An annular furnace and an annular furnace heat treatment production line

Abstract

This utility model relates to the field of workpiece heat treatment. More specifically, this utility model relates to a ring furnace and a ring furnace heat treatment production line. The ring furnace includes a ring furnace body and a feeding / discharging mechanism disposed at its inlet and outlet. Two material trays are arranged radially side by side at each material position on the ring furnace body. The discharging mechanism can push the two parallel material trays into the ring furnace body or pull out the two material trays at any material position on the ring furnace body. This utility model provides a ring furnace and a ring furnace heat treatment production line. Each material position of the ring furnace has two material trays placed side by side. The two material trays can be equivalent to a long material tray, increasing the number of workpieces that can be heated in a single cycle in the ring furnace. Moreover, when circulating in the ring furnace heat treatment production line, the two material trays are separated and transferred, which is no different from the transfer of traditional material trays and does not affect other equipment in the ring furnace heat treatment production line.

Description

Technical Field

[0001] This utility model relates to the field of workpiece heat treatment. More specifically, this utility model relates to a ring furnace and a ring furnace heat treatment production line. Background Technology

[0002] An annular furnace is a continuous heating device with a rotating annular hearth as its core feature. The billet undergoes preheating, heating, and homogenization processes as it rotates within the hearth. Currently, most annular furnace heat treatment production lines use a single long tray at each material level. The furnace is divided into heating, strong penetration, diffusion, and cooling zones, with the tray material moving between these zones. While long trays can increase the number of workpieces heated in a single cycle, their excessive length places greater demands on the dimensions of other equipment compared to traditional trays, increasing the burden on existing equipment and creating significant difficulties in managing the trays and tools in current annular furnace production lines. Utility Model Content

[0003] The purpose of this utility model is to provide a ring furnace and a ring furnace heat treatment production line. Each material position of the ring furnace has two material trays placed side by side. The two material trays can be equivalent to a long material tray, which increases the number of workpieces heated in a single ring furnace. Moreover, when the ring furnace heat treatment production line is in operation, the two material trays are separated and transferred, which is no different from the transfer of traditional material trays and does not affect other equipment in the ring furnace heat treatment production line.

[0004] To achieve these objectives and other advantages according to the present invention, a ring furnace is provided, comprising a ring furnace body and a feeding / discharging mechanism disposed at its inlet and outlet. Two material trays are arranged radially side by side at the material level of the ring furnace body. The discharging mechanism can push the two material trays arranged side by side into the ring furnace body, or pull out the two material trays at any material level of the ring furnace body.

[0005] This utility model also provides a ring furnace heat treatment production line, including the above-mentioned ring furnace, and further including: The quenching oil tank has its inlet end connected to the feeding and discharging mechanism. The post-cleaning mechanism has its inlet end connected to the outlet end of the quenching oil tank; The tempering furnace has its feed end connected to the discharge end of the post-cleaning mechanism; A cooling mechanism, the inlet of which is connected to the outlet of the tempering furnace; The upper unloading mechanism has its inlet end connected to the outlet end of the cooling mechanism; A preheating furnace, the inlet of which is connected to the outlet of the upper unloading mechanism; The feeding mechanism has its inlet end connected to the outlet end of the preheating furnace, and its outlet end connected to the feeding and discharging mechanism.

[0006] Furthermore, the aforementioned annular furnace heat treatment production line also includes: The first push-pull material mechanism is connected to the quenching oil tank, the feeding and discharging mechanism and the loading mechanism respectively, so as to push the two parallel material trays on the loading mechanism onto the feeding and discharging mechanism, or push the two parallel material trays on the feeding and discharging mechanism onto the quenching oil tank.

[0007] Furthermore, in the aforementioned annular furnace heat treatment production line, the quenching oil tank includes: Oil tank; The quenching lifting platform is connected at its upper part to the first push-pull material mechanism and at its lower part to the oil tank. The discharge lifting platform extends its lower part into the oil tank; An oil-conveying unit is installed in the oil tank and can drive the material tray to move from the quenching lifting platform to the discharge lifting platform; The second push-pull material mechanism has its feeding end connected to the upper part of the discharge lifting platform, and its discharge end connected to the feeding end of the post-cleaning mechanism.

[0008] Furthermore, in the aforementioned annular furnace heat treatment production line, the post-cleaning mechanism includes: Cleaning machine; The feeding conveying unit has one end connected to the inlet of the washing machine and the other end connected to the outlet of the second push-pull material mechanism. The discharge conveying unit has one end passing through the discharge port of the washing machine and extending into the washing machine; The third push-pull material mechanism is located above the discharge conveying unit to push the material tray on the discharge conveying unit to the feed end of the tempering furnace.

[0009] Furthermore, in the aforementioned annular furnace heat treatment production line, the tempering furnace includes: The tempering furnace body has its inlet connected to the third push-pull material mechanism; The fourth push-pull material mechanism is installed on the tempering furnace body to push the material tray at the outlet of the tempering furnace body to the inlet end of the cooling mechanism.

[0010] Furthermore, in the aforementioned annular furnace heat treatment production line, the cooling mechanism includes: An air-cooled machine, the discharge port of which is connected to the inlet end of the upper unloading mechanism; The air cooler lifting platform is connected at its upper part to the discharge port of the tempering furnace body and at its lower part to the inlet of the air cooler.

[0011] Furthermore, in the aforementioned annular furnace heat treatment production line, the loading and unloading mechanism includes: The feeding roller conveyor has one end connected to the discharge port of the air cooler; The feeding roller conveyor is connected at one end to the feed inlet of the preheating furnace; The buffer roller conveyor has its two ends connected to the other ends of the feeding roller conveyor of the unloading roller conveyor.

[0012] Furthermore, in the aforementioned annular furnace heat treatment production line, the preheating furnace includes: A pre-oxidation furnace, the discharge port of which is connected to the charging mechanism; The fifth push-pull material mechanism is located above the feeding roller conveyor to push the material tray on the feeding roller conveyor to the feed port of the pre-oxidation furnace.

[0013] Furthermore, in the aforementioned annular furnace heat treatment production line, the charging mechanism includes: A loading lifting platform, the upper part of which is connected to the first push-pull material mechanism; The sixth push-pull material mechanism has its feed end connected to the discharge port of the pre-oxidation furnace, and its discharge port connected to the lower part of the loading lifting platform.

[0014] The beneficial effects of this utility model are: 1. In this utility model, each material position of the ring furnace has two material trays placed side by side. The two material trays can be equivalent to a long material tray, which increases the number of workpieces that can be heated in a single ring furnace. Moreover, when the ring furnace heat treatment production line is in operation, the two material trays are separated and transferred, which is no different from the transfer of traditional material trays and does not affect other equipment in the ring furnace heat treatment production line.

[0015] 2. Compared with the prior art, the ring furnace heat treatment production line of this utility model increases the number of workpieces heated in a single ring furnace, increases output, thereby improving production efficiency and making the production line layout more rational.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the ring furnace described in this utility model; Figure 2 This is a schematic diagram of the structure of the ring furnace heat treatment production line described in this utility model; Figure 3 This is a schematic diagram of the quenching oil tank and the loading mechanism described in this utility model; Figure 4This is a schematic diagram of the post-cleaning mechanism described in this utility model; Figure 5 This is a schematic diagram of the tempering furnace described in this utility model; Figure 6 This is a schematic diagram of the cooling mechanism described in this utility model; Figure 7 This is a schematic diagram of the upper unloading mechanism described in this utility model; Figure 8 This is a schematic diagram of the preheating furnace described in this utility model.

[0018] The reference numerals in the attached figures are as follows: 110 ring furnace body; 120 feeding and discharging mechanism; 111 furnace body; 112 bottom transmission system; 113 radiant tube; 114 fan; 130 material tray; Quenching oil tank 200; oil tank 210; quenching lifting platform 220; material discharge lifting platform 230; oil-cooled conveying unit 240; second push-pull material mechanism 250; Post-cleaning mechanism 300; cleaning machine 310; immersion tank 311; spray chamber 312; drying chamber 313; feeding conveyor unit 320; discharging conveyor unit 330; third push-pull material mechanism 340; Tempering furnace 400; Tempering furnace body 410; Fourth push-pull material mechanism 420 Cooling mechanism 500; air cooler 510; air cooler lifting platform 520; Upper unloading mechanism 600; lowering roller conveyor 610; upper loading roller conveyor 620; buffer roller conveyor 630; Preheating furnace 700; pre-oxidation furnace 710; fifth push-pull material mechanism 720, Loading mechanism 800; loading lifting platform 810; sixth push-pull material mechanism 820; First push-pull material mechanism 900. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement it based on the description.

[0020] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a ring furnace, including a ring furnace body 110 and a feeding / discharging mechanism 120 provided at its inlet and outlet. Two material trays 130 are arranged in parallel along the radial direction at the material level of the ring furnace body 110. The discharging mechanism can push the two parallel material trays 130 into the ring furnace body 110, or pull out the two material trays 130 at any material level of the ring furnace body 110.

[0022] In this embodiment, two material trays 130 are placed side by side at each material position of the annular furnace. The two material trays 130 can be equivalent to a long material tray 130, which increases the number of workpieces that can be heated in a single cycle in the annular furnace. Moreover, when the material trays 130 are transferred in the annular furnace heat treatment production line, they are separated and transferred in the same way as the traditional material trays 130, without affecting other equipment in the annular furnace heat treatment production line.

[0023] The ring furnace body 110 can be a conventional ring heating furnace, such as... Figure 1 As shown, it includes a furnace body 111, a heating system and a bottom transmission system 112. Multiple material positions are evenly distributed on the bottom transmission system 112 along the circumference. Two material trays 130 are placed side by side along the radial direction on each material position. The heating system uses multiple radiant tubes 113 to heat the inside of the furnace body 111, and multiple fans 114 are installed inside the furnace body 111.

[0024] like Figure 2 As shown, this utility model also provides a ring furnace heat treatment production line, including the above-mentioned ring furnace, and further including an oil tank 210, a quenching oil tank 210 200, a cleaning machine 310, a post-cleaning machine 310 mechanism 300, a tempering furnace 400, a cooling mechanism 500, an loading and unloading mechanism 600, a preheating furnace 700, a loading mechanism 800, and a first push-pull material mechanism 900.

[0025] In this embodiment, the working height of the annular furnace, oil tank 210 (quenching oil tank 210), cleaning machine 310 (post-cleaning machine 310 mechanism 300), and tempering furnace 400 is 2m. The working height of the cooling mechanism 500, unloading mechanism 600, and preheating furnace 700 is 0.5m. The working surfaces of the cooling mechanism 500 and the loading mechanism 800 need to be adjusted between 2m and 0.5m. Specifically, the production process of the annular furnace heat treatment production line is as follows: The loading and unloading mechanism 600 is divided into a loading area and a unloading area. The workpiece is loaded onto the material tray 130 and placed into the loading and unloading mechanism 600 from the loading area. The material trays 130 are arranged in a single row along the first direction and sent to the preheating furnace 700 for preheating. After preheating, the material trays 130 are sent to the working surface of the loading mechanism 800 at a height of 0.5m. After the first material tray 130 is sent into the loading mechanism 800, the second material tray 130 is sent in. The two material trays 130 are arranged side by side and close together along the first direction. Then the loading mechanism 800 lifts the two material trays 130 to the working surface of 2m and pushes them onto the feeding and discharging mechanism 120 in a double row through the first push-pull material mechanism 900 along a second direction perpendicular to the first direction. The feeding and discharging mechanism 120 then pushes the two material trays 130 into the corresponding material positions of the annular furnace body 110 along the first direction. After the workpiece is heated in the ring furnace body 110, the two trays 130 are pulled out along the first direction by the feeding and discharging mechanism 120, and then pushed along the second direction by the first push-pull material mechanism 900 into the oil tank 210 quenching oil tank 210200 for quenching. The trays 130 in the oil tank 210 quenching oil tank 210200 are conveyed in a single row along the first direction, and at this time the trays 130 are no longer conveyed in a single row. After the trays 130 pass through the oil tank 210 quenching oil tank 210200, the workpiece undergoes quenching treatment, and then passes through the cleaning machine 310 and the cleaning machine 310 mechanism 300, the tempering furnace 400 and the cooling mechanism 500 in sequence. During this process, the workpiece undergoes cleaning, drying, tempering and cooling treatment in sequence. Finally, the trays 130 reach the unloading area of ​​the upper unloading mechanism 600, and the unloading of the trays 130 is completed.

[0026] like Figure 3 As shown, the quenching oil tank 210200 includes: Oil tank 210; The quenching lifting platform 220 is connected to the first push-pull material mechanism 900 at its upper part and extends into the oil tank 210 at its lower part. The discharge lifting platform 230 extends its lower part into the oil tank 210; The oil conveying unit 240 is disposed in the oil tank 210 and can drive the material tray 130 to move from the quenching lifting platform 220 to the discharge lifting platform 230. The second push-pull material mechanism 250 has its feeding end connected to the upper part of the discharge lifting platform 230, and its discharge end connected to the feeding end of the rear cleaning machine 310 mechanism 300.

[0027] The first push-pull material mechanism 900 pushes two trays 130 onto the quenching lifting platform 220 at a height of 2m along the second direction. The quenching lifting platform 220 then lowers the trays 130 and workpieces into the oil tank 210, where they fall onto the underwater conveying unit 240. The underwater conveying unit 240 moves the trays 130 and workpieces along the first direction to the discharge lifting platform 230, where the trays 130 begin single-row conveying. During this process, the workpieces come into contact with the quenching medium for cooling. The discharge lifting platform 230 then lifts the trays 130 and workpieces to a height of 2m and pushes them onto the inlet end of the cleaning machine 310 mechanism 300 via the second push-pull material mechanism 250.

[0028] like Figure 4 As shown, the cleaning machine 310 and its component 300 include: Cleaning machine 310; The feeding conveying unit 320 has one end connected to the inlet of the washing machine 310 and the other end connected to the outlet of the second push-pull material mechanism 250. The discharge conveying unit 330 has one end passing through the discharge port of the cleaning machine 310 and extending into the cleaning machine 310; The third push-pull material mechanism 340 is disposed above the discharge conveying unit 330 to push the material tray 130 on the discharge conveying unit 330 to the feeding end of the tempering furnace 400.

[0029] The cleaning machine 310 includes an immersion tank 311, a spray chamber 312, and a drying chamber 313. The spray chamber 312 is located above the immersion tank 311, and a lifting mechanism is provided between the two. The second push-pull material mechanism 250 feeds the material tray 130 and the workpiece one by one into the feeding conveyor unit 320 along the first direction. The feeding conveyor unit 320 feeds the material tray 130 into the lifting mechanism at a height of 2m along the first direction. The lifting mechanism drives the material tray 130 and the workpiece to descend into the immersion tank 311. After the workpiece is immersed, the lifting mechanism... As the moving material tray 130 and the workpiece rise to a height of 2m and enter the spray chamber 312, the next material tray 130 is conveyed to the lifting mechanism by the feeding conveying unit 320, pushing the previous material tray 130 forward onto the discharge conveying unit 330. The discharge conveying unit 330 drives the material tray 130 and the workpiece through the drying chamber 313 along the first direction, moves them to the outside of the cleaning machine 310, and when they reach the third push-pull material mechanism 340, they are pushed into the tempering furnace 400 along the second direction.

[0030] like Figure 5 As shown, the tempering furnace 400 includes: The tempering furnace body 410 has its inlet connected to the third push-pull material mechanism 340. The tempering furnace body 410 can be an existing tempering furnace 400, which has a conveying device from the inlet to the outlet. The fourth push-pull material mechanism 420 is disposed on the tempering furnace body 410 to push the material tray 130 at the discharge port of the tempering furnace body 410 to the inlet end of the cooling mechanism 500.

[0031] After the material tray 130 and the workpiece are pushed to the tempering furnace body 410 by the third push-pull material mechanism 340, they are conveyed by its conveying equipment along the first direction from the inlet to the outlet, and tempering is completed in this process. At the outlet, the material tray 130 is pushed into the cooling mechanism 500 along the second direction by the fourth push-pull material mechanism 420 at a height of 2m.

[0032] like Figure 6 As shown, the cooling mechanism 500 includes: The air cooler 510 has its discharge port connected to the inlet end of the upper unloading mechanism 600; The air cooler lifting platform 520 is connected at its upper part to the discharge port of the tempering furnace body 410 and at its lower part to the inlet of the air cooler 510.

[0033] The fourth push-pull material mechanism 420 pushes the material tray 130 and the workpiece at a height of 2m onto the air cooler lifting platform 520. The air cooler lifting platform 520 drives the material tray 130 down to a height of 0.5m. The conveying mechanism inside the air cooler 510 drives the material tray 130 to move to the air cooler 510. After the material tray 130 passes through the air cooler 510 in the second direction to complete the cooling, it is sent into the loading and unloading mechanism 600.

[0034] like Figure 7 As shown, the unloading mechanism 600 includes: The feeding roller conveyor 610 has one end connected to the discharge port of the air cooler 510; The feeding roller conveyor 620 has one end connected to the feed inlet of the preheating furnace 700; A buffer roller conveyor 630 is provided, with its two ends connected to the other ends of the feeding roller conveyor 620 of the unloading roller conveyor 610. The buffer roller conveyor 630 is provided between the unloading roller conveyor 610 and the feeding roller conveyor 620. The buffer roller conveyor 630 is not powered. After the material tray on the unloading roller conveyor 610 moves to the buffer roller conveyor 630, it will remain on the buffer roller conveyor 630. The buffer roller conveyor 630 prevents the workers from unloading the material in a timely manner, allowing the material tray on the unloading roller conveyor 610 to move directly to the feeding roller conveyor 620.

[0035] The unloading roller conveyor 610 and the loading roller conveyor 620 serve as the unloading area and loading area of ​​the unloading mechanism 600, respectively. The material tray 130 and the workpiece processed by the cooling mechanism 500 enter the unloading roller conveyor 610. The unloading roller conveyor 610 moves the material tray 130 and the workpiece along the first direction at a height of 0.5m. During this process, the worker can remove the material tray 130 and the workpiece. After the workpiece to be processed is loaded onto the material tray 130, it is placed on the loading roller conveyor 620. The loading roller conveyor 620 conveys the material tray 130 and the workpiece to the preheating furnace 700 at a height of 0.5m.

[0036] like Figure 8 As shown, the preheating furnace 700 includes: The pre-oxidation furnace 710 has its discharge port connected to the charging mechanism 800; The fifth push-pull material mechanism 720 is disposed above the feeding roller conveyor 620 to push the material tray 130 on the feeding roller conveyor 620 to the feed port of the pre-oxidation furnace 710.

[0037] When the feeding roller conveyor 620 moves the material tray 130 and the workpiece to the fifth push-pull material mechanism 720, the fifth push-pull material mechanism 720 pushes them into the pre-oxidation furnace 710 at a height of 0.5m. The workpiece is preheated by the pre-oxidation furnace 710. The conveying mechanism inside the pre-oxidation furnace 710 drives the material tray 130 and the workpiece to the discharge port of the pre-oxidation furnace 710.

[0038] like Figure 3 As shown, the loading mechanism 800 includes: The upper part of the loading lifting platform 810 is connected to the first push-pull material mechanism 900; The sixth push-pull material mechanism 820 has its feed end connected to the discharge port of the pre-oxidation furnace 710, and its discharge port connected to the lower part of the loading lifting platform 810.

[0039] The sixth push-pull material mechanism 820 pulls out the discharge tray 130 and workpiece from the pre-oxidation furnace 710 and pushes them to the loading lifting platform 810 at a height of 0.5m. At this time, the loading lifting platform 810 loads two trays 130 at a time. Then the loading mechanism 800 lifts the two trays 130 to the working surface of 2m and pushes them to the feeding and discharging mechanism 120 in a double row along the second direction through the first push-pull material mechanism 900.

[0040] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.

Claims

1. A ring furnace, comprising a ring furnace body and a feeding / discharging mechanism disposed at its inlet and outlet, characterized in that, Two material trays are arranged in parallel along the radial direction at the material level of the annular furnace body. The discharge mechanism can push the two parallel material trays into the annular furnace body or pull out the two material trays at any material level of the annular furnace body.

2. A ring furnace heat treatment production line, characterized in that, Including the annular furnace as described in claim 1, further comprising: The quenching oil tank has its inlet end connected to the feeding and discharging mechanism. The post-cleaning mechanism has its inlet end connected to the outlet end of the quenching oil tank; The tempering furnace has its feed end connected to the discharge end of the post-cleaning mechanism; A cooling mechanism, the inlet of which is connected to the outlet of the tempering furnace; The upper unloading mechanism has its inlet end connected to the outlet end of the cooling mechanism; A preheating furnace, the inlet of which is connected to the outlet of the upper unloading mechanism; The feeding mechanism has its inlet end connected to the outlet end of the preheating furnace, and its outlet end connected to the feeding and discharging mechanism.

3. The ring furnace heat treatment production line as described in claim 2, characterized in that, Also includes: The first push-pull material mechanism is connected to the quenching oil tank, the feeding and discharging mechanism and the loading mechanism respectively, so as to push the two parallel material trays on the loading mechanism onto the feeding and discharging mechanism, or push the two parallel material trays on the feeding and discharging mechanism onto the quenching oil tank.

4. The ring furnace heat treatment production line as described in claim 3, characterized in that, The quenching oil tank includes: Oil tank; The quenching lifting platform is connected at its upper part to the first push-pull material mechanism and at its lower part to the oil tank. The discharge lifting platform extends its lower part into the oil tank; An oil-conveying unit is installed in the oil tank and can drive the material tray to move from the quenching lifting platform to the discharge lifting platform; The second push-pull material mechanism has its feeding end connected to the upper part of the discharge lifting platform, and its discharge end connected to the feeding end of the post-cleaning mechanism.

5. The ring furnace heat treatment production line as described in claim 4, characterized in that, The post-cleaning mechanism includes: Cleaning machine; The feeding conveying unit has one end connected to the inlet of the washing machine and the other end connected to the outlet of the second push-pull material mechanism. The discharge conveying unit has one end passing through the discharge port of the washing machine and extending into the washing machine; The third push-pull material mechanism is located above the discharge conveying unit to push the material tray on the discharge conveying unit to the feed end of the tempering furnace.

6. The ring furnace heat treatment production line as described in claim 5, characterized in that, The tempering furnace includes: The tempering furnace body has its inlet connected to the third push-pull material mechanism; The fourth push-pull material mechanism is installed on the tempering furnace body to push the material tray at the outlet of the tempering furnace body to the inlet end of the cooling mechanism.

7. The ring furnace heat treatment production line as described in claim 6, characterized in that, The cooling mechanism includes: An air-cooled machine, the discharge port of which is connected to the inlet end of the upper unloading mechanism; The air cooler lifting platform is connected at its upper part to the discharge port of the tempering furnace body and at its lower part to the inlet of the air cooler.

8. The ring furnace heat treatment production line as described in claim 7, characterized in that, The loading and unloading mechanism includes: The feeding roller conveyor has one end connected to the discharge port of the air cooler; The feeding roller conveyor is connected at one end to the feed inlet of the preheating furnace; The buffer roller conveyor has its two ends connected to the other ends of the feeding roller conveyor of the unloading roller conveyor.

9. The ring furnace heat treatment production line as described in claim 8, characterized in that, The preheating furnace includes: A pre-oxidation furnace, the discharge port of which is connected to the charging mechanism; The fifth push-pull material mechanism is located above the feeding roller conveyor to push the material tray on the feeding roller conveyor to the feed port of the pre-oxidation furnace.

10. The ring furnace heat treatment production line as described in claim 9, characterized in that, The loading mechanism includes: A loading lifting platform, the upper part of which is connected to the first push-pull material mechanism; The sixth push-pull material mechanism has its feed end connected to the discharge port of the pre-oxidation furnace, and its discharge port connected to the lower part of the loading lifting platform.

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