder supply mechanism 2 is located above the other side at the rear of the batching chute 3. The silicomanganese alloy powder thrown by the powder supply mechanism 2 and the silicomanganese alloy solution poured by the ladle 1 converge at the same position in the batching chute 3. There is an ingot mold 4 in front of the batching chute 3. The feeding speed of the supply mechanism of the powder supply mechanism 2 is controlled by the control system. The discharge port of the powder supply mechanism 2 is rectangular, and the discharge port of the powder supply mechanism 2 is a structure with adjustable angle, and the horizontal included angle at its discharge port is adjusted to 35 degrees.

[0028] The powder supply mechanism 2 is preferably a spiral supply method. The powder supply mechanism 2 includes a storage hopper 21. A spiral feeding mechanism 22 is provided at the lower end of the storage hopper 21. The discharge port of the spiral feeding mechanism 22 is connected to the upper feeding port of the transition hopper 23. An active hopper 24 is provided at the discharge port of the transition hopper 23. The upper part of the active hopper 24 is hinged to the mounting frame 26, and the middle part of the active hopper 24 is hinged to one end of the adjusting screw 25, and the other end of the adjusting screw 25 is connected to the mounting frame 26.

[0029] According to the above device for remelting master alloy of silicomanganese alloy powder, it includes the following technological steps:

[0030] S1: The tapping temperature of the silicomanganese alloy is 1300 °C - 1400 °C. 20 t of silicomanganese alloy solution is loaded into the ladle 1, and silicomanganese alloy powder with a particle size of 0.1 - 10 mm is loaded into the powder supply mechanism 2.

[0031] S2: The ferrosilicon manganese alloy powder is ejected from the discharge port of the powder supply mechanism 2, and the ladle 1 is tilted to pour the ferrosilicon manganese alloy solution. The flowing ferrosilicon manganese alloy solution and the ejected ferrosilicon manganese alloy powder first converge at the same position of the batching chute 3. Immediately, during the flow of the ferrosilicon manganese alloy solution in the batching chute 3, it is fully fused with the ferrosilicon manganese alloy powder. The control system controls the feeding speed of the powder supply mechanism 2 according to the flow rate of the ferrosilicon manganese alloy solution poured by the ladle 1, so that 2 tons of feeding and 20 tons of ferrosilicon manganese alloy solution pouring are completed in 20 minutes;

[0032] S3: The fused ferrosilicon manganese alloy solution is gradually cast into the ingot mold 4 and forms the finished ferrosilicon manganese alloy after cooling.

Claims

1. A device for remelting a master alloy of ferroalloy powder, comprising a molten iron ladle (1) and an ingot mold (4), characterized in that: It also includes a powder supply mechanism (2) and a batching chute (3), wherein the molten iron ladle (1) is located above one side of the rear portion of the batching chute (3), and the powder supply mechanism (2) is located above the other side of the rear portion of the batching chute (3). The ferroalloy powder thrown out by the powder supply mechanism (2) and the ferroalloy solution poured out by the molten iron ladle (1) converge at the same position of the batching chute (3), and an ingot mold (4) is provided in front of the batching chute (3).

2. The device for remelting a master alloy of ferroalloy powder according to claim 1, characterized in that: The powder supply mechanism (2) is controlled by a control system to control the feeding speed of the supply mechanism according to the flow rate of the ferroalloy solution poured from the molten iron ladle (1).

3. The device for remelting a master alloy of ferroalloy powder according to claim 1, characterized in that: The discharge port of the powder supply mechanism (2) is an angle-adjustable structure.

4. The device for remelting a master alloy of ferroalloy powder according to claim 1, characterized in that: The discharge port of the powder supply mechanism (2) is rectangular.

5. The device for remelting a master alloy of ferroalloy powder according to any one of claims 1 to 4, characterized in that: The powder supply mechanism (2) is a spiral supply method. The powder supply mechanism (2) comprises a storage hopper (21). A spiral feeding mechanism (22) is provided at the lower end of the storage hopper (21). The discharge port of the spiral feeding mechanism (22) is connected to the upper feed port of the transition hopper (23). A movable hopper (24) is provided at the discharge port of the transition hopper (23). The upper part of the movable hopper (24) is hinged to a mounting frame (26). The middle part of the movable hopper (24) is hinged to one end of an adjusting screw (25). The other end of the adjusting screw (25) is connected to the mounting frame (26).

6. The device for remelting a master alloy of ferroalloy powder according to any one of claims 1 to 4, characterized in that: The powder supply mechanism (2) is a belt supply method or a vibration supply method.

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