Aluminum ingot heating furnace

Abstract

The utility model discloses an aluminum ingot heating furnace which comprises a heating furnace shell internally provided with a heating cavity, a plurality of inner partition plates are arranged on the inner wall of the heating furnace shell, and the heating cavity is divided into an inner heating area and a plurality of outer heating areas communicated with the inner heating area by the inner partition plates; a plurality of aluminum ingots to be heated are annularly and symmetrically placed in the inner heating area, a plurality of mounting holes communicated with the outer heating area are formed in the outer wall of the heating furnace shell, and combustors are mounted in the mounting holes; a smoke outlet is formed in the middle of the top end of the heating furnace shell. A plurality of aluminum ingots to be heated are annularly, rotationally and symmetrically distributed in the inner heating area, hot fluid is output from the combustors on the side wall to enter the outer heating areas, and the hot fluid in the outer heating areas jointly flows to the inner heating area. Therefore, different aluminum ingots can obtain the same heating effect under the condition of the same fuel quantity and heating time, the temperature uniformity of the surfaces of the aluminum ingots is improved, and the heating quality of all the aluminum ingots is improved on the whole.

Description

Technical Field

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

[0002] Aluminum is an abundant resource in the Earth's crust and a recyclable metallic material. It also boasts advantages such as light weight, high strength, and corrosion resistance. In the metal materials industry, the aluminum and aluminum alloy processing industry is second only to the steel industry, with large output and a wide variety of products. It is widely used in aerospace, automobile manufacturing, electronics, and many other fields. Currently, my country has become a major player in the aluminum industry and aluminum processing.

[0003] After aluminum is mined, most of it is first processed into standard parts such as plates, tubes, and strips, and then further processed into aluminum products according to actual needs. Before being further processed into aluminum products, the standard parts need to be preheated, and the structural design of the heating furnace has a great influence on the heating effect of the standard parts.

[0004] Because aluminum has a low melting point (around 660℃), the flame cannot directly hit the aluminum ingots when heating them in a gas combustion furnace. Therefore, traditional aluminum ingot heating furnaces use baffles to divide the furnace chamber into two "heating zones." The burner injects fuel into one heating zone, where combustion occurs. The baffle blocks some of the radiant heat, and the hot fluid cools as it moves into the second heating zone containing the aluminum ingots, thus keeping the furnace temperature below the melting point of the aluminum ingots. However, existing aluminum ingot heating furnaces often have a square furnace chamber, with the aluminum ingots arranged in an M*N array within the heating zones. This structure results in a lack of symmetry in the heating of the aluminum ingots: different locations on the ingot, and even different areas of the same ingot, will experience different heating conditions. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides an aluminum ingot heating furnace that solves the problem of uneven heating of aluminum ingots in existing aluminum ingot heating furnaces.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A furnace for heating aluminum ingots is provided, comprising a furnace shell with an internal heating chamber, a plurality of internal partitions on the inner wall of the furnace shell dividing the heating chamber into an inner heating zone and a plurality of outer heating zones connected to the inner heating zone; a plurality of aluminum ingots to be heated are arranged symmetrically in a ring in the inner heating zone; a plurality of mounting holes communicating with the outer heating zones are provided on the outer wall of the furnace shell, and burners are installed in the mounting holes; a flue gas outlet is provided at the top center of the furnace shell.

[0008] This invention arranges multiple aluminum ingots to be heated in a ring-shaped, rotationally symmetrical manner in the inner heating zone. Hot fluid is output from the burner on the side wall into the outer heating zone. The hot fluid in the multiple outer heating zones flows together into the inner heating zone, thereby ensuring that different aluminum ingots receive the same heating effect under the same fuel quantity and heating time, improving the temperature uniformity of the aluminum ingot surface, and improving the overall heating quality of all aluminum ingots.

[0009] Furthermore, the furnace shell includes a top plate and a bottom plate, which are connected by a furnace wall; the furnace wall includes multiple sub-furnace walls, which are connected in a ring to form the furnace wall.

[0010] Furthermore, an internal partition is provided on the inner side of one end of the furnace wall of each heating furnace, and the top and bottom ends of the internal partition are connected to the top plate and the bottom plate respectively; the internal partition and the inner wall of the adjacent heating furnace wall form an external heating zone.

[0011] Furthermore, each heating furnace wall has an inclined mounting hole on one end of its outer side, which is connected to the external heating zone.

[0012] Furthermore, a fan assembly is provided at the center of the upper surface of the base plate; the fan assembly includes a fan motor located at the center of the upper surface of the base plate, a fan disc is provided on the output shaft of the fan motor, and several fan blades are obliquely arranged on the side wall of the fan disc.

[0013] Furthermore, multiple aluminum ingots are placed in a ring shape inside the annular heating chamber via a trailer.

[0014] Furthermore, the trailer includes a support frame disposed on the upper surface of the base plate, a plurality of support brackets disposed on the upper surface of the support frame, a support groove disposed at the top of the support brackets, and the aluminum ingots are embedded in the support grooves of the plurality of support brackets.

[0015] This utility model discloses an aluminum ingot heating furnace, the beneficial effects of which are:

[0016] 1. This utility model arranges multiple aluminum ingots to be heated in a ring-shaped, rotationally symmetrical manner in the inner heating zone. The heat fluid is output from the burner on the side wall into the outer heating zone. The heat fluid in the multiple outer heating zones flows together into the inner heating zone, thereby ensuring that different aluminum ingots receive the same heating effect under the same fuel quantity and heating time, improving the temperature uniformity of the aluminum ingot surface, and improving the overall heating quality of all aluminum ingots.

[0017] 2. This utility model promotes the circulation of hot fluid between the inner and outer heating zones through the fan assembly. At the same time, it generates swirling flow in the horizontal direction, which enhances convective heat transfer and helps to improve the uniformity of the temperature distribution on the surface of aluminum ingots. It also makes the airflow in the furnace more stable and regular.

[0018] 3. In this utility model, the walls of multiple heating furnace chambers are distributed in a rotationally symmetrical manner and connected in a ring to form the heating furnace chamber walls. This conforms to the airflow swirling motion trend caused by the fan inside the furnace. The more complete swirling motion can enhance convective heat transfer and is conducive to improving the uniformity of the surface temperature distribution of aluminum ingots. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an aluminum ingot heating furnace according to the present invention.

[0020] Figure 2 This is a schematic diagram of the vertical cross-section structure of an aluminum ingot heating furnace according to the present invention.

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of an aluminum ingot heating furnace according to the present invention.

[0022] Figure 4 For the present utility model Figure 3 A top-view structural diagram.

[0023] The components include: 1. Furnace shell; 11. Top plate; 12. Bottom plate; 13. Furnace wall; 14. Furnace wall; 2. Heating chamber; 21. Inner heating zone; 22. Outer heating zone; 3. Internal partition; 4. Aluminum ingot; 5. Mounting hole; 6. Burner; 7. Flue gas outlet; 8. Fan assembly; 81. Fan motor; 82. Fan turntable; 83. Fan blades; 9. Trailer; 91. Support frame; 92. Support bracket; 93. Support groove. Detailed Implementation

[0024] The present invention is described in detail with respect to specific embodiments in order to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, any changes that are within the spirit and scope of the present invention as defined and determined by the appended claims are obvious. All utility model creations utilizing the concept of the present invention are protected.

[0025] Example 1

[0026] refer to Figures 1-4 This embodiment provides an aluminum ingot heating furnace, the purpose of which is to solve the problem of uneven heating of aluminum ingots in existing aluminum ingot heating furnaces. The specific structure of this embodiment will be described in detail below.

[0027] An aluminum ingot heating furnace includes a furnace shell 1 with an internal heating chamber 2.

[0028] Specifically, the inner wall of the heating furnace shell 1 is provided with multiple internal partitions 3, which divide the heating chamber 2 into an inner heating zone 21 and multiple outer heating zones 22 connected to the inner heating zone 21; multiple aluminum ingots 4 to be heated are placed in a ring symmetrically in the inner heating zone 21; multiple mounting holes 5 connected to the outer heating zone 22 are provided on the outer wall of the heating furnace shell 1, and burners 6 are installed in the mounting holes 5; a flue gas outlet 7 is provided at the top center of the heating furnace shell 1.

[0029] In this embodiment, multiple aluminum ingots 4 to be heated are arranged in a ring-shaped symmetrical arrangement within the inner heating zone 21. The burner 6 on the side wall of the heating furnace shell 1 outputs hot fluid into the outer heating zone 22. The hot fluid in the multiple outer heating zones 22 flows together into the inner heating zone 21 to heat the multiple aluminum ingots 4. The rotationally symmetrical distribution of the aluminum ingots 4 ensures that different aluminum ingots 4 receive the same heating effect under the same fuel quantity and heating time, and improves the temperature uniformity of the surface of the aluminum ingots 4, thereby improving the overall heating quality of all aluminum ingots 4.

[0030] This device can be referenced from the heating furnace of Baowu Aluminum Industry: the fuel type is natural gas, the excess air coefficient is 1.05, and the fuel consumption is 33 Nm³ per ton of aluminum. 3 The fuel is a natural gas type F23-A burner, model 6.

[0031] Specifically, the furnace shell 1 includes a top plate 11 and a bottom plate 12, which are connected by a furnace wall 13. The furnace wall 13 includes a plurality of furnace walls 14, which are connected in a ring to form the furnace wall 13.

[0032] In this embodiment, the number of furnace walls 14 is the same as the number of aluminum ingots 4. Multiple furnace walls 14 are distributed in a rotationally symmetrical manner and connected in a ring to form furnace walls 13, which conforms to the airflow swirling motion trend of hot air in the furnace. The more complete swirling motion can enhance convective heat transfer and is conducive to improving the uniformity of surface temperature distribution of aluminum ingots 4.

[0033] Specifically, an internal partition 3 is provided on the inner side of one end of each heating furnace wall 14, and the top and bottom ends of the internal partition 3 are connected to the top plate 11 and the bottom plate 12 respectively; the internal partition 3 and the inner wall of the adjacent heating furnace wall 14 form an outer heating zone 22.

[0034] Each heating furnace wall 14 has an inclined mounting hole 5 on one end of its outer side, which is connected to the external heating zone 22.

[0035] In this embodiment, the internal partition 3 is an arc-shaped plate that fits into the furnace wall 14. The internal partition 3 divides the heating chamber 2 into an inner heating zone 21 and an outer heating zone 22. The burner 6 injects fuel into the outer heating zone 22 and combustion occurs. The internal partition 3 blocks some of the radiant heat energy. The temperature of the hot fluid decreases as it moves into the inner heating zone 21, which contains the aluminum ingot 4, so that the temperature inside the furnace is lower than the melting point of the aluminum ingot 4.

[0036] Optionally, nine small holes with a diameter of 60mm are set on the internal partition 3 near the burner 6 in a 3*3 pattern. Through the small holes, part of the hot fluid ejected by the burner 6 on the adjacent heating furnace wall 14 can be mixed with the airflow ejected by the burner 6 on the heating furnace wall 14, which can preheat the air and fuel and help the combustion reaction to occur.

[0037] Specifically, a fan assembly 8 is provided at the center of the upper surface of the base plate 12; the fan assembly 8 includes a fan motor 81 provided at the center of the upper surface of the base plate 12, a fan turntable 82 is provided on the output shaft of the fan motor 81, and a number of fan blades 83 are obliquely provided on the side wall of the fan turntable 82.

[0038] In this embodiment, the fan motor 81 drives the fan turntable 82 to rotate the fan blades 83. On the one hand, this promotes the airflow circulation of the hot fluid between the inner heating zone 21 and multiple outer heating zones 22. On the other hand, it generates swirling flow in the horizontal direction, which enhances convective heat transfer and helps to improve the uniformity of the surface temperature distribution of the aluminum ingot 4. At the same time, it makes the airflow in the furnace more stable and regular.

[0039] Specifically, multiple aluminum ingots 4 are placed in a ring shape inside the annular heating chamber 2 via a trailer 9.

[0040] The trailer 9 includes a support frame 91 disposed on the upper surface of the base plate 12. Multiple support frames 92 are disposed on the upper surface of the support frame 91. Support grooves 93 are disposed at the top of the support frames 92. The aluminum ingot 4 is embedded in the support grooves 93 of the multiple support frames 92.

[0041] In this embodiment, the trailer 9 includes a support frame 91. The support frame is disposed on the upper surface of the base plate 12 located in the inner heating zone 21. Multiple support frames 91 can be disposed on the upper surface of the support frame 91 to increase the height of the aluminum ingot 4. A support groove 93 is provided at the top of the support frame 91 so that the aluminum ingot 4 can be placed into the support groove 93 for support and fixation.

[0042] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. An aluminum ingot heating furnace, characterized in that: The furnace shell (1) includes a heating chamber (2) inside; The inner wall of the heating furnace shell (1) is provided with multiple internal partitions (3), which divide the heating chamber (2) into an inner heating zone (21) and multiple outer heating zones (22) connected to the inner heating zone (21); multiple aluminum ingots (4) to be heated are placed in a ring symmetrically in the inner heating zone (21). The outer wall of the heating furnace shell (1) is provided with a plurality of mounting holes (5) communicating with the external heating zone (22), and a burner (6) is installed in the mounting holes (5); a flue gas outlet (7) is provided at the top center of the heating furnace shell (1).

2. The aluminum ingot heating furnace according to claim 1, characterized in that: The heating furnace shell (1) includes a top plate (11) and a bottom plate (12), which are connected by a heating furnace wall (13); the heating furnace wall (13) includes a plurality of heating furnace sub-walls (14), which are connected in a ring to form the heating furnace wall (13).

3. The aluminum ingot heating furnace according to claim 2, characterized in that: An internal partition (3) is provided on the inner side of one end of each of the heating furnace walls (14), and the top and bottom ends of the internal partition (3) are connected to the top plate (11) and the bottom plate (12) respectively. The internal partition (3) and the inner wall of the adjacent furnace chamber wall (14) form an outer heating zone (22).

4. The aluminum ingot heating furnace according to claim 3, characterized in that: Each of the heating furnace walls (14) has an inclined mounting hole (5) on one end of its outer side, and the mounting hole (5) is connected to the outer heating zone (22).

5. The aluminum ingot heating furnace according to claim 2, characterized in that: A fan assembly (8) is provided at the center of the upper surface of the base plate (12); the fan assembly (8) includes a fan motor (81) provided at the center of the upper surface of the base plate (12), a fan turntable (82) is provided on the output shaft of the fan motor (81), and a plurality of fan blades (83) are obliquely provided on the side wall of the fan turntable (82).

6. The aluminum ingot heating furnace according to claim 5, characterized in that: Multiple aluminum ingots (4) are placed in a ring shape in the annular heating chamber (2) by a trailer (9).

7. The aluminum ingot heating furnace according to claim 6, characterized in that: The trailer (9) includes a support frame (91) disposed on the upper surface of the base plate (12). The upper surface of the support frame (91) is provided with multiple support frames (92). The top of the support frame (92) is provided with a support groove (93). The aluminum ingot (4) is embedded in the support groove (93) of the multiple support frames (92).

Images