Heater for aluminum smelting furnace

Abstract

The utility model discloses a heater for an aluminum smelting furnace, which comprises a heating pipe, an outer cover is sleeved on the outer side of the heating pipe, a non-metal medium is filled in the outer cover between the inner surface of the outer cover and the outer surface of the heating pipe, and a plug cap is arranged between an opening of the outer cover and the heating pipe. When the heating pipe is fixed in the outer cover through the plug cap, the nonmetal medium is prevented from flowing out of the outer cover; and the end part of the heating pipe at the opening of the outer cover is connected with a thermocouple. According to the utility model, the heating efficiency and power of the heater are effectively improved, so that the smelting speed of the aluminum smelting furnace can be effectively improved after the heater is arranged in the aluminum smelting furnace, and the production efficiency is further improved; and secondly, the temperature of the heater is measured, the heater can be conveniently controlled to work within a reasonable temperature range, and the safety of the operation process is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste aluminum recovery, and specifically relates to a heater for an aluminum melting furnace. Background Art

[0002] Aluminum melting furnace is a new type of high-efficiency and energy-saving aluminum melting furnace developed according to aluminum smelting process. It can well meet the requirements of strict alloy composition, discontinuous production, large single furnace capacity and other requirements in aluminum smelting process, and achieves the effect of reducing consumption, reducing burning loss, improving product quality, reducing labor intensity, improving working conditions and improving production efficiency.

[0003] The aluminum melting furnace is heated by a heater during the aluminum smelting process to melt the aluminum into molten aluminum; however, the heating medium in the heater currently used is generally air, resulting in low heating efficiency, which leads to slow heating efficiency of the aluminum melting furnace and low smelting speed, seriously affecting production. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide a heater for an aluminum melting furnace, so as to improve the heating efficiency during the heating process of the aluminum melting furnace.

[0005] In order to achieve the above technical objectives and effects, the utility model is implemented through the following technical solutions:

[0006] A heater for an aluminum melting furnace comprises a heating tube, an outer cover is provided on the outer side of the heating tube, a non-metallic medium is filled in the outer cover between the inner surface of the outer cover and the outer surface of the heating tube, and a plug cap is provided between the outer cover opening and the heating tube, the plug cap fixes the heating tube in the outer cover while preventing the non-metallic medium from flowing out of the outer cover; the end of the heating tube located at the outer cover opening is connected to a thermocouple.

[0007] Furthermore, a flange is provided on the outer surface of the opening side of the outer cover.

[0008] Furthermore, the front end of the heating tube arranged in the outer cover is arranged in a spiral shape.

[0009] Furthermore, the heating tube is made of SiC.

[0010] Furthermore, the plug cap is tightly fitted with the outer cover and the heating tube.

[0011] Furthermore, the plug cap is made of ceramic.

[0012] Furthermore, the material of the outer cover is Si 3 N 4 .

[0013] Furthermore, the non-metallic medium is made of boron nitride, aluminum oxide or magnesium oxide.

[0014] Furthermore, the thermocouple is of K type.

[0015] The beneficial effects of the utility model are as follows: the utility model heater effectively improves the heating efficiency of the heater by arranging a silicon carbide outer cover on the outer sleeve of the silicon nitride heating tube and filling a non-metallic medium such as boron nitride, aluminum oxide or magnesium oxide between the heating tube and the outer cover, thereby ensuring that after the heater is installed in an aluminum melting furnace, the smelting speed of the aluminum melting furnace can be effectively increased, thereby improving production efficiency; secondly, the heater realizes the measurement of the heater temperature by arranging a thermocouple, which is convenient for controlling the heater to work within a reasonable temperature range and improving the safety of the operation process.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 This is a cross-sectional view of the heater of the utility model;

[0019] Figure 2 It is a cross-sectional view of the plug cap of the utility model.

[0020] Explanation of the numbers in the figure: 1. heating tube; 2. outer cover; 3. non-metallic medium; 4. plug cap; 5. thermocouple; 6. flange; 41. first connecting section; 42. second connecting section; 412. fixing hole. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like in the embodiments of the utility model is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the patent of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the patent of the present invention; in addition, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the patent of the present invention can be understood according to specific circumstances.

[0023] See also Figure 1 As shown, the utility model discloses a heater for an aluminum melting furnace, comprising a heating tube 1, wherein an outer cover 2 is sleeved on the outer side of the heating tube 1, and the outer cover 2 between the inner surface of the outer cover 2 and the outer surface of the heating tube 1 is filled with a non-metallic medium 3, and a plug cap 4 is arranged between the opening of the outer cover 2 and the heating tube 1, and the heating tube 1 is fixed in the outer cover 2 by the plug cap 4, and the non-metallic medium 3 is prevented from flowing out of the outer cover 2; the end of the heating tube 1 located at the opening of the outer cover 2 is connected to a thermocouple 5 for measuring temperature; wherein, when arranged, the outer cover 2 can have a cylindrical shape, or a square cylindrical shape, a hexagonal cylindrical shape or other polygonal cylindrical shape, and in this embodiment, the outer cover 2 is cylindrical, and the cross section of the outer cover 2 is a U-shaped tube; secondly, the outer cover 2 is a sintered body of an electrically insulating ceramic material, such as an oxide ceramic, a nitride ceramic or a carbide ceramic, and in this embodiment, the material of the outer cover 2 is Si 3 N 4 , that is, silicon nitride; in addition, in this embodiment, the material of the non-metallic medium 3 is boron nitride, aluminum oxide or magnesium oxide, and the thermocouple 5 is of K type.

[0024] Furthermore, a flange 6 is provided on the outer surface of the opening side of the outer cover 2, and the flange 6 is fixedly connected to the outer cover 2. During installation, the heater is fixed to the aluminum melting furnace through the flange 6. In the present embodiment, the flange 6 is made of Q235-A steel.

[0025] Furthermore, in the present embodiment, the front end of the heating tube 1 arranged in the outer cover 2 is arranged in a spiral shape; and the heating tube 1 adopts a ceramic heating tube, and the specific material is SiC, that is, silicon carbide. Of course, the above is only one implementation method and is not intended to limit the scope of the present application. In actual settings, other materials can also be used as long as they can meet the requirements.

[0026] For further information, see Figure 1-2 As shown, the plug cap 4 includes a first connecting section 41 and a second connecting section 42; the first connecting section 41 and the second connecting section 42 are integrally formed, and the outer diameter of the first connecting section 41 is smaller than the outer diameter of the second connecting section 42, forming a T-shape, and a fixing hole 412 is drilled between the first connecting section 41 and the second connecting section 42; when installed, the plug cap 4 is arranged between the outer cover 2 and the heating tube 1, and in this embodiment, specifically, the first connecting section 41 is inserted into the outer cover 2 from the opening of the outer cover 2, and the first connecting section 41 and the outer cover 2 are tightly fitted, and the heating tube 1 is inserted into the outer cover 2 from the fixing hole 412, and the heating tube 1 and the fixing hole 412 are also tightly fitted. At this time, the second connecting section 41 The connecting section 42 is clamped between the outer cover 2 and the heating tube 1, and the two ends of the second connecting section 42 are respectively connected to the outer cover 2 and the heating tube 1 in a conflicting manner, so that the plug cap 4 is fixed between the outer cover 2 and the heating tube 1 in a tight fit, and then the heating tube 1 is fixed in the outer cover 2 through the plug cap 4; of course, the above-mentioned connection method between the plug cap 4 and the outer cover 2 and the heating tube 1 is only one implementation method, and is not intended to limit the scope of the present application. When connecting, other methods, such as gluing, etc., can also be used, as long as the heating tube 1 can be fixed in the outer cover 2 through the plug cap 4 while preventing the non-metallic medium 3 from flowing out of the outer cover 2; secondly, in this embodiment, the plug cap 4 is preferably made of ceramic material.

[0027] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heater for an aluminum melting furnace, characterized in that: The invention comprises a heating tube (1), wherein an outer cover (2) is sleeved on the outer side of the heating tube (1), a non-metallic medium (3) is filled in the outer cover (2) between the inner surface of the outer cover (2) and the outer surface of the heating tube (1), and a plug cap (4) is arranged between the opening of the outer cover (2) and the heating tube (1), and the plug cap (4) fixes the heating tube (1) in the outer cover (2) while preventing the non-metallic medium (3) from flowing out of the outer cover (2); the end of the heating tube (1) located at the opening of the outer cover (2) is connected to a thermocouple (5).

2. The heater for an aluminum melting furnace according to claim 1, characterized in that: A flange (6) is provided on the outer surface of the opening side of the outer cover (2).

3. The heater for an aluminum melting furnace according to claim 1, characterized in that: The front end of the heating tube (1) arranged in the outer cover (2) is arranged in a spiral shape.

4. The heater for an aluminum melting furnace according to claim 3, characterized in that: The heating tube (1) is made of SiC.

5. The heater for an aluminum melting furnace according to claim 1, characterized in that: The plug cap (4) is tightly fitted with the outer cover (2) and the heating tube (1).

6. The heater for an aluminum melting furnace according to claim 5, characterized in that: The plug cap (4) is made of ceramic.

7. The heater for an aluminum melting furnace according to claim 1, characterized in that: The material of the outer cover (2) is Si3N4.

8. The heater for an aluminum melting furnace according to claim 1, characterized in that: The material of the non-metallic medium (3) is boron nitride, aluminum oxide or magnesium oxide.

9. The heater for an aluminum melting furnace according to claim 1, characterized in that: The thermocouple (5) is of K type.

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