Feeding device and manufacturing method of a recycled copper smelting furnace

Abstract

The present invention discloses a feeding device for a recycled copper smelting furnace and a manufacturing method thereof. The outer surface of the feeding device is coated with a layer of high-temperature resistant material, and the inner surface is coated with a layer of wear-resistant and high-temperature resistant material. The high-temperature resistant material is formed by mixing a high-temperature coating substrate and sodium silicate nonahydrate in a mass ratio of 1:(2-4); the wear-resistant and high-temperature resistant material is formed by mixing a high-temperature coating substrate, sodium silicate nonahydrate and coarse silicon carbide particles, wherein the mass ratio of the high-temperature coating substrate to sodium silicate is 1:(2-4), and the addition amount of the coarse silicon carbide particles is 10%-50% of the mass of the high-temperature coating substrate. The high-temperature coating substrate is formed by mixing silicon dioxide, silicon carbide, alumina and chromium sesquioxide in a mass ratio of (1-4):(0.8-1.2):(0.8-1.2):(0.2-0.4). The feeding device of the present invention has high-temperature resistance, is not easily deformed, and can improve the service life of the device at the same time. It is easy to use and is convenient and fast to dock with the furnace door.

Description

Technical Field

[0001] The present invention relates to a feeding device for a recycled copper smelting furnace and a manufacturing method thereof. Background Art

[0002] Currently, the feeding of recycled copper smelting furnaces mainly uses bulk materials into the furnace. When feeding materials into the furnace, it is necessary to align the feeding port of the feeding device with the furnace door opening and then push the recycled copper bulk materials into the furnace. The entire feeding process generally takes 5 - 8 hours. This makes the feeding port of the feeding device stay in the high-temperature furnace for a long time, and the furnace temperature can reach over 1000°C. Prolonged burning causes the feeding device to be prone to deformation during service, thus affecting its service performance. There is an idea to thicken the steel plate of the feeding device, but in actual use, the feeding device becomes bulky, which brings inconvenience when the feeding device is docked with the furnace door opening and even easily damages the furnace door opening. Therefore, it is rarely adopted. Summary of the Invention

[0003] Aiming at the above problems existing in the prior art, the present invention provides a feeding device for a recycled copper smelting furnace and a manufacturing method thereof, which have good high-temperature resistance, are not easily deformed, are light, wear-resistant, and have a long service life.

[0004] The feeding device of the recycled copper smelting furnace of the present invention is characterized in that a layer of high-temperature resistant material is coated on the outer surface of the feeding device, and a layer of wear-resistant and high-temperature resistant material is coated on the inner surface.

[0005] The high-temperature resistant material is composed of a high-temperature coating substrate and sodium silicate nonahydrate binder mixed in a mass ratio of 1:(2 - 4). The high-temperature coating substrate is composed of four anhydrous powder substances, namely silicon dioxide, silicon carbide, alumina, and chromium sesquioxide, and is proportioned according to the mass ratio of silicon dioxide:silicon carbide:alumina:chromium sesquioxide = (1 - 4):(0.8 - 1.2):(0.8 - 1.2):(0.2 - 0.4).

[0006] The wear-resistant and high-temperature resistant material is composed of a high-temperature coating substrate and sodium silicate nonahydrate binder mixed in a mass ratio of 1:(2 - 4), and at the same time, coarse silicon carbide particles are added for mixing. The addition amount of the coarse silicon carbide particles is 10% - 50% of the mass of the high-temperature coating substrate, and the particle size of the coarse silicon carbide particles is 10 - 20 μm. The high-temperature coating substrate is composed of four anhydrous powder substances, namely silicon dioxide, silicon carbide, alumina, and chromium sesquioxide, and is proportioned according to the mass ratio of silicon dioxide:silicon carbide:alumina:chromium sesquioxide = (1 - 4):(0.8 - 1.2):(0.8 - 1.2):(0.2 - 0.4).

[0007] The preparation method of the high-temperature resistant material for the feeding device of the recycled copper smelting furnace of the present invention includes the following steps:

[0008] (1) Prepare a high-temperature coating substrate, and mix silica: silicon carbide: alumina: chromium sesquioxide according to a mass ratio of (1-4):(0.8-1.2):(0.8-1.2):(0.2-0.4). All four substances are anhydrous powders;

[0009] (2) Place the anhydrous powders weighed in step (1) in a ball mill for grinding. Zirconia balls are selected as the grinding balls, the particle size of the grinding balls is 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 150-200 revolutions per minute, the time is 4-12 hours, the average particle size of the powder is 2-5 μm, and a small amount of anhydrous ethanol is added for mixing;

[0010] (3) Place the ball-milled powder in a drying oven for drying, the temperature is 50-80 °C, and the time is 6-10 hours;

[0011] (4) Mix the powder prepared in step (3) and sodium silicate nonahydrate according to a mass ratio of 1:(2-4), and stir with a magnetic stirrer for 2-4 h to make it evenly mixed. Thus, the preparation of the high-temperature resistant coating material is completed.

[0012] The method for preparing the high-temperature and wear-resistant material for the feeding device of the regenerative copper smelting furnace of the present invention includes the following steps:

[0013] (1) Prepare a high-temperature coating substrate, and mix silica: silicon carbide: alumina: chromium sesquioxide = (1-4):(0.8-1.2):(0.8-1.2):(0.2-0.4) according to a mass ratio. All four substances are anhydrous powders;

[0014] (2) Place the anhydrous powders weighed in step (1) in a ball mill for grinding. Zirconia balls are selected as the grinding balls, the particle size of the grinding balls is 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 150-200 revolutions per minute, the time is 4-12 hours, the average particle size of the powder is 2-5 μm, and a small amount of anhydrous ethanol can be added for mixing;

[0015] (3) Place the ball-milled powder in a drying oven for drying, the temperature is 50-80 °C, and the time is 6-10 hours;

[0016] (4) Mix the powder prepared in step (3) and sodium silicate nonahydrate according to a mass ratio of 1:(2-4), and simultaneously add coarse silicon carbide particles with a mass of 10%-50% of the powder mass and a particle size of 10-20 μm, and stir with a magnetic stirrer for 2-4 h to make it evenly mixed. Thus, the preparation of the high-temperature and wear-resistant coating material is completed.

[0017] The manufacturing method of the feeding device of the regenerative copper smelting furnace of the present invention includes the following steps:

[0018] (1) Remove rust and burrs on the surface of the steel with a grinding machine, perform degreasing and derusting treatment, and dry it;

[0019] (2) Polish with water sandpaper according to the cross-cross method to form regular patterns on the surface of the base material;

[0020] (3) Evenly apply high-temperature resistant materials and high-temperature resistant and wear-resistant materials on the front and back sides of the steel respectively, and cure them in a drying oven at 30 - 50 °C for 24 - 48 hours to make the coating fully adhere to the steel;

[0021] (4) Preheat the steel with coating obtained in step (3) in advance, and then sinter it. The sintering process is mainly divided into four stages: a. The temperature is 80 - 95 °C and the time is 4 - 8 hours, and the moisture in the coating is completely evaporated; b. Heat up to 450 - 500 °C at a rate of 2 - 4 °C / min and keep it warm for 4 - 8 hours to make the crystal water in the coating lose; c. Heat up to 880 - 920 °C at a rate of 2 - 4 °C / min and keep it warm for 2 - 4 hours; d. Heat up to 1200 - 1300 °C at a rate of 2 - 4 °C / min, and the holding time is 0.5 - 1 hour;

[0022] (5) Cut the steel with coating obtained in step (4), and manufacture the feeding device by welding, where the outer surface is coated with a high-temperature resistant coating and the inner surface is coated with a high-temperature resistant and wear-resistant coating.

[0023] Due to the outer surface of the feeding device of the regenerative copper melting furnace of the present invention being coated with a high-temperature resistant layer and the inner surface being coated with a wear-resistant and high-temperature resistant layer, the feeding device can be butted with the furnace door opening with the same weight or even a moderately reduced weight, has the ability to resist high temperatures, is not easily deformed, and at the same time improves the service life of the feeding device. It is easy to use and convenient to butt with the furnace door opening. Brief Description of the Drawings

[0024] Figure 1 is a schematic diagram of the feeding device of the regenerative copper melting furnace of the present invention.

[0025] Figure 2 is a surface topography diagram of the high-temperature resistant layer sample in Example 1. Detailed Embodiments

[0026] From Figure 1 it can be seen the structure of the feeding device of the regenerative copper melting furnace of the present invention. This device is welded by a steel plate with a coating. In the figure, the feeding port 1 of the feeding device is butted with the furnace door opening. The outer surface 2 of the feeding device is coated with a layer of high-temperature resistant material, and the inner surface 3 is coated with a layer of wear-resistant and high-temperature resistant material.

[0027] When manufacturing the feeding device of the present invention, it is necessary to first process a steel plate with a high-temperature resistant material coated on one side and a wear-resistant and high-temperature resistant material coated on the other side. The specific implementation steps are as follows:

[0028] 1. Prepare a high-temperature resistant material for standby.

[0029] The preparation of the high-temperature resistant material includes the following steps:

[0030] (1) Prepare a high-temperature coating substrate, and mix according to the mass ratio of silicon dioxide: silicon carbide: aluminum oxide: chromium sesquioxide of (1 - 4):(0.8 - 1.2):(0.8 - 1.2):(0.2 - 0.4). These four substances are all anhydrous powders.

[0031] (2) Place the anhydrous powders weighed in step (1) in a ball mill for grinding. The grinding balls are zirconia balls with a particle size of 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 150 - 200 revolutions per minute, the time is 4 - 12 hours, the average particle size of the powder is 2 - 5 μm, and a small amount of anhydrous ethanol is added for mixing.

[0032] (3) Place the ball-milled powder in a drying oven for drying, the temperature is 50 - 80 °C, and the time is 6 - 10 hours.

[0033] (4) Mix the powder prepared in step (3) and sodium silicate nonahydrate according to the mass ratio of 1:(2 - 4), and stir with a magnetic stirrer for 2 - 4 h to make it evenly mixed. Thus, the preparation of the high-temperature resistant coating material is completed.

[0034] 2. Prepare a wear-resistant and high-temperature resistant material for standby.

[0035] The preparation of the wear-resistant and high-temperature resistant material includes the following steps:

[0036] (1) Prepare a high-temperature coating substrate, and mix according to the mass ratio of silicon dioxide: silicon carbide: aluminum oxide: chromium sesquioxide = (1 - 4):(0.8 - 1.2):(0.8 - 1.2):(0.2 - 0.4). These four substances are all anhydrous powders.

[0037] (2) Place the anhydrous powders weighed in step (1) in a ball mill for grinding. The grinding balls are zirconia balls with a particle size of 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 150 - 200 revolutions per minute, the time is 4 - 12 hours, the average particle size of the powder is 2 - 5 μm, and a small amount of anhydrous ethanol is added for mixing.

[0038] (3) Place the ball-milled powder in a drying oven for drying, the temperature is 50 - 80 °C, and the time is 6 - 10 hours.

[0039] (4) The powder prepared in step (3) and sodium silicate nonahydrate are mixed in a mass ratio of 1:(2-4), and coarse silicon carbide particles with a mass of 10%-50% of the mass of the powder and a particle size of 10-20 μm are added at the same time, and stirred with a magnetic stirrer for 2-4 hours to make the mixture uniform, thereby completing the preparation of the wear-resistant and high-temperature resistant coating material.

[0040] 3. Produce a steel plate coated with a high temperature resistant material on one side and a wear resistant and high temperature resistant material on the other side. The steel plate manufacturing includes the following steps:

[0041] (1) Use a grinder to remove rust and burrs on the steel surface, degrease and rust, and dry;

[0042] (2) Use water-abrasive sandpaper to polish in a cross-cross method to form regular patterns on the surface of the substrate;

[0043] (3) Apply the high temperature resistant material and the high temperature wear resistant material evenly on the front and back sides of the steel, and cure them in a drying oven at 30-50°C for 24-48 hours to make the coating completely fit the steel;

[0044] (4) Preheat the coated steel obtained in step (3) and then sinter it. The sintering process is mainly divided into four stages: a. The temperature is 80-95°C and the time is 4-8 hours. The water in the coating is completely evaporated; b. The temperature is increased to 450-500°C at a rate of 2-4°C / min and kept warm for 4-8 hours, so that the crystal water in the coating is lost; c. The temperature is increased to 880-920°C at a rate of 2-4°C / min and kept warm for 2-4 hours; d. The temperature is increased to 1200-1300°C at a rate of 2-4°C / min and kept warm for 0.5-1 hour; thus, the production of a steel plate coated with a high-temperature resistant material on one side and a wear-resistant and high-temperature resistant material on the other side is completed. It is worth noting that the sintering process should strictly follow the temperature and time of the four stages to ensure a firm bond between the coating and the steel plate.

[0045] 4. Processing of feeding device

[0046] First, a steel plate coated with a high temperature resistant material on one side and a wear resistant and high temperature resistant material on the other side is obtained by the above method, and then a feeding device is manufactured using the steel plate. The shape of the feeding device is as follows: Figure 1 As shown, the same structure as the prior art can be adopted. The steel plate is cut according to the drawing, the side coated with high temperature resistant material is used as the outer surface, the side coated with high temperature wear resistant material is used as the inner surface, and then welding is performed until the processing of the feeding device is completed.

[0047] The present invention will be further described below in conjunction with the embodiments.

[0048] Implementation Case 1

[0049] 1. Prepare a high-temperature resistant material for standby.

[0050] The preparation of the high-temperature resistant material includes the following steps: (1) Prepare a high-temperature coating substrate, and mix according to the mass ratio of silicon dioxide: silicon carbide: aluminum oxide: chromium sesquioxide = 3:1:1:0.3. These four substances are all anhydrous powders; (2) Place the anhydrous powders weighed in step (1) in a ball mill for grinding. The grinding balls are zirconia balls with a particle size of 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 180 revolutions per minute, the time is 8 hours, the average particle size of the powder is 3.5 μm, and a small amount of anhydrous ethanol is added for mixing; (3) Place the ball-milled powder in a drying oven for drying at a temperature of 60 °C for 8 hours; (4) Mix the powder prepared in step (3) and sodium silicate nonahydrate according to a mass ratio of 1:3, and stir with a magnetic stirrer for 4 h to make it evenly mixed. Thus, the preparation of the high-temperature resistant coating material is completed.

[0051] 2. Prepare a wear-resistant and high-temperature resistant material for standby.

[0052] The preparation of the wear-resistant and high-temperature resistant material includes the following steps: (1) Prepare a high-temperature coating substrate, and mix according to the mass ratio of silicon dioxide: silicon carbide: aluminum oxide: chromium sesquioxide = 3:1:1:0.3. These four substances are all anhydrous powders; (2) Place the anhydrous powders weighed in step (1) in a ball mill for grinding. The grinding balls are zirconia balls with a particle size of 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 180 revolutions per minute, the time is 8 hours, the average particle size of the powder is 3.5 μm, and a small amount of anhydrous ethanol is added for mixing; (3) Place the ball-milled powder in a drying oven for drying at a temperature of 60 °C for 8 hours; (4) Mix the powder prepared in step (3) and sodium silicate nonahydrate according to a mass ratio of 1:3, and at the same time add coarse silicon carbide particles with a mass of 30% of the powder mass and a particle size of 15 μm, and stir with a magnetic stirrer for 4 h to make it evenly mixed. Thus, the preparation of the wear-resistant and high-temperature resistant coating material is completed.

[0053] 3. Produce a steel plate with a high-temperature resistant material coated on one side and a wear-resistant and high-temperature resistant material coated on the other side.

[0054] The manufacture of the steel plate includes the following steps:

[0055] (1) Use a grinding machine to remove rust and burrs on the surface of the steel, perform degreasing and derusting treatment, and dry.

[0056] (2) Polish using water sandpaper according to the cross-cross method so that regular patterns are formed on the surface of the substrate.

[0057] (3) Apply the high-temperature resistant material and the high-temperature and wear-resistant material evenly on the front and back sides of the steel respectively, and cure them in a drying oven at 40°C for 36 hours to make the coating fully adhere to the steel.

[0058] (4) Preheat the steel sheet with coating obtained in step (3) in advance, and then carry out sintering. The sintering process is mainly divided into four stages: a. The temperature is 90°C and the time is 8 hours, and the moisture in the coating is completely evaporated; b. Heat up to 500°C at a rate of 3°C / min and keep it warm for 6 hours to make the crystal water in the coating lose; c. Heat up to 900°C at a rate of 3°C / min and keep it warm for 4 hours; d. Heat up to 1250°C at a rate of 3°C / min and the holding time is 0.5 hours; thus, the production of the steel sheet with high-temperature resistant material coated on one side and wear-resistant and high-temperature resistant material coated on the other side is completed. It should be noted that the sintering process should strictly follow the temperature and time of the four stages to ensure the firm combination of the coating and the steel sheet.

[0059] IV. Processing of the feeding device

[0060] First, use the steel sheet with high-temperature resistant material coated on one side and wear-resistant and high-temperature resistant material coated on the other side obtained by the above method, and then use this steel sheet to manufacture the feeding device. The shape of the feeding device is as Figure 1 shown, and the same structure as the prior art can be adopted. Cut the steel sheet according to the drawing, use the side coated with high-temperature resistant material as the outer surface and the side coated with wear-resistant and high-temperature resistant material as the inner surface, and then carry out welding until the processing of the feeding device is completed.

[0061] Example 2

[0062] Compared with Example 1, silicon dioxide: silicon carbide: aluminum oxide: chromium sesquioxide = 3: 0.9: 0.9: 0.4, the particle size of powder ball milling is 3.8μm, the addition amount of coarse silicon carbide particles is 20%, the particle size of coarse silicon carbide particles is 12μm, and other conditions remain unchanged.

[0063] Example 3

[0064] Compared with Example 1, silicon dioxide: silicon carbide: aluminum oxide: chromium sesquioxide = 3: 1.1: 1.1: 0.2, the particle size of powder ball milling is 4.2μm, the addition amount of coarse silicon carbide particles is 40%, the particle size of coarse silicon carbide particles is 13μm, and other conditions remain unchanged.

[0065] Example 4

[0066] Compared with Example 1, silicon dioxide: silicon carbide: aluminum oxide: chromium sesquioxide = 3: 1.2: 1.2: 0.4, the particle size of powder ball milling is 4.0μm, the addition amount of coarse silicon carbide particles is 25%, the particle size of coarse silicon carbide particles is 15μm, and other conditions remain unchanged.

[0067] Implementation Case 5

[0068] Compared with Implementation Case 1, silicon dioxide: silicon carbide: alumina: chromium sesquioxide = 2:1:1:0.3, and the particle size of the powder after ball milling is 4.0 μm, with other conditions remaining unchanged.

[0069] Implementation Case 6

[0070] Compared with Implementation Case 1, silicon dioxide: silicon carbide: alumina: chromium sesquioxide = 1:1:1:0.3, and the particle size of the powder after ball milling is 3.3 μm, with other conditions remaining unchanged.

[0071] Implementation Case 7

[0072] Compared with Implementation Case 1, silicon dioxide: silicon carbide: alumina: chromium sesquioxide = 4:1:1:0.3, and the particle size of the powder after ball milling is 4.0 μm, with other conditions remaining unchanged.

[0073] Implementation Case 8

[0074] Compared with Implementation Case 1, the addition amount of coarse silicon carbide particles is 10%, and the particle size of the coarse silicon carbide particles is 16 μm, with other conditions remaining unchanged.

[0075] Implementation Case 9

[0076] Compared with Implementation Case 1, the addition amount of coarse silicon carbide particles is 50%, and the particle size of the coarse silicon carbide particles is 13 μm, with other conditions remaining unchanged.

[0077] Implementation Case 10

[0078] Compared with Implementation Case 1, the ratio of the substrate to the binder is 1:2, with other conditions remaining unchanged.

[0079] Implementation Case 11

[0080] Compared with Implementation Case 1, the ratio of the substrate to the binder is 1:4, with other conditions remaining unchanged.

[0081] Implementation Case 12

[0082] Compared with Implementation Case 1, the sintering process is as follows: a. The temperature is 90 °C and the time is 8 hours to completely evaporate the moisture in the coating; b. Heat up to 450 °C at a rate of 3 °C / min and hold for 6 hours to allow the loss of crystal water in the coating; c. Heat up to 880 °C at a rate of 3 °C / min and hold for 4 hours; d. Heat up to 1200 °C at a rate of 3 °C / min, with other conditions remaining unchanged.

[0083] Implementation Case 13

[0084] Compared with Example 1, the sintering process is as follows: a. The temperature is 90 °C and the time is 8 hours, so that the moisture in the coating is completely evaporated; b. The temperature is raised to 450 °C at a rate of 3 °C / min and held for 6 hours, so that the crystal water in the coating is lost; c. The temperature is raised to 920 °C at a rate of 3 °C / min and held for 4 hours; d. The temperature is raised to 1300 °C at a rate of 3 °C / min, and other conditions remain unchanged.

[0085] Table 1 Experimental data table of the examples

[0086]

[0087] After the high-temperature resistant layer samples of the examples are held at different temperatures for 2 hours and then air-cooled to room temperature, the surface morphology of the samples is observed to check whether phenomena such as coating cracking and peeling occur. The results are shown in Table 2.

[0088] Table 2 Surface morphology of the high-temperature resistant layer samples of the examples after being held at different temperatures for 2 hours

[0089]

[0090] The wear-resistant and high-temperature resistant layer samples of the examples are tested for wear resistance. After the samples are weighed, the surface of the samples is impacted by sandblasting. For each sample, 10 positions of 1 dm 2 are fixed for sandblasting with a fixed time and pressure. After the flushing is completed, the floating dust on the surface is cleaned, and the change in mass before and after is compared to characterize the wear resistance of the coating. The results are shown in Table 3.

[0091] Table 3 Test results of the wear resistance of the wear-resistant and high-temperature resistant layer samples of the examples

[0092]

[0093]

[0094] With the increase in the addition amount of silica, a large amount of glass phase is easily formed at high temperatures, making the coating have a high density and be closely bonded to the substrate, but the addition degree is limited. The binder is the main influencing factor promoting the densification of the substrate and needs to have good wetting performance and bonding performance. When the binder content is low, the substrate is easily agglomerated into blocks and it is difficult to coat evenly; when the binder content is high, there is too little powder and it is not easy to coat on the surface. After drying at room temperature, cracks are likely to appear. With the increase in the content of coarse silicon carbide particles, the wear resistance is enhanced. When the addition amount reaches 30%, the wear resistance is the best. Therefore, through the temperature resistance and wear resistance tests of the samples, it can be seen that when the mass ratio of silica: silicon carbide: alumina: chromium sesquioxide is 3:1:1:0.3, the particle size of the powder after ball milling is 3.5 μm, the addition amount of coarse silicon carbide particles is 30%, the particle size is 15 μm, the mass ratio of the substrate to the binder is 1:3, and the four-stage sintering temperatures are 90, 500, 900, and 1250 °C, the temperature resistance and wear resistance of the samples are the best.

[0095] From the above examples, when the mass ratio of silica: silicon carbide: alumina: chromium sesquioxide = (1 - 4):(0.8 - 1.2):(0.8 - 1.2):(0.2 - 0.4) is used for proportioning, the high-temperature resistant temperature of the prepared high-temperature resistant material can reach above 1000 °C. The feeding device processed with this group of test materials can work continuously for 24 hours without deformation when feeding into the copper melting furnace from the furnace door, which is sufficient to meet the requirement of working continuously at high temperature in the furnace for 5 - 6 hours under normal working conditions. Compared with the prior art, the feeding device of the present invention can further reduce the weight, is more convenient and faster to dock with the furnace door, and is resistant to high temperature, wear and deformation, has a long service life, and effectively reduces the production cost.

Claims

1. A feeding device for a recycled copper melting furnace, characterized in that, the outer surface of the feeding device is coated with a layer of high-temperature resistant material, and the inner surface is coated with a layer of wear-resistant and high-temperature resistant material; the high-temperature resistant material is formed by mixing a high-temperature coating substrate and sodium silicate nonahydrate as a binder in a mass ratio of 1: (2 - 4), and the high-temperature coating substrate is composed of four anhydrous powder substances of silicon dioxide, silicon carbide, alumina, and chromium sesquioxide in a mass ratio of silicon dioxide: silicon carbide: alumina: chromium sesquioxide = (1 - 4): (0.8 - 1.2): (0.8 - 1.2): (0.2 - 0.4); the wear-resistant and high-temperature resistant material is formed by mixing a high-temperature coating substrate and sodium silicate nonahydrate as a binder in a mass ratio of 1: (2 - 4), and at the same time adding coarse silicon carbide particles for mixing. The addition amount of the coarse silicon carbide particles is 10 - 50% of the mass of the high-temperature coating substrate, and the particle size of the coarse silicon carbide particles is 10 - 20 μm; the high-temperature coating substrate is composed of four anhydrous powder substances of silicon dioxide, silicon carbide, alumina, and chromium sesquioxide in a mass ratio of silicon dioxide: silicon carbide: alumina: chromium sesquioxide = (1 - 4): (0.8 - 1.2): (0.8 - 1.2): (0.2 - 0.4).

2. A preparation method of the feeding device for the recycled copper melting furnace according to claim 1, characterized in that, the preparation method of the high-temperature resistant material includes the following steps: (1) Prepare a high-temperature coating substrate, and mix it in a mass ratio of silicon dioxide: silicon carbide: alumina: chromium sesquioxide of (1 - 4): (0.8 - 1.2): (0.8 - 1.2): (0.2 - 0.4). These four substances are all in anhydrous powder form; (2) Place the anhydrous powder weighed in step (1) in a ball mill for grinding. The grinding balls are zirconia balls with a particle size of 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 150 - 200 revolutions per minute, the time is 4 - 12 hours, the average particle size of the powder is 2 - 5 μm, and a small amount of anhydrous ethanol is added for mixing; (3) Place the ground powder in an oven for drying, the temperature is 50 - 80 °C, and the time is 6 - 10 hours; (4) Mix the powder prepared in step (3) and sodium silicate nonahydrate as a binder in a mass ratio of 1: (2 - 4), and stir with a magnetic stirrer for 2 - 4 h to make it evenly mixed. Thus, the preparation of the high-temperature resistant material is completed; the preparation method of the wear-resistant and high-temperature resistant material includes the following steps: (a) Prepare a high-temperature coating substrate, and mix it in a mass ratio of silicon dioxide: silicon carbide: alumina: chromium sesquioxide = (1 - 4): (0.8 - 1.2): (0.8 - 1.2): (0.2 - 0.4). These four substances are all in anhydrous powder form; (b) Place the anhydrous powder weighed in step (a) in a ball mill for grinding. The grinding balls are zirconia balls with a particle size of 5 mm, the ball-to-material ratio is 3:1, the rotation speed is 150 - 200 revolutions per minute, the time is 4 - 12 hours, the average particle size of the powder is 2 - 5 μm, and a small amount of anhydrous ethanol is added for mixing; (c) drying the ball-milled powder in a drying oven at a temperature of 50-80° C. for 6-10 hours; (d) The powder prepared in step (c) and the binder sodium silicate nonahydrate are mixed in a mass ratio of 1:(2-4), and coarse silicon carbide particles with a mass of 10-50% of the mass of the powder and a particle size of 10-20 μm are added, and stirred with a magnetic stirrer for 2-4 hours to make the mixture uniformly mixed, thereby completing the preparation of the high temperature resistant and wear resistant material.

3. A method for manufacturing a feeding device for a secondary copper smelting furnace according to claim 1, It is characterized in that The steps include: (1) Use a grinder to remove rust and burrs from the steel surface, degrease and rust, and dry; (2) Use water-abrasive sandpaper to polish in a cross-cross method to form regular patterns on the surface of the substrate; (3) Apply the high temperature resistant material and the wear resistant and high temperature resistant material evenly on the front and back sides of the steel, and cure them in a drying oven at 30-50°C for 24-48 hours to make the coating fit the steel completely; (4) Preheating the coated steel obtained in step (3) and then sintering it. The sintering process is mainly divided into four stages: a. The temperature is 80-95°C for 4-8 hours, and the water in the coating is completely evaporated; b. The temperature is increased to 450-500°C at a rate of 2-4°C / min and kept at this temperature for 4-8 hours, so that the crystal water in the coating is lost; c. The temperature is increased to 880-920°C at a rate of 2-4°C / min and kept at this temperature for 2-4 hours; d. The temperature is increased to 1200-1300°C at a rate of 2-4°C / min and kept at this temperature for 0.5-1 hour; (5) Cut the coated steel obtained in step (4) and manufacture the feeding device by welding, wherein the outer surface is coated with a high-temperature resistant coating, and the inner surface is coated with a high-temperature resistant and wear-resistant coating.

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