A sintering system

Abstract

The present application relates to a kind of sintering systems, including sintering device, air supply device, feeding device, discharging cooling device and material receiving device, sintering device includes sintering furnace and combustion machine, sintering furnace is equipped with first air inlet, feeding port, first exhaust port and discharge port, first air inlet and discharge port are close to the bottom of sintering furnace, feeding port and first exhaust port are close to the top of sintering furnace;Air supply device is connected to the first air inlet of sintering furnace, for gas into sintering furnace;Feeding device is connected to the feeding port of sintering furnace, for the material to be sintered into sintering furnace;Discharge cooling device is connected to the discharge port of sintering furnace, for cooling and exporting after sintering material;Material receiving device is connected to the material output end of discharging cooling device, for collecting after cooling material.The sintering system of the present application can improve sintering quality, sintering efficiency and the height of sintering furnace can be relatively low.

Description

Technical Field

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

[0002] In my country's electronics, solar energy, powder metallurgy, display, and water filtration industries, a large amount of powdered non-metallic materials or rare metal powders are used. These powders need to be sintered in a high-temperature furnace before being put into use. A Chinese invention patent with authorization publication number CN115127338B discloses a sintering production line comprising a kiln, a kiln car conveyor line, a material receiving device, a material loading conveyor line, and a kiln loading and unloading device. The kiln car conveyor line includes multiple kiln car carriers that circulate along a closed-loop conveyor route. The conveyor route includes a sintering section and a loading and unloading section. The kiln is located in the sintering section for heating and sintering the saggers. The material receiving device is located upstream of the loading and unloading section for collecting the sintered material. The material loading conveyor line is located downstream of the loading and unloading section for loading empty saggers with the powdered material to be sintered. The kiln loading and unloading device is used to move the saggers between the kiln car carriers, the material receiving device, and the material loading conveyor line. In the aforementioned sintering production line, the sintered material is placed in a sagger. On the one hand, the sintered material easily sticks to the sagger during the sintering process, resulting in incomplete material reaction and a high level of impurities, which affects the sintering quality. On the other hand, the sintered material accumulates in the sagger, prolonging the sintering time and affecting the sintering efficiency. Improving sintering quality and efficiency is a pressing technical issue in this field. Summary of the Invention

[0003] To this end, the present invention provides a sintering system, which can improve the sintering quality and sintering efficiency and the height of the sintering furnace can be relatively low.

[0004] In order to solve the above technical problems, the present invention provides a sintering system, comprising:

[0005] A sintering device, comprising a sintering furnace and a burner for creating a high-temperature environment inside the sintering furnace, the sintering furnace being provided with a plurality of first air inlets for receiving gas, a feeding port for receiving material to be sintered, a first exhaust port for exhausting gas, and a discharge port for exhausting sintered material, the first air inlets and the discharge port being close to the bottom of the sintering furnace, the plurality of first air inlets being uniformly distributed on the side wall of the sintering furnace along a spiral direction with the vertical axis of the sintering furnace as the central axis, and the feeding port and the first exhaust port being close to the top of the sintering furnace;

[0006] an air supply device connected to the first air inlet of the sintering furnace and used for supplying gas into the sintering furnace;

[0007] A feeding device connected to the feeding port of the sintering furnace, used for feeding the material to be sintered into the sintering furnace;

[0008] A discharge cooling device connected to the discharge port of the sintering furnace for cooling and discharging the sintered material;

[0009] The material collecting device is connected to the material output end of the discharging cooling device and is used to collect the cooled material.

[0010] Furthermore, the sintering furnace is provided with a plurality of the feeding ports, and the plurality of the feeding ports are evenly distributed on the side wall of the sintering furnace along a circumferential direction with the vertical axis of the sintering furnace as the central axis.

[0011] Furthermore, the sintering device includes a plurality of the burners, and the plurality of burners are evenly distributed on the side wall of the sintering furnace along a spiral direction with the vertical axis of the sintering furnace as the central axis.

[0012] Furthermore, the sintering furnace is also provided with a vent for exhausting gas and an explosion-proof vent for relieving pressure. The vent and the explosion-proof vent are both provided on the side wall of the sintering furnace. A filter is connected to the vent, and an explosion-proof valve is connected to the explosion-proof vent.

[0013] Furthermore, the discharge cooling device includes a discharge pipe and an air cooling device and a water cooling device for forming a low-temperature environment inside the discharge pipe. The discharge pipe includes an air cooling section and a water cooling section connected up and down. The air cooling section is provided with a second air inlet for receiving gas and a second exhaust port for discharging gas. The air cooling device is connected to the second air inlet of the air cooling section for blowing cold air to the air cooling section, and the water cooling device is used for heat exchange with the water cooling section.

[0014] Furthermore, a discharge guide plate is provided at the bottom of the sintering furnace, and the discharge guide plate and the discharge pipe are both arranged at an angle. The discharge guide plate is used to guide the sintered material to slide into the discharge pipe by its own weight, and the discharge pipe is used to guide the material to pass in an inclined downward direction by its own weight.

[0015] Furthermore, it also includes a dust removal device and an exhaust cooling device, the air inlet of the dust removal device is connected to the first exhaust port of the sintering furnace through the exhaust cooling device, the air outlet of the dust removal device is connected to the first air inlet of the sintering furnace, and the exhaust cooling device is used to cool the gas before entering the dust removal device.

[0016] Furthermore, the second exhaust port of the sintering system is connected to the exhaust cooling device.

[0017] Furthermore, the exhaust cooling device is a jacketed air-cooling pipe.

[0018] The above technical solution of the present invention has the following advantages over the prior art: the sintering system described in the present invention can form an upward airflow in the sintering furnace by setting the first air inlet of the sintering furnace at a lower position. On the one hand, the upward airflow keeps the material in the sintering furnace in a moving and dispersed state, reducing the agglomeration problem of the material during the sintering process, and making it less likely to stick to the inner wall of the sintering furnace, so that the material is completely sintered and the sintering quality is guaranteed. Moreover, the material is heated evenly in a dispersed state, with a large heating area, thereby improving the sintering efficiency. On the other hand, the upward airflow increases the downward resistance of the material, prolongs the time the material stays in the sintering furnace, so that the height of the sintering furnace can be relatively low to achieve sufficient sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 is a schematic diagram of the sintering system of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the sintering furnace and the discharge pipe in the present invention;

[0022] Figure 3 Flow chart of the sintering method of the present invention.

[0023] Description of the accompanying drawings:

[0024] 11. Sintering furnace; 111. First air inlet; 112. Feeding port; 113. First exhaust port; 114. Discharge port; 115. Vent port; 116. Explosion-proof port; 12. Burner; 13. Discharge guide plate; 2. Air supply device; 3. Feeding device; 4. Discharge cooling device; 41. Discharge pipe; 411. Second air inlet; 412. Second exhaust port; 42. Water cooling equipment; 5. Receiving device; 6. Dust removal device; 7. Exhaust cooling device. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0026] See also Figures 1 to 3 FIG. 1 shows an embodiment of a sintering system disclosed in the present invention.

[0027] The above-mentioned sintering system includes:

[0028] The sintering device includes a sintering furnace 11 and a burner 12 for creating a high-temperature environment inside the sintering furnace 11. The sintering furnace 11 is provided with a first air inlet 111 for receiving gas, a feeding port 112 for receiving material to be sintered, a first exhaust port 113 for exhausting gas, and a discharge port 114 for outputting the sintered material. The first air inlet 111 and the discharge port are near the bottom of the sintering furnace 11, and the feeding port 112 and the first exhaust port 113 are near the top of the sintering furnace 11.

[0029] an air supply device 2 connected to the first air inlet 111 of the sintering furnace 11 and used to supply gas into the sintering furnace 11;

[0030] The feeding device 3 is connected to the feeding port 112 of the sintering furnace 11 and is used to feed the material to be sintered into the sintering furnace 11;

[0031] The discharge cooling device 4 is connected to the discharge port 114 of the sintering furnace 11 and is used to cool and discharge the sintered material;

[0032] The material collecting device 5 is connected to the material output end of the above-mentioned discharging cooling device 4 and is used to collect the cooled material.

[0033] In the above, the interior of the sintering furnace 11 is used for the sintering reaction to occur. The first air inlet 111 refers to the channel for gas to be input into the sintering furnace 11, the feeding port 112 refers to the channel for the material to be sintered to enter the sintering furnace 11, and the first exhaust port 113 refers to the channel for the gas in the sintering furnace 11 to be discharged. The first air inlet 111 and the first exhaust port 113 are respectively close to the bottom and top of the sintering furnace 11 to facilitate the formation of an upward airflow. The feeding port 112 and the discharge port 114 are close to the top of the sintering furnace 11 to facilitate the material to be sintered to pass through the sintering furnace 11 by its own weight. The burner 12 refers to a gas device that can produce a directional high-temperature flame, providing a high-temperature environment for the sintering furnace 11. The air supply device 2 is connected to the first air inlet 111 at the bottom of the sintering furnace 11 to transport gas into the sintering furnace 11. Specifically, this can be achieved by using a high-pressure fan or blower. The feeding device 3 puts material into the feeding port 112 at the top of the sintering furnace 11. The discharge cooling device 4 is used to receive the material output from the sintering furnace 11 and transport and cool the material. The material collecting device 5 is located at the material output end of the discharge cooling device 4 and collects the material. Specifically, it can be implemented using a material collecting bucket. When the material needs to be discharged, the material output end of the discharge cooling device 4 is opened to collect the material after sintering and cooling.

[0034] Specifically, the sintering method of the above sintering system includes the following steps:

[0035] S1, heating and ventilation, heating the sintering furnace 11 and introducing gas into the sintering furnace 11, so that the sintering furnace 11 reaches a preset temperature and forms an upward airflow;

[0036] S2, sintering, adding the material to be sintered into the sintering furnace 11, the material passes through the sintering furnace 11 by its own weight and is kept in a dispersed state and slowly descends under the blowing action of the airflow, and the material is sintered while passing through the sintering furnace 11;

[0037] S3, cooling. The sintered material continues to leave the sintering furnace 11 by its own weight and enters the discharge cooling device 4. The material passes through the discharge cooling device 4 by its own weight and is cooled when passing through the discharge cooling device 4.

[0038] Through the above technical solution, by setting the first air inlet of the sintering furnace at a lower position, an upward airflow can be formed in the sintering furnace 11. On the one hand, the upward airflow keeps the material in the sintering furnace 11 in a moving and dispersed state, reducing the agglomeration problem of the material during the sintering process, and making it less likely to stick to the inner wall of the sintering furnace 11, so that the material is completely sintered and the sintering quality is guaranteed. Moreover, the material is heated evenly in a dispersed state, and the heating area is large, thereby improving the sintering efficiency. On the other hand, the upward airflow increases the downward resistance of the material, prolongs the time the material stays in the sintering furnace 11, so that the height of the sintering furnace 11 can be relatively low to achieve sufficient sintering.

[0039] In this embodiment, the sintering furnace 11 is provided with a plurality of the first air inlets 111 , and the plurality of the first air inlets 111 are evenly distributed on the side wall of the sintering furnace 11 along a spiral direction with the vertical axis of the sintering furnace 11 as the central axis.

[0040] In the above description, the multiple first air inlets 111 are evenly distributed along the sidewall of the sintering furnace 11 in a spiral direction along the vertical axis (central axis). This can be understood as the first air inlets 111 being arranged in a spiral trajectory in the circumferential direction, for example, in a clockwise or counterclockwise direction, and staggered at a certain angle at different height levels. The first air inlets 111 are equally spaced in the circumferential direction and are distributed at a certain spacing (e.g., equal spacing or gradual spacing) in the height direction.

[0041] Specifically, gas enters the sintering furnace 11 from different locations around the circumference and height of the furnace 11, and the airflow spirals upward through the sintering furnace 11. After entering the sintering furnace 11, the material is lifted by the spiral upward airflow, generating centrifugal force to maintain spacing between particles.

[0042] Through the above technical solution, by setting up multiple first air inlets 111, the gas enters from air inlets at different heights and angles, forming a spiral upward airflow in the sintering furnace 11, so that the gas forms a vortex when entering the furnace, improving the uniformity of gas distribution, increasing the contact time and mixing uniformity of gas and material, and avoiding local airflow dead corners.

[0043] In this embodiment, the sintering furnace 11 is provided with a plurality of the feeding ports 112 , and the plurality of feeding ports 112 are evenly distributed on the side wall of the sintering furnace 11 along a circumferential direction with the vertical axis of the sintering furnace 11 as the central axis.

[0044] In the above description, multiple feeding ports 112 are evenly distributed along the circumference of the sintering furnace 11 along the vertical axis (central axis). This means that all feeding ports 112 are located on the circumference at the same horizontal height, and adjacent feeding ports are spaced equidistantly. The centerlines of all feeding ports 112 are equidistant from the central axis of the sintering furnace 11, ensuring uniform material delivery into the sintering furnace 11.

[0045] Specifically, the material to be sintered enters the sintering furnace 11 in a downwardly inclined direction and then spirals downward through the furnace 11. The inclined feed angle, combined with the spiral airflow trajectory, effectively eliminates the localized accumulation caused by vertical feeding and ensures complete reaction by extending the material's residence time in the high-temperature zone.

[0046] The above technical solution provides multiple feeding ports 112, allowing simultaneous feeding of material through multiple feeding ports 112, thereby evenly distributing the material circumferentially within the sintering furnace 11. This prevents localized accumulation or gaps in the material, improves feeding uniformity, ensures uniform material distribution, and prevents material from concentrating on one side, thereby ensuring a more stable sintering process. The downwardly inclined feeding direction prolongs the material's residence time within the sintering furnace 11, ensuring that the material is fully sintered.

[0047] In this embodiment, the sintering device includes a plurality of the burners 12 , and the plurality of burners 12 are evenly distributed on the side wall of the sintering furnace 11 along a spiral direction with the vertical axis of the sintering furnace 11 as the central axis.

[0048] In the above description, multiple burners 12 are evenly distributed along the sidewalls of the sintering furnace 11 in a spiral pattern along its vertical axis (central axis). The burners 12 are arranged in a spiral pattern circumferentially, with each burner 12 staggered at a certain angle relative to the layer above. They are also spaced at regular intervals in the vertical direction. Burners at the same height are spaced at equal angles, forming a three-dimensional, staggered heating network.

[0049] Through the above technical solution, the burners 12 are arranged in a spiral, and flames are sprayed into the sintering furnace 11 from different heights and angles to form a three-dimensional heating field, which can heat the material more evenly.

[0050] In this embodiment, the sintering furnace 11 is further provided with a vent 115 for discharging gas and an explosion-proof vent 116 for relieving pressure. The vent 115 and the explosion-proof vent 116 are both provided on the side wall of the sintering furnace 11. A filter is connected to the vent 115, and an explosion-proof valve is connected to the explosion-proof vent 116.

[0051] As mentioned above, vent 115 is used to discharge exhaust gases generated during the sintering process and maintain a stable pressure within the furnace. Located below the feed port 112, vent 115 is equipped with a filter (positive pressure within the cavity) to prevent backflow of exhaust gases during unloading, which can lead to material waste. An air blowing device can be added as needed to more evenly distribute material from the feed port into the furnace. The explosion-proof vent 116 is a pressure relief channel located on the sidewall of the sintering furnace 11. When the pressure within the sintering furnace 11 exceeds a preset value, the explosion-proof valve automatically opens.

[0052] Through the above technical solution, by providing the vent 115 and the explosion-proof vent 116 , precise control of the dynamic balance between the gas discharge flux and the pressure in the sintering furnace 11 is achieved, thereby avoiding pressure overload in the sintering furnace 11 .

[0053] In this embodiment, the above-mentioned discharge cooling device 4 includes a discharge pipe 41 and an air cooling device (not shown in the figure) and a water cooling device 42 for forming a low-temperature environment in the above-mentioned discharge pipe 41. The above-mentioned discharge pipe 41 includes an air cooling section and a water cooling section connected up and down. The above-mentioned air cooling section is provided with a second air inlet 411 for receiving gas and a second exhaust port 412 for discharging gas. The above-mentioned air cooling device is connected to the above-mentioned second air inlet 411 for blowing cold air into the above-mentioned air cooling section. The above-mentioned water cooling device 42 is arranged on the outside of the above-mentioned water cooling section for heat exchange with the above-mentioned water cooling section.

[0054] In the above description, the air-cooling section refers to the channel that initially cools high-temperature materials through gas flow. The water-cooling section refers to the channel that secondary cools materials through a cooling medium. The air-cooling equipment is the air supply equipment. The second air inlet 411 is the interface for delivering gas to the air-cooling section, which is used to apply a controllable airflow to the surface of the material. The water-cooling equipment 42 includes a water-cooling channel, which is a closed pipeline for circulating the cooling medium. Specifically, this can be achieved by using a layer or coil surrounding the side wall of the water-cooling section, which removes heat through a circulating liquid medium.

[0055] Specifically, when the material passes through the discharge pipe 41, it is first cooled by direct blowing and then cooled by heat exchange with the cooling medium. After the high-temperature sintered material enters the discharge pipe 41, it is first subjected to forced convection cooling, and the air flow penetrates the gaps between the materials and takes away the heat accumulated on the surface; then it enters the medium heat exchange stage, and by adjusting the flow and temperature of the cooling medium, the heat inside the material is conducted outward at a controllable rate, forming a gradual cooling process from the outside to the inside.

[0056] Through the above technical solution, by setting up air cooling equipment and water cooling equipment, the two cooling modes of air cooling and water cooling are combined and applied, heat is dissipated in stages, and thermal stress concentration is reduced.

[0057] In this embodiment, a discharge guide plate 13 is provided at the bottom of the sintering furnace 11. The discharge guide plate 13 and the discharge pipe 41 are both inclined. The discharge guide plate 13 is used to guide the sintered material to slide into the discharge pipe 41 by its own weight, and the discharge pipe 41 is used to guide the material to pass in an inclined downward direction by its own weight.

[0058] In the above description, the discharge guide plate 13 refers to the inclined flow-guiding structure installed at the bottom of the sintering furnace 11. This structure prevents material accumulation in the discharge port area by guiding the material to slide in a specific direction. The inclined arrangement of the discharge pipe 41 refers to a structure in which the entire channel is arranged in a downward-sloping structure. The inclination of the discharge pipe 41 forms a continuous path with the flow-guiding direction of the discharge guide plate 13. This structure utilizes gravity to maintain continuous material flow, preventing localized temperature unevenness caused by stagnation during cooling.

[0059] Specifically, the material passes through the discharge guide plate 13 and discharge pipe 41 in a downwardly inclined direction. The sintered, high-temperature material naturally slides down the inclined surface of the discharge guide plate 13, resulting in unpowered transport. The material then enters the similarly inclined discharge pipe 41, where it continuously moves along its length under the influence of gravity, dissipating heat evenly along the way. In this flow path, the material transfer from discharge to cooling requires no additional power.

[0060] Through the above technical solution, by setting the discharge guide plate 13 and the discharge pipe 41 to an inclined posture, the material transmission path forms a coherent gravity-driven system, and it will not pass through the discharge cooling device 4 too quickly.

[0061] In this embodiment, a dust removal device 6 and an exhaust cooling device 7 are further included. The dust removal device 6 is connected to the first exhaust port 113 of the sintering furnace 11 through the exhaust cooling device 7, and is used to separate dust from the dust-laden gas discharged from the sintering furnace 11. The exhaust cooling device 7 is used to form a low-temperature environment in the cooling pipe.

[0062] In the above text, dust removal device 6 refers to a device that achieves gas-solid separation, trapping dust particles in the gas through filtration or centrifugation. Exhaust cooling device 7 is a device that cools the hot, dusty gas to a temperature suitable for dust removal, preventing damage to subsequent equipment caused by high temperatures.

[0063] Specifically, the dust-laden gas exhausted from the sintering furnace 11 is cooled and dust-removed to produce clean gas. This clean gas is then fed into the sintering furnace 11 to aerate the material during sintering and / or fed into the discharge pipe 41 to cool the sintered material. The gas exhausted from the sintering furnace 11 is first cooled to prevent subsequent heat damage to the dust removal device 6. The cooled gas then enters the dust removal device 6. The purified gas passes through the air supply device 2 (blower) and is distributed to either the first air inlet 111 of the sintering furnace 11 or the second air inlet 411 of the discharge pipe 41, depending on the operating conditions.

[0064] Through the above technical solution, by setting up the dust removal device 6 and the exhaust cooling device 7, the waste gas generated during the material sintering and material cooling process is cooled and dusted. The waste gas generated during the sintering process and the cooling process can be recycled and will not pollute the environment.

[0065] In this embodiment, the second exhaust port 412 of the air-cooling section is connected to the exhaust cooling device 7 .

[0066] In the above, the second exhaust port 412 is a channel for discharging gas in the air-cooling section. The gas discharged from the second exhaust port 412 carries a certain amount of dust and residual heat, and enters the exhaust cooling device 7 and the dust removal device 6 for cooling and dust removal before being reused.

[0067] Specifically, the dust-laden gas discharged from the discharge pipe 41 is cooled and dust-removed to obtain clean gas, which is fed into the sintering furnace 11 for blowing the material during sintering and / or fed into the discharge pipe 41 for cooling the sintered material.

[0068] Through the above technical solution, by setting the second exhaust port 412 of the air-cooling section to be connected to the exhaust cooling device 7, the dust-containing gas generated during the cooling process is recycled and reused, avoiding environmental pollution.

[0069] In this embodiment, the exhaust cooling device 7 is a jacketed air-cooling pipe.

[0070] In the above, the jacketed air-cooled tube circulates cooling gas through the interlayer, and the cooling gas absorbs the heat of the gas to achieve non-contact cooling.

[0071] Specifically, the high-temperature dust-laden gas discharged from the sintering furnace 11 passes through the pipe of the inner shell of the jacketed air-cooling tube, and the cooling gas circulates in the interlayer space between the outer shell and the inner shell of the jacketed air-cooling tube, thereby expanding the heat exchange area and improving the heat transfer efficiency between the high-temperature gas and the cooling gas, while maintaining the airtightness of the gas flow path to prevent dust leakage.

[0072] Through the above technical solution, the exhaust cooling device 7 is set as a jacketed air-cooling pipe, which can reliably cool the discharged high-temperature gas so that the temperature of the cooled gas meets the requirements of the dust removal device 6.

[0073] In this embodiment, the preset temperature is 300°C-1300°C.

[0074] The core of sintering is to achieve metallurgical bonding between particles (such as forming neck connections) through gas-solid oxidation reactions and atomic diffusion. When the temperature is too low, the atomic kinetic energy is insufficient, the diffusion rate is slow, and only localized weak connections are formed between particles, or even a loosely packed state remains. At high temperatures, the atomic diffusion rate accelerates significantly, and the grains continue to grow by absorbing smaller grains, forming coarse grains. The material exhibits "coarse-grained embrittlement," significantly reducing toughness, and may develop a rough "orange peel" texture on the surface. Manganese powder burns at a temperature of approximately 450°C in air and can burn at 300°C in a pure oxygen environment. The heat released during combustion provides energy for self-propagation. During actual sintering, the preset temperature is set based on the combustion requirements of the specific material.

[0075] Specifically, the preset temperature is 300℃, 350℃, 400℃, 450℃, 500℃, 550℃, 600℃, 650℃, 700℃, 750℃, 800℃, 850℃, 900℃, 950℃, 1000℃, 1050℃, 1100℃, 1150℃, 1200℃, 1250℃ or 1300℃.

[0076] Through the above technical solution, the preset temperature is set within an appropriate range. During the sintering process of manganese material, the lower limit of the temperature ensures that the oxide reduction reaction is fully carried out, and the upper limit of the temperature prevents the metal manganese particles from melting and agglomerating, thereby improving the sintering quality while maintaining the production efficiency of continuous material falling.

[0077] In this embodiment, the air flow rate when ventilating the sintering furnace 11 is a, the mass flow rate when adding materials into the sintering furnace 11 is b, and a≥0.7b.

[0078] In the above text, air flow refers to the volume of gas passing through the sintering furnace per unit time, measured in cubic meters per hour. Mass flow refers to the mass of material introduced into the sintering furnace per unit time, measured in kilograms per hour. By controlling the ratio of these two, the airflow provides the dynamic basis for carrying the material. The air flow is set using the aforementioned air supply device 2.

[0079] Specifically, when the material enters sintering furnace 11 at a mass flow rate b, the airflow constraint of a ≥ 0.7b ensures that the airflow can effectively offset some of the material's free-fall velocity. This proportional relationship prolongs the material's trajectory within sintering furnace 11, allowing it to fully expose itself to the high-temperature region and complete the sintering reaction.

[0080] Through the above technical solution, the flow rate of the rising air flow and the flow rate of the descending material are set within a suitable range, and the material passes through the sintering furnace 11 at an optimal speed, ensuring the sintering quality and sintering efficiency.

[0081] In this embodiment, the velocity of the rising air flow is 1 m / s-2 m / s.

[0082] In the above description, the vertical velocity of the rising airflow is controlled within the range of 1-2 m / s. This velocity range can provide dynamic support for the material, generating sufficient lifting force to maintain material dispersion while preventing excessive blowing that could cause the material to escape the sintering path and become unable to descend.

[0083] Specifically, during the sintering process, when the airflow velocity reaches 1m / s, the material particles avoid falling too quickly due to their own weight and forming accumulations; when the velocity does not exceed 2m / s, the material can still maintain contact time with the high-temperature area during the descent process, ensuring sufficient sintering. Within this flow rate range, the material is constrained in a spiral downward motion trajectory, forming uniform gaps between the particles, which improves the heat transfer efficiency. Specifically, the flow rate of the rising airflow is 1m / s, 1.5m / s, or 2m / s.

[0084] Through the above technical solution, the flow rate of the rising air flow is set within a suitable range, so that the material is evenly heated in a dispersed state, while ensuring the integrity of the sintering path, thereby improving the sintering quality and efficiency.

[0085] In this embodiment, the material to be sintered is manganese material, and the gas is air.

[0086] In the above text, manganese material refers to a powdered compound or alloy material with manganese as the main component. Air provides the necessary oxygen source for the oxidation reaction of the manganese material at high temperature, and at the same time maintains the material in a dispersed state through air blowing.

[0087] Specifically, the manganese material is a mixture of manganese and manganese tetraoxide. The main purpose of the mixture is to prevent violent reactions in the furnace, which can lead to severe deflagration and explosion. The manganese content is 45%-90%.

[0088] Through the above technical solution, the above sintering method is applied to the sintering of manganese materials. On the one hand, air provides downward resistance for the manganese material, and on the other hand, air provides a reaction atmosphere for the manganese material, killing two birds with one stone.

[0089] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A sintering system, characterized in that: include: A sintering device, comprising a sintering furnace and a burner for creating a high-temperature environment inside the sintering furnace, the sintering furnace being provided with a plurality of first air inlets for receiving gas, a feeding port for receiving material to be sintered, a first exhaust port for exhausting gas, and a discharge port for exhausting sintered material, the first air inlets and the discharge port being close to the bottom of the sintering furnace, the plurality of first air inlets being uniformly distributed on the side wall of the sintering furnace along a spiral direction with the vertical axis of the sintering furnace as the central axis, and the feeding port and the first exhaust port being close to the top of the sintering furnace; an air supply device connected to the first air inlet of the sintering furnace and used for supplying gas into the sintering furnace; A feeding device connected to the feeding port of the sintering furnace, used for feeding the material to be sintered into the sintering furnace; A discharge cooling device connected to the discharge port of the sintering furnace for cooling and discharging the sintered material; A material collecting device, connected to the material output end of the discharging cooling device, for collecting the cooled material; The sintering furnace is provided with a plurality of feeding ports, and the plurality of feeding ports are evenly distributed on the side wall of the sintering furnace along a circumferential direction with the vertical axis of the sintering furnace as the central axis; The sintering device includes a plurality of the burners, and the plurality of burners are evenly distributed on the side wall of the sintering furnace along a spiral direction with the vertical axis of the sintering furnace as the central axis.

2. The sintering system according to claim 1, characterized in that: The sintering furnace is also provided with a vent for discharging gas and an explosion-proof vent for relieving pressure. The vent and the explosion-proof vent are both provided on the side wall of the sintering furnace. A filter is connected to the vent, and an explosion-proof valve is connected to the explosion-proof vent.

3. The sintering system according to claim 1, characterized in that: The discharge cooling device includes a discharge pipe and an air cooling device and a water cooling device for forming a low-temperature environment inside the discharge pipe. The discharge pipe includes an air cooling section and a water cooling section connected to each other up and down. The air cooling section is provided with a second air inlet for receiving gas and a second exhaust port for discharging gas. The air cooling device is connected to the second air inlet of the air cooling section for blowing cold air to the air cooling section. The water cooling device is used for performing heat exchange with the water cooling section.

4. The sintering system according to claim 3, characterized in that A discharge guide plate is provided at the bottom of the sintering furnace. The discharge guide plate and the discharge pipe are both inclined. The discharge guide plate is used to guide the sintered material to slide into the discharge pipe by its own weight, and the discharge pipe is used to guide the material to pass in an inclined downward direction by its own weight.

5. The sintering system according to claim 1, characterized in that: It also includes a dust removal device and an exhaust cooling device. The air inlet of the dust removal device is connected to the first exhaust port of the sintering furnace through the exhaust cooling device, and the air outlet of the dust removal device is connected to the first air inlet of the sintering furnace. The exhaust cooling device is used to cool the gas before entering the dust removal device.

6. The sintering system according to claim 5, characterized in that: The second exhaust port of the sintering system is connected to the exhaust cooling device.

7. The sintering system according to claim 5, characterized in that The exhaust cooling device is a jacketed air cooling pipe.

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