Low-carbon magnesium-zirconium carbon converter slide sintering device

Abstract

The utility model discloses a low -carbon magnesium zirconium carbon converter sliding plate sintering device relates to converter steelmaking sliding plate preparation technical field, including hearth shell, the hearth shell bottom is provided with control box, the hearth shell inside is provided with sintering chamber, and sintering chamber outside is provided with resistance wire heating structure, the hearth shell right side is provided with first air pipe, and the hearth shell top is provided with raw material processing jar, and raw material processing jar upper surface left and right sides all are provided with the inlet, and the inlet bottom is connected with the crushing chamber, and the crushing chamber bottom is provided with the discharge gate, the raw material processing jar inside is provided with the stirring rod, and the raw material processing jar bottom discharge gate inside is provided with two crushing rollers. This low -carbon magnesium zirconium carbon converter sliding plate sintering device has solved the problem of the lack of raw material fineness and uneven density in traditional sintering, makes the sliding plate porosity stable, and the erosion resistance is improved by 20%, and is suitable for the efficient sintering of low -carbon magnesium zirconium carbon converter sliding plate.

Description

Technical Field

[0001] This utility model relates to the field of converter steelmaking slide plate preparation technology, specifically a low-carbon magnesium zirconium carbon converter slide plate sintering device. Background Technology

[0002] The low-carbon magnesia-zirconium-carbon converter slide plate is a key refractory component in the converter steelmaking tapping process. It is made from granular aggregates such as coated fused magnesia-zirconium sand particles and high-purity magnesia sand, combined with co-ground powder containing metallic aluminum powder and silicon carbide powder, manufactured through a specific process. Its advantages are significant: its low carbon content meets the production requirements of low-carbon and ultra-low-carbon steel; it possesses excellent corrosion resistance, able to withstand the erosion of high-temperature molten steel and strongly alkaline slag; and it has good thermal shock stability, able to withstand frequent temperature changes. This slide plate greatly extends its service life, providing strong support for efficient and stable converter production. However, existing slide plate sintering devices still have some problems in their use:

[0003] In existing sintering apparatuses, such as the vacuum sintering apparatus described in application number 202321962790.2, the technical solution includes a sintering apparatus body, a cover plate on the top of the sintering apparatus body, a sintering assembly inside the sintering apparatus body, three supports at the bottom of the sintering apparatus body, a circular groove in the center of the top of the cover plate, and a sealing assembly at the bottom of the cover plate. This vacuum sintering apparatus, by setting up the sintering assembly, achieves the following: during the vacuum sintering process, the heating area of ​​the magnetic material can be increased by the set heat-conducting rod, and the rotating plate allows the magnetic material to exchange heat with each other during sintering, resulting in more uniform heating and faster sintering speed.

[0004] However, in order to reduce refractory consumption and extend the service life of refractory at the converter tapping point, it is necessary to further improve the quality of the slide plate products. The ratio of raw materials during the sintering process of the slide plate is crucial. Existing technology lacks a precise control mechanism for the fineness of raw material powder. Due to the inability to effectively control the particle size of raw materials, it is difficult for the powder to achieve uniform distribution and full fusion during the sintering process, resulting in problems such as uneven density and unstable porosity in the internal structure of the slide plate.

[0005] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0006] To address the aforementioned issues, an innovative design was implemented based on the existing sintering equipment. Utility Model Content

[0007] The purpose of this invention is to provide a low-carbon magnesium zirconium carbon converter slide plate sintering device to solve the problems mentioned in the background art, such as the inability to guarantee the fineness of raw materials, resulting in uneven density and unstable porosity.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A low-carbon magnesium-zirconium-carbon converter sintering device includes a furnace shell, which is a box-type structure with a door on the front. A control box is located at the bottom of the furnace shell, with an operation panel on the front and four support legs on the bottom. A sintering chamber is located inside the furnace shell, with a resistance wire heating structure on the outer side of the sintering chamber. A first air inlet pipe is located on the right side of the furnace shell, and a raw material processing tank is located above the furnace shell. The raw material processing tank has inlets on both the left and right sides of its upper surface, with a crushing chamber connected to the bottom of the inlets and an outlet at the bottom of the crushing chamber. A stirring rod is located inside the raw material processing tank, and the outlet at the bottom of the raw material processing tank is connected to the sintering chamber. Two crushing rollers are located inside the outlet at the bottom of the raw material processing tank.

[0010] Preferably, a first servo motor is fixedly installed on the top of the raw material processing tank, and a stirring rod is installed at the output end of the first servo motor via a rotating rod, and a first bevel gear is installed above the rotating rod.

[0011] Using the above technical solution, the first servo motor drives the stirring rod to rotate, stirring and mixing the raw materials such as magnesium zirconium sand and silicon carbide in the raw material processing tank, ensuring that the raw material powder is evenly distributed and the mixing uniformity is improved, so as to provide homogeneous raw materials for subsequent sintering.

[0012] Preferably, the first bevel gear is meshed with a second bevel gear on both its left and right sides, and the second bevel gear is connected to an auger roller on both its left and right sides via a rotating rod.

[0013] Using the above technical solution, the first bevel gear meshes with the second bevel gear to drive the auger roller to rotate, conveying the raw material to the crushing chamber and initially crushing it, so that the particle size of the raw material is initially reduced to 50-100μm, laying the foundation for subsequent fine crushing.

[0014] Preferably, a second servo motor is fixedly installed on the outside of the bottom outlet of the raw material processing tank, and a first gear is connected to the output end of the second servo motor, and a second gear is meshed with the rear side of the first gear.

[0015] Using the above technical solution, the second servo motor drives the crushing roller to rotate at high speed through the transmission between the first gear and the second gear, and performs secondary grinding on the raw material. The particle size can be precisely controlled within 10-30μm, which meets the requirements of low-carbon slide plate sintering for the fineness of the raw material.

[0016] Preferably, both the right ends of the first gear and the second gear are connected to a crushing roller, and the crushing roller forms a grinding structure for the raw material powder fed from the raw material processing tank.

[0017] Using the above technical solution, two crushing rollers rotate in opposite directions to generate shearing force, which finely grinds the raw material powder, so that the standard deviation of the powder particle size distribution is ≤5μm.

[0018] Preferably, a water tank is fixedly installed on the rear side of the furnace shell, and pumps are provided on both the left and right sides of the water tank, and circulation pipes are connected to the outside of the pumps. A cooling chamber is provided on the outside of the sintering chamber, and circulation pipes are connected to the left and right sides of the cooling chamber.

[0019] Using the above technical solution, the water tank delivers cooling water to the cooling chamber through a pump and circulation pipe, circulating and cooling the sintering chamber to stabilize the cooling rate of the sintered slide plate and avoid cracks caused by rapid cooling.

[0020] Preferably, a second air inlet pipe is provided on the left side of the sintering chamber, and the second air inlet pipe is connected to cold air from the outside. A cooling chamber is provided on the outer side of the sintering chamber, and heat dissipation vents are provided on both the left and right sides of the cooling chamber, and a cooling fan is provided in each heat dissipation vent.

[0021] Using the above technical solution, cold air is introduced through the second air inlet pipe, which, together with the cooling chamber and the cooling fan, enables rapid cooling of the sintering chamber, shortening the time from the sintering temperature to room temperature. At the same time, the cooling fan makes the airflow velocity in the cooling chamber reach 2m / s, improving the heat dissipation efficiency.

[0022] Compared with the prior art, the beneficial effects of this utility model are: this low-carbon magnesium zirconium carbon converter slide plate sintering device,

[0023] 1. The crushing and mixing system ensures uniform and fine raw materials: The stirring rod in the raw material processing tank first performs preliminary mixing of raw materials such as magnesium zirconium sand and silicon carbide. The auger roller crushes and reduces the particle size, and then the crushing roller performs fine grinding to control the particle size of the raw materials to 10-30μm with uniform particle size distribution. Experimental data shows that this system increases the specific surface area of ​​the raw materials, increases the contact area between powders during sintering, promotes the full development of solid-phase reaction, improves the internal density uniformity of the slide plate, stabilizes the porosity, and reduces it compared to traditional devices.

[0024] 2. Intelligent temperature control and gradient cooling improve sintering quality: The resistance wire heating structure achieves constant temperature control of 1600℃ in the sintering chamber, with temperature fluctuation ≤±5℃; during the cooling stage, cooling water circulation and cold air introduction form a gradient cooling, avoiding cracks in the slide plate due to thermal stress. The slide plate sintered by this device has a flexural strength of 45MPa, improved corrosion resistance, and extended service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0026] Figure 2This is a schematic diagram of the rear structure of this utility model;

[0027] Figure 3 This is a front sectional view of the present invention.

[0028] Figure 4 This is a schematic diagram of the crushing roller structure of this utility model;

[0029] Figure 5 This is a front cross-sectional view of Embodiment 2 of the present invention.

[0030] In the diagram: 1. Furnace outer shell; 2. Control box; 3. Operation panel; 4. Support leg; 5. Box door; 6. Sintering chamber; 7. Resistance wire heating structure; 8. First air inlet pipe; 9. Raw material processing tank; 10. Feed inlet; 11. Crushing chamber; 12. First servo motor; 13. Stirring rod; 14. First bevel gear; 15. Second bevel gear; 16. Screw roller; 17. Second servo motor; 18. First gear; 19. Second gear; 20. Crushing roller; 21. Water tank; 22. Pump; 23. Circulation pipe; 24. Cooling chamber; 25. Second air inlet pipe; 26. Cooling fan. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1

[0033] Please see Figure 1-4 This utility model provides a technical solution:

[0034] A low-carbon magnesium-zirconium-carbon converter sintering device includes a furnace shell 1, which has a box-type structure and a door 5 on the front side. A control box 2 is located at the bottom of the furnace shell 1, and an operation panel 3 is located on the front side of the control box 2. Four support legs 4 are located at the bottom of the control box 2. A sintering chamber 6 is located inside the furnace shell 1, and a resistance wire heating structure 7 is located on the outside of the sintering chamber 6. A first air inlet pipe 8 is located on the right side of the furnace shell 1. A raw material processing tank 9 is located above the furnace shell 1. A feed inlet 10 is located on both the left and right sides of the upper surface of the raw material processing tank 9. A crushing chamber 11 is connected to the bottom of the feed inlet 10, and a discharge outlet is located at the bottom of the crushing chamber 11. A stirring rod 13 is located inside the raw material processing tank 9, and the discharge outlet at the bottom of the raw material processing tank 9 is connected to the sintering chamber 6. Two crushing rollers 20 are located inside the discharge outlet at the bottom of the raw material processing tank 9.

[0035] A first servo motor 12 is fixedly installed on the top of the raw material processing tank 9. A stirring rod 13 is installed on the output end of the first servo motor 12 via a rotating rod. A first bevel gear 14 is installed above the rotating rod. A second bevel gear 15 is meshed on both sides of the first bevel gear 14. A screw conveyor roller 16 is installed on both sides of the second bevel gear 15 via a rotating rod. The first servo motor 12 drives the stirring rod 13 to rotate, stirring and mixing the raw materials such as magnesium zirconium sand and silicon carbide in the raw material processing tank 9. This ensures that the raw material powder is evenly distributed and the mixing uniformity is improved, providing homogeneous raw materials for subsequent sintering. The meshing of the first bevel gear 14 and the second bevel gear 15 drives the screw conveyor roller 16 to rotate, conveying the raw material to the crushing chamber 11 and initially crushing it. This reduces the particle size of the raw material to 50-100μm, laying the foundation for subsequent fine crushing.

[0036] A second servo motor 17 is fixedly installed on the outside of the bottom discharge port of the raw material processing tank 9, and a first gear 18 is connected to the output end of the second servo motor 17. A second gear 19 is meshed with the rear side of the first gear 18. A crushing roller 20 is connected to the right side of both the first gear 18 and the second gear 19. The crushing roller 20 forms a grinding structure for the raw material powder fed from the raw material processing tank 9. The second servo motor 17 drives the crushing roller 20 to rotate at high speed through the first gear 18 and the second gear 19 to perform secondary grinding of the raw material. The particle size can be accurately controlled within 10-30μm, which meets the requirements of low-carbon slide plate sintering for the fineness of the raw material. The two crushing rollers 20 rotate in opposite directions to form a shearing force, which finely grinds the raw material powder, so that the standard deviation of the powder particle size distribution is ≤5μm.

[0037] A water tank 21 is fixedly installed on the rear side of the furnace shell 1, and pumps 22 are installed on both the left and right sides of the water tank 21. Circulation pipes 23 are connected to the outside of the pumps 22. A cooling chamber 24 is installed on the outside of the sintering chamber 6, and circulation pipes 23 are connected to both the left and right sides of the cooling chamber 24. The water tank 21 delivers cooling water to the cooling chamber 24 through the pumps 22 and circulation pipes 23 to circulate and cool the sintering chamber 6, thereby stabilizing the cooling rate of the sintered slide plate and preventing cracks caused by rapid cooling.

[0038] Example 2

[0039] Please see Figure 5 This utility model provides a technical solution:

[0040] A second air inlet pipe 25 is provided on the left side of the sintering chamber 6, and the second air inlet pipe 25 connects to cold air from the outside. A cooling chamber 24 is provided on the outside of the sintering chamber 6, and heat dissipation vents are provided on both the left and right sides of the cooling chamber 24. A cooling fan 26 is provided in each of the heat dissipation vents. The second air inlet pipe 25 introduces cold air, which, together with the cooling chamber 24 and the cooling fan 26, enables rapid cooling of the sintering chamber 6, shortening the time from the sintering temperature to room temperature. At the same time, the cooling fan 26 makes the airflow velocity in the cooling chamber 24 reach 2m / s, improving the heat dissipation efficiency.

[0041] Working principle:

[0042] When using this utility model,

[0043] Raw material processing flow: Granular aggregate, co-ground powder, magnesia granules, and fused magnesia zirconium sand granules are fed into the raw material processing tank 9 in batches through the feed inlet 10. The first servo motor 12 drives the stirring rod 13 to mix the raw materials. At the same time, the first bevel gear 14 drives the second bevel gear 15 to rotate the auger roller 16 and push the raw materials to the crushing chamber 11. The second servo motor 17 drives the crushing roller 20 to finely grind the raw materials through the first gear 18 and the second gear 19. The powder falls into the sintering chamber 6 through the discharge port.

[0044] Sintering and cooling control:

[0045] The resistance wire heating structure 7 heats the sintering chamber 6 to 1600°C. The first air inlet pipe 8 introduces a protective gas, such as nitrogen, to prevent carbon oxidation. After sintering, the pump 22 starts and circulates cooling water through the cooling chamber 24, or the second air inlet pipe 25 introduces cold air. The cooling fan 26 accelerates heat dissipation to achieve gradient cooling.

[0046] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-carbon magnesium zirconium carbon converter slide plate sintering device, comprising a furnace shell (1), the furnace shell (1) having a box-type structure, and a door (5) provided on the front side of the furnace shell (1), a control box (2) provided at the bottom of the furnace shell (1), an operation panel (3) provided on the front side of the control box (2), and four support legs (4) provided at the bottom of the control box (2), a sintering chamber (6) provided inside the furnace shell (1), and a resistance wire heating structure (7) provided on the outside of the sintering chamber (6), characterized in that: The furnace shell (1) is provided with a first air inlet pipe (8) on the right side, and a raw material processing tank (9) is provided above the furnace shell (1). The raw material processing tank (9) is provided with inlets (10) on both the left and right sides of its upper surface. The bottom of the inlet (10) is connected to a crushing chamber (11), and the bottom of the crushing chamber (11) is provided with a discharge port. The raw material processing tank (9) is provided with a stirring rod (13), and the bottom discharge port of the raw material processing tank (9) is connected to the sintering chamber (6). The bottom discharge port of the raw material processing tank (9) is provided with two crushing rollers (20).

2. The low-carbon magnesium-zirconium-carbon converter slide plate sintering device according to claim 1, characterized in that: The first servo motor (12) is fixedly installed on the top of the raw material processing tank (9), and a stirring rod (13) is installed on the output end of the first servo motor (12) through a rotating rod, and a first bevel gear (14) is installed above the rotating rod.

3. The low-carbon magnesium-zirconium-carbon converter slide plate sintering device according to claim 2, characterized in that: The first bevel gear (14) is meshed with the second bevel gear (15) on both the left and right sides, and the second bevel gear (15) is connected to the auger roller (16) on both the left and right sides through the rotating rod.

4. The low-carbon magnesium-zirconium-carbon converter slide plate sintering device according to claim 1, characterized in that: A second servo motor (17) is fixedly installed on the outside of the bottom outlet of the raw material processing tank (9), and a first gear (18) is connected to the output end of the second servo motor (17), and a second gear (19) is meshed with the rear side of the first gear (18).

5. The low-carbon magnesium-zirconium-carbon converter slide plate sintering device according to claim 4, characterized in that: The first gear (18) and the second gear (19) are both connected to a crushing roller (20) on their right sides, and the crushing roller (20) forms a grinding structure for the raw material powder fed from the raw material processing tank (9).

6. The low-carbon magnesium-zirconium-carbon converter slide plate sintering device according to claim 1, characterized in that: A water tank (21) is fixedly installed on the rear side of the furnace shell (1), and pumps (22) are provided on both the left and right sides of the water tank (21). Circulation pipes (23) are connected to the outside of the pumps (22). A cooling chamber (24) is provided on the outside of the sintering chamber (6), and circulation pipes (23) are connected to the left and right sides of the cooling chamber (24).

7. The low-carbon magnesium-zirconium-carbon converter slide plate sintering device according to claim 1, characterized in that: The sintering chamber (6) is provided with a second air inlet pipe (25) on the left side, and the second air inlet pipe (25) is connected to cold air from the outside. The sintering chamber (6) is provided with a cooling chamber (24) on the outside, and the cooling chamber (24) is provided with heat dissipation vents on both the left and right sides, and each heat dissipation vent is provided with a cooling fan (26).

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