A molten steel refining apparatus

Abstract

The utility model discloses a molten steel refining equipment belongs to metallurgical technical field, including the refining bin, the solid setting feeder on the upper end one side of refining bin, the solid setting of other side unloading pipe, the solid setting of lower end middle part discharge pipe, the solid setting baffle in the inside middle part of refining bin, the embedded connection pipe of baffle with solenoid valve to the first refining area and second refining area of the distribution of upper and lower of separating refining bin, and the upper side is equipped with the gas outlet spray head in the second refining area, the utility model discloses a filter assembly is set, and the harmful gas of molten steel decarburization stage is formed, and the filter box linkage suction pipe forms the negative pressure environment with the help of the suction fan effect, and the efficient import filter box in suction port and suction pipe. Through the interception of coarse filter plate big particle dust, the capture of fine filter plate small impurities, the purification of adsorption filter plate harmful gas component, the barrier of demisting filter plate alkali mist and water mist, the gas standard discharge is realized through multilayer gradient purification, and the atmospheric pollution caused by harmful gas direct drainage is avoided from the source.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical technology, specifically relating to a steel refining equipment. Background Technology

[0002] In modern steel production, refining molten steel is one of the key steps in improving product quality. Refining equipment is used to remove excess impurities from molten steel and adjust its chemical composition to meet the performance requirements of different types of steel.

[0003] The existing steel refining equipment is not equipped with a waste gas treatment system. The harmful gases generated during the refining process are directly emitted, causing serious pollution to the atmospheric environment. In addition, the stirring mechanism can only achieve unidirectional operation, resulting in uneven mixing of molten steel and affecting the refining effect. At the same time, the heat preservation performance of the refining tank is poor, and the molten steel dissipates heat quickly. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a steel refining equipment that features the ability to filter waste gas, improve the stirring effect of molten steel, and provide high insulation performance of the refining tank.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel refining equipment, including a refining bin, a feeding hopper fixed on one side of the upper end of the refining bin, a feeding pipe fixed on the other side, a discharge pipe fixed in the middle of the lower end, a partition fixed in the middle of the interior of the refining bin, a connecting pipe with a solenoid valve embedded in the partition, and the refining bin is divided into a first refining zone and a second refining zone distributed vertically, an air outlet nozzle is arranged on the upper side of the second refining zone, the air outlet nozzle is connected to an external air supply device through an air inlet pipe, a stirring assembly is arranged in both the first refining zone and the second refining zone, and a filter assembly is installed on one side of the refining bin; The filtration assembly includes a filter box, which is provided on one side of the refining chamber. An air intake pipe is fixed on one side of the upper end of the filter box, with one end of the air intake pipe extending into the second refining zone and having several air intake ports at the end. A blower is connected to the lower side of one end of the filter box through a pipe. Inside the filter box, a coarse filter plate, a fine filter plate, an adsorption filter plate, and a demisting filter plate are arranged sequentially along the airflow direction.

[0006] Preferably, the filter assembly further includes a mounting plate, which is detachably mounted on one side of the front end of the filter box. The two are locked together by fixing bolts and corresponding fixing holes. The filter box has mounting slots that are compatible with coarse filter plates, fine filter plates, adsorption filter plates and demisting filter plates. The filter plates are fixed by inserting them into the mounting slots.

[0007] Preferably, the inner wall of the refining chamber adopts a three-layer composite structure, consisting of an outer heat-insulating layer, a heat-insulating buffer layer, and a fire-resistant layer from the outside to the inside.

[0008] Preferably, the coarse filter plate is made of silicon carbide ceramic material, the adsorption filter plate is made of modified activated carbon composite material, and the demisting filter plate is made of polytetrafluoroethylene corrugated structure.

[0009] Preferably, the stirring assembly includes a pair of rotating shafts, with two rotating shafts rotatably connected in both the first refining zone and the second refining zone. Spiral blades are fixed on the rotating shafts, and a driven gear is fixedly connected to the front end of the rotating shaft. A protective box is fixedly installed at the front end of the refining chamber corresponding to the driven gear. A motor is assembled inside the protective box, and a driving gear that meshes with the driven gear is fixedly installed at the output end of the motor.

[0010] Preferably, the upper end of the protective box is detachably connected to the maintenance door by bolts, and the spiral blades on the two rotating shafts are arranged in an alternating pattern to form a bidirectional convection stirring structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by setting up a filtration assembly, allows harmful gases generated during the decarburization stage of molten steel to be efficiently introduced into the filtration box through the suction port and suction pipe, creating a negative pressure environment with the help of a suction fan. The coarse filter plate intercepts large dust particles, the fine filter plate captures fine impurities, the adsorption filter plate purifies harmful gas components, and the demisting filter plate blocks alkaline mist and water mist. Through multi-layered gradient purification, the gas achieves compliant emissions, avoiding air pollution caused by direct discharge of harmful gases at the source.

[0012] 2. By setting up a stirring component, when the molten steel is being refined in the two refining zones, the motor is turned on to drive the drive gear to rotate. The drive gear drives the two rotating shafts to rotate synchronously through the driven gear. The spiral blades on the rotating shafts rotate in opposite directions, forming a bidirectional convection stirring of the molten steel. This avoids uneven mixing of the molten steel with the refining agent and decarburizing gas, and significantly improves the stirring uniformity and refining effect. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a three-dimensional cross-sectional view of the refining bin of this utility model; Figure 3 This is a perspective view of the mounting plate of this utility model during installation; Figure 4 This is a sectional perspective view of the protective box of this utility model; In the diagram: 1. Refining bin; 2. Filter assembly; 21. Filter box; 22. Suction pipe; 23. Suction port; 24. Fan; 25. Coarse filter plate; 26. Fine filter plate; 27. Adsorption filter plate; 28. Demisting filter plate; 29. ​​Mounting plate; 210. Fixing bolt; 211. Fixing hole; 212. Mounting groove; 3. Agitator assembly; 31. Protective box; 32. Rotating shaft; 33. Spiral blade; 34. Driven gear; 35. Motor; 36. Drive gear; 4. Feed hopper; 5. Discharge pipe; 6. Air inlet pipe; 7. Air outlet nozzle; 8. First refining zone; 9. Second refining zone; 10. Partition; 11. Connecting pipe; 12. Discharge pipe; 13. Insulation outer layer; 14. Heat insulation buffer layer; 15. Refractory layer. Detailed Implementation

[0014] 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. Example

[0015] Please see Figure 1-4 The present invention provides the following technical solution: a steel refining equipment, including a refining bin 1, a feeding hopper 4 fixed on one side of the upper end of the refining bin 1, a feeding pipe 5 fixed on the other side, a discharging pipe 12 fixed in the middle of the lower end, a partition 10 fixed in the middle of the interior of the refining bin 1, a connecting pipe 11 with a solenoid valve embedded in the partition 10, and the refining bin 1 is divided into a first refining zone 8 and a second refining zone 9 distributed vertically. An air outlet nozzle 7 is arranged on the upper side of the second refining zone 9, and the air outlet nozzle 7 is connected to an external air supply device through an air inlet pipe 6. A stirring assembly 3 is configured in both the first refining zone 8 and the second refining zone 9, and a filter assembly 2 is installed on one side of the refining bin 1. The filter assembly 2 includes a filter box 21. The filter box 21 is provided on one side of the refining chamber 1. An air suction pipe 22 is fixed on one side of the upper end of the filter box 21. One end of the air suction pipe 22 extends into the second refining zone 9, and several air suction ports 23 are provided at the end. The lower side of one end of the filter box 21 is connected to a suction fan 24 through a pipe. Inside the filter box 21, a coarse filter plate 25, a fine filter plate 26, an adsorption filter plate 27, and a demisting filter plate 28 are arranged in sequence along the airflow direction.

[0016] Specifically, the filter assembly 2 also includes a mounting plate 29. The mounting plate 29 can be detachably mounted on one side of the front end of the filter box 21. The two are locked and fixed by fixing bolts 210 and corresponding fixing holes 211. The filter box 21 has a mounting groove 212 inside that is compatible with the coarse filter plate 25, fine filter plate 26, adsorption filter plate 27 and demisting filter plate 28. The filter plates are fixed by inserting them into the mounting groove 212.

[0017] By adopting the above technical solution, when maintaining the filter plates, simply unscrew the fixing bolts 210 from the fixing holes 211 to remove the mounting plate 29 at the front end of the filter box 21, and then remove each filter plate from the corresponding mounting slot 212, thus realizing convenient disassembly and replacement of the filter plates.

[0018] Specifically, the inner wall of the refining chamber 1 adopts a three-layer composite structure, consisting of an outer heat-insulating layer 13, a heat-insulating buffer layer 14, and a fire-resistant layer 15 from the outside to the inside.

[0019] By adopting the above technical solution, the inner wall of the refining tank 1 adopts a multi-layer protective structure. The refractory layer 15 directly resists the erosion of molten steel, and the heat insulation buffer layer 14 and the heat insulation outer layer 13 work together to block heat loss, effectively slowing down the cooling rate of molten steel and ensuring the temperature stability of the refining process.

[0020] Specifically, the coarse filter plate 25 is made of silicon carbide ceramic material, the adsorption filter plate 27 is made of modified activated carbon composite material, and the demisting filter plate 28 is made of polytetrafluoroethylene corrugated structure.

[0021] By adopting the above technical solutions, the silicon carbide ceramic filter plate is temperature resistant and impact resistant, the modified activated carbon composite filter plate efficiently adsorbs harmful gases, and the polytetrafluoroethylene corrugated filter plate is anti-fogging and corrosion resistant, adaptable to the characteristics of waste gas, and has a good purification effect.

[0022] In this embodiment, molten steel is fed into the first refining zone 8 of the refining chamber 1 through the feed hopper 4. Simultaneously, refining powder is fed into the zone through the discharge pipe 5 to achieve desulfurization and dephosphorization treatment of the molten steel. Then, the solenoid valve of the connecting pipe 11 is opened, and the molten steel flows into the second refining zone 9 through the connecting pipe 11. The air inlet pipe 6 injects decarburization gas into the zone to complete the decarburization process. The molten steel that has passed the refining process is discharged through the discharge pipe 12.

[0023] Harmful gases generated during the decarburization process of molten steel are introduced into the filter box 21 through the suction fan 24, which creates negative pressure in the suction pipe 22. The gases are then introduced into the filter box 21 through the suction port 23 and the suction pipe 22. The coarse filter plate 25 intercepts large dust particles, the fine filter plate 26 captures small impurities, the adsorption filter plate 27 removes harmful gas components, and the demisting filter plate 28 intercepts alkaline mist and water mist in the exhaust gas. After multi-layer purification, the gases are discharged in compliance with standards, avoiding direct discharge of harmful gases that pollute the air.

[0024] When maintaining the filter plates, simply unscrew the fixing bolts 210 from the fixing holes 211 to remove the mounting plate 29 at the front end of the filter box 21, and then remove each filter plate from the corresponding mounting slot 212, thus achieving convenient disassembly and replacement of the filter plates.

[0025] The inner wall of the refining chamber 1 adopts a multi-layer protective structure. The refractory layer 15 directly resists the erosion of molten steel, and the heat insulation buffer layer 14 and the heat insulation outer layer 13 work together to block heat loss, effectively slowing down the cooling rate of molten steel and ensuring the temperature stability of the refining process. Example

[0026] The difference between this embodiment and embodiment 1 is that the stirring assembly 3 includes a pair of rotating shafts 32. Two rotating shafts 32 are rotatably connected in both the first refining zone 8 and the second refining zone 9. Spiral blades 33 are fixed on the rotating shafts 32. A driven gear 34 is fixedly connected to the front end of the rotating shafts 32. A protective box 31 is fixedly installed at the front end of the refining chamber 1 at the location corresponding to the driven gear 34. A motor 35 is assembled inside the protective box 31. A drive gear 36 that meshes with the driven gear 34 is fixedly installed at the output end of the motor 35.

[0027] By adopting the above technical solution, when the molten steel is refined in the two refining zones, the motor 35 is turned on to drive the drive gear 36 to rotate. The drive gear 36 drives the two rotating shafts 32 to rotate synchronously through the driven gear 34. The spiral blades 33 on the rotating shafts 32 rotate in opposite directions, forming bidirectional convection stirring of the molten steel, avoiding uneven mixing of molten steel with refining agent and decarburizing gas, and significantly improving the stirring uniformity and refining effect.

[0028] Specifically, the upper end of the protective box 31 is detachably connected to the maintenance door by bolts, and the spiral blades 33 on the two rotating shafts 32 are arranged in an alternating manner to form a bidirectional convection mixing structure.

[0029] By adopting the above technical solution, the maintenance door is designed to be detachable, which facilitates the maintenance and repair of the stirring component 3; the spiral blades 33 are arranged in an alternating pattern to form bidirectional convection, which enhances the mixing of molten steel with refining agent and gas, and improves the uniformity of stirring and refining efficiency.

[0030] In this embodiment, when the molten steel is being refined in the two refining zones, the motor 35 is turned on to drive the drive gear 36 to rotate. The drive gear 36 drives the two rotating shafts 32 to rotate synchronously through the driven gear 34. The spiral blades 33 on the rotating shafts 32 rotate in opposite directions, forming a bidirectional convection stirring of the molten steel. This avoids uneven mixing of the molten steel with the refining agent and decarburizing gas, and significantly improves the uniformity of stirring and the refining effect.

[0031] The working principle and usage process of this utility model: When using the steel refining equipment, the device is installed in a suitable position. The molten steel is injected into the first refining zone 8 of the refining chamber 1 through the feed hopper 4. At the same time, the feeding pipe 5 feeds refining powder into the zone to achieve desulfurization and dephosphorization treatment of the molten steel. Then, the solenoid valve of the connecting pipe 11 is opened, and the molten steel flows into the second refining zone 9 through the connecting pipe 11. The air inlet pipe 6 injects decarburization gas into the zone to complete the decarburization process. The molten steel that has passed the refining process is discharged through the discharge pipe 12.

[0032] Harmful gases generated during the decarburization process of molten steel are introduced into the filter box 21 through the suction fan 24, which creates negative pressure in the suction pipe 22. The gases are then introduced into the filter box 21 through the suction port 23 and the suction pipe 22. The coarse filter plate 25 intercepts large dust particles, the fine filter plate 26 captures small impurities, the adsorption filter plate 27 removes harmful gas components, and the demisting filter plate 28 intercepts alkaline mist and water mist in the exhaust gas. After multi-layer purification, the gases are discharged in compliance with standards, avoiding direct discharge of harmful gases that pollute the air.

[0033] When maintaining the filter plates, simply unscrew the fixing bolts 210 from the fixing holes 211 to remove the mounting plate 29 at the front end of the filter box 21, and then remove each filter plate from the corresponding mounting slot 212, thus achieving convenient disassembly and replacement of the filter plates.

[0034] The inner wall of the refining chamber 1 adopts a multi-layer protective structure. The refractory layer 15 directly resists the erosion of molten steel, and the heat insulation buffer layer 14 and the heat insulation outer layer 13 work together to block heat loss, effectively slowing down the cooling rate of molten steel and ensuring the temperature stability of the refining process.

[0035] When the molten steel is being refined in the two refining zones, the motor 35 is turned on to drive the drive gear 36 to rotate. The drive gear 36 drives the two rotating shafts 32 to rotate synchronously through the driven gear 34. The spiral blades 33 on the rotating shafts 32 rotate in opposite directions, forming a bidirectional convection stirring of the molten steel. This avoids uneven mixing of the molten steel with the refining agent and decarburizing gas, and significantly improves the uniformity of stirring and the refining effect.

[0036] 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 steel refining apparatus, comprising a refining tank (1), characterized in that: The refining chamber (1) has a feeding hopper (4) fixed on one side of the upper end, a feeding pipe (5) fixed on the other side, and a discharge pipe (12) fixed in the middle of the lower end. A partition (10) is fixed in the middle of the interior of the refining chamber (1). A connecting pipe (11) with a solenoid valve is embedded in the partition (10), which divides the refining chamber (1) into a first refining zone (8) and a second refining zone (9) distributed vertically. An air outlet nozzle (7) is arranged on the upper side of the second refining zone (9). The air outlet nozzle (7) is connected to an external air supply device through an air inlet pipe (6). A stirring assembly (3) is configured in both the first refining zone (8) and the second refining zone (9). A filter assembly (2) is installed on one side of the refining chamber (1). The filter assembly (2) includes a filter box (21). The filter box (21) is provided on one side of the refining chamber (1). An air suction pipe (22) is fixed on one side of the upper end of the filter box (21). One end of the air suction pipe (22) extends into the second refining zone (9), and several air suction ports (23) are provided at the end. The lower side of one end of the filter box (21) is connected to a blower (24) through a pipe. The filter box (21) is arranged with a coarse filter plate (25), a fine filter plate (26), an adsorption filter plate (27), and a demisting filter plate (28) in sequence along the airflow direction.

2. A steel refining equipment according to claim 1, characterized in that: The filter assembly (2) also includes a mounting plate (29). The mounting plate (29) is detachably mounted on one side of the front end of the filter box (21). The two are locked and fixed by fixing bolts (210) and corresponding fixing holes (211). The filter box (21) has a mounting groove (212) that is compatible with the coarse filter plate (25), fine filter plate (26), adsorption filter plate (27) and demisting filter plate (28). The filter plates are fixed by inserting them into the mounting groove (212).

3. A steel refining equipment according to claim 2, characterized in that: The inner wall of the refining chamber (1) adopts a three-layer composite structure, which consists of an outer heat-insulating layer (13), a heat-insulating buffer layer (14), and a fire-resistant layer (15) from the outside to the inside.

4. A steel refining equipment according to claim 3, characterized in that: The coarse filter plate (25) is made of silicon carbide ceramic material, the adsorption filter plate (27) is made of modified activated carbon composite material, and the demisting filter plate (28) is made of polytetrafluoroethylene corrugated structure.

5. A steel refining equipment according to claim 1, characterized in that: The stirring assembly (3) includes a pair of rotating shafts (32). Two rotating shafts (32) are rotatably connected in both the first refining zone (8) and the second refining zone (9). Spiral blades (33) are fixed on the rotating shafts (32). A driven gear (34) is fixedly connected to the front end of the rotating shafts (32). A protective box (31) is fixedly installed at the front end of the refining chamber (1) at the location corresponding to the driven gear (34). A motor (35) is installed inside the protective box (31). A drive gear (36) that meshes with the driven gear (34) is fixedly installed at the output end of the motor (35).

6. A steel refining apparatus according to claim 5, characterized in that: The upper end of the protective box (31) is detachably connected to the maintenance door by bolts, and the spiral blades (33) on the two rotating shafts (32) are arranged in an alternating manner to form a bidirectional convection stirring structure.

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