LCC steel smelting device and method

Abstract

The invention relates to the technical field of LCC steel production equipment, in particular to an LCC steel smelting device and method. Comprising a smelting device body and a heat supply module, the heat supply module is used for conducting waste heat recovery on steelmaking slag, and heat recovered by the heat supply module is fed into the smelting device body. A plurality of fan-shaped furnace slag piles are formed after extrusion and separation of the auxiliary treatment part, a ventilation channel is formed between every two adjacent furnace slag piles, and external air passes through the ventilation channels and exchanges heat with the furnace slag piles. According to the LCC steel smelting device, smelting operation of LCC steel is conducted through the smelting device body, after the steelmaking slag is treated through the heat supply module, heat in the steelmaking slag is recycled, LCC steel smelting is conducted through the recycled heat, heat waste can be effectively reduced, energy is saved, and the environment is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of LCC steel production equipment, and in particular to an LCC steel smelting device and method. Background Art

[0002] LCC is steel for cryogenic pressure vessels or cryogenic valves, and is mainly used for cryogenic valves and pressure-bearing components in the petrochemical, nuclear power and other industries.

[0003] The steel industry, a typical industry with high energy consumption and high emissions, produces large quantities of high-temperature slag annually (temperatures can reach 1400-1600°C), with a calorific value equivalent to 60kg of standard coal per ton of slag. By recovering waste heat from steelmaking slag and using this heat for LCC steelmaking, energy waste can be significantly reduced. Therefore, this application provides an LCC steelmaking device and method for use, which reduces heat loss from steelmaking slag in the prior art and lowers production energy consumption. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides an LCC steel smelting device and method.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an LCC steel smelting device, comprising a smelting device body and a heating module, wherein the heating module is used to recover waste heat from steelmaking slag, and the heat recovered by the heating module is fed into the smelting device body; 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 interior of the waste heat recovery device. The waste heat recovery device includes a recovery boiler with a rotatable bottom plate and an auxiliary processing part arranged on the upper side of the recovery boiler. Slag is added to the recovery boiler. After being squeezed and separated by the auxiliary processing part, the slag forms a plurality of 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.

[0006] As an optimization, the auxiliary processing part includes a downwardly opening pressure cover and a plurality of cutters arranged in a circumferential array. A drive motor and a drive gear ring are provided inside the pressure cover. The cutters are equipped with a vertical rack rod. The drive gear ring is fitted on the outer side of the rack rod. The drive motor is used to drive the drive gear ring to rotate. When the auxiliary processing part is downward, the slag can be compacted to make the slag spread flat on the bottom of the recovery boiler, and then the cutter is pushed downward to cut the slag.

[0007] 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 configured at the axial center of the air intake pipe, and an auxiliary pressure plate is connected to the extended end of the auxiliary telescopic rod, and the auxiliary pressure plate is located on the inner bottom surface of the auxiliary processing part; When the auxiliary pressing plate is pushed downward, the slag at the axis of the recovery boiler is squeezed outward, so that the slag at the axis of the recovery boiler is lower than the height of the slag outside, so that the air inlet pipe and the end of the ventilation channel are connected.

[0008] As an optimization, the heating pipe is connected to the side of the recovery boiler, and an auxiliary push rod is arranged on the lower side of the heating pipe. When the auxiliary push rod is extended into the interior of the recovery boiler, the ventilation channel can be adjusted to expand the ventilation channel, and the slag in the ventilation channel is squeezed into the adjacent ventilation channel where heat exchange has been completed.

[0009] As an optimization, the bottom plate can be disengaged from the recovery boiler downwards, a support plate is provided at the bottom of the recovery boiler, a plurality of second telescopic rods are arranged on the lower side of the support plate, the support plate is provided with a rotating motor, and the output shaft of the rotating motor is fixedly connected to the bottom plate.

[0010] As an optimization, the bottom surface of the pressure cover is recessed to form a plurality of receiving grooves, the cutter is arranged in the receiving grooves, and the receiving grooves are provided with a plurality of guide rods, which are slidably connected to the cutter.

[0011] As an optimization, it further includes an upper fixing seat and a lower fixing seat, the auxiliary processing part is connected to the upper fixing seat, the bottom plate is connected to the lower fixing seat, and the auxiliary processing part is arranged coaxially with the recovery boiler.

[0012] The method of use includes any one of the above-mentioned LCC steel smelting devices, specifically comprising the following steps: Lift the bottom plate upwards to the inside of the recovery boiler, add the smelting slag into the recovery boiler, and press it down through the auxiliary processing part to make the slag evenly spread on the bottom plate; The auxiliary pressing plate presses down to form an air intake space on the lower side of the air intake pipe, and then the slag is cut by the cutter. The cutter is retracted to form multiple ventilation channels inside the slag. External air enters into multiple ventilation channels through the air inlet pipe, and rotates through the bottom plate, so that multiple ventilation channels are arranged opposite to the heating pipes one by one, so as to efficiently exchange heat with the slag, and high-temperature hot air is sent into the main body of the smelting device through the heating pipes.

[0013] This solution provides an LCC steel smelting device and method, which has the following benefits: The present application uses a smelting device to perform LCC steel smelting operations, processes steelmaking slag through a heating module, recovers heat from the steelmaking slag, and uses the recovered heat to smelt LCC steel, which can effectively reduce heat waste and save energy and protect the environment. During the processing of steelmaking slag, the slag is first spread into a cake shape and evenly distributed inside the recovery boiler. The slag is then cut with a cutter to form multiple slag piles. Ventilation channels are formed between adjacent slag piles, allowing air to pass through the high-temperature slag and take away the heat of the slag, thereby achieving efficient use of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the axial side of the heating module of the present invention.

[0015] Figure 2 This is a schematic front view of the heating module of the present invention.

[0016] Figure 3 For the present invention Figure 2 AA cross-section structure diagram.

[0017] Figure 4 For the present invention Figure 2 Schematic diagram of AA cross-section structure slag state.

[0018] Figure 5 For the present invention Figure 3 Schematic diagram of the BB cross-section structure.

[0019] Figure 6 This is a schematic diagram of the bottom axial side of the heating module of the present invention.

[0020] Figure 7 It is a left side schematic diagram of the heating module of the present invention.

[0021] Figure 8 For the present invention Figure 7 Schematic diagram of the CC cross-section structure.

[0022] Figure 9 This is a bottom axial schematic diagram of the auxiliary processing part of the heating module of the present invention.

[0023] Among them, 1. heating pipe, 2. bottom plate, 3. recovery boiler, 4. slag pile, 5. pressure cover, 6. cutter, 7. drive motor, 8. drive gear ring, 9. rack rod, 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. rotating motor, 18. receiving groove, 19. guide rod. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] 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 steelmaking slag. The heat recovered by the heating module is fed into the smelting device body. 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 interior of the waste heat recovery device. The waste heat recovery device includes a recovery boiler 3 rotatably arranged on a bottom plate 2 and an auxiliary processing part arranged on the upper side of the recovery boiler 3. Slag is added to the recovery boiler 3. After being squeezed and separated by the auxiliary processing part, the slag forms a plurality of fan-shaped slag piles 4. Ventilation channels are formed between adjacent slag piles 4. External air passes through the ventilation channels and exchanges heat with the slag piles 4.

[0026] The slag is high-temperature slag, and the air exchanges heat with the slag after contact, obtaining high-temperature hot air, which is introduced into the interior of the smelting device body through the heat supply pipe 1.

[0027] The auxiliary processing section flattens and crushes the slag, reducing the volume of slag particles and improving heat exchange. It also cuts and separates the slag. One end of the ventilation duct extends through the axis of the auxiliary processing section, while the outer end of the ventilation duct extends through the side wall of the recovery boiler 3.

[0028] like Figure 3 As shown, the auxiliary processing part includes a downwardly opening pressure cover 5 and a plurality of cutters 6 arranged in a circumferential array. A drive motor 7 and a drive gear ring 8 are provided inside the pressure cover 5. The cutters 6 are equipped with a vertical rack rod 9. The drive gear ring 8 is fitted on the outer side of the rack rod 9. The drive motor 7 is used to drive the drive gear ring 8 to rotate. When the auxiliary processing part is downward, the slag can be compacted 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.

[0029] The outer side of the driving gear ring 8 is provided with connecting teeth, and the output shaft of the driving motor 7 is equipped with a driving gear, which is meshed with the driving gear ring 8. The inner side of the driving gear ring 8 and the rack rod 9 are provided with connecting threads respectively. The driving gear ring 8 is equivalent to a nut mounted on the outside of the rack rod 9. When the driving gear ring 8 is rotated, the cutter 6 can be pulled up or pushed down.

[0030] When the pressing cover 5 is pressed downward, the cutter 6 is stored inside the pressing cover 5 .

[0031] like Figure 3 As shown, a first telescopic rod 10 is connected to the upper side of the auxiliary processing part, an air inlet pipe 11 is connected to the axial direction of the auxiliary processing part, an auxiliary telescopic rod 12 is arranged at the axis of the air inlet pipe 11, and an auxiliary pressing plate 13 is connected to the extended end of the auxiliary telescopic rod 12. The auxiliary pressing plate 13 is located on the inner bottom surface of the auxiliary processing part; When the auxiliary pressing plate 13 is pushed downward, the slag at the axis of the recovery boiler 3 is squeezed outward, so that the slag at the axis of the recovery boiler 3 is lower than the height of the slag outside, so that the air inlet pipe 11 is connected with the end of the ventilation channel.

[0032] The air inlet pipe 11 is connected to the fan, and the auxiliary telescopic rod 12 is used to press the auxiliary pressure plate 13 downward.

[0033] 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, the ventilation channel can be adjusted to expand the ventilation channel, and the slag in the ventilation channel is squeezed into the adjacent ventilation channel where heat exchange has been completed.

[0034] The bottom plate 2 can be disengaged from the recovery boiler 3 downwards. A support plate 15 is provided at the bottom of the recovery boiler 3. A plurality of second telescopic rods 16 are provided on the lower side of the support plate 15. The support plate 15 is provided with a rotary motor 17. The output shaft of the rotary motor 17 is fixedly connected to the bottom plate 2.

[0035] The auxiliary push rod 14 includes a slag pushing 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 pushing 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, so that the slag inside that has not been heat exchanged is exposed to the outside, thereby improving the heat exchange effect. At the same time, the ventilation channel is expanded to promote the discharge of hot air.

[0036] like Figure 3 As shown, the bottom surface of the pressure cover 5 is recessed to form a plurality of receiving grooves 18 , and the cutter 6 is disposed in the receiving groove 18 . The receiving groove 18 is provided with a plurality of guide rods 19 , and the guide rods 19 are slidably connected to the cutter 6 .

[0037] It also includes an upper fixing seat and a lower fixing seat, the auxiliary processing part is connected to the upper fixing seat, the bottom plate 2 is connected to the lower fixing seat, and the auxiliary processing part is coaxially arranged with the recovery boiler 3.

[0038] The method of use includes any one of the above-mentioned LCC steel smelting devices, specifically comprising the following steps: The bottom plate 2 is lifted upward to the inside of the recovery boiler 3, and the smelting slag is added to the inside of the recovery boiler 3. The auxiliary treatment part is pressed down to make the slag evenly spread on the bottom plate 2; The auxiliary telescopic rod 12 extends and the auxiliary pressing 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 driving motor 7 is turned on, and the driving motor 7 drives the multiple cutters 6 to press down through the driving gear ring 8. The cutters 6 cut the slag, and the cutters 6 are retracted to form multiple ventilation channels inside the slag. The upper portion of the cutter 6 is recessed to form a receiving space. When the cutter 6 is retracted upward, 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 a conventional cutter 6 is relatively narrow, requiring adjustment via an auxiliary push rod 14. The ventilation channel, after the wide cutter 6 has cut the slag, can be directly ventilated and heat exchanged.

[0039] External air enters into multiple ventilation channels through the air inlet pipe 11, rotates through the bottom plate 2, and the bottom plate 2 drives the slag to rotate, so that multiple ventilation channels are arranged opposite to the heating pipe 1 one by one, and the slag is efficiently heat exchanged. High-temperature hot air is sent into the main body of the smelting device through the heating pipe 1.

[0040] The bottom 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; When the bottom plate 2 continues to rotate, the bottom plate 2 drives the next ventilation channel to rotate to the inside of the heating pipe 1, and the auxiliary push rod 14 extends. The auxiliary push rod 14 pushes the slag in the ventilation channel to move toward the ventilation channel that has completed heat exchange, so that the ventilation channel is expanded and the ventilation and heat exchange effect is improved.

[0041] The above-mentioned specific embodiments are only specific cases 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-mentioned specific embodiments. Any LCC steel smelting device and method that conforms to the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in the corresponding technical field shall fall within the patent protection scope of the present invention.

Claims

1. An LCC steel smelting device, comprising a smelting device body and a heating module, characterized in that: The heating module is used to recover waste heat from steelmaking slag, and the heat recovered by the heating module is fed into the main body of the smelting device; The heating module comprises a fan, a waste heat recovery device and a heating pipe (1), wherein the heating pipe (1) is connected between the waste heat recovery device and the main body of the smelting device, and the fan is used to ventilate the interior of the waste heat recovery device. The waste heat recovery device comprises a recovery boiler (3) rotatably arranged on a bottom plate (2) and an auxiliary processing part arranged on the upper side of the recovery boiler (3). Slag is added to the interior of the recovery boiler (3), and the slag is squeezed and separated by the auxiliary processing part to form a plurality of fan-shaped slag piles (4). Ventilation channels are formed between adjacent slag piles (4), and external air passes through the ventilation channels and exchanges heat with the slag piles (4).

2. The LCC steel smelting device according to claim 1, characterized in that: The auxiliary processing part includes a downwardly opening pressure cover (5) and a plurality of cutters (6) arranged in a circumferential array, a driving motor (7) and a driving gear ring (8) are arranged inside the pressure cover (5), the cutter (6) is equipped with a vertical rack rod (9), the driving gear ring (8) is fitted on the outer side of the rack rod (9), and the driving motor (7) is used to drive the driving gear ring (8) to rotate; When the auxiliary processing part is downward, the slag can be compacted 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 device according to claim 1, characterized in that: The upper side of the auxiliary processing part is connected to a first telescopic rod (10), the axis direction of the auxiliary processing part is connected to an air inlet pipe (11), the axis of the air inlet pipe (11) is provided with an auxiliary telescopic rod (12), the extended end of the auxiliary telescopic rod (12) is connected to an auxiliary pressing plate (13), and the auxiliary pressing plate (13) is located on the inner bottom surface of the auxiliary processing part; When the auxiliary pressing plate (13) is pushed downward, the slag at the axis of the recovery boiler (3) is squeezed outward, so that the slag at the axis of the recovery boiler (3) is lower than the height of the slag outside, so that the air inlet pipe (11) and the end of the ventilation channel are connected.

4. The LCC steel smelting device according to claim 1, characterized in that: The heating pipe (1) is connected to the side of the recovery boiler (3), and 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), the ventilation channel can be adjusted to expand the ventilation channel, and the slag at the ventilation channel is squeezed into the adjacent ventilation channel where heat exchange has been completed.

5. The LCC steel smelting device according to claim 1, characterized in that: The bottom plate (2) can be disengaged downward from the recovery boiler (3); a support plate (15) is provided at the bottom of the recovery boiler (3); a plurality of second telescopic rods (16) are arranged on the lower side of the support plate (15); the support plate (15) is provided with a rotating motor (17); and an output shaft of the rotating motor (17) is fixedly connected to the bottom plate (2).

6. The LCC steel smelting device according to claim 2, characterized in that: The bottom surface of the pressure cover (5) is recessed to form a plurality of receiving grooves (18), the cutter (6) is arranged in the receiving groove (18), and the receiving groove (18) is provided with a plurality of guide rods (19), which are slidably connected to the cutter (6).

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

8. Method of use, characterized in that: The LCC steel smelting device according to any one of claims 1 to 7 specifically comprises the following steps: The bottom plate (2) is lifted upward to the inside of the recovery boiler (3), the smelting slag is added to the inside of the recovery boiler (3), and the auxiliary treatment part is pressed downward to make the slag evenly spread on the bottom plate (2); The auxiliary pressing plate (13) is pressed downward to form an air intake space on the lower side of the air intake pipe (11), and the slag is cut by the cutter (6). The cutter (6) is retracted to form multiple ventilation channels inside the slag; External air enters the interior of the multiple ventilation channels through the air inlet pipe (11), and rotates through the bottom plate (2), so that the multiple ventilation channels are arranged opposite to the heating pipe (1) one by one, and the slag is efficiently heat-exchanged, and the high-temperature hot air is sent into the interior of the smelting device body through the heating pipe (1).

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