Silicon-manganese alloy casting device and method

Abstract

A silicon manganese alloy casting device and method, the device relates to the technical field of silicon manganese alloy production equipment;Including liquid inlet vertical cavity, smoke collecting pipe, cover, bottom wall, plate groove, opening and closing controller, broken material peg head;The bottom of both sides of the bottom wall is rotationally provided with a plate groove;The plate groove is opened and closed through the opening and closing controller, and the bottom of the bottom wall is closed after the plate groove is closed;The top of the bottom wall is covered with a cover;The plate groove, the cover and the bottom wall form a casting area;The back of the cover is fixed with a liquid inlet vertical cavity;The other end of the smoke collecting pipe is connected with an industrial dust collector;Reduce the diffusion of smoke during casting;After the pit in the factory is cooled, the silicon manganese alloy casting area is opened, and there is a certain height difference under the casting area;The cooled ingot falls to the receiving hole plate, the broken material peg head collides with the ingot, the ingot is broken along the broken material peg head to complete the preliminary crushing, the preliminary crushed block is automatically discharged, and the compression preliminary crushing time is compressed.

Description

Technical Field

[0001] This invention relates to the field of silicon-manganese alloy production equipment technology, specifically to a silicon-manganese alloy casting device and method. Background Technology

[0002] Tapping the ferrosilicon manganese alloy is the final and crucial step in the smelting process, involving the discharge and subsequent treatment of the high-temperature liquid alloy. During tapping, the furnace opening is first performed using a tapping machine. The ferrosilicon manganese alloy flows from the taphole into the molten iron ladle, and overflows and separates the slag through a stepped ladle arrangement; the slag overflows and is discharged first.

[0003] After slag separation, the molten iron ladle is transported to the casting area by overhead crane for casting. In-situ casting is carried out in a pit. After casting, the silicon-manganese alloy solidifies after cooling. Operators need to operate a crusher to perform preliminary crushing using hammers. The material after preliminary crushing is then transferred to the stockyard by a loader for secondary crushing according to customer requirements.

[0004] The following problems exist in this process flow: I. Most ferrosilicon alloys cast in pits require natural cooling. During the cooling process, if a hood is installed, the crusher will lack operating conditions after cooling due to interference from the hood. Without a hood, fumes will diffuse, affecting the plant environment. II. The ferrosilicon alloy is initially crushed by a crusher-driven hammer. This initial crushing facilitates the transfer of the ferrosilicon alloy material. Subsequent manual secondary crushing is required, which is more precise and ensures the size of the ferrosilicon alloy blocks is within the customer's requirements. During the initial crushing process, relying solely on the hammer is inefficient, requiring the hammer to process the blocks point by point. III. After initial crushing, a loader is needed to scoop the blocks out of the pit. For large pits, the loader's arm cannot cover the entire area, making the transfer of the ferrosilicon alloy difficult. After ensuring the ferrosilicon alloy is completely cooled and the pit guardrail is opened, the loader needs to enter the pit multiple times to scoop the material, affecting the discharge speed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a silicon-manganese alloy casting device and method. The method involves casting using this device, which operates within a closed cavity during the casting process. A dust extraction duct uses negative pressure to draw dust to an industrial dust collector, reducing dust diffusion during casting. After cooling in the factory pit, the silicon-manganese alloy casting area is opened. Due to a certain height difference below the casting area, the cooled ingot falls onto the receiving plate. The crushing nails collide with the ingot, causing it to break along the nails, completing the initial crushing. The initially crushed material is automatically discharged, facilitating direct transfer by a loader and reducing the initial crushing time.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A silicon-manganese alloy casting device includes a liquid inlet vertical cavity, a smoke collection pipe, a shield, a bottom wall, a plate groove, an opening and closing controller, and a scrap nail head. The bottom wall has rotatable plate grooves on both sides at its bottom. The plate grooves are opened and closed by the opening and closing controller; when closed, the plate grooves seal the bottom of the bottom wall. The bottom wall is covered by a shield. The plate grooves, shield, and bottom wall together form a casting area. The liquid inlet vertical cavity is fixed to the back of the shield and leads into the casting area within the shield. A smoke collection pipe is located on the top of the shield and connects to each shield and the liquid inlet vertical cavity. One end of the smoke collection pipe is connected to an industrial dust collector.

[0007] Preferably, the shield is divided into two parts: a fixed half-shield and a movable half-shield; the fixed half-shield and the movable half-shield are hinged together; the movable half-shield is opened upward by flipping; a hinge frame is fixed on the liquid inlet vertical cavity; the middle part of the hinge frame is hinged to the end of the shield opening cylinder; the telescopic end of the shield opening cylinder is hinged to the back of the movable half-shield.

[0008] Preferably, the opening and closing controller includes: an opening and closing motor, a first gear, a second gear, a rotating shaft, an opening and closing plate, and guide wheels; the opening and closing motor is fixed on both sides of the fixed half cover; the first gear is fixed on the driving end of the opening and closing motor; a bushing is fixed on the outer side of the bottom wall; a rotating shaft is rotatably disposed inside the bushing; a second gear is fixed on the top of the rotating shaft; the second gear meshes with the first gear; an opening and closing plate is fixed on the bottom of the rotating shaft; guide wheels are fixed on both ends of the opening and closing plate; the opening and closing plate is opened by rotating the blocking plate groove or closing the plate groove by driving the plate groove.

[0009] Preferably, the top of the liquid inlet vertical cavity is provided with a slot to prevent interference with the overhead crane's hoisting; the bottom of the liquid inlet vertical cavity is provided with an inclined surface.

[0010] Preferably, a support platform is fixed at the bottom of the liquid inlet vertical cavity; a pusher cylinder is installed inside the support platform; and a pusher shovel is installed at the telescopic end of the pusher cylinder.

[0011] Preferably, a base is provided below the plate groove, and material breaking nails are arranged and fixed on the top surface of the base. A hole is provided above the base through which a material receiving plate corresponding to the material breaking nail passes. The two ends of the material receiving plate are fixedly connected to the telescopic ends of the lifting cylinder.

[0012] Preferably, the bottom of the discharge end of the base is provided with a groove that cooperates with the bucket.

[0013] A method for casting a silicon-manganese alloy, using the aforementioned silicon-manganese alloy casting apparatus, comprises the following steps: Initial state: The opening and closing controller controls the slot to be closed, the lifting cylinder retracts to control the receiving hole plate 13 to be in the lowest position, and the broken nail head passes through the hole of the receiving hole plate; S1, fine powder of chilled iron of the same material as the product to be cast is laid on the surface of the closed plate groove; chilled iron of the same material as the product to be cast is laid on the inclined surface of the liquid inlet vertical cavity; this step is the preparation work before pouring and casting. S2, molten iron ladles are hoisted to their respective inlet vertical chambers by overhead cranes; the molten iron ladles are poured out; to prevent the spread of flue gas, the flue gas in the inlet vertical chamber is drawn in by negative pressure through the flue gas collection pipe; S3, the molten silicon-manganese alloy flows into the casting area through the inlet of the shield and is temporarily stored and waits for cooling. The natural cooling time is ≥48 hours. After cooling, it forms a sheet-like solid alloy. During the cooling process, the flue gas in the casting area is drawn into the industrial dust collector through the negative pressure of the flue gas collection pipe. S4 controls the opening cylinder to open the movable half cover, detects the temperature of the silicon-manganese alloy, and the temperature of the exit pit is ≤150℃, which meets the cooling requirements; after cooling, the silicon-manganese alloy is relatively brittle.

[0014] S5, after the silicon-manganese alloy cools to the specified temperature range, the opening and closing motor is controlled to open the opening and closing plate; the plate groove is released from the restriction and opens downward; the sheet-like solid alloy falls and breaks after impacting the crushing nail head, completing the initial crushing; S6 controls the lifting cylinder to raise the receiving plate, causing the broken material nail heads to retract into the hole to avoid interfering with the pushing operation of the pusher shovel; the receiving loader moves the end of the bucket to the corresponding groove position on the base to prepare for receiving the material. S7 controls the pusher cylinder to push the initially crushed blocks into the bucket. The loader then transfers the blocks to the material yard, where workers perform manual secondary crushing.

[0015] Beneficial effects of this invention: 1. During the casting of silicon-manganese alloy, the casting area is sealed to facilitate the collection of flue gas. The hood can be opened to inspect the casting area. 2. During the tilting process of the liquid inlet vertical chamber, some flue gas can also be collected, reducing its diffusion. 3. After casting and cooling, the material is pre-crushed during the unloading process. The pre-crushed material is automatically transferred to the receiving bucket of a loader via a pusher shovel, eliminating the need for the loader to manually scoop the material, avoiding interference from the hood, and improving operational efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall connection relationship of the present invention.

[0018] Figure 2 This is a schematic diagram of the material dropping state structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the liquid inlet vertical cavity structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the connection relationship of the opening and closing controller of the present invention.

[0021] Figure 5 This is a schematic diagram of the material pushing state connection relationship of the present invention.

[0022] Figure 6 This is a schematic diagram of the closed state of the plate groove of the present invention.

[0023] In the diagram, the components are: 1. Liquid inlet vertical cavity; 1.1. Groove; 1.2. Inclined surface; 2. Smoke collection pipe; 3. Cover; 3. Movable half cover; 3.1. Fixed half cover; 3.2. Bottom wall; 4. Plate groove; 5. Opening and closing controller; 6. Opening and closing motor; 6.1. First gear; 6.2. Second gear; 6.3. Rotating shaft; 6.4. Opening and closing plate; 6.5. Guide wheel; 6.6. Bushing; 6.7. Crushed material nail head; 7. Hinge frame; 8. Cover opening cylinder; 9. Support platform; 10. Pushing cylinder; 11. Pushing shovel; 12. Receiving hole plate; 13. Lifting cylinder; 14. Base; 15. Groove; 15.1. Detailed Implementation

[0024] like Figure 1-3 As shown, to achieve the above objectives, the present invention is implemented through the following technical solution: A casting device is provided, comprising four sets, three of which operate simultaneously and one set as a standby. The casting position is enclosed by a U-shaped bottom wall 4. The bottom of the bottom wall 4 has rotatable grooves 5 on both sides. The grooves 5 are controlled to open and close by an opening / closing controller 6; when closed, the grooves seal the bottom of the bottom wall 4. A shield 3 covers the top of the bottom wall 4. The grooves 5, shield 3, and bottom wall 4 together form the casting area. The surface of the grooves 5 is covered with refractory material. A liquid inlet vertical cavity 1 is fixed to the back of the shield 3. A slot 1.1 is provided at the top of the liquid inlet vertical cavity 1 to prevent interference with the overhead crane's hoisting. An overhead crane with multiple hooks is mounted above the liquid inlet vertical cavity 1 to facilitate the hoisting of the molten iron ladle. An inclined surface 1.2 is provided at the bottom of the liquid inlet vertical cavity 1. The back of the liquid inlet vertical cavity 1 is connected to the casting area inside the shield 3; the top of the shield 3 is provided with a smoke collection pipe 2; the smoke collection pipe 2 is connected to each shield 3 and the liquid inlet vertical cavity 1 respectively; one end of the smoke collection pipe 2 is connected to an industrial dust collector.

[0025] like Figure 2-4As shown, the shield 3 is divided into two parts: a fixed half-shield 3.2 and a movable half-shield 3.1. The fixed half-shield 3.2 and the movable half-shield 3.1 are hinged together. The movable half-shield 3.1 opens upwards by flipping. A hinge frame 8 is fixed on the liquid inlet vertical cavity 1. The middle part of the hinge frame 8 is hinged to the end of the shield opening cylinder 9. The telescopic end of the shield opening cylinder 9 is hinged to the back of the movable half-shield 3.1. The front end of the movable half-shield 3.1 extends downwards, and after closing, the front extension of the sealing plate groove 5 is covered with refractory material.

[0026] like Figure 4 As shown, the opening and closing controller 6 includes: an opening and closing motor 6.1, a first gear 6.2, a second gear 6.3, a rotating shaft 6.4, an opening and closing plate 6.5, and a guide wheel 6.6; the opening and closing motor 6.1 is fixed on both sides of the fixed half cover 3.2; the driving end of the opening and closing motor 6.1 is vertically downward, and the first gear 6.2 is fixed on the driving end; a bushing 6.7 is fixed on the outer side of the bottom wall 4; the rotating shaft 6.4 is rotatably mounted inside the bushing 6.7; the second gear 6.3 is fixed on the top of the rotating shaft 6.4; the second gear 6.3 meshes with the first gear 6.2; the opening and closing plate 6.5 is fixed on the bottom of the rotating shaft 6.4; the guide wheel 6.6 is a metal wheel body, which can ensure the smooth rotation of the closed plate groove 5; the opening and closing plate 6.5 opens or drives the plate groove 5 to close by rotating the blocking plate groove 5, and the two plate grooves 5 of two adjacent casting devices can share one set of opening and closing controller 6.

[0027] like Figure 2 , 5 As shown in Figure 6, a support platform 10 is fixed to the bottom of the liquid inlet vertical cavity 1, and a pusher cylinder 11 is installed inside the support platform 10; a pusher shovel 12 is installed at the telescopic end of the pusher cylinder 11. A receiving hole plate 13 is slidably provided below the plate groove 5 in the vertical direction; a fragment nail head 7 is fixed below the receiving hole plate 13; after the receiving hole plate 13 is lowered to its lowest height, the fragment nail head 7 extends out from the hole in the receiving hole plate 13; both ends of the receiving hole plate 13 are fixedly connected to the telescopic end of the lifting cylinder 14. The fragment nail heads 7 are arranged and fixed on the surface of the base 15; the bottom of the discharge end of the base 15 is provided with a groove 15.1 that cooperates with the bucket. Unless otherwise described, the fixing methods mentioned above are all welded or threaded fastened using common technical means in the industry. Silicon-manganese alloy casting process: Initial state: The opening and closing controller 6 controls the slot 5 to be in the closed state, the lifting cylinder 14 retracts to control the receiving hole plate 13 to be in the lowest position, and the broken material nail head 7 passes through the hole in the receiving hole plate 13. Step 1: Spread chill powder of the same material as the product to be cast on the surface of the closed plate groove 5; spread chill material of the same material as the product to be cast on the inclined surface 1.2 of the liquid inlet vertical cavity 1; this step is the preparation work before pouring and casting. Step 2: The molten iron ladles are hoisted to their respective inlet vertical chambers 1 by overhead crane; the molten iron ladles are poured out; to prevent the spread of flue gas, the flue gas inlet vertical chamber 1 is drawn in by negative pressure through the flue gas collection pipe 2. Step 3: The molten silicon-manganese alloy flows into the casting area through the inlet of the shield 3 and is temporarily stored and awaits cooling. The natural cooling time is ≥48 hours. After cooling, a sheet-like solid alloy is formed. During the cooling process, the flue gas in the casting area is drawn into the industrial dust collector through the negative pressure of the smoke collection pipe 2. Step 4: Control the opening cylinder to open the movable half cover 3.1, and check the temperature of the silicon-manganese alloy. The temperature after exiting the pit is ≤150℃, which meets the cooling requirements. After cooling, the silicon-manganese alloy is relatively brittle.

[0028] Step 5: After the silicon-manganese alloy cools to the specified temperature range, control the opening and closing motor to open the opening and closing plate; the plate groove 5 is released from the restriction and opens downward; the sheet-like solid alloy falls and shatters after impacting the crushing nail head 7, completing the initial crushing; (Note: Silicon-manganese alloy is mainly composed of elements such as silicon, manganese, and iron. These elements exist in specific proportions in the alloy, giving it unique physical and chemical properties. At room temperature, silicon-manganese alloy is in a solid state and has high hardness and brittleness, which means that it will fracture or break when subjected to external force. Based on this characteristic, the inertial falling impact on the fragment nail head 7 simulates manual crushing. Compared with hammer crushing, this can reduce the fragments generated in the initial crushing and reduce the loss of silicon-manganese alloy.) Step six: Control the lifting cylinder 14 to raise the receiving plate 13, causing the broken material nail head 7 to retract into the hole to avoid interfering with the pushing operation of the pusher shovel 12; the receiving loader moves the end of the bucket to the corresponding groove 15.1 position of the base 15 to prepare for receiving the material. Step 7: Control the pusher cylinder 11 to push the initially crushed blocks into the bucket. The loader transfers the blocks to the material yard, where workers perform manual secondary crushing. During the secondary crushing, manual crushing makes it easier to control the amount of crushed material. Manual operation requires hammering the blocks to further reduce their size, thus avoiding excessive crushing by the crushing equipment and increased losses.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A silicon-manganese alloy casting apparatus, characterized in that: It includes a liquid inlet vertical cavity, a smoke collection pipe, a shield, a bottom wall, a plate groove, an opening and closing controller, and a scrap nail head; the bottom of both sides of the bottom wall are rotatably provided with plate grooves; the plate grooves are opened and closed by the opening and closing controller, and the bottom of the bottom wall is sealed when the plate grooves are closed; the bottom wall is covered by a shield; the plate grooves, shield, and bottom wall enclose a casting area; the liquid inlet vertical cavity is fixed to the back of the shield; The liquid inlet vertical cavity leads into the casting area inside the shield; the top of the shield is provided with a smoke collection pipe; the smoke collection pipe is connected to each shield and the liquid inlet vertical cavity respectively; one end of the smoke collection pipe is connected to an industrial dust collector.

2. The silicon-manganese alloy casting apparatus according to claim 1, characterized in that: The shield is divided into two parts: a fixed half-shield and a movable half-shield; the fixed half-shield and the movable half-shield are hinged together; the movable half-shield is opened upwards by flipping; a hinge frame is fixed on the liquid inlet vertical cavity; the middle part of the hinge frame is hinged to the end of the shield opening cylinder; the telescopic end of the shield opening cylinder is hinged to the back of the movable half-shield.

3. The silicon-manganese alloy casting apparatus according to claim 1, characterized in that: The opening and closing controller includes: an opening and closing motor, a first gear, a second gear, a rotating shaft, an opening and closing plate, and guide wheels; the opening and closing motor is fixed on both sides of the fixed half cover; the first gear is fixed on the drive end of the opening and closing motor; a bushing is fixed on the outer side of the bottom wall; a rotating shaft is rotatably mounted inside the bushing; a second gear is fixed on the top of the rotating shaft; the second gear meshes with the first gear; an opening and closing plate is fixed on the bottom of the rotating shaft; guide wheels are fixed on both ends of the opening and closing plate; the opening and closing plate is opened by rotating the blocking plate groove or closing the plate groove.

4. The silicon-manganese alloy casting apparatus according to claim 1, characterized in that: The top of the liquid inlet vertical cavity is provided with a slot to prevent interference with the overhead crane's hoisting; the bottom of the liquid inlet vertical cavity is provided with an inclined surface.

5. The silicon-manganese alloy casting apparatus according to claim 4, characterized in that: A support platform is fixed at the bottom of the liquid inlet vertical cavity; a pusher cylinder is installed inside the support platform; and a pusher shovel is installed at the telescopic end of the pusher cylinder.

6. The silicon-manganese alloy casting apparatus according to claim 3, characterized in that: A base is provided below the plate groove, and breaking nails are arranged and fixed on the top surface of the base. A hole is provided above the base through which a receiving plate corresponding to the breaking nail passes. The two ends of the receiving plate are fixedly connected to the telescopic ends of the lifting cylinder.

7. A silicon-manganese alloy casting apparatus according to claim 6; characterized in that: The bottom of the discharge end of the base is provided with a groove that cooperates with the bucket.

8. A method for casting a silicon-manganese alloy, comprising casting using a silicon-manganese alloy casting apparatus as described in claim 1, characterized in that, The steps are as follows: Initial state: The opening and closing controller controls the slot to be closed, the lifting cylinder retracts to control the receiving hole plate 13 to be in the lowest position, and the broken nail head passes through the hole of the receiving hole plate; S1, fine powder of chilled iron of the same material as the product to be cast is laid on the surface of the closed plate groove; chilled iron of the same material as the product to be cast is laid on the inclined surface of the liquid inlet vertical cavity; this step is the preparation work before pouring and casting. S2, molten iron ladles are hoisted to their respective inlet vertical chambers by overhead cranes; the molten iron ladles are poured out; to prevent the spread of flue gas, the flue gas in the inlet vertical chamber is drawn in by negative pressure through the flue gas collection pipe; S3, the molten silicon-manganese alloy flows into the casting area through the inlet of the shield and is temporarily stored and waits for cooling. The natural cooling time is ≥48 hours. After cooling, it forms a sheet-like solid alloy. During the cooling process, the flue gas in the casting area is drawn into the industrial dust collector through the negative pressure of the flue gas collection pipe. S4 controls the opening cylinder to open the movable half cover, detects the temperature of the silicon-manganese alloy, and the temperature of the exit pit is ≤150℃, which meets the cooling requirements; after cooling, the silicon-manganese alloy is relatively brittle. S5, after the silicon-manganese alloy cools to the specified temperature range, the opening and closing motor is controlled to open the opening and closing plate; the plate groove is released from the restriction and opens downward; the sheet-like solid alloy falls and breaks after impacting the crushing nail head, completing the initial crushing; S6 controls the lifting cylinder to raise the receiving plate, causing the broken material nail heads to retract into the hole to avoid interfering with the pushing operation of the pusher shovel; the receiving loader moves the end of the bucket to the corresponding groove position on the base to prepare for receiving the material. S7 controls the pusher cylinder to push the initially crushed blocks into the bucket. The loader then transfers the blocks to the material yard, where workers perform manual secondary crushing.

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