A wear-resistant carbide roller production line

Abstract

The present invention relates to the field of cemented carbide roll production and discloses a wear-resistant cemented carbide roll production line, comprising a mixing unit, a grinding unit, a pressing unit, and a firing unit, which are sequentially arranged along a feed direction. The firing unit is characterized in that: the firing unit comprises a heating section, a heat preservation section, and a cooling section, wherein the heat preservation section is located between the heating section and the cooling section; the heat preservation section comprises a heat preservation chamber and a fixing belt, which is arranged and coiled along the central axis of the heat preservation chamber; the heat preservation chamber is provided with an air inlet, which is connected to the heating section via a pipe and is used to extract hot air from the heating section to heat and insulate the heat preservation chamber; the cooling section comprises a cooling chamber, wherein a plurality of spray guns are provided in the cooling chamber, which are used to spray a coolant into the cooling chamber; an air supply pipe is provided at the top of the cooling chamber, one end of the air supply pipe being connected to the cooling chamber and the other end being connected to the heat preservation chamber, and the air supply pipe is used to supply the coolant heated during cooling into the heat preservation chamber. The present invention has the beneficial effects of high energy utilization and low production cost.

Description

Technical Field

[0001] The invention relates to the field of cemented carbide roller production, and in particular to a wear-resistant cemented carbide roller production line. Background Art

[0002] Rollers are the primary working components and tools on a rolling mill that cause continuous plastic deformation of metal. With the continuous development of steel rolling technology and materials, the speed and degree of automation of rolling mills have continued to increase, and the strength of the materials pressed by rolling mills has also been continuously improved, placing higher demands on the quality of the rolls, especially their wear resistance, strength, and toughness. To ensure the strength and wear resistance of the rolls, existing rolls are made of cemented carbide materials through a roll production process, which generally includes steps such as mixing, grinding, pressing, sintering, and polishing.

[0003] To improve production efficiency, existing alloy roll production lines are often automated. For example, Chinese patent publication number CN110369731A discloses an ultrafine cemented carbide production line. The production line comprises a jet mill, a rotary reduction furnace, a four-tube reduction furnace with an automatic pusher, a carbon preparation device, a high-temperature carbonization furnace, a tilting wet mill, a spray dryer, a press, and a sintering furnace. The jet mill is equipped with a classifying wheel. This equipment sequentially grinds, dries, presses, and sinters the raw materials, achieving automated production of cemented carbide.

[0004] Although the above-mentioned cemented carbide roller and production process can realize the automated production of cemented carbide, the prior art still has the following technical problems:

[0005] 1. When grinding the raw materials required for cemented carbide, since the raw materials are usually fine particles and powders, some particles are prone to insufficient grinding when the raw materials are ground in batches, resulting in uneven particle size of the raw materials, affecting the subsequent pressing and sintering effects.

[0006] 2. During the sintering process of cemented carbide, a large amount of energy is usually consumed in the heating and insulation stages to ensure the sintering temperature. However, the heat generated during the sintering process cannot be well collected and utilized, resulting in high energy consumption in the production process of alloy rolls and increased production costs of alloy rolls. Summary of the Invention

[0007] The present invention aims to provide a wear-resistant cemented carbide roll production line to solve the technical problem in the prior art that the energy in the operation process of the device is not reasonably utilized, resulting in high energy consumption in the production process of the alloy roll and increasing the production cost of the alloy roll.

[0008] To achieve the above-mentioned object, the present invention adopts the following technical solution: a wear-resistant carbide roll production line, comprising a mixing unit, a grinding unit, a pressing unit, and a firing unit sequentially arranged along a feeding direction, wherein the firing unit comprises a heating portion, a heat-insulating portion, and a cooling portion, wherein the heat-insulating portion is located between the heating portion and the cooling portion; the heat-insulating portion comprises a heat-insulating cavity and a fixing belt, wherein the fixing belt is coiled and distributed along the central axis of the heat-insulating cavity; an air inlet is provided on the heat-insulating cavity, wherein the air inlet is connected to the heating portion via a pipe, and wherein the air inlet is used to draw hot air from the heating portion to heat and insulate the heat-insulating cavity;

[0009] The cooling part includes a cooling chamber, in which a plurality of spray guns are provided. The spray guns are used to spray cooling material into the cooling chamber. An air pipe is provided on the top of the cooling chamber. One end of the air pipe is connected to the cooling chamber, and the other end is connected to the insulation chamber. The air pipe is used to input the cooling material heated during cooling into the insulation chamber.

[0010] The principle and advantages of this solution are as follows: when producing alloy rolls, the raw materials for producing alloy rolls are mixed, ground, pressed into shape, and sintered in sequence through a mixing unit, a grinding unit, a pressing unit, and a firing unit. When firing the rolls, the rolls are insulated by introducing the hot air in the heating section into the insulation chamber through an air inlet, thereby improving the connectivity between the heating chamber and the insulation chamber, and facilitating the improvement of air circulation in the heating section. This increases the temperature in the heating section and the heating efficiency of the heating section, while preventing the pressure in the heating section from rising due to long-term heating. Furthermore, the hot air in the heating section can enter the insulation chamber along a pipeline, thereby improving resource utilization. The hot air is transported into the insulation chamber through the pipeline to form a directional airflow, thereby preventing the hot air in the heating section from leaking from the edges or gaps of the heating section, which would otherwise waste resources.

[0011] The cooling cavity in the cooling part is connected with the heat preservation cavity, so that after the cooling material in the cooling part is heated in the cooling cavity, the excellent heat preservation performance of the cooling material itself is utilized to make the cemented carbide product raw materials evenly heated during the heat preservation in the heat preservation cavity, thereby improving the heat preservation effect in the heat preservation cavity. In addition, during the cooling process, the cooling material collects the residual heat on the cemented carbide roller, thereby improving the recycling rate of energy.

[0012] Preferably, as an improvement, one end of the air inlet is connected to an air inlet pipe, the air inlet pipe extends into the heat preservation chamber, and the outer surface of the side wall of the air inlet pipe is connected to the fixing band. This allows the hot air to penetrate deep into the heat preservation chamber under the guidance of the air inlet pipe, ensuring uniform distribution of the hot air in the heat preservation chamber.

[0013] Preferably, as an improvement, the fixing belt is located in the area of the air inlet duct and is coiled around the outer surface of the air inlet duct. Multiple fans are provided within the air inlet duct, and the fans are circumferentially connected to the inner wall of the air inlet duct. This allows the fixing belt to drive the air inlet duct and the fans to rotate synchronously during movement, allowing the hot air in the heating unit to move more smoothly into the heat preservation chamber under the action of the fans.

[0014] Preferably, as an improvement, the side wall of the air inlet duct is provided with a plurality of air outlet holes, which are evenly distributed along the circumference of the air inlet duct. This allows the hot air to diffuse at multiple angles and heights under the action of the air outlet holes, thereby improving the uniformity of the hot air distribution in the circumferential and longitudinal directions.

[0015] Preferably, as an improvement, the air delivery pipe is connected to the air inlet near one end of the heat preservation chamber, and a one-way valve is provided in the air delivery pipe to prevent hot air from one end of the air inlet pipe from entering the cooling chamber through the air delivery pipe and affecting the cooling effect of the cooling unit.

[0016] Preferably, as an improvement, the cooling substance is hydrogen, so that the cooling chamber can quickly cool down the rollers after heating and insulation, and can also heat the hydrogen required by the insulation chamber through the cooling chamber.

[0017] Preferably, as an improvement, the grinding unit includes a cylinder and a motor, the cylinder and the motor being connected via gear meshing. A discharge port is provided at one end of the cylinder, and a filter is provided at the end of the discharge port away from the cylinder. The filter is used to screen the raw materials at the discharge port. A feed pipe and a recovery pipe are provided at the end of the filter away from the discharge port. The feed pipe is used to transport raw materials that meet the requirements from the filter, and the recovery pipe is used to recover raw materials that do not meet the requirements after screening. This ensures the uniformity and fineness of the particle size of the raw materials output by the grinding unit, thereby improving the quality of the alloy roll.

[0018] Preferably, as an improvement, a feed port is provided on one side of the discharge port, and one end of the recovery pipe is connected to the feed port. The raw materials that do not meet the requirements after screening are subjected to secondary grinding to improve the utilization rate of the raw materials and avoid the waste of raw materials.

[0019] Preferably, as an improvement, the inner surface of the cylinder is provided with a plurality of grinding grooves, the grinding grooves surrounding the inner surface of the cylinder along the circumference of the cylinder, and the plurality of grinding grooves are evenly distributed along the extension direction of the central axis of the cylinder. This increases the contact area between the grinding balls in the grinding chamber and improves the grinding efficiency of the grinding unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the production line in an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the grinding unit structure in an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the heat preservation part in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The figure marks in the drawings of the specification include: mixing unit 1, grinding unit 2, cylinder 201, main gear 202, motor 203, slave gear 204, grinding ball 205, pressing unit 3, firing unit 4, heating part 401, heating chamber 402, conveyor belt 403, insulation part 404, cooling part 405, cooling chamber 406, discharge pipe 5, feed pipe 501, spiral blade 502, spray gun 503, hopper 504, grinding trough 505, screener 6, feed pipe 601, recovery pipe 602, insulation chamber 7, fixing belt 701, air inlet pipe 8, fan blade 801, insulation pipe 9, air pipe 10, and one-way valve 11.

[0025] like Figure 1 As shown, a wear-resistant cemented carbide roller production line includes a mixing unit 1, a grinding unit 2, a pressing unit 3 and a firing unit 4 distributed in sequence along the feeding direction; when the alloy roller is produced, the raw materials for producing the alloy roller are mixed, ground, pressed into shape and sintered through the mixing unit 1, the grinding unit 2, the pressing unit 3 and the firing unit 4 in sequence.

[0026] like Figure 2As shown, the grinding unit 2 includes a barrel 201 and a motor 203. One end of the barrel 201 is fixedly connected to a main gear 202 via bolts. The output shaft of the motor 203 is connected to a slave gear 204 via a reducer. The slave gear 204 is located to one side of the main gear 202 and meshes with the main gear 202. A discharge pipe 5 is provided at one end of the barrel 201 and communicates with one end of the barrel 201. Specifically, the discharge pipe 5 and the barrel 201 are fixedly connected via bolts. In this embodiment, the central axis of the discharge pipe 5 is aligned with the central axis of the barrel 201, and one end of the discharge pipe 5 extends away from the barrel 201. A feed port is provided on one side of the discharge pipe 5. A feed pipe 501 is bolted or welded to the feed port, communicating with the sidewall of the discharge pipe 5. A baffle is rotatably connected to one end of the feed pipe 501 near the discharge pipe 5. The baffle controls the opening and closing of the opening between the feed pipe 501 and the discharge pipe 5. A spiral blade 502 is provided in the discharge pipe 5. The spiral blade 502 extends along the central axis of the discharge pipe 5. In this embodiment, the spiral blade 502 is driven by the motor 203 and can rotate clockwise and counterclockwise under the drive of the motor 203, thereby feeding and discharging the cylinder 201.

[0027] A spray gun 503 is rotatably connected to the end of the barrel 201 away from the discharge pipe 5. The central axis of the spray gun 503 is collinear with the central axis of the barrel 201. One end of the spray gun 503 extends into the interior of the barrel 201. The spray gun 503 is provided with multiple spray holes in the area within the barrel 201, evenly distributed along the extension direction of the central axis of the spray gun 503. A hopper 504 is located at the end of the spray gun 503 away from the barrel 201, and a valve is installed at the bottom of the feed hopper 504 to control the flow of liquid into the spray gun 503. This ensures that when adding raw materials to the grinding process, the raw materials are mixed evenly with the added materials, improving the mixing effect of the materials during the grinding process.

[0028] A plurality of grinding grooves 505 are formed on the inner sidewall of the cylinder 201. The grinding grooves 505 surround the inner surface of the cylinder 201 and are evenly spaced along the central axis of the cylinder 201. The width of the grinding grooves 505 is greater than the diameter of the grinding balls 205 within the cylinder 201. This ensures full contact between the grinding balls 205 and the inner wall of the cylinder 201 during grinding, increasing the grinding area within the cylinder 201 and improving the efficiency of grinding the raw material.

[0029] A filter 6 is rotatably connected to the end of the discharge pipe 5 away from the cylinder 201. The feed port of the filter 6 is connected to the opening of the end of the discharge pipe 5 away from the cylinder 201. The end of the filter 6 away from the discharge pipe 5 is connected to a recovery pipe 602 and a feed pipe 601. One end of the recovery pipe 602 and the feed pipe 601 are both connected to the two sides of the filter 6. The other end of the recovery pipe 602 is connected to the feed pipe 501, and the other end of the feed pipe 601 is connected to the pressing unit 3. Preferably, in this embodiment, the filter 6 can be used to screen the ground material through a screen, and the powder can be extracted and transported by a pump at the end of the recovery pipe 602 and the feed pipe 601 near the filter 6. Preferably, in this embodiment, the ground material can be extracted and transported by a powder pneumatic diaphragm pump. The recovery pipe 602 is used to recover the material that does not meet the particle size requirements screened out by the filter 6, and the feed pipe 601 is used to transport the qualified material screened out by the filter 6 to the pressing unit 3 for compression molding. Avoid recycling some raw materials that are not fully ground during grinding for secondary grinding, ensure the fineness and uniformity of the raw materials in the next step of pressing, improve the utilization rate of raw materials, and reduce losses and waste in the production process.

[0030] The firing unit 4 includes a heating section 401, a heat-insulating section 404, and a cooling section 405. The heating section 401 and the cooling section 405 are located on either side of the heat-insulating section 404. The heating section 401 includes a heating chamber 402 and a conveyor belt. The heating chamber 402 is a rectangular space. Multiple heating tubes are installed in the heating chamber 402 to heat the environment and the feed material within the heating chamber 402. In this embodiment, the heating chamber 402 is surrounded by heat-insulating material to ensure a stable temperature inside the heating chamber 402. The conveyor belt 403 extends through the heating chamber 402 along its extension direction. The rollers pass through the heating chamber 402 via the conveyor belt 403 and are heated to a preset temperature after passing through the heating chamber 402.

[0031] like Figure 3 As shown, the insulation part 404 includes an insulation chamber 7 and a fixing belt 701, and the fixing belt 701 is located in the insulation chamber 7; the insulation chamber 7 is a cylindrical cavity, and the center axis position of the top of the insulation chamber 7 is connected to the transmission belt 403 in the heating part 401. Specifically, an opening is provided at the top of the insulation chamber 7, and a fixing belt 701 is connected through the opening, wherein one end of the fixing belt 701 extends to the side away from the insulation chamber 7 to the bottom of the transmission belt 403, and the other end extends to the inside of the insulation chamber 7; a plurality of through grooves are provided on the fixing belt 701, and the plurality of through grooves are evenly arranged along the extension direction of the fixing belt 701, and the size of the through grooves matches the diameter of the roller, and the through grooves and the edges of the fixing belt 701 extend toward the center axis side of the fixing belt 701 at an angle, and the through grooves are used to fix the roller.

[0032] One end of the fixed belt 701, located within the insulation chamber 7, is coiled along the central axis of the insulation chamber 7. Specifically, the fixed belt 701 is parallel to the side surface of the insulation chamber 7 within the insulation chamber 7 and coils along the central axis of the heating chamber 402 toward the edge of the heating chamber 402. A section of the fixed belt 701, near the edge of the heating chamber 402, extends outward through the side wall of the fixed belt 701. The roller is embedded in the through-slot of the fixed belt 701 and, driven by the fixed belt 701, coils and moves along the central axis of the insulation chamber 7. During this movement, the insulation step of the firing process is completed. Furthermore, during the insulation process, the conveyor belt 403 and the fixed belt 701 can be continuously moved, achieving assembly line operation of the heating and insulation processes and improving the firing efficiency of the firing unit 4.

[0033] A mounting bracket is provided within the insulation chamber 7 and is fixedly connected to the insulation chamber 7 via bolts. The mounting bracket extends in the same direction as the fixing belt 701. The fixing belt 701 is sleeved onto the mounting bracket and can move circumferentially along the surface of the mounting bracket. This ensures that the rollers are securely connected to the fixing belt 701 within the insulation chamber 7, enabling orderly arrangement and movement of the rollers within the insulation chamber 7, thereby ensuring the orderly operation of the insulation chamber 7.

[0034] An air inlet is also provided at the central axis of the insulation chamber 7. The central axis of the air inlet is collinear with the central axis of the insulation chamber 7. An air inlet pipe 8 is provided within the insulation chamber 7 at a position corresponding to the air inlet. The ends of the air inlet pipe 8 are rotatably connected between the inner surface of the insulation chamber 7 and the air inlet. A fixing band 701, located at the central axis of the insulation chamber 7, is coiled and distributed along the extension direction of the central axis of the air inlet pipe 8. Specifically, the fixing band 701 extends downwardly from the outer surface of the air inlet pipe 8. One side of the fixing band 701 has a protrusion, one end of which is fixedly connected to the fixing band 701, and the other end extends away from the end of the fixing band 701. Multiple grooves are provided at the contact points between the outer surface of the air inlet pipe 8 and the fixing band 701. The grooves and the protrusions engage with each other, so that the air inlet pipe 8 rotates along its own axis during the movement of the fixing band 701 through the interaction between the protrusions and the grooves. This reduces the number of structures in the insulation chamber 7 that drive the air inlet pipe 8 to rotate, simplifying the overall structure of the insulation chamber 7.

[0035] A fan blade 801 is fixedly connected to the inside of the air inlet pipe 8. The edge of the fan blade 801 is fixedly connected to the inner surface of the side wall of the air inlet pipe 8 by bolts or welding. The central axis of the fan blade 801 is on the same straight line as the central axis of the air inlet pipe 8. When the air inlet pipe 8 rotates under the drive of the fixing belt 701, the fan blade 801 is driven to rotate. There are multiple fan blades 801 fixedly connected to the air inlet pipe 8. The multiple fan blades 801 are evenly distributed along the central axis of the air inlet pipe 8. Preferably, in this embodiment, two groups of fan blades 801 are provided inside the air inlet pipe 8. This allows the air inlet pipe 8 to have sufficient suction force to draw the hot air in the heating chamber 402 into the insulation chamber 7, while increasing the strength of the wind formed by the fan into the insulation chamber 7, improving the thrust of the hot air entering the insulation chamber 7, increasing the diffusion area of the hot air, and ensuring the uniformity of the temperature distribution in the insulation chamber 7.

[0036] The side of the air inlet, away from the heat-insulating chamber 7, is connected to the top of the heating chamber 402 via a heat-insulating pipe 9. Multiple air outlet holes are also provided on the side of the air inlet pipe 8, evenly distributed around the circumference of the air inlet pipe 8. The fan within the air inlet pipe 8 generates an airflow as it rotates, drawing the hot air from the heating chamber 402 into the air inlet pipe 8 through the heat-insulating pipe 9. The air then flows into the heat-insulating chamber 7 through the air outlet holes on the surface of the air inlet pipe 8. As the hot air flows into the heat-insulating chamber 7, it is propelled by the fan to rapidly diffuse within the heat-insulating chamber 7, thereby improving the uniformity of the hot air distribution within the heat-insulating chamber 7.

[0037] The cooling portion 405 includes a cooling chamber 406, which is a rectangular structure. A conveyor belt 403 is connected along the extension direction of the cooling chamber 406. One end of the conveyor belt 403 is located below the fixing belt 701 on the side of the insulation chamber 7. Specifically, the extension direction of the fixing belt 701 away from the insulation chamber 7 gradually tilts until it is parallel to the horizontal plane. Multiple spray guns 503 are fixedly connected in the cooling chamber 406. Specifically, the spray guns 503 are evenly distributed at the bottom of the cooling chamber 406. One end of the spray gun 503 is connected to the cooling pipe, and the other end extends into the cooling chamber 406. The spray gun 503 is used to spray the cooling material in the cooling pipe into the cooling chamber 406. Preferably, in this embodiment, the cooling material is hydrogen. In other embodiments, the cooling material can also be other gases or cooling media.

[0038] An air pipe 10 is connected to the top of the cooling chamber 406. One end of the air pipe 10 is connected to the top of the cooling chamber 406, and the other end is connected to the end of the insulation pipe 9 near the air inlet. A sealing cover is provided between the cooling chamber 406 and the air pipe 10. The sealing cover can be driven by the motor 203 to achieve the connection and closing between the cooling chamber 406 and the air pipe 10. A one-way valve 11 is also installed in the air pipe 10 by bolts. The one-way valve 11 can control the one-way flow of air in the air pipe 10 from the cooling chamber 406 to the insulation chamber 7. When cooling the rollers in the cooling chamber 406, hydrogen can be used to quickly cool the rollers, thereby quenching the rollers. The hydrogen is then heated and transported to the air inlet through the air pipe 10. After being mixed and heated with the hot air transported from the heating chamber 402, the heated hydrogen enters the heat preservation chamber 7 through the air inlet pipe. This allows the hydrogen entering the heat preservation chamber 7 to be heated by the dual effects of the hot air in the cooling chamber 406 and the heat preservation pipe 9, thus preventing the hydrogen temperature entering the heat preservation chamber 7 from being too low, which would cause uneven heating of the rollers during the heat preservation process and reduce the heat treatment effect of the rollers. The hydrogen heated after cooling in the cooling chamber 406 is then transported to the heat preservation chamber 7 for secondary use, thereby improving the recycling of resources during the processing process.

[0039] The specific implementation process is as follows:

[0040] The mixing unit 1 is used to mix the raw materials for preparing alloy rolling mill rolls according to a proportion, and the mixed raw materials are transported to the grinding unit 2 through a pipeline for grinding. The raw materials are placed in the grinding unit 2 where grinding balls 205 are placed, and the raw materials are ground. During the grinding process, a forming agent and a grinding medium are sprayed into the raw materials through a spray gun 503 for mixing and grinding. When the grinding unit 2 grinds the raw materials to a preset particle size, the ground raw materials are filtered and classified. The raw materials that meet the preset particle size are transported to the pressing unit 3 through the feed pipe 601, and the ground raw materials are pressed and formed. The raw materials that do not meet the particle size requirements are recovered through the recovery pipe 602 for secondary grinding. After the pressing unit 3 presses the raw material into a billet, the billet is conveyed to the heating unit, wherein the billet is heated to 1410°C~1420°C in the heating chamber 402, and then the billet is conveyed to the insulation chamber 7 for insulation under the action of the conveyor belt 403 and the fixed belt 701. Specifically, the billet falls onto the fixed belt 701 at one end of the conveyor belt 403, and the billet is engaged in the through groove of the fixed belt 701. The fixed belt 701 drives the billet to move. After hydrogen is introduced into the insulation chamber 7 to keep the billet warm for 3-5 hours, the billet is conveyed to the cooling chamber 406 under the action of the fixed belt 701 and cooled in the cooling chamber 406 to complete the heat treatment process of the billet.

[0041] In the present invention, when grinding the raw materials, a grinding groove 505 is opened in the cylinder 201 to increase the contact area between the grinding balls 205 and the inner wall of the cylinder 201, thereby improving the grinding efficiency of the grinding balls 205. A filter 6 and a recovery pipe 602 are set in the grinding member to filter and recover the raw materials that do not meet the particle size requirements during the grinding process, thereby ensuring the fineness of the raw materials entering the next link, improving the quality of the blanks pressed by the pressing unit 3, and recovering the raw materials that do not meet the particle size requirements for secondary grinding, thereby reducing the waste of raw materials, improving the utilization rate of raw materials, and reducing the production cost of the rollers.

[0042] In the firing unit 4, the hot air in the heating chamber 402 is introduced into the heat-insulating chamber 7 to heat the heat-insulating chamber 7, thereby improving the utilization rate of the hot air in the heating chamber 402. Furthermore, the fan in the air inlet pipe is driven by the movable fixed belt 701, so that when the hot air in the heating chamber 402 is introduced, the fan speed can be controlled according to the moving speed of the fixed belt 701 in the heat-insulating chamber 7, thereby ensuring that the hot air extraction speed matches the actual situation in the heat-insulating chamber 7. At the same time, the heat-insulating temperature in the heat-insulating chamber 7 is generally related to the heating temperature in the heating chamber 402. Therefore, by introducing the hot air in the heating chamber 402 for heat-insulating, the heat-insulating temperature in the heat-insulating chamber 7 can be synchronously adjusted according to the heating temperature in the heating chamber 402.

[0043] Furthermore, during the insulation process, hydrogen from cooling chamber 406 is introduced into insulation chamber 7. This allows the properties of hydrogen to evenly heat the raw material of the cemented carbide roll within insulation chamber 7, preventing cracks and delamination after the product is formed. The roll is then insulated within insulation chamber 7 for 3-5 hours, increasing the heating time of the raw material. Finally, the temperature is lowered, transforming the internal structure of the cobalt in the raw material from a face-centered hexagonal structure to a close-packed hexagonal structure. This improves the strength of the alloy roll while maintaining its hardness. Furthermore, the internal porosity of the cemented carbide is reduced, enhancing its red hardness. Furthermore, during the processing process, hydrogen is sequentially filled into cooling chamber 406 and insulation chamber 7, respectively, to cool and insulate the alloy roll, fully utilizing the energy during the alloy roll processing and reducing energy loss.

[0044] The above are only embodiments of the present invention, and common knowledge such as the specific technical solutions and / or characteristics in the solutions are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A wear-resistant carbide roll production line, comprising a mixing unit, a grinding unit, a pressing unit, and a firing unit arranged in sequence along a feeding direction, characterized in that: The firing unit includes a heating part, a heat preservation part and a cooling part, wherein the heat preservation part is located between the heating part and the cooling part; the heat preservation part includes a heat preservation cavity and a fixing belt, wherein the fixing belt is coiled and distributed along the central axis of the heat preservation cavity; an air inlet is provided on the heat preservation cavity, and the air inlet is connected to the heating part through a pipe, and the air inlet is used to extract hot air from the heating part to heat and keep the heat preservation cavity; The cooling unit includes a cooling chamber, wherein a plurality of spray guns are provided in the cooling chamber, and the spray guns are used to spray a cooling substance into the cooling chamber. An air pipe is provided at the top of the cooling chamber, and one end of the air pipe is connected to the cooling chamber, and the other end is connected to the heat preservation chamber. The air pipe is used to input the cooling substance heated during cooling into the heat preservation chamber. One end of the air inlet is connected to the air inlet pipe, the air inlet pipe extends into the insulation chamber, and the outer surface of the side wall of the air inlet pipe is connected to the fixing belt; the fixing belt is located in the area of the air inlet pipe and is coiled around the outer surface of the air inlet pipe; a plurality of fans are provided inside the air inlet pipe, and the circumference of the fans is connected to the inner wall of the air inlet pipe; a plurality of air outlet holes are opened on the side wall of the air inlet pipe, and the air outlet holes are evenly distributed along the circumference of the air inlet pipe.

2. The wear-resistant carbide roll production line according to claim 1, characterized in that: The air delivery pipe is connected to the air inlet at one end close to the heat preservation chamber, and a one-way valve is provided in the air delivery pipe.

3. The wear-resistant carbide roll production line according to claim 1, characterized in that: The cooling substance is hydrogen.

4. The wear-resistant carbide roll production line according to claim 1, characterized in that: The grinding unit includes a cylinder and a motor, and the cylinder and the motor are connected by gear meshing. A discharge port is provided at one end of the cylinder, and a filter is provided at the end of the discharge port away from the cylinder. The filter is used to filter the raw materials at the discharge port. A feed pipe and a recovery pipe are provided at the end of the filter away from the discharge port. The feed pipe is used to transport the raw materials that meet the requirements in the filter, and the recovery pipe is used to recover the raw materials that do not meet the screening requirements.

5. The wear-resistant carbide roll production line according to claim 4, characterized in that: A feed port is provided on one side of the discharge port, and one end of the recovery pipe is connected to the feed port.

6. The wear-resistant carbide roll production line according to claim 4, characterized in that: A plurality of grinding grooves are provided on the inner surface of the cylinder. The grinding grooves surround the inner surface of the cylinder along the circumference of the cylinder, and the plurality of grinding grooves are evenly distributed along the extension direction of the central axis of the cylinder.

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