Highly efficient production device for fireproof bricks

Abstract

The utility model relates to refractory brick production technical field, concretely is refractory brick efficient production device, the refractory brick efficient production device, including pre -grinding exhaust device, pre -grinding exhaust device is connected with the waste heat dehumidifier through mechanical iron removal box, the waste heat dehumidifier is connected with the multi -column type down -pressing forming device through the blanking conveying device, the multi -column type down -pressing forming device is connected with the baking furnace through the pipeline, the inside of mechanical iron removal box is equipped with strong magnetic roller and arc material guide plate, strong magnetic roller is located in the top of arc material guide plate, and the transmission material preheating pipeline is equipped between mechanical iron removal box and waste heat dehumidifier. Through adjustable pitch harrow type loosening material ware of pre -grinding exhaust device and grinding wheel cooperation, realized raw material fully scattered, reduced green body internal gap, through strong magnetic roller of mechanical iron removal box and mobile scraper cooperation, realized raw material high -efficient removal of metal impurity, avoided the interference of impurity to the baking process, overall promoted refractory brick high temperature resistance and structural integrity, reduced product rejection rate.

Description

Technical Field

[0001] This utility model relates to the field of refractory brick production technology, specifically to a high-efficiency refractory brick production device. Background Technology

[0002] Refractory bricks are core supporting materials in high-temperature applications such as metallurgy, ceramics, and chemicals. The production process and equipment performance directly determine the stability of product quality. Currently, traditional refractory brick production equipment and supporting processes have been in use for a long time, but they have many shortcomings in raw material handling, environmental control, process integration, and molding quality.

[0003] Traditional pre-rolling degassing devices have a fixed spacing in their loosening structure, making them unsuitable for raw materials of different particle sizes. This results in insufficient particle dispersion, leading to voids within the green body after molding. Furthermore, there is no dedicated structure for removing metallic impurities (primarily iron) mixed in the raw materials. These impurities can easily form destructive components during subsequent firing, causing brick cracking and affecting the overall high-temperature resistance and service life of the refractory bricks. The moisture content of the raw materials fluctuates significantly due to storage conditions. Traditional devices lack specific dehumidification structures. When moisture content is high, the raw material's fluidity decreases, easily causing clumping and blockage in the feeding channel, requiring frequent manual unblocking. When moisture content is low, the raw material becomes heavily pulverized, leading to uneven material distribution during molding, resulting in a loose green body structure and easy deformation during subsequent firing. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high-efficiency refractory brick production device. By using the adjustable spacing rake-type loosener of the pre-rolling exhaust device in conjunction with the rolling wheel, the raw materials are fully dispersed, reducing the internal voids of the green bricks. By using the strong magnetic roller of the mechanical iron removal box in conjunction with the moving scraper, the metal impurities in the raw materials are efficiently removed, avoiding the interference of impurities on the firing process. Overall, the high temperature resistance and structural integrity of the refractory bricks are improved, and the product scrap rate is reduced.

[0005] This utility model is achieved using the following technical solution: The aforementioned high-efficiency refractory brick production device includes a pre-rolling exhaust device, which is connected to a waste heat dehumidifier via a mechanical iron removal box. The waste heat dehumidifier is connected to a multi-column pressing molding device via a material feeding conveying device. The multi-column pressing molding device is connected to a calcining furnace via a pipeline. The mechanical iron removal box is equipped with a strong magnetic roller and an arc-shaped guide plate inside, with the strong magnetic roller located above the arc-shaped guide plate. A material transfer preheating pipeline is provided between the mechanical iron removal box and the waste heat dehumidifier.

[0006] The pre-rolling exhaust device is equipped with a pre-rolling exhaust box, inside which are an adjustable-spacing rake-type loosener and a rolling wheel driven by a drive motor. The adjustable-spacing rake-type loosener and the rolling wheel are spaced apart.

[0007] The top of the pre-rolling exhaust device is equipped with a buffer tank, which is connected to an induced draft fan via a detachable filter box. The detachable filter box contains a detachable filter screen.

[0008] The mechanical iron removal box is equipped with a feed inlet located directly above the strong magnetic roller. The material transfer preheating pipe is equipped with an insulation sleeve and a preheating coil on the outside. The roasting furnace is connected to the preheating coil through a waste heat recovery pipe.

[0009] The feeding conveying device is equipped with a manually adjustable feeding hopper, and an elevator is provided between the waste heat dehumidifier and the manually adjustable feeding hopper. A feeding valve is provided below the manually adjustable feeding hopper.

[0010] The material feeding and conveying device is equipped with a conveyor belt inside, and an inclined material collection plate is provided below the conveyor belt. A material collection box is connected to the inclined material collection plate.

[0011] The outer side of the strong magnetic roller is provided with a movable scraper, which is annular and whose inner edge is tangent to the outer edge of the strong magnetic roller.

[0012] The mobile scraper is equipped with a scrap collection box below it, and the scrap collection box has a scrap collection box outlet.

[0013] The pre-rolling exhaust device consists of a pre-rolling exhaust box, a drive motor, an adjustable-spacing rake-type loosener, a rolling mill, a buffer tank, a detachable filter screen box, and an induced draft fan. The adjustable-spacing rake-type loosener and the rolling mill are spaced apart within the pre-rolling exhaust box; the spacing between the loosening teeth can be manually adjusted via bolts, and the tooth ends are coated with a wear-resistant coating. The outlet of the buffer tank connects to the detachable filter screen box, which contains a detachable filter screen, and the top is connected to the induced draft fan. The adjustable spacing design allows for adaptation to different particulate raw materials, working in conjunction with the rolling mill to fully disperse the raw materials and reduce internal voids in the green body. The detachable filter screen efficiently intercepts fine dust in the dusty exhaust gas, reducing environmental emissions and facilitating dust recovery and reuse. The wear-resistant coating on the loosening teeth extends the device's service life and reduces maintenance frequency.

[0014] The mechanical iron removal box includes a box body, a strong magnetic roller, an arc-shaped guide plate, a movable scraper, and an iron filings collection box. The strong magnetic roller is horizontally mounted inside the box body, above the arc-shaped guide plate, with the feed inlet at the top of the box body directly opposite the strong magnetic roller. The movable scraper is annular, with its inner edge tangent to the outer edge of the strong magnetic roller, and a detachable iron filings collection box below it. A material transfer preheating pipe is installed between the box body and the waste heat dehumidifier. The pipe has an insulation sleeve and a preheating coil on its outside, and the preheating coil is connected to the roasting furnace through a waste heat recovery pipe. The arc-shaped guide plate ensures that the raw material flows evenly through the strong magnetic roller, ensuring sufficient adsorption of metal impurities. The annular movable scraper thoroughly removes impurities from the surface of the strong magnetic roller, preventing secondary mixing of raw materials. The iron filings collection box provides centralized treatment of impurities, ensuring continuous and stable iron removal. The insulation sleeve and preheating coil of the material transfer preheating pipe enable preheating of the raw material and utilization of waste heat, improving the efficiency of subsequent dehumidification.

[0015] The material transfer preheating pipe is wrapped with an insulation sleeve, inside which a preheating coil is installed. The preheating coil is connected to the roasting furnace via a waste heat recovery pipe. The waste heat dehumidifier is connected to the end of the material transfer preheating pipe and has multiple layers of perforated guide plates inside. An elevator is installed between the waste heat dehumidifier and the manually adjustable discharge hopper. The insulation sleeve reduces waste heat loss; the linkage between the preheating coil and the waste heat of the roasting furnace enables preheating of raw materials and energy recycling; the perforated guide plates inside the waste heat dehumidifier extend the contact time between the raw materials and waste heat, ensuring uniform dehumidification, improving the flowability of the raw materials, and preventing subsequent discharge blockage; the elevator enables vertical transportation of raw materials, reducing manual handling.

[0016] The material feeding and conveying device consists of a manually adjustable feeding hopper, an elevator, a feeding valve, a conveyor belt, an inclined collecting plate, and a collecting box. The manually adjustable feeding hopper is equipped with a manual crank (for adjusting valve opening) and a manually adjustable frequency vibrator. The conveyor belt is horizontally positioned with an inclined collecting plate underneath, the end of which is connected to the collecting box. The elevator is connected to a waste heat dehumidifier and the manually adjustable feeding hopper. The manual crank and the adjustable frequency vibrator allow for flexible adjustment of the feeding amount and vibration frequency, ensuring stable feeding. The conveyor belt enables efficient transport of raw materials to the forming device. The inclined collecting plate and the collecting box work together to recycle and reuse raw materials scattered on the conveyor belt, reducing material waste.

[0017] The multi-column pressing forming device employs multiple sets of mechanical transmission columns arranged in an isosceles triangle (one set at the center and two sets at the edges). Each set of transmission columns is equipped with a manual pressure regulating valve and a pressure gauge, with the forming head connected to the bottom, corresponding to the forming mold below. The device is connected to the roasting furnace via pipelines. Through multiple sets of transmission columns and an independent pressure regulating structure, the pressure at the center and edges can be adjusted separately, compensating for differences in mold force and ensuring uniform pressure on the raw material. The pressure gauge enables real-time monitoring of the pressure value, facilitating precise manual control, ensuring consistent green body density, and reducing deformation during subsequent roasting.

[0018] The roasting furnace is equipped with a raw material roasting chamber, externally connected to a waste heat recovery pipeline. The end of the pipeline connects to the preheating coil of the material transfer preheating pipeline, forming a waste heat circulation path. The device is connected to a multi-column downward pressing forming device via pipeline to receive the formed green billets. By linking the waste heat recovery pipeline with the preheating coil, the waste heat from roasting is recycled, providing energy for preheating and dehumidifying the raw materials, thus reducing energy consumption. The connection with the forming device via pipeline enables efficient transport of green billets, reducing the quality impact during transfer, which aligns with the concept of green production.

[0019] The adjustable spacing of the rake-type loosener is adjusted according to the particle size of the raw material (adjust to 2mm when the proportion of 2-4mm particles is >10%, and to 5mm when it is ≤5%); the drive motor speed is 100-150r / min, and the pre-rolling time is 5-6min; the induced draft fan power is 0.8-1.2kW to ensure that the pressure in the pre-rolling exhaust box is maintained at 0.03-0.05MPa. The magnetic field strength of the strong magnetic roller is 12000-15000 Gauss, and the rotation speed is 10-15r / min (synchronized with the rolling wheel); the distance between the moving scraper and the strong magnetic roller is 0.5mm to ensure that iron impurities are thoroughly scraped off. The waste heat temperature of the calcining furnace flue gas is 120-180℃, and the raw material temperature in the material transfer preheating pipe is raised to 40-45℃ through the preheating coil; the hot air temperature in the waste heat dehumidifier is 45-60℃, and the raw material stays in the dehumidifier for 5-10min to ensure that the humidity drops to 3%-5%. The manually adjustable hopper discharge rate is controlled at 5-10 kg / min; the conveyor belt speed is 0.8 m / s; the inclined collection plate has an angle of 30° to ensure that scattered raw materials are smoothly collected into the collection box. The multi-column pressing device has a central drive column pressure of 0.8 MPa and an edge drive column pressure of 0.95 MPa, a pressing time of 1-1.5 min, and a pressure holding period of 30 s after forming before pressure release.

[0020] Compared with the prior art, the beneficial effects of this utility model are: (1) By using the adjustable spacing rake-type loosening device of the pre-rolling exhaust device in conjunction with the rolling wheel, the raw materials are fully dispersed, reducing the internal voids of the green brick; by using the strong magnetic roller of the mechanical iron removal box in conjunction with the moving scraper, the metal impurities in the raw materials are efficiently removed, avoiding the interference of impurities on the firing process, improving the high temperature resistance and structural integrity of the refractory bricks, and reducing the scrap rate of the products.

[0021] (2) By connecting the buffer tank of the pre-rolling exhaust device with the detachable filter box in series, the fine dust is effectively intercepted, dust emissions are reduced, and environmental protection standards are met. The dust recycling and reuse of the detachable filter reduces raw material loss. At the same time, the convenient disassembly and cleaning of the filter reduces secondary pollution during maintenance.

[0022] (3) By cooperating with the preheating coil of the waste heat recovery pipe of the roasting furnace and the preheating pipe of the material transfer and the waste heat dehumidifier, the humidity of the raw materials is precisely controlled, avoiding the problem of material blockage caused by excessive humidity or dusting caused by excessive humidity; by adjusting the valve of the manually adjustable feeding hopper and the vibrator, the feeding amount and the speed of the conveyor belt are precisely matched, improving the stability of the feeding and forming process.

[0023] (4) By optimizing the process sequence of “pre-rolling exhaust → mechanical iron removal → waste heat dehumidification → material feeding and forming” and the process connection of the sealed material guiding structure, the manual transfer link was eliminated, reducing labor intensity; by recycling the waste heat of the roasting furnace, the additional heating equipment was eliminated, reducing energy consumption and meeting the requirements of energy-saving production.

[0024] (5) Through the multi-column pressing molding device with multiple sets of transmission columns and independent pressure adjustment structure, the pressure difference between the edge and center of the mold is compensated, so that the raw material is subjected to uniform force; through precise pressure control, the green body density distribution is consistent, reducing the dimensional deviation after subsequent baking and reducing the manpower and time cost of grinding and correction process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the high-efficiency refractory brick production device of this utility model; Figure 2 This is a radial cross-sectional view of the strong magnetic roller of this utility model; Figure 3 This is a schematic diagram of the structure of the strong magnetic roller of this utility model; In the diagram: 1. Pre-rolling exhaust device; 2. Mechanical iron removal box; 3. Waste heat dehumidifier; 4. Feeding conveyor device; 5. Multi-column pressing forming device; 6. Calcination furnace; 7. Pre-rolling exhaust box; 8. Adjustable spacing rake-type loosener; 9. Buffer tank; 10. Removable filter box; 11. Removable filter; 12. Roller; 13. Strong magnetic roller; 14. Arc-shaped guide plate; 15. Feeding preheating pipe; 16. Insulation jacket; 17. Preheating coil; 18. Elevator; 19. Manually adjustable feeding hopper; 20. Feeding valve; 21. Conveyor belt; 22. Inclined collecting plate; 23. Waste heat recovery pipe; 24. Collection box; 25. Mobile scraper; 26. Iron filings collection box; 27. Iron filings collection box outlet. Detailed Implementation

[0026] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1 like Figure 1As shown, the high-efficiency refractory brick production device includes a pre-rolling exhaust device 1. The pre-rolling exhaust device 1 is connected to a waste heat dehumidifier 3 via a mechanical iron removal box 2. The waste heat dehumidifier 3 is connected to a multi-column pressing molding device 5 via a material conveying device 4. The multi-column pressing molding device 5 is connected to a calcining furnace 6 via a pipeline. The mechanical iron removal box 2 is equipped with a strong magnetic roller 13 and an arc-shaped guide plate 14. The strong magnetic roller 13 is located above the arc-shaped guide plate 14. A material transfer preheating pipeline 15 is provided between the mechanical iron removal box 2 and the waste heat dehumidifier 3. Figure 2-3 As shown, the mechanical iron removal box 2 includes a box body, a strong magnetic roller 13, an arc-shaped guide plate 14, a moving scraper 25, and an iron filings collection box 26. The arc-shaped guide plate 14 ensures that the raw material flows evenly through the strong magnetic roller 13, guaranteeing sufficient adsorption of metal impurities. The annular moving scraper 25 thoroughly removes impurities from the surface of the strong magnetic roller 13, preventing secondary mixing of raw materials. The pre-grinding exhaust device 1 is equipped with a pre-grinding exhaust box 7. Inside the pre-grinding exhaust box 7 are adjustable-spacing rake-type looseners 8 and grinding wheels 12, driven by a drive motor. The adjustable-spacing rake-type looseners 8 and grinding wheels 12 are spaced apart. A buffer tank 9 is located at the top of the pre-grinding exhaust device 1. The buffer tank 9 is connected to an induced draft fan via a detachable filter box 10, which contains a detachable filter screen 11. A feed inlet is located above the mechanical iron removal box 2, directly above the strong magnetic roller 13. An insulation sleeve 16 and a preheating coil 17 are installed on the outside of the material conveying preheating pipe 15. The roasting furnace 6 is connected to the preheating coil 17 via a waste heat recovery pipe 23. A manually adjustable feed hopper 19 is installed on the feeding conveying device 4. An elevator 18 is located between the waste heat dehumidifier 3 and the manually adjustable feed hopper 19. A feed valve 20 is located below the manually adjustable feed hopper 19. A conveyor belt 21 is installed inside the feeding conveying device 4. An inclined collecting plate 22 is located below the conveyor belt 21, and a collection box 24 is connected to the inclined collecting plate 22. A movable scraper 25 is located on the outside of the strong magnetic roller 13. The movable scraper 25 is annular, and its inner edge is tangent to the outer edge of the strong magnetic roller 13. A scrap collection box 26 is located below the movable scraper 25, and a scrap collection box outlet 27 is located on the scrap collection box 26.

[0028] The above-mentioned high-efficiency refractory brick production device includes the following steps during operation: (1) The raw refractory material is put into the pre-rolling exhaust box 7 of the pre-rolling exhaust device 1, the drive motor is started, and the rolling wheel 12 and the adjustable spacing rake loosener 8 are driven to run to crush and disperse the raw material; the induced draft fan is started at the same time to draw the dusty exhaust gas generated during the pre-rolling process into the buffer tank 9, and after being filtered by the detachable filter box 10, it is discharged to complete the preliminary pretreatment of the raw material. The pre-rolled raw material falls from the discharge port of the pre-rolling exhaust box 7 into the feed port of the mechanical iron removal box 2, and slowly falls along the arc guide plate 14. When it passes the strong magnetic roller 13, the metal impurities in the raw material are adsorbed by the strong magnetic roller 13; as the strong magnetic roller 13 rotates, the adsorbed impurities are scraped off by the moving scraper 25 and fall into the iron filings collection box 26 for centralized treatment. The iron-removed raw material enters the waste heat dehumidifier 3 through the material transfer preheating pipe 15. (2) Open the valve of the waste heat recovery pipe 23 of the calcining furnace 6 so that the waste heat generated by calcination can preheat the raw material in the material transfer preheating pipe 15 through the preheating coil 17; after the raw material enters the waste heat dehumidifier 3, it can fully contact the waste heat to achieve deep dehumidification and ensure that the raw material humidity meets the molding requirements. The dehumidified raw material is transported to the manually adjustable feeding hopper 19 by the elevator 18. The feeding valve 20 is manually adjusted to control the amount of raw material falling, and the frequency of the feeding hopper vibrator is adjusted according to the flowability of the raw material; after the raw material falls into the conveyor belt 21, it is transported to the multi-column pressing molding device 5 by the conveyor belt 21. The inclined collecting plate 22 below the conveyor belt 21 collects the scattered raw material and collects it into the collecting box 24 for recycling and reuse. (3) Start the multi-column pressing molding device 5 and set the pressure of the center and edge transmission columns by the manual pressure regulating valve to press the raw material in the mold to form refractory brick green. After being formed, the green body is fed into the roasting furnace 6 through a pipeline for roasting. The waste heat generated during the roasting process is continuously transported to the preheating coil 17 through the waste heat recovery pipeline 23 to realize the recycling of waste heat.

Claims

1. A high-efficiency refractory brick production device, characterized in that, It includes a pre-rolling exhaust device (1), which is connected to a waste heat dehumidifier (3) through a mechanical iron removal box (2). The waste heat dehumidifier (3) is connected to a multi-column pressing molding device (5) through a feeding conveying device (4). The multi-column pressing molding device (5) is connected to a roasting furnace (6) through a pipe. The mechanical iron removal box (2) is equipped with a strong magnetic roller (13) and an arc-shaped guide plate (14). The strong magnetic roller (13) is located above the arc-shaped guide plate (14). A material transfer preheating pipe (15) is provided between the mechanical iron removal box (2) and the waste heat dehumidifier (3).

2. The high-efficiency refractory brick production device according to claim 1, characterized in that, The pre-rolling exhaust device (1) is equipped with a pre-rolling exhaust box (7). Inside the pre-rolling exhaust box (7) are adjustable-spacing rake-type looseners (8) and rolling wheels (12) driven by a drive motor. The adjustable-spacing rake-type looseners (8) and rolling wheels (12) are spaced apart.

3. The high-efficiency refractory brick production device according to claim 1, characterized in that, The top of the pre-rolling exhaust device (1) is provided with a buffer tank (9), and the buffer tank (9) is connected to an induced draft fan through a detachable filter box (10). The detachable filter box (10) is provided with a detachable filter (11).

4. The high-efficiency refractory brick production device according to claim 1, characterized in that, The mechanical iron removal box (2) is provided with a feed inlet at the top, which is located directly above the strong magnetic roller (13). The material transfer preheating pipe (15) is provided with an insulation sleeve (16) and a preheating coil (17) on the outside. The roasting furnace (6) is connected to the preheating coil (17) through the waste heat recovery pipe (23).

5. The high-efficiency refractory brick production device according to claim 1, characterized in that, The feeding conveying device (4) is equipped with a manually adjustable feeding hopper (19), and an elevator (18) is provided between the waste heat dehumidifier (3) and the manually adjustable feeding hopper (19). A feeding valve (20) is provided below the manually adjustable feeding hopper (19).

6. The high-efficiency refractory brick production device according to claim 1, characterized in that, The material feeding and conveying device (4) is equipped with a conveyor belt (21) inside, and an inclined material collection plate (22) is provided below the conveyor belt (21). A material collection box (24) is connected to the inclined material collection plate (22).

7. The high-efficiency refractory brick production device according to claim 1, characterized in that, The strong magnetic roller (13) is provided with a movable scraper (25) on its outer side. The movable scraper (25) is annular, and the inner edge of the movable scraper (25) is tangent to the outer edge of the strong magnetic roller (13).

8. The high-efficiency refractory brick production apparatus according to claim 7, characterized in that, The mobile scraper (25) is provided with a scrap collection box (26) below it, and the scrap collection box (26) is provided with a scrap collection box outlet (27).

Images