Sintering system

Abstract

The invention provides a sintering system which comprises a feeding device, a sintering furnace, a cooling device and a discharging device, the feeding device comprises a feeding and distributing assembly, a molybdenum boat feeding and moving assembly, a feeding sealing chamber, a feeding push rod mechanism and a feeding heat insulation gate valve, and the molybdenum boat feeding and moving assembly is located between the feeding and distributing assembly and the feeding sealing chamber; the feeding heat insulation gate valve is located between the feeding sealing chamber and the sintering furnace. The sintering furnace comprises a pre-sintering area and a high-temperature area, the pre-sintering area and the high-temperature area each comprise a furnace body, a movable beam module and a heating element, and the movable beam modules and the heating elements are located in the furnace bodies. The cooling device is located on the side, away from the presintering area, of the high-temperature area and comprises a cooling assembly and a mesh belt conveying assembly. The discharging device comprises a discharging heat insulation gate valve, a discharging sealing chamber, a molybdenum boat discharging moving assembly and a discharging distributing assembly. The sintering efficiency and safety of the sintering system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material sintering, and in particular to a sintering system. Background Art

[0002] Sintering, the process of converting powdered materials into a dense body, is a traditional process. It has long been used to produce ceramics, powder metallurgy, refractories, and ultra-high-temperature materials. Generally speaking, the dense body obtained by sintering a powder after forming is a polycrystalline material with a microstructure composed of crystals, glass, and pores. The sintering process directly affects the grain size, pore size, and grain boundary shape and distribution in the microstructure. The properties of inorganic materials are closely related not only to the material composition (chemical and mineralogical composition) but also to the material's microstructure. Sintering can also improve the metallurgical properties of the raw materials. Sintering is also used in non-ferrous metal smelting processes.

[0003] Currently, existing sintering systems utilize linearly arranged sintering furnaces equipped with movable charge distribution and ignition units, enabling automated charge distribution, ignition, and temperature control. While these systems can sinter materials, they suffer from low sintering efficiency and low safety. Therefore, improving the efficiency and safety of sintering systems is a pressing technical challenge. Summary of the Invention

[0004] In view of this, an embodiment of the present invention provides a sintering system to eliminate or improve one or more defects in the prior art.

[0005] One aspect of the present invention provides a sintering system, comprising: a feeding device, a sintering furnace, a cooling device, and a discharging device.

[0006] The feeding device includes a feeding distribution assembly, a molybdenum boat feeding moving assembly, a feeding sealing chamber, a feeding push rod mechanism and a feeding heat insulation gate valve. The molybdenum boat feeding moving assembly is located between the feeding distribution assembly and the feeding sealing chamber. The molybdenum boat feeding moving assembly is used to transport the molybdenum boat containing the material to be sintered to the feeding sealing chamber. The feeding heat insulation gate valve is located between the feeding sealing chamber and the sintering furnace. The feeding push rod mechanism is used to push the molybdenum boat in the feeding sealing chamber to the sintering furnace.

[0007] The sintering furnace includes a pre-burning zone and a high-temperature zone, each of which includes a furnace body, a movable beam module, and a heating element. The movable beam module and the heating element are both located in the furnace body. The movable beam module is used to transport the molybdenum boat, and the heating element is used to heat the furnace body. The pre-burning zone is located on a side of the feed insulation gate valve away from the feed push rod mechanism, and the high-temperature zone is located on a side of the pre-burning zone away from the feed insulation gate valve.

[0008] The cooling device is located on a side of the high temperature zone away from the pre-burning zone, and the cooling device includes a cooling assembly and a mesh belt transmission assembly, and the cooling assembly is used to cool the material boat on the mesh belt in the mesh belt transmission assembly;

[0009] The discharging device includes a discharging insulation gate valve, a discharging sealing chamber, a molybdenum boat discharging moving assembly and a discharging cloth assembly. The discharging insulation gate valve is located between the cooling device and the discharging sealing chamber, the molybdenum boat discharging moving assembly is located on the discharge port side of the discharging sealing chamber, and the discharging cloth assembly is located at the end of the molybdenum boat discharging moving assembly.

[0010] In some embodiments of the present invention, the sintering system includes an atmosphere control subsystem, which includes a cooling gas generating module, a purge gas generating module, a cooling gas supply pipe and a purge gas supply pipe. The cooling gas generating module is used to transport cooling gas to the cooling gas supply pipe, and the cooling gas output by the cooling gas supply pipe is used to cool each of the moving beam modules. The purge gas generating module is used to transport purge gas to the purge gas supply pipe, and the purge gas output by the purge gas supply pipe is used to purge the feed sealing chamber and the discharge sealing chamber.

[0011] In some embodiments of the present invention, the moving beam module includes a moving beam driving component, a transmission assembly and a walking beam, and the moving beam driving component can drive the walking beam to move up and down and move horizontally through the transmission assembly; and / or,

[0012] The pre-firing zone includes a natural temperature rising section, a plurality of first heating sections and a first transition section, and the high temperature zone includes a second transition section and a plurality of second heating sections.

[0013] In some embodiments of the present invention, the molybdenum boat feed moving assembly includes a feed bracket, a first driving component, a sprocket chain mechanism, a roller conveying mechanism and a limiting component. The first driving component, the sprocket chain mechanism, the roller conveying mechanism and the limiting component are all arranged on the feed bracket. The first driving component drives the sprocket chain mechanism and the roller conveying mechanism, and the limiting component is used to limit the material boat.

[0014] In some embodiments of the present invention, the feed push rod mechanism includes a second driving component, a rack and pinion mechanism, and a push rod, and the second driving component drives the push rod to move horizontally through the rack and pinion mechanism; and / or,

[0015] The feed thermal insulation gate valve includes a gate door, a third driving component and a position detection component. The third driving component is used to drive the gate door to rise and fall, and the position detection component is used to detect the position information of the gate door.

[0016] In some embodiments of the present invention, the natural heating section completes the temperature rise from room temperature to 800 degrees, the number of the first heating sections is three, the three first heating sections complete the sintering at 800 degrees, the first transition section and the second transition section complete the temperature rise from 800 degrees to 1100 degrees, the number of the second heating sections is four, the four second heating sections include a first uniform temperature section, two high temperature sections and a second uniform temperature section, the first uniform temperature section completes the uniform temperature of 1100 degrees, the two high temperature sections complete the sintering from 1100 degrees to 1600 degrees, and the second uniform temperature section completes the uniform temperature of 1600 degrees.

[0017] In some embodiments of the present invention, the mesh belt transmission component includes a mesh belt turntable and a mesh belt drive station, the mesh belt turntable is connected to the discharge port of the high temperature zone, the mesh belt drive station includes a mesh belt drive wheel, a mesh belt tensioning wheel and a mesh belt displacement measuring component, the mesh belt drive wheel is provided with a rotary encoder, the mesh belt displacement measuring component is used to measure the moving distance of the mesh belt, the cooling component is a water cooling component, and a cooling jacket is provided between the discharge port of the high temperature zone and the mesh belt turntable.

[0018] In some embodiments of the present invention, the molybdenum boat discharging moving assembly includes a discharging bracket, a chain translation mechanism, and a moving trolley, and the chain translation mechanism and the moving trolley are both arranged on the discharging bracket.

[0019] In some embodiments of the present invention, the material discharging assembly includes a material discharging weighing assembly and a grabbing mechanism, wherein the material discharging weighing assembly is used to weigh the material boat, and the grabbing mechanism is used to grab the material boat to the material discharging position.

[0020] In some embodiments of the present invention, the sintering system includes a tail gas combustion tower, the air inlet end of the tail gas combustion tower is connected to the tail gas output end of the sintering furnace through a tail gas discharge pipe, the tail gas discharge pipe has an insulation layer on the outside, and an automatic regulating butterfly valve is provided on the tail gas discharge pipe.

[0021] The sintering system disclosed in the above embodiment of the present invention includes a feeding device, a sintering furnace, a cooling device and a discharging device, and the feeding device and the discharging device realize the movement of the molybdenum boat based on the molybdenum boat feeding moving assembly and the molybdenum boat discharging moving assembly respectively, and the sintering furnace includes a pre-firing zone and a high-temperature zone, and both the pre-firing zone and the high-temperature zone are provided with a moving beam module. The sintering system realizes the transmission of the material boat inside the sintering furnace through the moving beam module. The sintering system not only improves the transmission efficiency of the material boat, but also improves the sintering stability of the system, thereby improving the sintering efficiency and safety of the sintering system.

[0022] Additional advantages, objects, and features of the present invention will be set forth in part in the following description and will become apparent to those skilled in the art upon examination of the following or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained by the structures particularly pointed out in the description and drawings.

[0023] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to the above specific descriptions, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are intended to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are merely for the purpose of illustrating the principles of the present invention. To facilitate the illustration and description of certain portions of the present invention, corresponding portions in the drawings may be exaggerated, that is, may be larger than other components in an exemplary device actually manufactured according to the present invention. In the drawings:

[0025] Figure 1 Schematic diagram of the structure of a sintering system according to an embodiment of the present application.

[0026] Figure 2 This is a top view of a sintering system according to an embodiment of the present application.

[0027] Figure 3 This is a top view of a feeding device of a sintering system according to an embodiment of the present application.

[0028] Figure 4 This is a structural schematic diagram of the molybdenum boat feeding moving component of the feeding device according to one embodiment of the present application.

[0029] Figure 5 This is a schematic structural diagram of a feeding sealing chamber of a feeding device according to an embodiment of the present application.

[0030] Figure 6 This is a structural schematic diagram of the feed push rod mechanism of the feed device of one embodiment of the present application.

[0031] Figure 7 This is a structural schematic diagram of a feed insulation gate valve of a feed device according to an embodiment of the present application.

[0032] Figure 8 Schematic diagram of the structure of a sintering furnace of a sintering system according to an embodiment of the present application.

[0033] Figure 9 Schematic cross-sectional view of a pre-firing zone of a sintering furnace according to an embodiment of the present application.

[0034] Figure 10 Schematic cross-sectional view of a high-temperature zone of a sintering furnace according to an embodiment of the present application.

[0035] Figure 11 Schematic diagram of the airtight joint structure of the heating element of the sintering furnace according to one embodiment of the present application.

[0036] Figure 12 This is a schematic structural diagram of a furnace cover of a sintering furnace according to an embodiment of the present application.

[0037] Figure 13 Schematic diagram of the structure of a cooling device of a sintering system according to an embodiment of the present application.

[0038] Figure 14 This is a schematic structural diagram of a discharge device of a sintering system according to an embodiment of the present application.

[0039] Figure 15 This is a top view of a discharge device of a sintering system according to an embodiment of the present application.

[0040] Figure 16 This is a structural schematic diagram of the molybdenum boat discharging moving component of the discharging device according to one embodiment of the present application.

[0041] Figure 17 This is a schematic structural diagram of a discharge sealing chamber of a discharge device according to an embodiment of the present application.

[0042] Figure 18 This is a schematic structural diagram of a discharge insulation gate valve of a discharge device according to an embodiment of the present application.

[0043] Figure 19 This is a structural diagram of an automatic loading and unloading device according to an embodiment of the present application.

[0044] Figure 20 Schematic diagram of the structure of a molybdenum boat transmission component according to one embodiment of the present application.

[0045] Figure 21 This is a structural diagram of an automatic loading and unloading device according to an embodiment of the present application.

[0046] Figure 22This is a schematic structural diagram of a control cabinet of a control system according to an embodiment of the present application.

[0047] Figure 23 This is a schematic diagram of the operation of the moving beam module.

[0048] Reference numerals:

[0049] Feeding device 100, sintering furnace 200, cooling device 300, discharging device 400, feeding distribution assembly 110, molybdenum boat feeding moving assembly 120, feeding sealing chamber 130, feeding push rod mechanism 140, feeding thermal insulation gate valve 150, feeding bracket 111, first driving component 112, roller conveying mechanism 113, pre-sintering zone 210, high temperature zone 220, heating element 230, furnace cover 240, mesh belt rotating station 310, mesh belt driving station 320, discharging thermal insulation gate valve 410, discharging sealing chamber 420, molybdenum boat discharging moving assembly 430, discharging bracket 431, mobile trolley 432, automatic loading and unloading device 500, chain transmission station 510, bracket 521, temporary storage bin 522, feeding chain station 523, discharging chain station 524, tail gas combustion tower 600 DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0051] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, the accompanying drawings only show structures and / or processing steps closely related to the solutions according to the present invention, while other details that are not closely related to the present invention are omitted.

[0052] It should be emphasized that the term "include / comprises" when used herein refers to the existence of features, elements, steps or components, but does not exclude the existence or addition of one or more other features, elements, steps or components.

[0053] It should also be noted here that, unless otherwise specified, the term "connection" in this article can refer not only to a direct connection, but also to an indirect connection with an intermediary, and not only to a wired connection but also to a wireless connection, and the specific connection can be changed based on the actual application scenario.

[0054] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0055] Figure 1 This is a schematic structural diagram of a sintering system according to an embodiment of the present application. Figure 2This is a top view of a sintering system according to an embodiment of the present application. Figure 1 and Figure 2 As shown, the sintering system at least includes a feeding device 100 , a sintering furnace 200 , a cooling device 300 and a discharging device 400 .

[0056] The feeding device 100 includes a feed distribution component 110, a molybdenum boat feed moving component 120, a feed sealing chamber 130, a feed push rod mechanism 140 and a feed insulation gate valve 150. The molybdenum boat feed moving component 120 is located between the feed distribution component 110 and the feed sealing chamber 130. The molybdenum boat feed moving component 120 is used to transport the molybdenum boat containing the material to be sintered to the feed sealing chamber 130. The feed insulation gate valve 150 is located between the feed sealing chamber 130 and the sintering furnace 200. The feed push rod mechanism 140 is used to push the molybdenum boat in the feed sealing chamber 130 to the sintering furnace 200.

[0057] The sintering furnace 200 includes a pre-burning zone 210 and a high-temperature zone 220, each of which includes a furnace body, a movable beam module, and a heating element 230. The movable beam module and the heating element 230 are both located in the furnace body. The movable beam module is used to transport the molybdenum boat, and the heating element 230 is used to heat the furnace body. The pre-burning zone 210 is located on a side of the feed insulation gate valve 150 away from the feed push rod mechanism 140, and the high-temperature zone 220 is located on a side of the pre-burning zone 210 away from the feed insulation gate valve 150. Exemplarily, the pre-burning zone 210 may include a natural temperature rise section, multiple first heating sections, and a first transition section, and the high-temperature zone includes a second transition section and multiple second heating sections.

[0058] The cooling device 300 is located on a side of the high temperature zone 220 away from the pre-firing zone 210. The cooling device 300 includes a cooling assembly and a mesh belt transmission assembly. The cooling assembly is used to cool the material boat on the mesh belt in the mesh belt transmission assembly.

[0059] The discharging device 400 includes a discharging insulation gate valve 410, a discharging sealing chamber 420, a molybdenum boat discharging moving assembly 430 and a discharging cloth assembly. The discharging insulation gate valve 410 is located between the cooling device 300 and the discharging sealing chamber 420, the molybdenum boat discharging moving assembly 430 is located on the discharge port side of the discharging sealing chamber 420, and the discharging cloth assembly is located at the end of the molybdenum boat discharging moving assembly 430.

[0060] refer to Figure 1As shown, the feed distribution assembly 110 and the discharge distribution assembly can be centrally arranged, the feed distribution assembly 110 can be connected to an external material automatic transfer system, and the molybdenum boat can be transported between the feed distribution assembly 110 and the molybdenum boat feed moving assembly 120 through a material transfer track. Figure 3 The feeding device 100 mainly includes a feeding distribution component 110, a molybdenum boat feeding moving component 120, a feeding sealing chamber 130, a feeding push rod mechanism 140 and a feeding insulation gate valve 150, that is, the molybdenum boat feeding moving component 120 is responsible for pushing the material to be sintered on the material transmission track to the feeding sealing chamber 130, and the feeding push rod mechanism 140 pushes the material boat in the feeding sealing chamber 130 to the walking beam inside the sintering furnace 200.

[0061] Further, such as Figure 4 As shown, the molybdenum boat feed and moving assembly 120 includes a feed support 111, a first drive component 112, a sprocket chain mechanism, a roller conveyor mechanism 113, and a position-limiting component. The first drive component 112, the sprocket chain mechanism, the roller conveyor mechanism 113, and the position-limiting component are all mounted on the feed support 111. The first drive component 112 drives the sprocket chain mechanism and the roller conveyor mechanism 113. The position-limiting component is used to limit the position of the boat. In this embodiment, the molybdenum boat feed and moving assembly 120 receives a molybdenum boat loaded with material to be sintered. The position-limiting component detects and adjusts the position of the molybdenum boat via the position-limiting component, so that the roller conveyor mechanism 113 stops rotating when the molybdenum boat is in place. The sprocket chain mechanism propels the molybdenum boat to the waiting position, awaiting a signal from the sintering furnace 200 to request material, and the flap of the feed sealed chamber 130 opens. Furthermore, the molybdenum boat feed and moving assembly 120 may also include a rotating interface, which is driven to rise when the flap of the feed sealed chamber 130 opens. In addition, after the flap of the feeding sealing chamber 130 is opened, the push rod in the feeding pushing rod mechanism 140 moves forward to send the molybdenum boat into the feeding sealing chamber 130, and further the push rod of the feeding pushing rod mechanism 140 returns to its original position.

[0062] refer to Figure 6 The feed push rod mechanism 140 includes a second driving component, a rack and pinion mechanism, and a push rod. The second driving component drives the push rod to move horizontally through the rack and pinion mechanism. In one embodiment, the moving speed of the push rod can be adjusted, and its working status can be monitored through the HMI. For example, the feed push rod mechanism 140 has the function of detecting and alarming abnormal situations such as the material boat is not in place and the boat is stuck during the pushing process. When an abnormal situation occurs, the pushing of the material is automatically stopped. In addition, a limit switch for the push rod to move forward and backward can be provided, and a purge gas inlet can be provided at the end of the push rod to purge the push rod with purge gas. At this time, in addition to the second driving component, the rack and pinion mechanism, and the push rod, the feed push rod mechanism 140 can also include an air intake sealing shell, and the second driving component can specifically be a motor.

[0063] Figure 5 The figure is a schematic diagram of the structure of the feed sealed chamber 130 according to one embodiment of the present invention. In this embodiment, the feed sealed chamber 130 employs a double-sealed door design to ensure airtightness. The feed sealed chamber 130 can be purged with nitrogen and equipped with a flow meter for remotely monitoring the purge flow rate for abnormalities. The furnace door of the feed sealed chamber 130 can be a flap door, meaning that a flame curtain is not required when the furnace door is opened. During operation, the opening and closing of the flap door of the feed sealed chamber 130, the opening and closing of the feed insulation gate valve 150, and the nitrogen purge are interlocked and interlocked. For example, the nitrogen purge is initiated before the flap door of the feed sealed chamber 130 is opened. Furthermore, a double door-in-place detection limit switch can be provided for the flap door and insulation gate valve of the feed sealed chamber 130. Subsequent steps are executed only after the double door-in-place detection limit switch detects that the double door is in place. In this embodiment, the material of the feed sealing chamber 130 may be HT200.

[0064] For example, Figure 7 As shown, the feed thermal insulation gate valve 150 may include a gate door, a third driving component and a position detection component, wherein the third driving component is used to drive the gate door to rise and fall, and the position detection component is used to detect the position information of the gate door.

[0065] Figure 8 FIG. 2 is a schematic structural diagram of a sintering furnace 200 of a sintering system according to an embodiment of the present application. Figure 8 As shown, the sintering furnace 200 primarily comprises a pre-firing zone 210 and a high-temperature zone 220. Each zone comprises a furnace body, a movable beam module, and heating elements 230; the furnace body specifically comprises a furnace shell and a furnace cover 240. The pre-firing zone 210 includes a natural heating section, multiple first heating sections, and a first transition section. The high-temperature zone 220 includes a second transition section and multiple second heating sections.

[0066] Exemplarily, the natural heating section completes the temperature rise from room temperature to 800 degrees, the number of the first heating sections is three, the three first heating sections complete the sintering at 800 degrees, the first transition section and the second transition section complete the temperature rise from 800 degrees to 1100 degrees, the number of the second heating sections is four, the four second heating sections include a first uniform temperature section, two high temperature sections and a second uniform temperature section, the first uniform temperature section completes the uniform temperature at 1100 degrees, the two high temperature sections complete the sintering from 1100 degrees to 1600 degrees, and the second uniform temperature section completes the uniform temperature at 1600 degrees.

[0067] Specifically, the total length of the pre-burning zone 210 can be 4520 mm, of which the length of the natural heating section is 1670 mm, and the first heating section can include two heating sections and one uniform temperature section. The length of the two heating sections is 750 mm, and the length of the uniform temperature section is also 750 mm. There is a 590 mm unheated first transition section on the rear side of the pre-burning zone 210. The first transition section uses an S-type thermocouple to monitor the rated temperature of this area, and the first transition section has over-temperature protection. Once the limit is reached, the heating power is cut off. The movable beam module inside the pre-burning zone 210 can be a movable beam module structure with a ceramic muffle cover, and each heating section and temperature-averaging section inside it are independently controlled. The heating body power of each zone in the pre-burning zone 210 is approximately 35KW, and the total heating power is 105KW; molybdenum alloy heating elements are used in the pre-burning zone 210, and the heating elements 230 can be specifically arranged on both sides of the ceramic muffle cover; 4 temperature measuring points can be set in each section, and each temperature measuring point is equipped with two thermocouples, one for controlling the temperature and the other for measuring the temperature; and each section uses an independent controller to perform PID adjustment on the temperature.

[0068] The high-temperature zone 220 has a total length of 6990 mm. The inlet of the high-temperature zone 220 features a 655 mm long, unheated second transition section, which, together with the first transition section of the pre-sintering zone 210, totals 1245 mm. Behind the second transition section, four second heating sections, each 1235 mm long, are located. The four second heating sections include a first uniform temperature section, two high-temperature sections, and a second uniform temperature section. The first uniform temperature section achieves a uniform temperature of 1100°C, the two high-temperature sections perform sintering between 1100°C and 1600°C, and the second uniform temperature section achieves a uniform temperature of 1600°C. Each heating section in the high-temperature zone 220 is independently controlled, with heating power of approximately 60 kW per section, for a total heating power of 240 kW. Similar to the pre-sintering zone 210, each heating section in the high-temperature zone 220 utilizes molybdenum alloy heating elements 230. Each section is equipped with dual thermocouples: one for temperature control and the other for temperature measurement. Each section utilizes an independent controller for PID temperature regulation. In addition, the high temperature zone 220 uses corundum standard bricks, Al2O3 ≥ 99.5%, density ≥ 3.20g / m 3 .

[0069] The processing time corresponding to each process in the pre-sintering zone 210, the high temperature zone 220 and the cooling device 300 in the above embodiment is shown in the following table:

[0070]

[0071] In each section, the time the boat stays can be determined by the ratio of the total length to 375. For example, if the length of the first temperature-averaging section is 750 mm, the time the boat stays in the first temperature-averaging section is 750 / 375 = 2 hours.

[0072] in Figure 9 and Figure 10 The diagrams show cross-sections of the pre-sintering zone 210 and the high-temperature zone 220 of the sintering furnace 200. The refractory materials used in the pre-sintering zone 210 primarily include the following types: 2-5mm corundum balls, JLC449, JLC450, JLC451, and JLC240 mineral wool boards, JLC1430 fiber blankets, JLC65 lightweight clay bricks, JLC25-08 lightweight high-alumina bricks, and JLC99 hollow corundum sphere bricks. The refractory materials used in the high-temperature zone 220 primarily include the following types: JLC1430 fiber blankets, JLC1600 fiber blankets, JLC28-09 lightweight high-alumina bricks, JLC99 hollow corundum sphere bricks, and JLC99AC corundum bricks.

[0073] Figure 11 FIG. 1 is a schematic diagram of the airtight joint structure of the heating element 230 of the sintering furnace 200 according to an embodiment of the present application. Figure 11 As shown, heating element 230 specifically comprises a molybdenum rod and molybdenum wire. An insulating block is placed between the molybdenum rod and the thermal bridge of the airtight joint, and seals are installed at corresponding locations. This airtight joint effectively ensures airtightness and insulation at the point where the molybdenum electrode rod penetrates the furnace wall. Combined with the cooling water pillow, it not only reduces the temperature of the sealing area and the furnace surface, but also lowers the operating temperature of the cable. The molybdenum electrode terminals are enclosed in a sealed nitrogen protection box, preventing sparks and improving equipment operation safety.

[0074] Figure 12 This is a structural diagram of the furnace cover 240 of the sintering furnace 200 according to an embodiment of the present application. Figure 12 As shown, the pre-burning zone 210 and the high-temperature zone 220 are both equipped with a furnace cover 240, which can be lifted for easy maintenance. The furnace shell of the sintering furnace 200 has sufficient strength, rigidity and hardness, and the overall structure of the furnace body is firm and reliable with good airtightness. The connection between the thermocouple and the furnace cover 240 is made into a flat seal, and maintenance openings for the moving beam modules are reserved in each area of ​​the furnace body; the moving beam module is assembled in sections and can be disassembled in sections during maintenance to reduce the maintenance space inside the factory; when the sintering system is running at the operating temperature, the furnace bricks at the bottom of the moving beam module have good thermal insulation measures. At the same time, according to the different working conditions of the moving beam module, a certain amount of hydrogen can be introduced into the box of the moving beam module in the high-temperature zone 220 to cool it down, thereby avoiding excessive temperature inside the moving beam module. In addition, the furnace cover 240 of the sintering furnace 200 is provided with a nozzle or valve for flushing the furnace with inert gas to ensure that hydrogen in all dead corners of the furnace body can be replaced and emptied; and a large amount of moisture in the refractory bricks of the sintering furnace 200 can also be discharged during the first baking of the furnace.

[0075] In addition to the above, the sintering system includes a tail gas combustion tower 600. The air inlet of the tail gas combustion tower 600 is connected to the tail gas output of the sintering furnace 200 via a tail gas discharge pipe. The tail gas discharge pipe is insulated and equipped with an automatically adjustable butterfly valve. In this embodiment, two ignition devices are provided. The tail gas discharge pipes of the two tail gas combustion towers 600 use electric butterfly valves. A PID algorithm ensures that the furnace pressure can be set and automatically controlled between 0.2 kPa and 2.0 kPa, with a furnace pressure fluctuation deviation of ±0.05 kPa.

[0076] The cooling device 300 includes a cooling component and a mesh belt transmission component. Exemplarily, the mesh belt transmission component includes a mesh belt turntable 310 and a mesh belt drive station 320. The mesh belt turntable 310 is connected to the discharge port of the high temperature zone 220. The mesh belt drive station 320 includes a mesh belt drive wheel, a mesh belt tensioning wheel and a mesh belt displacement measuring component. The mesh belt drive wheel is provided with a rotary encoder. The mesh belt displacement measuring component is used to measure the moving distance of the mesh belt. The cooling component is a water-cooled component, and a cooling jacket is provided between the discharge port of the high temperature zone 220 and the mesh belt turntable 310.

[0077] The cooling device 300 is used to provide cooling water to locations that require cooling, such as electrodes and furnace body connection flanges. Flow and temperature monitoring switches and manual valves are installed on each cooling branch pipeline. The flow and temperature detection signals are transmitted to the PLC for control. When insufficient water pressure, water outage or excessive temperature occur in the pipeline, the system can alarm and make a corresponding safety interlock response.

[0078] like Figure 13 As shown, the exit of the high-temperature zone 220 is the mesh belt turntable 310. The sintered material boat is pushed onto the high-temperature resistant metal mesh belt of the mesh belt turntable 310. After the movable beam module completes a stepping motion, the mesh belt propels the material boat forward a stepping distance. After cooling in the water cooling device, it is transferred to the discharge device 400 behind the mesh belt drive station 320. After the limit switch is triggered and the control system confirms that the discharge sealed chamber 420 is in a sealed state, a linkage is established to transfer the material boat to the discharge sealed chamber 420. The mesh belt turntable 310 serves as a slow cooling section and its length can be 1120 mm.

[0079] The cooling device 300 is longer and has a better cooling effect. The cooling device 300 is entirely located outside the furnace body. The water cooling device is entirely connected by hard pipes without hose joints, which can completely avoid water leakage caused by failure of the cooling water hose.

[0080] Specifically, the mesh belt drive station 320 mainly includes a mesh belt drive wheel, a mesh belt tensioning wheel and a mesh belt displacement measuring component. A rotary encoder is provided on the axle of the mesh belt drive wheel to measure the rotational angular displacement of the main drive shaft. A pressure wheel is provided on the left side of the active roller, which is pressed against the surface of the mesh belt to measure the linear displacement of the mesh belt during operation in real time. The linear displacement is converted into the angular displacement of the external cam turntable through the transmission shaft. During debugging, the transmission ratio of the measuring wheel system is adjusted to ensure that the measuring cam rotates one circle and the mesh belt moves one cooling step. Since this measurement method indirectly measures the linear displacement of the mesh belt, it can ensure that the transmission distance is equal each time the mesh belt moves; when the mesh belt is not tightened due to thermal expansion and other reasons, the mesh belt slips, the mesh belt drive shaft rotates and the encoder angular displacement reaches the set limit, and the measuring cam does not trigger the limit switch, indicating that slippage exists; at this time, the control system sends a prompt signal, and the mesh belt needs to be tensioned; the mesh belt tensioning device is on the right side of the driving wheel, which consists of left and right guide wheels and a middle tensioning wheel. By adjusting the screw rod to adjust the mesh belt tension, the mesh belt can be avoided from slipping and its stable operation can be ensured.

[0081] In addition, both the high-temperature zone 220 exit and the mesh belt turntable 310 are equipped with cooling jackets. These jackets feature a three-layer safety structure (one furnace chamber and two cooling water jackets) to prevent cooling water from entering the furnace. The cooling unit 300 can be up to 3000 mm long and features three sections of water-cooling jackets positioned outside the enclosed two-layer mesh belt transmission channel. The water-cooling unit utilizes a stainless steel rectangular furnace tube structure. A water jacket is installed outside the furnace muffle of the cooling unit 300, isolating the water jacket from the muffle to prevent cooling water from leaking into the furnace.

[0082] like Figure 14 and Figure 15 As shown, the discharging device 400 mainly includes a discharging insulation gate valve 410, a discharging sealing chamber 420, a molybdenum boat discharging moving assembly 430 and a discharging distribution assembly. The discharging sealing chamber 420 can be a double-sealed door sealing chamber, and the discharging distribution assembly can specifically be an automatic discharging device, which has functions such as material collection, weighing, lifting and flipping.

[0083] Figure 16 FIG. 4 is a structural diagram of a molybdenum boat discharging moving assembly 430 of a discharging device 400 according to an embodiment of the present invention. Figure 16As shown, the molybdenum boat discharge moving assembly 430 may include a discharge bracket 431, a chain translation mechanism, and a mobile trolley 432. The chain translation mechanism and mobile trolley 432 are both mounted on the discharge bracket 431. The discharge bracket 431 is made of carbon steel, painted, and secured to the ground via anchors. The chain translation mechanism includes a reduction motor and a transmission chain, which drives the mobile trolley 432 to move between the discharge and unloading positions. The mobile trolley 432 may specifically include a frame, a chain, a reduction motor, etc., and is used to receive and push the molybdenum boat.

[0084] Figure 17 FIG. 4 is a structural diagram of the discharge sealing chamber 420 of the discharge device 400 according to an embodiment of the present application. Figure 17 As shown, discharge sealed chamber 420 includes a sealed chamber body, a chain conveyor mechanism, and a flap door. A discharge track (chain conveyor mechanism) is installed within discharge sealed chamber 420. The discharge track serves as a material transfer connection between the movable beam module and the material transmission track, and specifically employs a chain transmission mechanism. Discharge sealed chamber 420 utilizes a double-sealed door structure. This double-sealed door design ensures a hydrogen seal and utilizes nitrogen purge and replacement. The flap door of discharge sealed chamber 420 is made of HT200, with SKF bearings and a SEW motor for the reduction motor.

[0085] Figure 18 This is a structural schematic diagram of the insulated gate valve of the discharge device 400 of an embodiment of the present application. The discharge insulated gate valve 410 is similar to the feed insulated gate valve 150. The discharge insulated gate valve 410 may include a drive motor, a gate door, a valve body frame and a limit switch.

[0086] In one embodiment, the loading and unloading of the material boat can be achieved through an automatic loading and unloading device 500, that is, the automatic loading and unloading device 500 automatically realizes material weighing, dumping, empty boat weighing, adding materials, etc. A molybdenum boat transmission component can be set between the automatic loading and unloading device 500 and the feeding device 100 and the discharging device 400, that is, the molybdenum boat that has been loaded by the automatic loading and unloading device 500 is transported to the feeding device 100 by the molybdenum boat transmission component, and the discharging device 400 transports the molybdenum boat by the molybdenum boat transmission component to the automatic loading and unloading device 500 to complete material weighing, dumping, etc., thereby realizing the cyclic sintering of the material in the molybdenum boat. Figure 19 As shown, molybdenum boat transmission components are respectively provided on both sides of the automatic loading and unloading device 500.

[0087] The automatic loading and unloading device 500 exemplarily specifically includes a feed distribution assembly 110 and a discharge distribution assembly, and the discharge distribution assembly includes a discharge weighing assembly and a gripping mechanism, wherein the discharge weighing assembly is used to weigh the material boat, and the gripping mechanism is used to grip the material boat to the discharge position. The automatic loading and unloading device 500 and the molybdenum boat transmission assembly are used to automatically transfer the loaded molybdenum boat out of the furnace to the material transmission track of the molybdenum boat transmission assembly and temporarily store it, and according to the procedure, send the molybdenum boat to the pre-discharge weighing position of the automatic loading and unloading device 500 for weighing by the discharge weighing assembly; after weighing, the gripping mechanism of the discharge station grabs the molybdenum boat and transports it to the discharge position. After the molybdenum boat is in place, it rotates and discharges according to the set program; after the material is turned over and unloaded, the molybdenum boat is transported to the discharge weighing position, and the molybdenum boat after unloading is weighed to confirm whether there is a large adhesion residue. If the unloading weighing component sends a signal that "the material boat is too heavy", a fault signal will be given and an alarm will be issued. In addition, material sintering can only be continued after the fault is eliminated and the fault information is manually confirmed and cleared.

[0088] In addition, after the empty boat (the molybdenum boat after unloading) is weighed, the automatic loading and unloading device 500 adds material and weighs it again; then the automatic loading and unloading device 500 sends it into the molybdenum boat transmission assembly between the feeding device 100; the full boat (the molybdenum boat filled with materials) is temporarily stored and transferred at the chain transmission station 510; and further sent to the molybdenum boat feeding moving assembly 120 according to the control program to realize the automatic circulation of the molybdenum boat.

[0089] like Figure 20 As shown, the molybdenum boat transport assembly can be equipped with four chain transfer stations 510, two of which are located in front of the automatic loading and unloading device 500 (near the feeding device 100), and the other two are located in the rear of the automatic loading and unloading device 500 (near the discharging device 400). Each chain transfer station 510 is hermetically connected to the sealed door of the automatic loading and unloading device 500. Each chain transfer station 510 can include a bracket 521, a reduction motor, a chain, guide bars, a flow bar, a flap door, etc. The bracket 521 can be made of carbon steel and painted. The bottom of the bracket 521 can be equipped with adjustable feet, which are fixed to the foundation with anchor bolts. The reduction motor can be a SEW series motor. The flap door can be made of acrylic and installed on the top of the bracket 521, forming a sealed space with the bracket 521 to prevent dust.

[0090] Figure 21 This is a structural diagram of an automatic loading and unloading device 500 according to an embodiment of the present application. Figure 21As shown, the automatic loading and unloading device 500 of this embodiment specifically comprises a feed chain station 523, a tilting and unloading mechanism, a discharge chain station 524, a feeding mechanism, a bracket 521, and a clean room. The automatic loading and unloading device 500 is used for automatic unloading, loading, and weighing of molybdenum boats. The feed chain station 523 includes a chain transmission mechanism and a weighing system to receive and automatically weigh fully loaded molybdenum boats. The tilting and unloading mechanism includes a translation mechanism, a clamping mechanism, and a tilting mechanism to transport, tilt, and unload the molybdenum boats. The material in the molybdenum boat falls into a collection cone, which connects to downstream processes to achieve material transfer. The discharge chain station 524 includes a chain transmission mechanism and a weighing system, enabling the molybdenum boat to be received and automatically weighed. A feeding device is installed on top of the weighing station 524. This feeding device primarily includes a temporary storage bin 522, a dosing valve, and a feeding tube. The temporary storage bin 522 receives material from the previous process and interlocks with the upstream process to prevent excessive material in the temporary storage bin 522. The dosing valve evenly adds material to the boat, and the material falls through the feeding tube into the molybdenum boat. Bracket 521 is crafted from stainless steel, with no dead corners inside, making it easy to clean. To prevent dust from escaping, a sealing cover can be installed on top of bracket 521, with sealing doors on both sides.

[0091] In some embodiments of the present invention, the sintering system includes an atmosphere control subsystem, which includes a cooling gas generating module, a purge gas generating module, a cooling gas supply pipe and a purge gas supply pipe. The cooling gas generating module is used to transport cooling gas to the cooling gas supply pipe, and the cooling gas output by the cooling gas supply pipe is used to cool each of the moving beam modules. The purge gas generating module is used to transport purge gas to the purge gas supply pipe, and the purge gas output by the purge gas supply pipe is used to purge the feed sealing chamber 130 and the discharge sealing chamber 420.

[0092] Exemplarily, the atmosphere control system may include hydrogen and nitrogen supply systems, a gas analysis system, and an exhaust gas combustion system. The hydrogen supply system primarily includes a hydrogen supply pipeline, a moving beam box cooling hydrogen pipeline, and a main bearing cold zone pipeline at the mesh belt turntable 310. There are two process hydrogen supply points, located at the mesh belt drive station 320 and the turntable, respectively. Mass flow meters enable remote flow adjustment and monitoring. The nitrogen supply system primarily includes a purge system for the inlet and outlet sealed chamber 420, a nitrogen purge system for the heating electrode junction boxes in the pre-burning zone 210 and high-temperature zone 220, and a process nitrogen system. Process nitrogen is fed into the hydrogen supply pipeline via a mass flow meter and a check valve, enabling remote flow adjustment and monitoring.

[0093] The emergency nitrogen supply point is located at the mesh belt drive station 320 and the rear section of the high temperature zone 220. The mesh belt drive station 320, the mesh belt rotary station 310, and the rear section of the high temperature zone 220 can each be equipped with an oxygen analyzer to online detect the oxygen content of the hydrogen atmosphere. In addition, a dew point meter can be installed at the rear section of the high temperature zone 220. The tail gas combustion system includes two tail gas combustion towers 600. Automatic regulating butterfly valves are installed on the pipeline to automatically adjust the furnace pressure. This embodiment can remotely adjust the valve opening or closing of the automatic regulating butterfly valve. During automatic operation, PID control is used to ensure the stability of the furnace pressure. In addition, the spare pipeline is equipped with a manual regulating butterfly valve. The tail gas emission pipelines are all insulated to prevent the deposition of volatiles. The tail gas combustion uses ceramic resistance elements, which dually monitor the flame through temperature and current, and have automatic ignition and extinction protection functions. When the temperature is lower than 150°C (or the set value), the interlock alarm cuts off the hydrogen and automatically starts the nitrogen purge.

[0094] In one embodiment, the moving beam module includes a moving beam driving component, a transmission assembly, and a walking beam. The moving beam driving component can drive the walking beam to move up and down and move horizontally through the transmission assembly. Figure 23 As shown, the position where the moving beam module is aligned with the stationary beam is set as the zero point. The moving beam module's low position is -20mm, its high position is +20mm, and its total lifting stroke is 40mm, with a forward and backward travel of 375mm. To ensure the working stroke, the actual mechanism allows a maximum lifting stroke of 76mm and a maximum forward and backward travel of 400mm. The lifting and lowering of the moving beam can be driven by a SEW braked reduction motor. This motor drives a set of parallel crank-arm linkages. The crank arms within the moving beam module's moving beam box consist of a wheel assembly with built-in high-temperature bearings. The moving beam is mounted horizontally above this wheel assembly. The parallel crank arms within the moving beam box rotate and swing synchronously, lifting the bottom of the moving beam and achieving its lifting and lowering motion. The forward and backward movement of the moving beam module can also be achieved by a SEW braked reduction motor driving the crank-arm linkage mechanism. The rotation and swinging of the outer linkage mechanism drives the swinging of the connecting rods within the moving beam box. The moving beam is mounted horizontally above the horizontal wheel assembly of the lifting mechanism. The moving beam acts as a slider mechanism, so the crank arm swing driven by the reduction motor drives the forward and backward movement of the moving beam. In addition, the lifting and horizontal movement speed and displacement of the movable beam can be converted into the angular velocity and angular displacement of the reduction motor according to the crank arm connecting rod mechanism.

[0095] The sintering system of the above-described embodiment of the present invention is primarily used for sintering 0.6mm pellets to be sintered. Its workflow involves the feed distribution assembly 110 of the automatic loading and unloading device 500 quantitatively transferring the 0.6mm pellets to be sintered from a barrel or silo into a boat. The boat containing the 0.6mm pellets to be sintered is then delivered into the hearth of the sintering furnace 200 via the feeding device 100. Sintering is completed in a hydrogen atmosphere according to a specific process schedule and boat movement speed. After sintering, the boat enters a cooling section and is then removed from the furnace. The discharge distribution assembly of the automatic loading and unloading device 500 automatically collects the material in the boat into a barrel or silo, producing sintered pellets that meet the required technical specifications, such as density and surface quality.

[0096] In the above embodiment, the sintering system adopts a walking beam type, with a rated sintering temperature of 1700°C, an operating temperature of 1600°C, and a bulk density of 3.4 g / cm 3 The 0.6mm sintered particles are cooled by hydrogen, the cooling medium of the moving beam module in the furnace is hydrogen, the purge gas of the inlet and outlet sealed chamber 420 is nitrogen, the furnace atmosphere is 100% H2, N2 is used for purge and emergency protection, and the pressure is slightly positive (0.2-2.0kPa). The outer dimensions of the molybdenum boat are: 330 (length) mm × 330 (width) mm × 120 (height) mm, the thickness of the molybdenum plate is ≥3mm, and the maximum loading capacity (volume) of a single boat is 10497cm 3 The maximum loading capacity (weight) of a single boat is 10497*3.4 = 35.689kg. The operating rate is one boat per hour, with a production capacity of 720kg / d. The sintering furnace 200 consists of a pre-sintering zone 210 and a high-temperature zone 220, with lengths of 4520mm and 6990mm respectively. The pre-sintering zone 210 has three heating sections, each 750mm long; the high-temperature zone 220 has four heating sections, each 1235mm long. The pre-sintering zone and high-temperature zone 220 each have independent furnace covers 240, equipped with convenient lifting devices for the furnace covers 240, allowing for separate maintenance of the pre-sintering zone and high-temperature zone 220. The furnace pressure in the sintering furnace 200 is controlled by PID, operating in a slightly positive state. The furnace pressure is automatically controlled within a range of (0.2-2.0)kPa, with a pressure fluctuation deviation of ±0.05kPa. If the furnace pressure falls below 0.2kPa, an interlock alarm will shut off the hydrogen flow and automatically initiate a nitrogen purge. If the furnace pressure rises above 2.0kPa, an interlock alarm will trigger and the pressure will automatically adjust. Exhaust gas from the sintering furnace 200 must be ignited by the heating element before being discharged into the ventilation system. Each heating element 230 is equipped with a thermocouple for temperature monitoring and current short-circuit detection. If the ignition device measures a temperature below the set lower limit or a current short-circuit occurs in the heating element 230, the hydrogen flow is automatically shut off and a nitrogen purge is initiated. The cables surrounding the exhaust ignition cover are designed to be high-temperature, heat-resistant wire. Each ignition device is equipped with an independent UPS power supply, which must operate under load for at least 30 minutes.

[0097] The sintering furnace 200 of the sintering system of the present application utilizes a sealed furnace shell, which does not tolerate air leakage. Therefore, thermal short-circuit losses in the furnace lining are primarily caused by thermal short-circuits between the furnace brickwork and the metal support frame, as well as losses in the electrodes and thermocouples. Because precise calculation of the heat loss rate due to thermal short-circuit in the furnace lining is difficult, a rough calculation can be used.

[0098] In one embodiment, the sintering system also has an electrical control part, which may specifically include feed control, moving beam control, discharge control, heating control, atmosphere control, cooling control, alarm control, PLC (programmable logic controller) (HMI), industrial computer, human-machine interface, and fault diagnosis control.

[0099] The hardware of the electrical control section mainly includes a power supply cabinet, a main control cabinet, heating cabinets for each hot zone, relay boxes, wiring bridges, external wiring, and actuators. The cabinet body is made of high-quality steel plates. When the cabinet width is greater than 500mm and less than 800mm, the steel plate thickness must be no less than 1.2mm; when the cabinet width is greater than 800mm, the steel plate thickness must be no less than 1.5mm. The cabinet air conditioner is side-mounted to ensure that the temperature inside the cabinet does not exceed 35°C. Lighting components are installed in the cabinet, and the cabinet door has a door contact switch and an A4 data frame. The cabinet top is equipped with a lifting ring and the bottom is equipped with a removable wire board. The components inside the cabinet are reliably grounded, and a dedicated grounding copper busbar is installed.

[0100] The structural diagram of the electrical control cabinet is as follows Figure 22 As shown, the electrical control cabinet consists of, from left to right, a power supply cabinet, a heating cabinet, a frequency converter cabinet, a PLC cabinet, and an industrial control cabinet. The ignition system is equipped with a separate on-site control box (including the igniter temperature control system and operation panel) and a UPS power supply. The feed control, beam control, and discharge control are integrated into the PLC cabinet. For ease of operation, the feed and discharge sections can each be equipped with a separate on-site control box (including control buttons and an operation panel). The electrical control section is equipped with a separate UPS power supply, which can power the instrument panel, PLC, industrial computer, touch screen, host computer, control valves, and necessary motors in the event of an emergency power outage.

[0101] Each zone of the sintering furnace 200 is equipped with an independent heating cabinet, and each zone's heating cabinet panel is equipped with an ammeter. Each heating cabinet is equipped with a fuse, thermostat, and power regulator. To ensure heating control, the heating control method uses JUMO intelligent instrument automatic temperature control, which has a PID parameter self-tuning function. Through self-tuning, it selects and executes the optimal PID operating parameters, improving the equipment's control accuracy. Each heating zone is independently controlled; the heating power control section uses a power regulator to adjust the heating power of each heater section. The full range of digital thyristor power controllers adopts a fully digital design, with a rich parameter setting, detection and comprehensive protection functions. The temperature control system is controlled by the temperature control circuits of the JUMO thermostat, Siemens S7 programmable controller, and JUMO automatic temperature limiter. LED digital display and button parameter settings are communicated via RS485, and some key parameters of each zone can be displayed on the touch screen.

[0102] The electrical control unit primarily monitors, displays, and records device operating parameters, enabling online parameter setting, real-time process simulation, result display, and alarm processing. The master controller also displays real-time historical records, provides detailed PLC alarm information, and offers corresponding handling suggestions. Multi-level authority management is also available. The device administrator holds the highest authority and can set and operate all parameters. Two levels of passwords are also set: administrator and operator.

[0103] Internal communication protocols utilize PROFINET / MODBUS-TCP, MODBUS-RTU / PROFIBUS-DP, and OPC-UA. To enable data exchange between the complete equipment set and the distributed control system (DCS) and data acquisition and integration systems, the PLC and external devices utilize the MODBUS-TCP protocol. The PLC and host computer hardware used in the equipment utilize two independent sets of network hardware (i.e., the PLC is equipped with a single CP communication module, and the host computer is equipped with dual network cards) for interconnection with the project's information system.

[0104] In the sintering system of the above embodiment, if the material boat storage position of the feeding device 100 and the discharging device 400 is vacant for more than 5 minutes, or the furnace door of the sintering furnace 200 is not opened or closed within 1 minute, or the moving beam is not in place, an operation process alarm is activated; if the moving beam drive motor is overloaded, the stepping moving beam drive overload alarm is activated; if the measured temperature in the sintering furnace 200 is higher than the maximum temperature setting value, the temperature overtemperature alarm is activated and the heating action of the zone is stopped; if the measured temperature is higher than the high alarm setting value, the temperature high alarm is activated; if the measured temperature is lower than the low alarm setting value, the temperature low alarm is activated. If the cooling water flow rate is lower than the setting value, or the cooling water pressure is lower than the setting value, or the cooling return water temperature is higher than the setting value, the cooling water flow low alarm, pressure low alarm, and return water high alarm are respectively activated, and the emergency water supply is automatically switched. When the nitrogen pressure is lower than the low alarm setting value, the nitrogen pressure low alarm is activated; when the hydrogen pressure is lower than the low alarm setting value, the hydrogen pressure low alarm is activated and the emergency nitrogen purge is interlocked. When the hydrogen flow rate falls below the low alarm setting, the low hydrogen flow alarm activates and an emergency nitrogen purge is interlocked. When the nitrogen flow rate falls below the low alarm setting, the low nitrogen flow alarm activates. When the oxygen analyzer reading is abnormal, the oxygen analyzer reading alarm activates and an emergency nitrogen purge is interlocked. When the exhaust gas ignition temperature or exhaust gas ignition device fails, the exhaust gas ignition alarm activates and an emergency nitrogen purge is interlocked. When the furnace pressure falls below the low alarm setting, the furnace pressure alarm activates and an emergency nitrogen purge is interlocked. When the furnace pressure exceeds the high alarm setting, the furnace pressure alarm activates. In addition to the above, emergency stop alarms, power outage alarms, and sensor detection abnormality alarms can also be set.

[0105] It should be understood that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted. In the above embodiments, several specific steps are described and illustrated as examples. However, the method of the present invention is not limited to the specific steps described and illustrated. Those skilled in the art may make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present invention.

[0106] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or replace features of other embodiments.

[0107] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations to the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A sintering system, characterized in that: The sintering system includes a feeding device, a sintering furnace, a cooling device and a discharging device. The feeding device includes a feeding distribution assembly, a molybdenum boat feeding moving assembly, a feeding sealing chamber, a feeding push rod mechanism and a feeding heat insulation gate valve. The molybdenum boat feeding moving assembly is located between the feeding distribution assembly and the feeding sealing chamber. The molybdenum boat feeding moving assembly is used to transport the molybdenum boat containing the material to be sintered to the feeding sealing chamber. The feeding heat insulation gate valve is located between the feeding sealing chamber and the sintering furnace. The feeding push rod mechanism is used to push the molybdenum boat in the feeding sealing chamber to the sintering furnace. The sintering furnace includes a pre-burning zone and a high-temperature zone, each of which includes a furnace body, a movable beam module, and a heating element. The movable beam module and the heating element are both located in the furnace body. The movable beam module is used to transport the molybdenum boat, and the heating element is used to heat the furnace body. The pre-burning zone is located on a side of the feed insulation gate valve away from the feed push rod mechanism, and the high-temperature zone is located on a side of the pre-burning zone away from the feed insulation gate valve. The cooling device is located on a side of the high temperature zone away from the pre-burning zone, and the cooling device includes a cooling assembly and a mesh belt transmission assembly, and the cooling assembly is used to cool the material boat on the mesh belt in the mesh belt transmission assembly; The discharging device includes a discharging insulation gate valve, a discharging sealing chamber, a molybdenum boat discharging moving assembly and a discharging cloth assembly. The discharging insulation gate valve is located between the cooling device and the discharging sealing chamber, the molybdenum boat discharging moving assembly is located on the discharge port side of the discharging sealing chamber, and the discharging cloth assembly is located at the end of the molybdenum boat discharging moving assembly.

2. The sintering system according to claim 1, characterized in that The sintering system includes an atmosphere control subsystem, which includes a cooling gas generating module, a purge gas generating module, a cooling gas supply pipeline and a purge gas supply pipeline. The cooling gas generating module is used to transport cooling gas to the cooling gas supply pipeline, and the cooling gas output by the cooling gas supply pipeline is used to cool each of the moving beam modules. The purge gas generating module is used to transport purge gas to the purge gas supply pipeline, and the purge gas output by the purge gas supply pipeline is used to purge the feed sealing chamber and the discharge sealing chamber.

3. The sintering system according to claim 1, characterized in that: The moving beam module includes a moving beam driving component, a transmission assembly and a walking beam, and the moving beam driving component can drive the walking beam to move up and down and horizontally through the transmission assembly; and / or, The pre-firing zone includes a natural temperature rising section, a plurality of first heating sections and a first transition section, and the high temperature zone includes a second transition section and a plurality of second heating sections.

4. The sintering system according to claim 1, characterized in that: The molybdenum boat feeding moving assembly includes a feeding bracket, a first driving component, a sprocket chain mechanism, a roller conveying mechanism and a limiting component. The first driving component, the sprocket chain mechanism, the roller conveying mechanism and the limiting component are all arranged on the feeding bracket. The first driving component drives the sprocket chain mechanism and the roller conveying mechanism, and the limiting component is used to limit the material boat.

5. The sintering system according to claim 1, characterized in that: The feed push rod mechanism includes a second driving component, a gear rack mechanism and a push rod, and the second driving component drives the push rod to move horizontally through the gear rack mechanism; and / or, The feed thermal insulation gate valve includes a gate door, a third driving component and a position detection component. The third driving component is used to drive the gate door to rise and fall, and the position detection component is used to detect the position information of the gate door.

6. The sintering system according to claim 3, characterized in that: The natural heating section completes the temperature rise from room temperature to 800 degrees. The number of the first heating sections is three. The three first heating sections complete sintering at 800 degrees. The first transition section and the second transition section complete the temperature rise from 800 degrees to 1100 degrees. The number of the second heating sections is four. The four second heating sections include a first uniform temperature section, two high-temperature sections and a second uniform temperature section. The first uniform temperature section completes the uniform temperature of 1100 degrees. The two high-temperature sections complete the sintering from 1100 degrees to 1600 degrees. The second uniform temperature section completes the uniform temperature of 1600 degrees.

7. The sintering system according to claim 1, characterized in that: The mesh belt transmission assembly includes a mesh belt turntable and a mesh belt drive station. The mesh belt turntable is connected to the discharge port of the high-temperature zone. The mesh belt drive station includes a mesh belt drive wheel, a mesh belt tensioning wheel and a mesh belt displacement measuring component. The mesh belt drive wheel is provided with a rotary encoder. The mesh belt displacement measuring component is used to measure the moving distance of the mesh belt. The cooling assembly is a water-cooling assembly, and a cooling jacket is provided between the discharge port of the high-temperature zone and the mesh belt turntable.

8. The sintering system according to claim 1, characterized in that: The molybdenum boat discharging moving assembly comprises a discharging bracket, a chain translation mechanism, and a moving trolley, and the chain translation mechanism and the moving trolley are both arranged on the discharging bracket.

9. The sintering system according to claim 1, characterized in that: The material discharging and distributing assembly includes a material discharging and weighing assembly and a grabbing mechanism. The material discharging and weighing assembly is used to weigh the material boat, and the grabbing mechanism is used to grab the material boat to the material discharging position.

10. The sintering system according to claim 2, characterized in that: The sintering system includes a tail gas combustion tower, the air inlet end of the tail gas combustion tower is connected to the tail gas output end of the sintering furnace through a tail gas discharge pipe, the outside of the tail gas discharge pipe is provided with an insulation layer, and the tail gas discharge pipe is provided with an automatic regulating butterfly valve.

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