Variable-power heating device of reduction furnace

Abstract

The utility model discloses a variable power heating device of a reduction furnace, which comprises two alundum tubes arranged side by side, a furnace wire A and a furnace wire B with the same trend are wound on the two alundum tubes, a moving gap is arranged between the furnace wire A and the furnace wire B, and the furnace wire A and the furnace wire B move mutually under the action of external force to be closed and separated to form a single-strand or double-strand furnace wire. Each of the furnace wire A and the furnace wire B is composed of a long straight section, a spiral section and a connecting section, the bottom end of the spiral section is connected with the long straight section, the top end of the spiral section is connected with the connecting section, the opposite outer sides of the furnace wire A and the furnace wire B are respectively provided with an arc-shaped part, and the opposite inner sides of the furnace wire A and the furnace wire B are respectively provided with a connecting part. According to the heating device provided by the utility model, the heating power can be changed without disassembling and assembling the furnace wire, the multiple increase and decrease of the heating power of the furnace wire are realized through a simple installation and arrangement mode, the step of power-off installation and replacement is omitted, and the limitation that the heating power change is realized by changing the voltage, the current and the frequency conventionally is overcome.

Description

Technical Field

[0001] The utility model relates to a heating device, in particular to a variable power heating device for a reduction furnace, belonging to the technical field of reduction furnace heating. Background Art

[0002] The reduction furnace is used in the secondary reduction production process of reduced iron powder and atomized iron powder. This process is the key process in the production of reduced iron powder and atomized iron powder. After being processed in this process, the carbon, oxygen and sulfur content of the iron powder is further reduced, and the iron content is relatively increased. At the same time, the work hardening of the iron powder produced in the previous process is eliminated. The quality control of this process directly determines the final chemical composition, physical and process properties of the iron powder.

[0003] The reduction furnace heating device needs to adjust the power during use to meet the reduction needs. The existing reduction furnace heating device has the following power adjustment methods: by cutting off the power to install and replace the furnace wire of different specifications, and by conventionally changing the voltage, current and frequency to achieve the adjustment of the heating power.

[0004] The method of replacing the furnace wire by powering off is cumbersome and inefficient. However, changing the voltage, current, and frequency to adjust the heating power requires more components, is relatively complex, and has high costs, which has great limitations.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the deficiencies in the background technology, the utility model provides a variable power heating device for a reduction furnace, which can change the heating power without disassembling the furnace wire, realizes the multiple increase or decrease of the furnace wire heating power through a simple installation and arrangement method, eliminates the steps of power-off installation and replacement, and overcomes the limitations of conventional methods of achieving heating power changes by changing voltage, current and frequency.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A variable power heating device for a reduction furnace comprises two corundum tubes arranged side by side, furnace wires A and B having the same direction are wound on the two corundum tubes, a moving gap is provided between the furnace wires A and B, and the furnace wires A and B move mutually, close and separate under the action of external force to form a single or double-strand furnace wire;

[0009] Both the furnace wire A and the furnace wire B are composed of a long straight section, a spiral section and a connecting section. The bottom end of the spiral section is connected to the long straight section, and the top end of the spiral section is connected to the connecting section.

[0010] The furnace wires A and B are provided with arc portions on their outer sides facing each other, and the furnace wires A and B are provided with connecting portions on their inner sides facing each other.

[0011] Furthermore, the long straight section is arranged parallel to the corundum tube, the spiral section is wound around the corundum tube, and the connecting section is arranged perpendicular to the corundum tube.

[0012] Furthermore, a spacing is provided between the spiral section of the furnace wire A and the spiral section of the furnace wire B, and the spacing decreases in a direction from the long straight section to the connecting section.

[0013] Furthermore, the spacing is reduced from 4 mm to 3 mm.

[0014] Furthermore, the radius dimension of the arc portion is 17 mm.

[0015] Furthermore, the connection parts of the furnace wire A and the furnace wire B can be abutted and closed together to form a single strand of furnace wire.

[0016] Furthermore, the surface load of the furnace wire A and the furnace wire B is 2.29 W / cm².

[0017] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0018] The heating device provided by the utility model can change the heating power of the heating device without disassembling the furnace wire. The two furnace wires are mutually moved, closed and separated to form a single or double furnace wire, thereby changing the cross-sectional area of ​​the furnace wire to achieve the increase or decrease of the heating power under the constant pressure state. In the double-wire furnace wire state, the heating power of the heating device is also changed by turning the furnace wire on and off.

[0019] This utility model patent has the characteristics of simple structure, reliability and maintenance-free. It realizes the multiple increase and decrease of furnace wire heating power through simple installation and arrangement, eliminating the steps of power-off installation and replacement of furnace wire. It overcomes the limitation of conventional heating power change achieved by changing voltage, current and frequency.

[0020] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 yes Figure 1 A magnified view of the local structure;

[0023] Figure 3 yes Figure 1 Schematic diagram of the cross section at AA in the middle.

[0024] In the figure, 1-corundum tube, 2-furnace wire A, 3-furnace wire B, 4-long straight section, 5-spiral section, 6-connecting section, 7-arc-shaped portion, 8-connecting portion. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0026] like Figure 1-Figure 3 As shown together, the utility model provides a variable power heating device for a reduction furnace, including two corundum tubes 1 arranged side by side, on which furnace wires A2 and B3 with the same direction are wound, and a movement gap is provided between the furnace wires A2 and B3.

[0027] Under the action of external force, the furnace wire A2 and the furnace wire B3 move mutually, close and separate to form a single or double furnace wire, thereby changing the cross-sectional area of ​​the furnace wire to achieve the increase or decrease of the heating power under the constant pressure state. In the double-wire furnace wire state, the heating power of the heating device can also be controlled by turning the furnace wire on and off.

[0028] The furnace wire A2 and the furnace wire B3 are both composed of a long straight section 4, a spiral section 5 and a connecting section 6. The bottom end of the spiral section 5 is connected to the long straight section 4, and the top end of the spiral section 5 is connected to the connecting section 6.

[0029] The long straight section 4 is arranged parallel to the corundum tube 1 , the spiral section 5 is wound around the corundum tube 1 , and the connecting section 6 is arranged perpendicular to the corundum tube 1 .

[0030] There is a spacing between the spiral section 5 of the furnace wire A2 and the spiral section 5 of the furnace wire B3, and the spacing decreases from the long straight section 4 to the connecting section 6, and the spacing decreases from 4 mm to 3 mm.

[0031] The furnace wires A2 and B3 are provided with arc portions 7 on their outer sides, and the radius of the arc portions 7 is 17 mm. The furnace wires A2 and B3 are provided with connecting portions 8 on their inner sides, and the connecting portions 8 of the furnace wires A2 and B3 can be abutted and closed together to form a single strand of furnace wire.

[0032] There is a slight gap between the furnace wire A2 and the furnace wire B3 to offset the deformation caused by the movement of the furnace wires and prevent the furnace wires from being loosely closed and incompletely separated.

[0033] The surface load of the furnace wire A2 and the furnace wire B3 in the utility model is 2.29W / cm².

[0034] The specific working principle of this utility model:

[0035] The heating device provided by the utility model can change the heating power of the heating device without disassembling the furnace wire. The heating device forms a single or double furnace wire by mutually moving, closing and separating two furnace wires, thereby changing the cross-sectional area of ​​the furnace wire to achieve the increase or decrease of the heating power under the constant pressure state. In the double-wire furnace wire state, the heating power of the heating device is also changed by turning the furnace wire on and off.

[0036] The utility model patent has the characteristics of simple structure, reliability and maintenance-free. It realizes the multiple increase and decrease of the furnace wire heating power through a simple installation and arrangement method, eliminating the steps of powering off the furnace wire heating device for installation and replacement.

[0037] The utility model provides a slight gap between the double-strand furnace wires to offset the deformation caused by the furnace wire movement and prevent the furnace wires from being loosely closed and incompletely separated.

[0038] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A variable power heating device for a reduction furnace, characterized in that: The invention comprises two corundum tubes (1) arranged side by side, wherein furnace wires A (2) and furnace wires B (3) having the same direction are wound on the two corundum tubes (1), and a gap for movement is provided between the furnace wires A (2) and B (3). Under the action of an external force, the furnace wires A (2) and B (3) move mutually, close and separate to form a single-strand or double-strand furnace wire; The furnace wire A (2) and the furnace wire B (3) are both composed of a long straight section (4), a spiral section (5) and a connecting section (6), wherein the bottom end of the spiral section (5) is connected to the long straight section (4), and the top end of the spiral section (5) is connected to the connecting section (6); The furnace wire A (2) and the furnace wire B (3) are provided with arc-shaped portions (7) on their outer sides facing each other, and the furnace wire A (2) and the furnace wire B (3) are provided with connecting portions (8) on their inner sides facing each other.

2. A variable power heating device for a reduction furnace as claimed in claim 1, characterized in that: The long straight section (4) is arranged parallel to the corundum tube (1), the spiral section (5) is wound around the corundum tube (1), and the connecting section (6) is arranged perpendicular to the corundum tube (1).

3. A variable power heating device for a reduction furnace as claimed in claim 1, characterized in that: A spacing is provided between the spiral section (5) of the furnace wire A (2) and the spiral section (5) of the furnace wire B (3), and the spacing decreases in a direction from the long straight section (4) to the connecting section (6).

4. A variable power heating device for a reduction furnace as claimed in claim 3, characterized in that: The spacing is gradually reduced from 4mm to 3mm.

5. A variable power heating device for a reduction furnace as claimed in claim 1, characterized in that: The radius dimension of the arc-shaped portion (7) is 17 mm.

6. A variable power heating device for a reduction furnace as claimed in claim 1, characterized in that: The connecting parts (8) of the furnace wire A (2) and the furnace wire B (3) can be abutted and closed together to form a single strand of furnace wire.

7. A variable power heating device for a reduction furnace as claimed in claim 1, characterized in that: The surface load of the furnace wire A (2) and the furnace wire B (3) is 2.29 W / cm².

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