Lcc steel smelting device and method

Abstract

The application relates to the technical field of LCC steel production equipment, in particular to a LCC steel smelting device and method. The device comprises a smelting device main body and a heat supply module. The heat supply module is used for recovering waste heat of smelting slag, and the heat recovered by the heat supply module is sent into the smelting device main body. After extrusion and separation of the auxiliary processing part, a plurality of fan-shaped slag stacks are formed, ventilation channels are formed between adjacent slag stacks, and external air passes through the ventilation channels and exchanges heat with the slag stacks. The smelting device main body is used for smelting LCC steel, the heat supply module is used for treating smelting slag, the heat in the smelting slag is recovered, the smelting of LCC steel is carried out through the recovered heat, and the waste of heat can be effectively reduced, and energy saving and environmental protection are achieved.

Description

Technical Field

[0001] This invention relates to the field of LCC steel production equipment technology, specifically to an LCC steel smelting apparatus and method. Background Technology

[0002] LCC is a type of steel used in cryogenic pressure vessels or valves, primarily for cryogenic valves and pressure-bearing components in industries such as petrochemicals and nuclear power.

[0003] The steel industry, as a typical high-energy-consuming and high-emission sector, generates a large amount of high-temperature slag (temperatures reaching 1400-1600℃) annually, with a calorific value equivalent to 60 kg of standard coal per ton of slag. By recovering waste heat from steelmaking slag and using this heat for LCC steel smelting, energy waste can be significantly reduced. Therefore, this application provides an LCC steel smelting apparatus and method of use, reducing heat loss from steelmaking slag in existing technologies and lowering production energy consumption. Summary of the Invention

[0004] To address the above problems, the present invention provides an LCC steel smelting apparatus and method.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an LCC steel smelting device, including a smelting device body and a heating module, wherein the heating module is used to recover waste heat from the slag of steelmaking, and the heat recovered by the heating module is sent into the smelting device body.

[0006] The heating module includes a fan, a waste heat recovery device, and a heating pipe. The heating pipe is connected between the waste heat recovery device and the main body of the smelting device. The fan is used to ventilate the inside of the waste heat recovery device. The waste heat recovery device includes a recovery boiler with a rotating base plate and an auxiliary processing section located on the upper side of the recovery boiler. Slag is added into the recovery boiler. After being squeezed and separated by the auxiliary processing section, the slag forms several fan-shaped slag piles. Ventilation channels are formed between adjacent slag piles. External air passes through the ventilation channels and exchanges heat with the slag piles.

[0007] As an optimization, the auxiliary processing part includes a downward-opening pressure cap and several cutters arranged in a circumferential array. The pressure cap is equipped with a drive motor and a drive gear ring. The cutters are equipped with a vertical rack. The drive gear ring is fitted onto the outside of the rack. The drive motor is used to drive the drive gear ring to rotate.

[0008] When the auxiliary processing section moves downward, it can compact the slag, spreading it evenly at the bottom of the recovery boiler. Then, the cutter is pushed downward to cut the slag.

[0009] As an optimization, a first telescopic rod is connected to the upper side of the auxiliary processing part, an air intake pipe is connected to the axial direction of the auxiliary processing part, an auxiliary telescopic rod is arranged at the axial center of the air intake pipe, an auxiliary pressure plate is connected to the extended end of the auxiliary telescopic rod, and the auxiliary pressure plate is located and fits against the inner bottom surface of the auxiliary processing part.

[0010] When the auxiliary pressure plate is pushed downward, it squeezes the slag at the center of the boiler shaft outward, so that the slag at the center of the boiler shaft is lower than the height of the slag on the outside, and the end of the air inlet pipe and the ventilation channel are connected.

[0011] As an optimization, the heating pipe is connected to the side of the recovery boiler, and an auxiliary push rod is provided on the lower side of the heating pipe. When the auxiliary push rod extends into the interior of the recovery boiler, it can adjust the ventilation channel, thereby expanding the ventilation channel and squeezing the slag in the ventilation channel into the adjacent ventilation channel where heat exchange has been completed.

[0012] As an optimization, the base plate can be detached from the recovery boiler downwards. A support plate is provided at the bottom of the recovery boiler. Several second telescopic rods are arranged on the lower side of the support plate. A rotary motor is arranged on the support plate, and the output shaft of the rotary motor is fixedly connected to the base plate.

[0013] As an optimization, the bottom surface of the cap is recessed to form several receiving grooves, the cutter is disposed in the receiving grooves, and the receiving grooves are equipped with several guide rods, which are slidably connected to the cutter.

[0014] As an optimization, it also includes an upper fixed seat and a lower fixed seat. The auxiliary processing part is connected to the upper fixed seat, and the base plate is connected to the lower fixed seat. The auxiliary processing part is coaxially arranged with the recovery boiler.

[0015] The method of use, including any of the LCC steel smelting apparatuses described above, specifically includes the following steps:

[0016] The bottom plate is lifted into the recovery boiler, and the smelting slag is added into the recovery boiler. The slag is then pressed down by the auxiliary treatment section to make the slag spread evenly on the bottom plate.

[0017] The auxiliary pressure plate is pressed down to create an air intake space on the lower side of the air intake pipe. Then, the slag is cut by a cutter. The cutter is retracted to create multiple ventilation channels inside the slag.

[0018] External air enters multiple ventilation channels through the air inlet pipe. By rotating the base plate, the multiple ventilation channels are arranged one by one opposite the heating pipe to achieve efficient heat exchange with the slag. The high-temperature hot air is sent into the main body of the smelting unit through the heating pipe.

[0019] This solution provides an LCC steel smelting apparatus and method, which has the following advantages:

[0020] This application involves smelting LCC steel through the main body of the smelting unit, and recovering the heat from the steelmaking slag after processing it through the heating module. The recovered heat is then used for smelting LCC steel, which can effectively reduce heat waste and save energy and protect the environment.

[0021] In the process of processing steelmaking slag, the slag is first spread into a cake shape and evenly distributed inside the recovery boiler. Then, the slag is cut into multiple slag piles by a cutter. Ventilation channels are formed between adjacent slag piles, allowing air to pass through the high-temperature slag and carry away the heat from the slag, thus achieving efficient utilization of heat. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the heating module of the present invention from the isometric perspective.

[0023] Figure 2 This is a schematic diagram of the heating module of the present invention.

[0024] Figure 3 For the present invention Figure 2 A schematic diagram of the AA cross-section structure.

[0025] Figure 4 For the present invention Figure 2 A schematic diagram of the slag state in an AA-section structure.

[0026] Figure 5 For the present invention Figure 3 A schematic diagram of the BB cross-section structure.

[0027] Figure 6 This is a schematic diagram of the bottom axial side of the heating module of the present invention.

[0028] Figure 7 This is a schematic diagram of the heating module of the present invention from the left.

[0029] Figure 8 For the present invention Figure 7 A schematic diagram of the CC cross-section structure.

[0030] Figure 9 This is a bottom axial view of the auxiliary processing section of the heating module of the present invention.

[0031] The components are: 1. heating pipe, 2. base plate, 3. recovery boiler, 4. slag pile, 5. pressure cover, 6. cutter, 7. drive motor, 8. drive gear ring, 9. rack and pinion, 10. first telescopic rod, 11. air inlet pipe, 12. auxiliary telescopic rod, 13. auxiliary pressure plate, 14. auxiliary push rod, 15. support plate, 16. second telescopic rod, 17. rotary motor, 18. receiving groove, and 19. guide rod. Detailed Implementation

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] like Figures 1-9 As shown, an LCC steel smelting device includes a smelting device body and a heating module. The heating module is used to recover waste heat from the slag of steelmaking, and the heat recovered by the heating module is sent into the smelting device body.

[0034] The heating module includes a fan, a waste heat recovery device, and a heating pipe 1. The heating pipe 1 is connected between the waste heat recovery device and the main body of the smelting device. The fan is used to ventilate the inside of the waste heat recovery device. The waste heat recovery device includes a recovery boiler 3 rotatably mounted on a base plate 2 and an auxiliary processing section mounted on the upper side of the recovery boiler 3. Slag is added into the recovery boiler 3. After being squeezed and separated by the auxiliary processing section, the slag forms several fan-shaped slag piles 4. A ventilation channel is formed between adjacent slag piles 4. External air passes through the ventilation channel and exchanges heat with the slag piles 4.

[0035] The slag is high-temperature slag. After the air comes into contact with the slag, it exchanges heat to obtain high-temperature hot air. The high-temperature hot air is introduced into the main body of the smelting unit through the heating pipe 1.

[0036] The auxiliary processing section can flatten and crush the slag, reducing the volume of slag particles and improving heat exchange efficiency. The auxiliary processing section can also cut and separate the slag. One end of the ventilation channel is connected to the axis of the auxiliary processing section, and the outer end of the ventilation channel is connected to the side wall of the recovery boiler 3.

[0037] like Figure 3 As shown, the auxiliary processing part includes a downward-opening pressure cap 5 and a plurality of cutters 6 arranged in a circumferential array. The pressure cap 5 is equipped with a drive motor 7 and a drive gear ring 8. The cutter 6 is equipped with a vertical rack 9. The drive gear ring 8 is fitted on the outside of the rack 9. The drive motor 7 is used to drive the drive gear ring 8 to rotate.

[0038] When the auxiliary processing section moves downward, it can compact the slag, spreading it evenly at the bottom of the recovery boiler 3. Then, the cutter 6 is pushed downward to cut the slag.

[0039] The outer side of the drive gear ring 8 is provided with connecting teeth, and the output shaft of the drive motor 7 is equipped with a drive gear. The drive gear meshes with the drive gear ring 8. The inner side of the drive gear ring 8 and the rack rod 9 are provided with corresponding connecting threads. The drive gear ring 8 is equivalent to a nut sleeved on the outside of the rack rod 9. When the drive gear ring 8 is rotated, the cutter 6 can be pulled up or pushed down.

[0040] When the cap 5 is pressed down, the cutter 6 is retracted into the inside of the cap 5.

[0041] like Figure 3 As shown, a first telescopic rod 10 is connected to the upper side of the auxiliary processing part, an air intake pipe 11 is connected to the axial direction of the auxiliary processing part, an auxiliary telescopic rod 12 is arranged on the axial direction of the air intake pipe 11, an auxiliary pressure plate 13 is connected to the extended end of the auxiliary telescopic rod 12, and the auxiliary pressure plate 13 is located on the inner bottom surface of the auxiliary processing part.

[0042] When the auxiliary pressure plate 13 is pushed downward, it squeezes the slag at the center of the recovery boiler 3 outward, so that the slag at the center of the recovery boiler 3 is lower than the height of the outer slag, and the end of the air inlet pipe 11 is connected to the ventilation channel.

[0043] The air intake pipe 11 is connected to the fan, and the auxiliary telescopic rod 12 is used to press the auxiliary pressure plate 13 downward.

[0044] like Figure 3 As shown, the heating pipe 1 is connected to the side of the recovery boiler 3. An auxiliary push rod 14 is arranged on the lower side of the heating pipe 1. When the auxiliary push rod 14 extends into the interior of the recovery boiler 3, it can adjust the ventilation channel to expand the ventilation channel. The slag in the ventilation channel is squeezed into the adjacent ventilation channel that has completed heat exchange.

[0045] The base plate 2 can be detached from the recovery boiler 3. The bottom of the recovery boiler 3 is provided with a support plate 15. Several second telescopic rods 16 are arranged on the lower side of the support plate 15. The support plate 15 is equipped with a rotary motor 17. The output shaft of the rotary motor 17 is fixedly connected to the base plate 2.

[0046] The auxiliary pusher 14 includes a slag pusher plate with a wedge-shaped end and an electric telescopic rod. The inclined surface of the wedge-shaped end faces the adjacent ventilation channel that has completed heat exchange. When the slag pusher plate moves into the ventilation channel, it can push the slag in the ventilation channel to one side. The position of the slag is moved, exposing the slag inside that has not undergone heat exchange, thereby improving the heat exchange effect. At the same time, the ventilation channel is expanded to promote the exhaust of hot air.

[0047] like Figure 3As shown, the bottom surface of the pressure cap 5 is recessed to form several receiving grooves 18, the cutter 6 is disposed in the receiving grooves 18, and the receiving grooves 18 are provided with several guide rods 19, which are slidably connected to the cutter 6.

[0048] It also includes an upper fixed seat and a lower fixed seat. The auxiliary processing part is connected to the upper fixed seat, and the base plate 2 is connected to the lower fixed seat. The auxiliary processing part is coaxially arranged with the recovery boiler 3.

[0049] The method of use, including any of the LCC steel smelting apparatuses described above, specifically includes the following steps:

[0050] The bottom plate 2 is lifted upward into the inside of the recovery boiler 3, and the smelting slag is added into the inside of the recovery boiler 3. The slag is then pressed down by the auxiliary treatment section to make the slag spread evenly on the bottom plate 2.

[0051] The auxiliary telescopic rod 12 extends and the auxiliary pressure plate 13 presses down, so that an air intake space is formed on the lower side of the air intake pipe 11. At the same time, the drive motor 7 runs and drives multiple cutters 6 to press down through the drive gear ring 8. The cutters 6 cut the slag. The cutters 6 retract, so that multiple ventilation channels are formed inside the slag.

[0052] The upper recess of the cutter 6 forms a receiving space. When the cutter 6 is retracted upwards, the drive gear and drive gear ring 8 are located within the receiving space. The cutter 6 includes at least one wide cutter 6. The ventilation channel formed by the ordinary cutter 6 is relatively narrow and needs to be adjusted by the auxiliary push rod 14. The ventilation channel after the wide cutter 6 cuts the slag can be directly used for ventilation and heat exchange.

[0053] External air enters the interior of multiple ventilation channels through the air inlet pipe 11. As the bottom plate 2 rotates, the bottom plate 2 drives the slag to rotate, so that the multiple ventilation channels are arranged opposite to the heating pipe 1 one by one, so as to carry out efficient heat exchange on the slag. The high-temperature hot air is sent into the interior of the smelting unit through the heating pipe 1.

[0054] The base plate 2 first drives the ventilation channel formed by the wide cutter 6 to rotate to the inside of the heating pipe 1, so that the air inside the recovery boiler 3 flows out through the ventilation channel;

[0055] As the base plate 2 continues to rotate, it drives the next ventilation channel to rotate to the inside of the heating pipe 1. The auxiliary push rod 14 extends and pushes the slag in the ventilation channel to move towards the ventilation channel that has completed heat exchange, thereby expanding the ventilation channel and improving the ventilation and heat exchange effect.

[0056] The above-described specific embodiments are merely specific examples of the present invention. The patent protection scope of the present invention includes, but is not limited to, the product form and style of the above-described specific embodiments. Any LCC steel smelting apparatus and method that conforms to the claims of the present invention, and any appropriate changes or modifications made thereto by those skilled in the art, shall fall within the patent protection scope of the present invention.

Claims

1. An LCC steel smelting apparatus, comprising a smelting apparatus body and a heating module, characterized in that: The heating module is used to recover waste heat from the slag of steelmaking, and the heat recovered by the heating module is sent into the main body of the smelting unit. The heating module includes a fan, a waste heat recovery device and a heating pipe (1). The heating pipe (1) is connected between the waste heat recovery device and the main body of the smelting device. The fan is used to ventilate the inside of the waste heat recovery device. The waste heat recovery device includes a recovery boiler (3) with a rotating base plate (2) and an auxiliary processing part set on the upper side of the recovery boiler (3). Slag is added into the recovery boiler (3). After being squeezed and separated by the auxiliary processing part, the slag forms several fan-shaped slag piles (4). A ventilation channel is formed between adjacent slag piles (4). External air passes through the ventilation channel and exchanges heat with the slag piles (4).

2. The LCC steel smelting apparatus according to claim 1, characterized in that: The auxiliary processing part includes a downward-opening pressure cap (5) and a plurality of cutters (6) arranged in a circumferential array. The pressure cap (5) is equipped with a drive motor (7) and a drive gear ring (8). The cutter (6) is equipped with a vertical rack (9). The drive gear ring (8) is fitted on the outside of the rack (9). The drive motor (7) is used to drive the drive gear ring (8) to rotate. When the auxiliary processing section moves downward, it can compact the slag, so that the slag is spread flat on the bottom of the recovery boiler (3), and then the cutter (6) is pushed downward to cut the slag.

3. The LCC steel smelting apparatus according to claim 1, characterized in that: The upper side of the auxiliary processing part is connected to a first telescopic rod (10), the axial direction of the auxiliary processing part is connected to an air intake pipe (11), the axial direction of the air intake pipe (11) is configured with an auxiliary telescopic rod (12), the extended end of the auxiliary telescopic rod (12) is connected to an auxiliary pressure plate (13), and the auxiliary pressure plate (13) is located on the inner bottom surface of the auxiliary processing part. When the auxiliary pressure plate (13) is pushed down, it squeezes the slag at the center of the recovery boiler (3) outward, so that the slag at the center of the recovery boiler (3) is lower than the height of the outer slag, and the end of the air inlet pipe (11) is connected to the ventilation channel.

4. An LCC steel smelting apparatus according to claim 1, characterized in that: The heating pipe (1) is connected to the side of the recovery boiler (3). An auxiliary push rod (14) is provided on the lower side of the heating pipe (1). When the auxiliary push rod (14) extends into the interior of the recovery boiler (3), it can adjust the ventilation channel to expand the ventilation channel. The slag in the ventilation channel is squeezed into the adjacent ventilation channel that has completed heat exchange.

5. An LCC steel smelting apparatus according to claim 1, characterized in that: The bottom plate (2) can be detached from the recovery boiler (3) downwards. The bottom of the recovery boiler (3) is provided with a support plate (15). Several second telescopic rods (16) are arranged on the lower side of the support plate (15). The support plate (15) is equipped with a rotary motor (17). The output shaft of the rotary motor (17) is fixedly connected to the bottom plate (2).

6. An LCC steel smelting apparatus according to claim 2, characterized in that: The bottom surface of the pressure cap (5) is recessed to form several receiving grooves (18), and the cutter (6) is disposed in the receiving grooves (18). The receiving grooves (18) are provided with several guide rods (19), and the guide rods (19) are slidably connected to the cutter (6).

7. An LCC steel smelting apparatus according to claim 1, characterized in that: It also includes an upper fixed seat and a lower fixed seat. The auxiliary processing part is connected to the upper fixed seat, and the base plate (2) is connected to the lower fixed seat. The auxiliary processing part is coaxially arranged with the recovery boiler (3).

8. The method of use, characterized in that: The LCC steel smelting apparatus according to any one of claims 1-7 specifically includes the following steps: The bottom plate (2) is lifted upward into the inside of the recovery boiler (3), and the smelting slag is added into the inside of the recovery boiler (3). The slag is then pressed down by the auxiliary treatment section to make it spread evenly on the bottom plate (2). The auxiliary pressure plate (13) is pressed down to form an air intake space on the lower side of the air intake pipe (11). The slag is then cut by the cutter (6). The cutter (6) is retracted to form multiple ventilation channels inside the slag. External air enters into multiple ventilation channels through the air inlet pipe (11). By rotating the bottom plate (2), multiple ventilation channels are arranged opposite to the heating pipe (1) to efficiently exchange heat with the slag. High-temperature hot air is sent into the main body of the smelting device through the heating pipe (1).

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