Continuous sintering system and production process

Abstract

The continuous sintering system comprises a shell, a kiln, a conveying assembly, a discharging assembly and a discharging pipe, the interior of the shell is hollow, a discharging opening is formed in the shell, the kiln is arranged in the shell, and a discharging cavity, a heating cavity, a heat preservation cavity and a cooling cavity which are sequentially arranged and communicate with one another are formed in the kiln; the conveying assembly comprises a conveying belt, the conveying belt is arranged in the shell, partially penetrates through the kiln and is used for circularly conveying materials in the arrangement direction of the discharging cavity, the heating cavity, the heat preservation cavity and the cooling cavity, the discharging assembly comprises a discharging device, the discharging device is connected to the shell, the discharging end of the discharging device is arranged opposite to the conveying belt, and a discharging pipe is connected to the discharging port. The sagger can effectively solve the problem that due to the fact that the effective space in a kiln structure is excessively occupied by the sagger, the actual material loading capacity in unit volume is reduced, and the sintering yield is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of positive electrode material preparation, and particularly relates to a continuous sintering system and production process. BACKGROUND

[0002] As a key link in the production of positive electrode materials, the performance of the core equipment, i.e. the kiln, directly affects the electrochemical performance and batch consistency of the materials. At present, the equipment commonly used for the calcination treatment of positive electrode materials is a calcination furnace.

[0003] A sintering device for battery positive electrode materials for new energy vehicle production is disclosed in Chinese patent application CN112361804A, which comprises a supporting mechanism for supporting and a transmission mechanism for transmitting as well as a rotating heat receiving mechanism for rotating and receiving heat for the positive electrode materials. A processing mechanism is installed on the supporting mechanism, and the transmission mechanism is arranged on the inner side of the processing mechanism. The rotating heat receiving mechanism is arranged between the transmission mechanisms, and a partition mechanism is arranged between the processing mechanisms. A power mechanism is connected to the power end of the transmission mechanism, and a transmission mechanism is installed on the transmission mechanism. The device uses staged sintering and cooling to ensure the sintering quality and improve the work efficiency. Meanwhile, the rotating characteristics of the overall structure of the rotating heat receiving mechanism improve the heating and heat dissipation effect of the positive electrode materials and improve the processing quality.

[0004] However, the existing roller furnace generally adopts a saggar loading circulation system, and the saggar is often stacked in a double-row double-layer manner in the kiln structure, so that the effective space in the kiln is occupied too much by the saggar itself, reducing the actual material loading capacity in the unit volume, thereby limiting the sintering yield. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provides a continuous sintering system and production process to solve the technical problem of low sintering yield caused by the fact that the effective space in the kiln structure is occupied too much by the saggar itself, thereby reducing the actual material loading capacity in the unit volume.

[0006] To achieve the above technical purposes, the present application adopts the following technical solutions: In a first aspect, the present application provides a continuous sintering system, comprising: a housing, which is hollow inside and is formed with a discharge port; a kiln, which is built-in the housing, and the interior of the kiln has a lower chamber, a heating chamber, a heat preservation chamber and a cooling chamber arranged in sequence and communicating with each other; a conveying assembly, comprising a conveying belt, which is built-in the housing and partially penetrates the kiln, for circulating conveying materials along the arrangement direction of the lower chamber, the heating chamber, the heat preservation chamber and the cooling chamber; The discharging assembly comprises a discharger connected to the shell and having a discharging end arranged opposite to the conveying belt; and A discharging pipe is connected to the discharging port.

[0007] In some embodiments, the shell is internally formed with a containing cavity, and the volume of the containing cavity gradually decreases along a direction close to the discharging port.

[0008] In some embodiments, the shell is further formed with a feeding port in communication with the containing cavity, the discharger is movably arranged in the kiln, and the discharging assembly further comprises a discharging hopper, a telescopic connecting hose and a first linear driving part. The discharging hopper is connected to the shell. The two ends of the telescopic connecting hose are respectively in communication with the discharging hopper and the discharger. The first linear driving part is connected to the kiln and the discharger, and is used to drive the discharger to slide relative to the kiln along a direction perpendicular to the material conveying direction of the conveying belt.

[0009] In some embodiments, the discharging assembly further comprises a scraping plate arranged above the material conveying path of the conveying belt and connected to the kiln, and a scraping gap is formed between the scraping plate and the belt of the conveying belt.

[0010] In some embodiments, the discharging assembly further comprises a second linear driving part having a fixed end and a telescopic end. The fixed end of the second linear driving part is connected to the inner wall of the kiln, and the telescopic end is connected to the scraping plate. The second linear driving part is used to drive the scraping plate to move close to or away from the conveying belt, so as to adjust the size of the scraping gap.

[0011] In some embodiments, the continuous sintering system further comprises at least one cleaning assembly. The cleaning assembly comprises a cleaning brush arranged below the conveying belt and connected to the shell, and the cleaning brush is capable of abutting against the conveying belt.

[0012] In some embodiments, the cleaning assembly further comprises a fixed support, an air flow nozzle and an air inlet hose. The fixed support is connected to the shell and the cleaning brush. The air flow nozzle is arranged opposite to the conveying belt and connected to the fixed support. One end of the air inlet hose is in communication with the air flow nozzle, and the other end is in communication with an external air supply device.

[0013] In some embodiments, the continuous sintering system further comprises an exhaust assembly. The exhaust assembly comprises an induced draft fan, an incinerator and an exhaust pipeline. The induced draft fan is connected to the shell, and the air inlet end of the induced draft fan is in communication with the interior of the kiln. The air inlet end of the incinerator is in communication with the air outlet end of the induced draft fan, and the air outlet end of the incinerator is in communication with the exhaust pipeline.

[0014] In some embodiments, the continuous sintering system further comprises an air inlet pipe connected to the shell and having one end communicated with the discharging cavity and the other end communicated with an external air supply device.

[0015] In a second aspect, the present application further provides a continuous sintering production process using the continuous sintering system as described above, comprising the following steps: a pretreatment stage, the kiln is replaced with gas by using the air inlet pipe, and the heating system of the heating cavity and the holding cavity is started; discharging, the conveyor belt is started, the material is discharged onto the conveyor belt by the discharger, and is scraped flat under the action of the scraper; sintering, the material enters the heating cavity, the holding cavity and the cooling cavity in turn along with the conveyor belt to perform sintering; tail gas treatment, the tail gas in the kiln is treated in the incinerator by the induced draft fan and is collected and treated by the tail gas pipeline.

[0016] Compared with the prior art, the continuous sintering system and production process provided by the present application have the following beneficial effects: the interior of the shell is provided with a kiln, the interior of the kiln is provided with a discharging cavity, a heating cavity, a holding cavity and a cooling cavity arranged in sequence and communicated with each other, a conveyor belt is built-in the shell and partially penetrates the kiln, and is used to circulate and convey the material along the arrangement direction of the discharging cavity, the heating cavity, the holding cavity and the cooling cavity, the material is discharged onto the conveyor belt by the discharger and is sequentially subjected to sintering and cooling in the heating cavity, the holding cavity and the cooling cavity, the cooled material is separated from the conveyor belt under the action of gravity and is collected in the shell, and finally is discharged through the discharge pipe. Compared with the prior art, the material is directly discharged onto the conveyor belt by the discharger, is circulated and conveyed along the arrangement direction of the heating cavity, the holding cavity and the cooling cavity, and can be sintered and cooled during the conveying process, and the cooled material can be automatically separated from the conveyor belt under the action of gravity. The structure reduces the setting of the sagger, avoids the sagger from occupying the space for distributing the material on the conveyor belt, saves the production cost, the material is heated more uniformly when passing through the heating cavity, the sintering efficiency is improved, and the technical problem of low sintering yield caused by the fact that the effective space in the structure of the kiln is occupied too much by the sagger itself, thereby reducing the actual material loading capacity per unit volume, is solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a continuous sintering system and production process provided by an embodiment of the present application.

[0018] BRIEF DESCRIPTION OF REFERENCE NUMERALS Shell 100; kiln 200; conveying assembly 300; discharging assembly 400; discharging cavity 210; heating cavity 220; holding cavity 230; cooling cavity 240; conveying belt 310; discharger 410; through support 320; discharging hopper 420; telescopic connecting hose 430; first linear driving part 440; scraper 450; first linear driving part 460; cleaning assembly 500; cleaning brush 510; fixed support 520; airflow nozzle 530; air inlet hose 540; tail gas assembly 600; induced draft fan 610; incinerator 620; tail gas pipeline 630; air inlet pipe 700; discharge pipe 800. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0020] In order to solve the technical problem that the actual material loading capacity in unit volume is reduced due to the fact that the effective space in the structure of the kiln 200 is occupied too much by the sagger itself, thereby resulting in low sintering yield, the present application provides a continuous sintering system and production process, which can realize direct discharging of the material onto the conveying belt 310 by the discharger 410, circulating conveying of the material along the setting direction of the heating cavity 220, the holding cavity 230 and the cooling cavity 240, and completion of sintering and cooling during the conveying process, and the cooled material can be automatically separated from the conveying belt 310 under the action of gravity. The structure reduces the setting of the sagger, avoids the occupation of the space for the distribution of the material on the conveying belt 310, saves production cost, and at the same time, the material is heated more uniformly when passing through the heating cavity 220, thereby improving the sintering efficiency.

[0021] Please refer to Figure 1 , Figure 1 It is a structural schematic view of a continuous sintering system and production process in an embodiment of the present application. The continuous sintering system comprises a shell 100, a kiln 200, a conveying assembly 300, a discharging assembly 400 and a discharge pipe 800. The shell 100 is hollow inside and has a discharge port. The kiln 200 is built-in the shell 100. The inside of the kiln 200 has a discharging cavity 210, a heating cavity 220, a holding cavity 230 and a cooling cavity 240 which are sequentially arranged and mutually communicated. The conveying assembly 300 comprises a conveying belt 310. The conveying belt 310 is built-in the shell 100 and partially penetrates the kiln 200, for circulating conveying of the material along the setting direction of the discharging cavity 210, the heating cavity 220, the holding cavity 230 and the cooling cavity 240. The discharging assembly 400 comprises a discharger 410. The discharger 410 is connected to the shell 100, and the discharge end of the discharger 410 is arranged opposite to the conveying belt 310. The discharge pipe 800 is connected to the discharge port.

[0022] In the present application, compared with the prior art, the material is directly discharged onto the conveying belt 310 by the discharger 410, and the conveying belt 310 circulates to convey the material along the setting direction of the heating cavity 220, the holding cavity 230 and the cooling cavity 240, and the sintering and cooling can be completed during the conveying process. The cooled material can be automatically separated from the conveying belt 310 under the action of gravity. This structure reduces the setting of the sagger, avoids the occupation of the space of the conveying belt 310 by the sagger, saves the production cost, and improves the sintering efficiency because the material is heated more uniformly when passing through the heating cavity 220. The technical problem of low sintering yield caused by the fact that the effective space in the structure of the kiln 200 is occupied too much by the sagger itself, thereby reducing the actual material loading capacity per unit volume, is solved.

[0023] Further, the kiln 200 is a commonly seen and easily purchased device in the market. For reference, the Chinese invention patent with the publication number CN112361804A and the name of Sintering device for battery positive material in new energy vehicle production can be referred to. The kiln 200 is sequentially formed with the discharging cavity 210, the heating cavity 220, the holding cavity 230 and the cooling cavity 240 along the length direction thereof. The heating system is arranged in the heating cavity 220, the holding cavity 230 and the cooling cavity 240, respectively. Details are not described herein.

[0024] Further, the conveying belt 310 is a commonly seen and easily purchased chain or belt transmission belt in the market. The conveying belt 310 is connected to the inner wall of the shell 100 through the support 320. The conveying belt 310 can withstand high temperature, and the conveying belt 310 penetrates through the outer wall of the kiln 200 and can convey the material along the setting direction of the discharging cavity 210, the heating cavity 220, the holding cavity 230 and the cooling cavity 240. The material in the discharging cavity 210 can sequentially pass through the heating cavity 220, the holding cavity 230 and the cooling cavity 240. The material after the cooling cavity 240 is turned over with the conveying belt 310 and falls from the conveying belt 310 to the bottom of the shell 100.

[0025] In the present embodiment, as shown in Figure 1 The inner part of the shell 100 is formed with a containing cavity, and the volume of the containing cavity gradually decreases along the direction close to the discharge port.

[0026] The inner part of the bottom of the shell 100 has a slope and forms a funnel-like structure, so that the material falling from the conveying belt 310 can slide into the discharge port along the slope, facilitating automatic unloading.

[0027] Further, the inner wall of the shell 100 is a smooth slope.

[0028] In one of the embodiments, please refer to Figure 1The shell 100 is further provided with a feeding port in communication with the accommodating cavity. The feeder 410 is movably arranged in the kiln 200. The feeding assembly 400 further comprises a feeding hopper 420, a flexible connecting hose 430 and a first linear driving part 440. The feeding hopper 420 is connected to the shell 100. The two ends of the flexible connecting hose 430 are respectively in communication with the feeding hopper 420 and the feeder 410. The first linear driving part 440 is connected to the kiln 200 and the feeder 410, and is used to drive the feeder 410 to slide relative to the kiln 200 in a direction perpendicular to the material conveying direction of the conveying belt 310.

[0029] The feeder 410 and the feeding hopper 420 are in communication through the flexible hose. The feeder 410 is connected to the first linear driving part 440, so that the feeder 410 can slide relative to the kiln 200 in a direction perpendicular to the material conveying direction of the conveying belt 310 under the driving of the first linear driving part 440. Therefore, the materials can be distributed on the conveying belt 310 in a wave shape or a sinusoidal curve shape, and the baking efficiency of the materials can be improved.

[0030] Further, the feeding hopper 420 is in the shape of an inverted horn and is connected to the shell 100, so as to facilitate feeding. The feeder 410 is a commonly used device in the market and is easy to purchase. The first linear driving part 440 is a commonly used hydraulic cylinder, air cylinder or push rod motor in the market. The feeder 410 and the first linear driving part 440 are both conventional settings known to those skilled in the art, and will not be described here.

[0031] In one embodiment, please refer to Figure 1 The feeding assembly 400 further comprises a scraping plate 450. The scraping plate 450 is arranged above the material conveying path of the conveying belt 310 and is connected to the kiln 200. A scraping gap is formed between the scraping plate 450 and the belt of the conveying belt 310.

[0032] The scraping plate is arranged relative to the belt of the conveying belt 310 and forms a scraping gap with the conveying belt 310. The materials move forward together with the belt of the conveying belt 310, are scraped flat by the scraping plate 450, and are evenly coated on the belt of the conveying belt 310, so as to improve the baking efficiency.

[0033] Further, the scraping plate is provided with a scraping end having an elastic structure relative to one end of the conveying belt 310. The scraping end can abut against the materials and scrape the materials flat.

[0034] In one embodiment, please refer to Figure 1The blanking assembly 400 further comprises a second linear driving part 460 having a fixed end and a telescopic end, the fixed end of the second linear driving part 460 is connected to the inner wall of the kiln 200, and the telescopic end is connected to the material scraping plate 450, for driving the material scraping plate 450 to move close to or away from the conveyor belt 310, so as to adjust the size of the scraping gap.

[0035] The second linear driving part is used to adjust the size of the gap between the scraping plate and the belt of the conveyor belt 310, so that the size of the gap can be adjusted according to the production demand and production efficiency in actual production, which will not be described here.

[0036] Further, the second linear driving part 460 is a common hydraulic cylinder, air cylinder and push rod motor on the market, which is a conventional setting known to those skilled in the art, and will not be described here.

[0037] In addition, in some embodiments, the blanking assembly 400 further comprises a laser range finder for measuring the gap between the scraping plate and the conveyor belt 310, which is a conventional setting known to those skilled in the art, and will not be described here.

[0038] In this example, as shown in Figure 1 The continuous sintering system further comprises at least one cleaning assembly 500, the cleaning assembly 500 comprises a cleaning brush 510, the cleaning brush 510 is arranged below the conveyor belt 310 and connected to the shell 100, and the cleaning brush 510 can abut the conveyor belt 310.

[0039] The cleaning assembly 500 comprises a cleaning brush 510, which is arranged below the conveyor belt. When the material on the conveyor belt 310 falls, the belt on the conveyor belt 310 continues to move forward and realizes circulation, and part of the conveyor belt 310 may be adhered with material residues. By abutting the cleaning brush 510 with the conveyor belt 310, the adhered material can be cleaned, thereby avoiding manual cleaning, waste of material or affecting production efficiency.

[0040] Further, the cleaning brush 510 is a common and easily purchased rubber brush on the market, which is a conventional setting known to those skilled in the art, and will not be described here.

[0041] In one embodiment, please refer to Figure 1 The cleaning assembly 500 further comprises a fixed support 520, an air flow nozzle 530 and an air inlet hose 540, the fixed support 520 is connected to the shell 100 and the cleaning brush 510, the air flow nozzle 530 is arranged relative to the conveyor belt 310 and connected to the fixed support 520, and one end of the air inlet hose 540 is in communication with the air flow nozzle 530 and the other end is in communication with an external air supply device.

[0042] The fixing support 520 is used for supporting and connecting the cleaning brush 510, improving the mobility of the lifting device, and improving the production efficiency.

[0043] Further, the air flow nozzle 530 is arranged relative to the belt on the conveying belt 310, and the material can be blown off by using the air flow, so that the cleaning effect is improved, and the air inlet hose 540 can supply external gas.

[0044] Further, the gas is nitrogen or other protective gas, which is a conventional arrangement known to those skilled in the art and will not be described here.

[0045] In addition, in some embodiments, the bristles of the cleaning brush 510 can be provided with a hollow structure, and nitrogen can be sprayed out through the bristles of the cleaning brush 510, which will not be described here.

[0046] In one embodiment, please refer to Figure 1 The continuous sintering system further comprises an exhaust component 600, the exhaust component 600 comprises an induced draft fan 610, an incinerator 620 and an exhaust pipeline 630, the induced draft fan 610 is connected to the shell 100, and the air inlet end of the induced draft fan 610 is connected to the inside of the kiln 200, the air inlet end of the incinerator 620 is connected to the air outlet end of the induced draft fan 610, and the air outlet end is connected to the exhaust pipeline 630.

[0047] The exhaust gas in the kiln 200 is introduced into the incinerator 620 by the induced draft fan, and the exhaust gas is discharged into the exhaust pipeline 630 for centralized treatment, so that the environmental pollution caused by the exhaust gas of the kiln 200 can be avoided.

[0048] Further, the induced draft fan 610, the incinerator 620 and the exhaust pipeline 630 are conventional arrangements known to those skilled in the art and will not be described here.

[0049] In one embodiment, please refer to Figure 1 The continuous sintering system further comprises an air inlet pipe 700, the air inlet pipe 700 is connected to the shell 100, and one end of the air inlet pipe 700 is connected to the discharging cavity 210 and the other end is connected to an external gas supply device.

[0050] The air inlet pipe 700 is used for providing nitrogen or other protective gas into the kiln 200.

[0051] Further, the nitrogen or other protective gas is a conventional arrangement known to those skilled in the art and will not be described here.

[0052] The application further provides a continuous sintering production process, which uses the above continuous sintering system and comprises the following steps: A pretreatment stage, The gas replacement of the kiln 200 is performed by using the air inlet pipe 700, and the heating system of the heating chamber 220 and the heat preservation chamber 230 is started; Blanking, The conveying belt 310 is started, the material is blanked by the blanker 410 on the conveying belt 310, and is scraped flat under the action of the scraper; Sintering, The material sequentially enters the heating chamber 220, the heat preservation chamber 230 and the cooling chamber 240 along with the conveying belt 310, and sintering is performed. Tail gas treatment, The tail gas in the kiln 200 enters the incinerator 620 and is treated, and is collected and treated by the tail gas pipeline 630.

[0053] Further, the equipment can be connected to the MES system, and the production state is monitored in real time by cooperating with the data acquisition of gravity, gas flow, temperature, air pressure, infrared and the like. The material state and working stability of the kiln 200 can be monitored through a visual window, full-process automatic production is realized, and the equipment is particularly suitable for high-quality sintering production of positive electrode materials such as phosphoric acid (manganese) iron lithium, and details are not repeated here.

[0054] In order to better understand the present application, the following is combined with Figure 1 The technical scheme of the present application is described in detail: The inside of the shell 100 is provided with the kiln 200, the inside of the kiln 200 has the blanking chamber 210, the heating chamber 220, the heat preservation chamber 230 and the cooling chamber 240 which are sequentially arranged and communicated with each other, the conveying belt 310 is built-in in the shell 100 and partially penetrates the kiln 200, and is used for circularly conveying the material along the arrangement direction of the blanking chamber 210, the heating chamber 220, the heat preservation chamber 230 and the cooling chamber 240, the material is blanked by the blanker 410 on the conveying belt 310, and sequentially passes through the heating chamber 220, the heat preservation chamber 230 and the cooling chamber 240 to complete sintering and cooling, the cooled material is separated from the conveying belt 310 under the action of gravity and is collected in the shell 100, and finally is discharged through the discharge pipe 800. Compared with the prior art, the material is directly blanked on the conveying belt 310 by using the blanker 410, the material is circularly conveyed along the arrangement direction of the heating chamber 220, the heat preservation chamber 230 and the cooling chamber 240 by the conveying belt 310, and sintering and cooling can be completed in the conveying process, and the cooled material can be automatically separated from the conveying belt 310 under the action of gravity. The structure reduces the setting of the sagger, not only avoids the sagger from occupying the space of the material distributed on the conveying belt 310 and saves the production cost, but also the material is heated more uniformly when passing through the heating chamber 220, and the sintering efficiency is improved.

[0055] The specific workflow of the present application is that before discharging, nitrogen is used to replace the air in the kiln 200 to ensure that the oxygen content in the kiln 200 meets the standard (for example: when preparing lithium iron phosphate (manganese), the oxygen content required when the material is sintered should be ≤10 ppm), then the heating system, exhaust system and cooling system of the kiln 200 are started, when the temperature reaches the preset temperature, the discharging assembly 400 is started, the material is uniformly laid from the discharging hopper 420 through the discharger 410, the discharger 410 moves uniformly and reciprocally in the main body of the kiln 200 in the transverse direction, at the same time, the high-temperature-resistant conveying belt 310 is uniformly driven, so that the falling material is uniformly distributed in a sine curve, and then the material is scraped and coated flat (the inclination angle of the scraper can be automatically adjusted in real time by a laser range finder).

[0056] Further, the uniformly scraped material passes through the heating chamber 220, the heat preservation chamber 230 (the heating adopts a main heating source U-shaped silicon molybdenum rod, and an embedded infrared heating pipe is combined to assist in compensating for edge heat loss, and the front end of the heating zone adopts rapid heating and the rear end adopts slow heating) and the cooling chamber 240 (the main body of the kiln 200 is connected with a 25 °C circulating water cooling coil pipe) in sequence at a uniform speed with the high-temperature-resistant conveying belt 310, and finally falls into the inside of the shell of the kiln 200 with the movement of the conveying belt 310, and then enters the discharge pipe 800 and is discharged into the next process.

[0057] Further, the sulfide, nitrogen oxide and inorganic matter tail gas generated after sintering of the material enters the incinerator 620 with the induced draft fan 610 for incineration, and after the incineration tail gas meets the standard, it is discharged or waste heat is recovered for secondary utilization, when the high-temperature-resistant conveying belt 310 runs to the furnace head side, the residual material powder is brushed down and falls into the discharge pipe 800 by the cleaning brush 510, nitrogen gas is blown out from the micropores in the middle of the brush for secondary strengthening cleaning, without the need for workers to clean again, and then enters the kiln 200 for circulation operation.

[0058] Compared with the traditional roller kiln 200, the present application adopts an integrated kiln 200, which reduces the occupied area by about 40 %, not only improving the space utilization, but also reducing the production cost; using the innovative double-path air inlet design, not only meets the demand of nitrogen atmosphere of the kiln 200, but also serves as a cleaning gas for cleaning the residual material on the high-temperature-resistant conveying belt 310; compared with the traditional up-down heat transfer system, the present design adopts a U-shaped silicon molybdenum rod as the main heating, and an infrared auxiliary compensation composite heating scheme, which can improve the uniformity of material heating.

[0059] Further, the scheme discards the traditional saggar loading, and adopts a movable feeder 410 to cooperate with the conveying belt 310 to control the sinusoidal curve loading, and complete the uniform distribution of materials through the scraper plate 450. In addition, the laser ranging can adjust the scraper plate 450 in real time, which not only realizes the uniform heating of the materials, but also shortens the production cycle and reduces the production cost. The rotary brush cooperates with the nitrogen blowing (0.3 MPa) to strengthen the cleaning strength, and there is no need for manual secondary cleaning.

[0060] The system can solve the technical problem of low sintering yield caused by the fact that the effective space in the structure of the kiln 200 is occupied too much by the saggar itself, thereby reducing the actual material loading capacity per unit volume.

[0061] The specific embodiments of the application described above do not constitute a limitation on the scope of protection of the application. Any various other corresponding changes and modifications made according to the technical concept of the application shall be included in the scope of protection of the claims of the application.

Claims

1. A continuous sintering system, characterized in that, include: The shell is hollow inside and has a discharge port. The kiln is built into the shell, and the interior of the kiln has a feeding chamber, a heating chamber, a heat preservation chamber and a cooling chamber arranged in sequence and connected to each other; The conveying assembly includes a conveyor belt, which is built into the housing and partially penetrates the kiln, for circulating and conveying materials along the orientation of the feeding chamber, heating chamber, heat preservation chamber and cooling chamber; The feeding assembly includes a feeder connected to the housing, and the discharge end of the feeder is positioned relative to the conveyor belt. as well as The discharge pipe is connected to the discharge port.

2. The continuous sintering system according to claim 1, characterized in that, The interior of the shell has a receiving cavity, and the volume of the receiving cavity gradually decreases along the direction close to the discharge port.

3. The continuous sintering system according to claim 2, characterized in that, The housing also has a feed inlet communicating with the receiving cavity. The feeder is movably built into the kiln. The feeding assembly also includes a feeding hopper, a telescopic connecting hose, and a first linear drive unit. The feeding hopper is connected to the housing. The two ends of the telescopic connecting hose are respectively connected to the feeding hopper and the feeder. The first linear drive unit is connected to the kiln and the feeder and is used to slide the feeder relative to the kiln along a material conveying direction perpendicular to the conveyor belt.

4. The continuous sintering system according to claim 3, characterized in that, The feeding assembly also includes a scraper, which is positioned above the material conveying path of the conveyor belt and connected to the kiln, with a scraping gap formed between the scraper and the belt of the conveyor belt.

5. The continuous sintering system according to claim 4, characterized in that, The feeding assembly further includes a second linear drive unit, which has a fixed end and a telescopic end. The fixed end of the second linear drive unit is connected to the inner wall of the kiln, and the telescopic end is connected to the scraper plate, which is used to drive the scraper plate to move closer to or further away from the conveyor belt to adjust the size of the scraper gap.

6. The continuous sintering system according to claim 2, characterized in that, The continuous sintering system further includes at least one cleaning component, which includes a cleaning brush disposed below the conveyor belt and connected to the housing, and the cleaning brush is capable of contacting the conveyor belt.

7. The continuous sintering system according to claim 6, characterized in that, The cleaning assembly also includes a fixed bracket, an airflow nozzle, and an air inlet hose. The fixed bracket is connected to the housing and the cleaning brush. The airflow nozzle is positioned relative to the conveyor belt and connected to the fixed bracket. One end of the air inlet hose is connected to the airflow nozzle, and the other end is connected to an external air supply device.

8. The continuous sintering system according to claim 2, characterized in that, The continuous sintering system also includes a tail gas assembly, which includes an induced draft fan, an incinerator, and a tail gas pipeline. The induced draft fan is connected to the shell, and the inlet end of the induced draft fan is connected to the interior of the kiln. The inlet end of the incinerator is connected to the outlet end of the induced draft fan, and the outlet end is connected to the tail gas pipeline.

9. The continuous sintering system according to claim 2, characterized in that, The continuous sintering system also includes an air inlet pipe, which is connected to the housing, with one end of the air inlet pipe connected to the feeding chamber and the other end connected to an external air supply device.

10. A continuous sintering production process, characterized in that, The continuous sintering system as described in any one of claims 1-9 includes the following steps: Preprocessing stage, The gas in the kiln is replaced by the air inlet pipe, and the heating system of the heating chamber and the heat preservation chamber is started. Feeding, Start the conveyor belt, the feeder feeds the material onto the conveyor belt, and the scraper flattens it; sintering, The material is sequentially fed into the heating chamber, the heat preservation chamber, and the cooling chamber via a conveyor belt for sintering; Exhaust gas treatment The exhaust gas inside the kiln is processed by the induced draft fan and then collected and treated by the exhaust gas pipeline.

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