A vertical push type aluminum ingot heating furnace

Abstract

The utility model discloses a vertical push type aluminum ingot heating furnace, including the furnace body, the furnace body is evenly provided with heating area, is provided with the flow guide mechanism in each heating area respectively, and the mode combination of the female joint is used between each flow guide mechanism, and the flow guide mechanism includes the heat preservation layer and the flow layer, and the fixed assembly is fixedly assembled between the flow layer and the furnace body. Compared with the traditional flow guide structure in the process of using, one is that can make the box body structure fully absorb the thermal state expansion of furnace body in the process of using, reduces the deformation of overall structure, keeps the stability of the air duct in the flow guide mechanism, the second can prevent the fiber or particulate in the heat preservation layer from entering the circulating air duct, and adheres to the surface of aluminum ingot, forms the product defect.

Description

Technical Field

[0001] This utility model relates to the field of aluminum ingot heating furnace technology, specifically to a vertical pusher aluminum ingot heating furnace. Background Technology

[0002] Traditional vertical pusher aluminum ingot heating furnaces have outstanding advantages in large-scale continuous production, high-efficiency heating, and space utilization, making them the mainstream equipment for aluminum ingot heating.

[0003] The conventional design of a traditional vertical pusher aluminum ingot heating furnace is as follows: The outermost part of the furnace body is a steel plate enclosed by a steel frame. Inside the steel plate is an insulation layer filled with rock wool and fiber blankets. The inner lining of the flow guiding system is tightly attached to the insulation layer. To mitigate thermal expansion and contraction and for installation purposes, the inner lining is divided into several pieces of appropriate size. Round or elliptical holes are opened around the perimeter and center of each inner lining to facilitate anchor bolt fixation. The edges of two adjacent inner lining pieces are designed with a pressing and fixing structure; one piece contains a pin, and the other has a round or elliptical hole. Rows of anchor bolts are welded to the inner side of the steel plate. These bolts are generally of two lengths: short anchor bolts, whose length does not exceed the thickness of the insulation layer, are used to install and fix the rock wool in the insulation layer; long anchor bolts, whose length exceeds the thickness of the insulation layer, generally have a central through hole at the end for pin fixing. The long anchor bolts pass through the round or elliptical holes in the insulation layer and the inner lining, and are fixed together by pads (shims) tightly attached to the inner lining and through the pins. The baffles and guide plates of the flow guiding system are then fixed to the inner liner.

[0004] One of the drawbacks of the above-mentioned conventional design is that the inner lining plate separating the insulation layer and the air guiding system has many holes, which cannot be sealed tightly by gaskets alone. As a result, ceramic fibers or rock wool containing slag balls in the insulation layer can enter the furnace through these gaps from the air guiding system and adhere to the surface of the aluminum ingot. This forms a pressing defect during the subsequent rolling process. Since high-end aluminum plate products (such as aviation plates, battery foils, PS plate bases, etc.) have extremely high requirements for the surface quality and internal uniformity of aluminum ingots, this affects the yield.

[0005] The second drawback of the above conventional design is that a large number of inner lining plates are fixed by long anchor rods. These long anchor rods connect the high-temperature flow guiding system and the low-temperature furnace shell steel plate, forming a "thermal bridge", which increases heat dissipation from the furnace surface and is not conducive to energy saving. Utility Model Content

[0006] The purpose of this utility model is to provide a vertical pusher aluminum ingot heating furnace to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a vertical push aluminum ingot heating furnace, comprising a furnace body, wherein heating zones are uniformly arranged within the furnace body, and a flow guiding mechanism is provided in each heating zone. The flow guiding mechanisms are combined in a socket-insertion manner. Each flow guiding mechanism includes a heat insulation layer and a flow guiding layer, and a fixing component is fixedly assembled between the flow guiding layer and the furnace body. The flow guide layer includes a furnace top box, a furnace side box, four corner boxes, and a furnace bottom box. The furnace top box, furnace side box, four corner boxes, and furnace bottom box are connected by a socket joint, and the socket joint is arranged so that the downstream box wraps around the upstream box in the direction of the circulating air.

[0008] Preferably, the flow channel inside the furnace bottom box has a wedge-shaped channel structure with narrow openings on both sides and a wide opening in the middle.

[0009] Preferably, the fixing assembly includes a fixing steel plate and a fixing steel section. The fixing steel plate is fixedly connected to the inner cavity side wall of the furnace body, the fixing steel section is fixedly connected to the side wall of the fixing steel plate, and the fixing member is fixedly connected to the side wall of the fixing steel section.

[0010] Preferably, a heat-insulating fiber pad is fixedly assembled between the fixed steel section and the fixed steel plate.

[0011] Preferably, the fastener is shaped like a hook or a support.

[0012] Preferably, a circulating fan and a cooling fan are fixedly mounted on the top of the furnace body.

[0013] Preferably, a thermocouple is fixedly mounted at the bottom of the heating zone.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: A vertical push-type aluminum ingot heating furnace is firstly equipped with a modular flow guiding mechanism. Each flow guiding mechanism is assembled by a socket joint. Compared with traditional flow guiding structures, during use, firstly, the box structure can fully absorb the thermal expansion of the furnace body during use, reducing the deformation of the overall structure and maintaining the stability of the air duct within the flow guiding mechanism; secondly, it can prevent fibers or particles in the insulation layer from entering the circulating air duct and adhering to the surface of the aluminum ingot, forming product defects. Simultaneously, this utility model also includes a fixing component for securing the box body. The fixing component combines fixing steel plates and fixing profiles, with a heat-insulating fiber pad added between the fixing profiles and the fixing steel plates. This design has multiple advantages. Firstly, the heat-insulating fiber pad can effectively block the formation of thermal bridges, reducing heat dissipation from the furnace body surface due to heat conduction, thereby improving the overall energy-saving effect of the heating furnace. Secondly, the fasteners in the fixing components are designed as hooks or supports, which can be flexibly selected according to actual installation needs. This ensures a stable connection between the flow guide layer and the furnace body, and facilitates subsequent maintenance and replacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the furnace body of this utility model.

[0016] Figure 2 This is a schematic diagram of the heating zone of this utility model.

[0017] Figure 3 This is a structural schematic diagram of the fixing component of this utility model.

[0018] Figure 4 for Figure 3 Detailed image of point a in the image.

[0019] Figure 5 This is a top view of the furnace body of this utility model.

[0020] Figure 6 for Figure 2 Detailed image of point b in the image.

[0021] In the diagram: 1. Furnace body; 2. Heating zone; 3. Flow guiding mechanism; 31. Insulation layer; 32. Flow guiding layer; 321. Furnace top box; 322. Furnace side box; 323. Four corner boxes; 324. Furnace bottom box; 4. Fixing components; 41. Fixing steel plate; 42. Fixing profile; 43. Heat insulation fiber pad; 44. Fixing parts; 5. Circulating fan; 6. Cooling fan; 7. Burner; 8. Thermocouple. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This utility model provides a technical solution: a vertical pusher aluminum ingot heating furnace, comprising a furnace body 1. The interior of the furnace body 1 is evenly divided into several heating zones 2, and each heating zone 2 is equipped with a flow guiding mechanism 3. The flow guiding mechanism 3 has been redesigned, and the use of a modular flow guiding mechanism 3 can reduce the entry of fiber slag balls into the flow guiding system. In existing flow guiding systems, slag-free fiber blankets are usually selected on the fiber blanket adjacent to the inner lining plate, which is relatively expensive. With this structure, the slag-free fiber blanket can be replaced with an ordinary fiber blanket. Although the overall modular structure of the flow guiding system increases the cost, combined with the reduction in the cost of the fiber blanket, the overall cost is still cost-effective.

[0024] like Figure 2As shown, the flow guiding mechanism 3 includes an insulation layer 31 and a flow guiding layer 32. The flow guiding layer 32 is located inside the insulation layer 31. The outer side of the insulation layer 31 is a furnace shell steel plate, and the inner side is filled with insulation material. The flow guiding layer 32 is composed of a furnace top box 321, a furnace side box 322, four corner boxes 323, and a furnace bottom box 324. The boxes are connected to each other by a socket joint. The socket joint is set in the direction of the circulating air, with the downstream box wrapping around the upstream box. This structure has two advantages. First, it can allow the box structure to fully absorb the thermal expansion of the furnace body 1 during use, reduce the deformation of the overall structure, and maintain the stability of the air duct inside the flow guiding mechanism 3. Second, it can prevent fibers or particles in the insulation layer 31 from entering the circulating air duct and adhering to the surface of the aluminum ingot, thus forming product defects.

[0025] The furnace top box 321, furnace side box 322, four corner box 323 and furnace bottom box 324 are all welded together with inner lining plates, partitions and guide plates to form a bellows style. Each box is provided with a fixing component 4 between itself and the insulation layer 31. The fixing component 4 is used to connect and fix the box to the insulation layer 31 to maintain the stability between the boxes.

[0026] Each box has 4-8 fixing points on its exterior, all of which are located within the insulation layer 31. The fixing points at the bottom of the furnace are supported, while the other fixing points are suspended.

[0027] like Figure 3 and Figure 4 As shown, the fixing component 4 adopts a "broken bridge" structure (i.e., thermal bridge blocking). The fixing component 4 includes a fixing steel plate 41 and a fixing steel section 42. The fixing steel plate 41 is welded and fixed to the inner wall of the furnace shell steel plate. The fixing steel section 42 is fixedly connected to the side wall of the fixing steel plate 41 by fastening bolts. A heat-insulating fiber pad 43 is installed between the fixing steel section 42 and the fixing steel plate 41. The heat-insulating fiber pad 43 prevents the heat of the circulating hot air in the flow guiding mechanism 3 from being transferred to the furnace shell steel plate through the fixing component 4. The side wall of the fixing steel section 42 is fixedly fitted with a fastener 44 by fastening nuts. The fastener 44 is in the form of a hook or a support. The hook-shaped fastener is used to fix the side wall of the box body except for the furnace bottom, and the support-shaped fastener is used to fix the furnace bottom box body 324. The entire module of the flow guiding mechanism 3 is fixed by the fixing components 4 at various positions. The adjacent flow guiding mechanisms 3 also adopt the same socket connection method as the connection method between the boxes, and at the same time, they have the same effect.

[0028] The top of the furnace body 1 is uniformly and fixedly equipped with circulating fans 5 and cooling fans 6. The circulating fans 5 and cooling fans 6 are electrically connected to an external power source. The input end of the circulating fan 5 is connected to the external environment, and the output end of the circulating fan 5 is connected to the air duct in the guide mechanism 3. The number of circulating fans 5 and cooling fans 6 matches the number of guide mechanisms 3. The circulating fans 5 drive the external air and the air in the guide mechanism 3 to circulate. The input end of the cooling fans 6 is connected to a separately set cooling air duct, and the output end of the cooling fans 6 is close to the air inlet of the circulating fans 5. With this structural design, the cooling air and the hot air in the furnace can be drawn in and pressurized by the circulating fans 5 together, and then sprayed into the furnace through the circulating air ducts of the furnace top, furnace side and furnace bottom. The circulating air is mixed more evenly and there will be no uneven heating and cooling, which is conducive to the uniform cooling of the ingots in the furnace and prevents uneven heating and cooling.

[0029] The flow channel inside the furnace bottom box 324 is designed with a wedge-shaped channel structure with narrow openings on both sides and a wide opening in the middle. The wedge-shaped flow channel helps to improve the uniformity of heat transfer of circulating air in the flow guiding mechanism 3.

[0030] The top of the furnace body 1 is symmetrically fitted with burners 7 around the circulating fan 5. The two burners 7 are located in the furnace side boxes 322 on both sides. This layout allows the burner flame to be directly injected into the vertical guide channels on both sides without impacting the guide plates, thereby improving the life of the guide mechanism 3 and extending the overhaul cycle. The burner 7 is preferably a preheating burner, which can preheat the combustion air to above 400°C or even above 500°C, and can recover heat to the maximum extent to improve the furnace thermal efficiency. At the same time, the pipeline design is simplified and the wrapping of the hot air duct is eliminated.

[0031] Thermocouple 8 is fixedly installed at the bottom of heating zone 2. Thermocouple 8 is used to measure the temperature of the circulating air after reheating. The circulating air temperature measured at this time is in a state where the high-temperature flue gas from the burner 7 is mixed for a longer and more uniform time. It is the circulating air temperature before heating the aluminum ingot, which has more accurate guiding significance for preventing the aluminum ingot from overheating and interlocking protection.

Claims

1. A vertical pusher aluminum ingot heating furnace, comprising a furnace body (1), characterized in that, Heating zones (2) are uniformly arranged inside the furnace body (1). Each heating zone (2) is provided with a flow guiding mechanism (3). The flow guiding mechanisms (3) are combined in a socket manner. The flow guiding mechanism (3) includes a heat insulation layer (31) and a flow guiding layer (32). A fixing component (4) is fixedly assembled between the flow guiding layer (32) and the furnace body (1). The flow guide layer (32) includes a furnace top box (321), a furnace side box (322), a four-corner box (323), and a furnace bottom box (324). The furnace top box (321), furnace side box (322), four-corner box (323), and furnace bottom box (324) are connected by a socket, and the socket direction is set so that the downstream box covers the upstream box in the direction of the circulating air.

2. The vertical pusher aluminum ingot heating furnace according to claim 1, characterized in that: The flow channel inside the furnace bottom box (324) has a wedge-shaped channel structure with narrow openings on both sides and a wide opening in the middle.

3. The vertical pusher aluminum ingot heating furnace according to claim 1, characterized in that: The fixing component (4) includes a fixing steel plate (41) and a fixing steel section (42). The fixing steel plate (41) is fixedly connected to the inner cavity side wall of the furnace body (1). The side wall of the fixing steel plate (41) is fixedly connected to the fixing steel section (42), and the side wall of the fixing steel section (42) is fixedly connected to the fixing member (44).

4. A vertical pusher aluminum ingot heating furnace according to claim 3, characterized in that: A heat-insulating fiber pad (43) is fixedly assembled between the fixed steel section (42) and the fixed steel plate (41).

5. A vertical pusher aluminum ingot heating furnace according to claim 3, characterized in that: The fastener (44) is shaped like a hook or a support.

6. A vertical pusher aluminum ingot heating furnace according to claim 1, characterized in that: The top of the furnace body (1) is fixedly equipped with a circulating fan (5) and a cooling fan (6).

7. A vertical pusher aluminum ingot heating furnace according to claim 1, characterized in that: Thermocouple (8) is fixedly mounted at the bottom of the heating zone (2).

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