Annular aluminum ingot heating furnace

Abstract

The utility model discloses an annular aluminum ingot heating furnace which comprises a heating furnace shell internally provided with an annular heating cavity, the annular heating cavity is divided into an inner heating area and an outer heating area through an inner partition plate in the annular heating cavity, a plurality of aluminum ingots to be heated are annularly and symmetrically placed in the outer heating area, and the inner heating area is communicated with the outer heating area. A plurality of mounting holes for mounting combustors are uniformly formed in the top of the heating furnace shell in the inner heating area, and a plurality of flue gas outlets are formed in the top of the heating furnace shell in the outer heating area; a plurality of aluminum ingots to be heated are annularly and symmetrically placed in the annular heating cavity in the heating furnace shell, and the aluminum ingots are rotationally and symmetrically distributed, so that different aluminum ingots are enabled to obtain the same heating effect under the same fuel quantity and heating time, the temperature uniformity of the surfaces of the aluminum ingots is improved, and the heating efficiency is improved. And the heating quality of all aluminum ingots is integrally improved.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, specifically to a ring-shaped 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 a ring-shaped aluminum ingot heating furnace, which 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 ring-shaped aluminum ingot heating furnace is provided, comprising a furnace shell with an internal ring-shaped heating chamber. The ring-shaped heating chamber is divided into an inner heating zone and an outer heating zone in which multiple aluminum ingots to be heated are placed symmetrically in a ring by an internal partition. The inner heating zone and the outer heating zone are connected. Multiple mounting holes for mounting burners are uniformly opened on the top of the furnace shell located in the inner heating zone, and multiple flue gas outlets are opened on the top of the furnace shell located in the outer heating zone.

[0008] This invention places multiple aluminum ingots to be heated in a ring-shaped symmetrical arrangement within the annular heating chamber inside the furnace shell. The rotational symmetry of the aluminum ingots ensures that different aluminum ingots receive the same heating effect under the same fuel quantity and heating time, and improves the temperature uniformity of the aluminum ingot surface, thereby enhancing the overall heating quality of all aluminum ingots.

[0009] Furthermore, a fan mounting cavity is provided at the bottom center of the heating furnace shell, and a fan assembly that acts on the inner heating zone is provided inside the fan mounting cavity.

[0010] Furthermore, the fan assembly includes a fan motor located at the center of the bottom of the fan mounting cavity, a fan disc being mounted on the output shaft of the fan motor, and several fan blades being obliquely mounted on the side wall of the fan disc, with the fan blades located below the inner heating zone.

[0011] Furthermore, an annular baffle plate is fixed to the bottom of the fan mounting cavity below the fan turntable.

[0012] Furthermore, the sidewall of the internal partition is connected to the inner wall of the annular heating cavity via a first connecting rod; the bottom end of the internal partition is connected to the bottom of the annular heating cavity via a second connecting rod.

[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 located at the bottom of the annular heating chamber, with multiple support brackets on the upper surface of the support frame and support grooves at the top of the support brackets, and the aluminum ingots are embedded in the support grooves of the multiple support brackets.

[0015] This utility model discloses a ring-shaped aluminum ingot heating furnace, which has the following advantages:

[0016] 1. In this invention, multiple aluminum ingots to be heated are placed symmetrically in a ring inside the annular heating chamber of the heating furnace shell. The rotational symmetry of the aluminum ingots ensures that different aluminum ingots receive the same heating effect under the same fuel quantity and heating time, and improves the temperature uniformity of the aluminum ingot surface, thereby improving the overall heating quality of all aluminum ingots.

[0017] 2. In this utility model, a fan mounting cavity is provided in the center of the heating furnace shell, and a fan assembly is provided in the fan mounting cavity. The fan assembly promotes the circulation of hot fluid between the inner heating zone and the outer heating zone. At the same time, a swirling flow is generated in the horizontal direction, which enhances convective heat transfer and helps to improve the uniformity of the surface temperature distribution of aluminum ingots. It also makes the airflow in the furnace more stable and regular. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a ring-shaped aluminum ingot heating furnace according to the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of a ring-shaped aluminum ingot heating furnace according to the present invention.

[0020] Figure 3 This is a schematic diagram of the aluminum ingot layout structure of this utility model.

[0021] The components include: 1. Furnace shell; 2. Annular heating chamber; 21. Inner heating zone; 22. Outer heating zone; 3. Internal partition; 31. First connecting rod; 32. Second connecting rod; 4. Aluminum ingot; 5. Burner; 6. Mounting hole; 7. Flue gas outlet; 8. Fan mounting cavity; 81. Annular baffle plate; 9. Fan assembly; 91. Fan motor; 92. Fan turntable; 93. Fan blades; 10. Trailer; 101. Support frame; 102. Support bracket; 103. Support groove. Detailed Implementation

[0022] 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.

[0023] Example 1

[0024] refer to Figures 1-3 This embodiment provides a ring-shaped 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.

[0025] A ring-shaped aluminum ingot heating furnace includes a furnace shell 1 with an internal ring-shaped heating chamber 2;

[0026] The annular heating chamber 2 is divided into an inner heating zone 21 and an outer heating zone 22, which is symmetrically arranged in a ring, by an internal partition 3. The inner heating zone 21 and the outer heating zone 22 are connected.

[0027] Specifically, the top of the furnace shell 1 in the inner heating zone 21 is provided with a plurality of mounting holes 6 for mounting burners 5, and the top of the furnace shell 1 in the outer heating zone 22 is provided with a plurality of flue gas outlets 7.

[0028] In this embodiment, multiple aluminum ingots 4 to be heated are arranged symmetrically in a ring within the annular heating chamber 2, located in the outer heating zone 22 of the annular heating chamber 2. The bottom and top of the inner heating zone 21 and the outer heating zone 22 are connected. The burner 5 of the inner heating zone 21 sprays hot fluid into the inner heating zone 21. The hot fluid flows from the bottom of the inner heating zone 21 to the outer heating zone 22 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.

[0029] 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 used in the heating furnace is the F23-A type burner, which is designed for natural gas combustion.

[0030] Optionally, an annular baffle is provided at the inner outlet of the mounting hole 6. The annular baffle has multiple holes evenly distributed. When the hot fluid passing through the outer heating zone 22 enters the inner heating zone 21 from the top channel of the furnace, part of the kinetic energy is offset by the annular baffle below the burner 5, preventing the flame of the burner 5 from being blown out by the circulating airflow. The holes on the annular baffle allow the circulating flue gas to mix with the newly entered fuel, which plays a preheating role, which is beneficial to fuel combustion and reduces pollutant emissions.

[0031] Specifically, a fan mounting cavity 8 is provided at the bottom center of the heating furnace shell 1, and a fan assembly 9 that acts on the inner heating zone 21 is provided inside the fan mounting cavity 8.

[0032] Specifically, the fan assembly 9 includes a fan motor 91 located at the center of the bottom of the fan mounting cavity 8. A fan disc 92 is mounted on the output shaft of the fan motor 91. Several fan blades 93 are obliquely mounted on the side wall of the fan disc 92, and the fan blades 93 are located below the inner heating zone 21.

[0033] In this embodiment, the fan motor 91 drives the fan turntable 92 to rotate the fan blades 93. On the one hand, this promotes the airflow circulation of the hot fluid between the inner heating zone 21 and the outer heating zone 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.

[0034] Specifically, an annular baffle plate 81 is fixed to the bottom of the fan mounting cavity 8 below the fan turntable 92.

[0035] In this embodiment, the annular baffle plate 81 is concentric with the fan disc 92. Preferably, the diameter of the annular baffle plate 81 is the same as the diameter of the fan disc 92, so that the hot fluid sinking in the inner heating zone 21 can be guided by the annular baffle plate 81 and flow to the outer heating zone 22.

[0036] Specifically, the side wall of the internal partition 3 is connected to the inner wall of the annular heating cavity 2 via the first connecting rod 31; the bottom end of the internal partition 3 is connected to the bottom of the annular heating cavity 2 via the second connecting rod 32.

[0037] In this embodiment, the number of the first connecting rod 31 and the second connecting rod 32 can be newly set according to actual needs. The first connecting rod 31 connects the inner partition 3 to the inner wall of the annular heating cavity 2, while the second connecting rod 32 supports the inner partition 3. Thus, the first connecting rod 31 and the second connecting rod 32 fix the inner partition 3 in the annular heating cavity 2, so as to divide the annular heating cavity 2 into an inner heating area 21 and an outer heating area 22.

[0038] Specifically, multiple aluminum ingots 4 are placed in a ring shape inside the annular heating chamber 2 via a trailer 10.

[0039] The trailer 10 includes a support frame 101 disposed at the bottom of the annular heating chamber 2. Multiple support frames 102 are disposed on the upper surface of the support frame 101. A support groove 103 is disposed at the top of the support frame 102. The aluminum ingot 4 is embedded in the support groove 103 of the multiple support frames 102.

[0040] In this embodiment, six aluminum ingots 4 can be arranged at a time, and the six aluminum ingots 4 are set in the outer heating zone 22 inside the annular heating chamber 2 by six trailers 10.

[0041] The trailer 10 includes a support frame 101. The support frame is located at the bottom of the annular heating cavity 2 in the external heating zone 22. Multiple support frames 101 can be provided on the upper surface of the support frame 101 to increase the height of the aluminum ingot 4. A support groove 103 is provided at the top of the support frame 101 so that the aluminum ingot 4 can be placed into the support groove 103 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. A ring-shaped aluminum ingot heating furnace, characterized in that: The furnace shell (1) includes an internal annular heating chamber (2); The annular heating cavity (2) is divided into an inner heating zone (21) and an outer heating zone (22) where multiple aluminum ingots (4) to be heated are placed in a ring symmetrically by an internal partition (3). The inner heating zone (21) and the outer heating zone (22) are connected. The top of the furnace shell (1) located in the inner heating zone (21) is provided with a plurality of mounting holes (6) for mounting burners (5), and the top of the furnace shell (1) located in the outer heating zone (22) is provided with a plurality of flue gas outlets (7).

2. The annular aluminum ingot heating furnace according to claim 1, characterized in that: The heating furnace shell (1) has a fan mounting cavity (8) at its center bottom, and a fan assembly (9) that acts on the inner heating zone (21) is provided in the fan mounting cavity (8).

3. The annular aluminum ingot heating furnace according to claim 2, characterized in that: The fan assembly (9) includes a fan motor (91) located at the center of the bottom of the fan mounting cavity (8). A fan turntable (92) is provided on the output shaft of the fan motor (91). Several fan blades (93) are obliquely arranged on the side wall of the fan turntable (92). The fan blades (93) are located below the inner heating zone (21).

4. The annular aluminum ingot heating furnace according to claim 3, characterized in that: Below the fan turntable (92), there is an annular baffle plate (81) fixed to the bottom of the fan mounting cavity (8).

5. The annular aluminum ingot heating furnace according to claim 1, characterized in that: The side wall of the internal partition (3) is connected to the inner wall of the annular heating cavity (2) via the first connecting rod (31); the bottom end of the internal partition (3) is connected to the bottom of the annular heating cavity (2) via the second connecting rod (32).

6. The annular aluminum ingot heating furnace according to claim 1, characterized in that: Multiple aluminum ingots (4) are placed in a ring shape in the annular heating chamber (2) by a trailer (10).

7. The annular aluminum ingot heating furnace according to claim 6, characterized in that: The trailer (10) includes a support frame (101) disposed at the bottom of the annular heating chamber (2). Multiple support frames (102) are disposed on the upper surface of the support frame (101). A support groove (103) is disposed at the top of the support frame (102). The aluminum ingot (4) is embedded in the support groove (103) of the multiple support frames (102).

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