Automatic slag removal device for smelting furnace

Abstract

The present invention relates to the field of metal smelting preparation, and specifically to an automatic slag removal device for a smelting furnace, comprising a liquid storage tank, a first discharge channel, a slag removal furnace, a stirring mechanism, a second discharge channel and a third discharge channel; a stirring mechanism is arranged on the slag removal furnace, the stirring mechanism comprises a first stirring member, a second stirring member, a first carrier and a gearbox, the first stirring member comprises a first stirring shaft and a first stirring blade, the second stirring member comprises a second stirring shaft and a second stirring blade, and the second stirring shaft is rotatably connected to the first carrier; a side wall opening is arranged at the upper part of the slag removal furnace, the feed end of the third discharge channel is connected to the bottom of the slag removal furnace, and the feed end of the second discharge channel is connected to the upper part of the slag removal furnace through the side wall opening; in the vertical direction, the upper part of the second stirring blade is not lower than the lowest point of the side wall opening, and the lower part of the second stirring blade is not higher than the lowest point of the side wall opening. Continuous automatic refining and slag removal is realized, labor intensity is reduced, and operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of metal smelting preparation, and in particular to the field of structural technology of an automatic slag removal device for a smelting furnace. Background Art

[0002] In the aluminum alloy smelting process, after the aluminum ingots and aluminum ore are melted into liquid at high temperature, the molten liquid also needs to be refined, degassed, impurities and slag removed.

[0003] At present, most slag removal operations are carried out through degassing and refining slag removal in a single furnace, and finally the slag removal operation is performed manually. Although this can reduce burn-in loss, it has certain limitations on the continuous and high-yield operation efficiency of aluminum alloy processing; and often single-furnace degassing and refining slag removal require the cooperation of multiple people, resulting in an increase in labor costs. Summary of the invention

[0004] The object of the present invention is to provide an automatic slag removal device for a smelting furnace, which uses centrifugal blades to collect and discharge the floating slag ash, and can realize continuous automatic refining and slag removal without excessive human intervention, thereby reducing labor intensity and improving operating efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The automatic slag removal device of the smelting furnace comprises a liquid storage tank, a first discharge channel, a slag removal furnace, a stirring mechanism, a second discharge channel and a third discharge channel; the feed end of the first discharge channel is connected to the discharge end of the liquid storage tank, and the discharge end of the first discharge channel is connected to the feed end of the slag removal furnace; a stirring mechanism is arranged on the slag removal furnace, and the stirring mechanism comprises a first stirring member, a second stirring member, a first supporting frame and a gearbox, the first stirring member comprises a first stirring shaft and a first stirring blade, the second stirring member comprises a second stirring shaft and a second stirring blade, the second stirring shaft is rotatably connected to the first supporting frame, a second stirring blade is arranged on the outer side wall of the bottom of the second stirring shaft, and the first stirring member comprises a second stirring shaft and a second stirring blade. The stirring shaft passes through the second stirring shaft and is rotatably connected thereto, and the first stirring shaft and the second stirring shaft are coaxially arranged, and a first stirring blade is arranged at the bottom of the first stirring shaft; a gearbox is arranged on the first supporting frame, and the gearbox is transmission-connected to the second stirring shaft; the distal end of the second stirring blade is close to the inner wall of the slag removal furnace; a side wall opening is arranged at the upper part of the slag removal furnace, a feed end of the third discharge channel is connected to the bottom of the slag removal furnace, and a feed end of the second discharge channel is connected to the upper part of the slag removal furnace through the side wall opening; in the vertical direction, the upper part of the second stirring blade is not lower than the lowest point of the side wall opening, and the lower part of the second stirring blade is not higher than the lowest point of the side wall opening.

[0007] Furthermore, a slope surface is provided inside one end of the second discharge channel close to the slag removal furnace, and the height of the slope surface gradually increases in a direction away from the inside of the slag removal furnace.

[0008] Furthermore, the second stirring blade includes a centrifugal blade and a concave plate. A plurality of centrifugal blades are symmetrically arranged on the outer side wall of the second stirring shaft. The concave plate is arranged on the upper part of the centrifugal blade, and the concave surface of the concave plate is arranged along the rotation direction of the centrifugal blade.

[0009] Furthermore, the upper portion of the concave plate is higher than the height of the slope surface.

[0010] Furthermore, a combustion flame nozzle is arranged above the slope surface.

[0011] Furthermore, a grate plate is provided at the place where the third discharge channel is connected to the slag removal furnace.

[0012] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0013] 1. Use centrifugal blades to collect and discharge the floating slag ash, and can achieve continuous and automatic refining and slag removal without excessive human intervention, reducing labor intensity and improving work efficiency.

[0014] 2. Setting up a slope surface reduces the loss of aluminum liquid.

[0015] 3. The concave plate is set to improve the slag removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of another viewing angle of the present invention.

[0018] Figure 3 It is a structural schematic diagram of an embodiment of the second stirring member in the present invention.

[0019] Figure 4 This is a schematic structural diagram of the second stirring member and the side wall opening in the present invention from another perspective.

[0020] In the figure: 1-liquid storage tank; 21-first discharge channel; 22-second discharge channel; 23-third discharge channel; 3-slag removal furnace; 31-side wall opening; 32-grate plate; 4-stirring mechanism; 41-first stirring member; 411-first stirring shaft; 412-first stirring blade; 42-second stirring member; 421-second stirring shaft; 422-second stirring blade; 4221-centrifugal blade; 43-first supporting frame; 44-gearbox; 4222-concave plate; 100-aluminum solution. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Embodiment 1:

[0023] like Figure 1-Figure 4 As shown, the automatic slag removal device of the smelting furnace includes a liquid storage tank 1, a first discharge channel 21, a slag removal furnace 3, a stirring mechanism 4, a second discharge channel 22 and a third discharge channel 23; the feed end of the first discharge channel 21 is connected to the discharge end of the liquid storage tank 1, and the discharge end of the first discharge channel 21 is connected to the feed end of the slag removal furnace 3; a stirring mechanism 4 is arranged on the slag removal furnace 3, and the stirring mechanism 4 includes a first stirring member 41, a second stirring member 42, a first carrier frame 43 and a gearbox 44, the first stirring member 41 includes a first stirring shaft 411 and a first stirring blade 412, the second stirring member 42 includes a second stirring shaft 421 and a second stirring blade 422, the second stirring shaft 421 is rotatably connected to the first carrier frame 43, and a second stirring blade 422 is arranged on the outer side wall of the bottom of the second stirring shaft 421, The first stirring shaft 411 passes through the second stirring shaft 421 and is rotatably connected thereto, and the first stirring shaft 411 and the second stirring shaft 421 are coaxially arranged, and a first stirring blade 412 is arranged at the bottom of the first stirring shaft 411; a gearbox 44 is arranged on the first supporting frame 43, and the gearbox 44 is transmission-connected to the second stirring shaft 421; the far end of the second stirring blade 422 is close to the inner wall of the slag removal furnace 3; a side wall opening 31 is arranged at the upper part of the slag removal furnace 3, and the feed end of the third discharge channel 23 is connected to the bottom of the slag removal furnace 3, and the feed end of the second discharge channel 22 is connected to the upper part of the slag removal furnace 3 through the side wall opening 31; in the vertical direction, the upper part of the second stirring blade 422 is not lower than the lowest point of the side wall opening 31, and the lower part of the second stirring blade 422 is not higher than the lowest point of the side wall opening 31.

[0024] During operation, a suitable amount of liquid is stored in the liquid storage tank 1, and the first discharge channel 21 is used to continuously feed the slag removal furnace 3; and the refining agent / slag removal agent is continuously added to the slag removal furnace 3, and the driving motor drives the gearbox 44 to work, and the gearbox 44 drives the first stirring shaft 411 to rotate rapidly and the second stirring shaft 421 to rotate slowly (or two gearboxes are set to transmit respectively to achieve differential rotation), and the first stirring shaft 411 and the first stirring blade 412 rotate rapidly to quickly stir the molten metal in the slag removal furnace 3, thereby improving the refining / slag removal effect; the slag ash formed will float to the surface of the aluminum liquid through buoyancy; the second stirring shaft 4 21 and the second stirring blade 422 rotate slowly, and the slag on the surface of the aluminum liquid is beaten to the outside (near the inner wall of the slag removal furnace 3), and through the continuous prying of the second stirring blade 422, as much slag as possible is beaten into the second discharge channel 22 through the side wall opening 31 and discharged, thereby realizing continuous slag removal operation; preferably, in order to ensure that the slag can be discharged in time, the aluminum liquid in the slag removal furnace 3 needs to maintain a certain liquid level as much as possible, and the discharge amount can be adjusted by setting a gate at the third discharge channel 23, and the feed amount of the slag removal furnace 3 can be adjusted to control it, so that the molten liquid level in the slag removal furnace 3 remains basically unchanged, so as to improve the efficiency and effect of the continuous slag removal operation.

[0025] Preferably, the first stirring shaft 411 is a hollow rotating shaft and is provided with a degassing channel (the aluminum alloy melt degassing stirring shaft is a prior art and will not be described in detail here) for degassing the melt in the slag removal furnace 3, saving processing steps and improving operating efficiency.

[0026] Preferably, when the lower part of the second stirring blade 422 is not higher than the lowest point of the side wall opening 31, the bottom part of the second stirring blade 422 is immersed in the aluminum melt, and when rotating, the slag removal effect can be improved, but the protective film on the surface of the aluminum melt will be damaged, resulting in increased burning loss; another implementation method is: the lower part of the second stirring blade 422 is higher than the lowest point of the side wall opening 31, at this time, the bottom of the second stirring blade 422 can reduce the contact with the surface of the aluminum melt as much as possible, and contact the slag (the height of the slag is higher than the height of the aluminum melt surface by a certain distance), so that the second stirring blade 422 reduces the damage to the protective film on the surface of the aluminum melt, but it will cause a decrease in the slag removal efficiency, and the slag cannot be discharged in time and efficiently. Therefore, one of the two methods can be selected as the implementation plan of this patent application according to the operating efficiency and the subsequent aluminum ash treatment process.

[0027] Preferably, the present patent application aims to solve the problem of efficiency in refining, degassing and deslagging of aluminum alloy melt in the continuous production process. Therefore, it is necessary to ensure that there is sufficient material in the liquid storage tank 1, and the problem of increased burning loss caused by using stirring blades to remove slag can be solved by arranging an "aluminum ash treatment" for the collected slag ash and then recycling it.

[0028] Embodiment 2:

[0029] like Figure 1-Figure 4 As shown, with respect to the above embodiments, this embodiment optimizes the structure of the second discharge channel.

[0030] In the automatic slag removal device of the smelting furnace, a slope surface 221 is provided inside the end of the second discharge channel 22 close to the slag removal furnace 3, and the height of the slope surface 221 gradually increases in the direction away from the inside of the slag removal furnace 3. By providing the slope surface 221, when the slag carries the molten aluminum into the slope surface 221, due to the inclination angle of the slope surface, the molten aluminum will flow back into the slag removal furnace 3, reducing the consumption of aluminum during the slag removal process, and greatly saving costs (in the continuous operation process, the temperature of the inner wall and the side wall opening 31 of the slag removal furnace are relatively high, providing a high temperature environment support for the reflux of the molten aluminum).

[0031] Embodiment 3:

[0032] like Figure 1-Figure 4 As shown, with respect to the above embodiment, this embodiment optimizes the structure of the second stirring blade.

[0033] In the automatic slag removal device of the smelting furnace, the second stirring blade 422 includes a centrifugal blade 4221 and a concave plate 4222. A plurality of centrifugal blades 4221 are symmetrically arranged on the outer wall of the second stirring shaft 421. The concave plate 4222 is arranged on the upper part of the centrifugal blade 4221, and the concave surface of the concave plate 54 is arranged along the rotation direction of the centrifugal blade 4221. The centrifugal blade 4221 is conducive to hitting the slag to the inner wall of the slag removal furnace 3 by the centrifugal force generated by the rotation. The concave plate 4222 is arranged to increase the amount of slag "collected" by the second stirring blade 422 during the rotation process, and can reduce the excessive slag from the top of the centrifugal blade 4221, thereby improving the slag removal effect.

[0034] Embodiment 4:

[0035] like Figure 1-Figure 4 As shown, with respect to the above embodiment, this embodiment optimizes the structure of the second stirring blade.

[0036] The upper part of the concave plate 4222 in the automatic slag removal device of the smelting furnace is higher than the height of the slope surface 221. The height of the concave plate 4222 is higher than the height of the slope surface 221, so that the aluminum slag is squeezed through the slope surface 221 to complete the discharge operation.

[0037] Preferably, along the rotation direction of the second stirring shaft 421, the side wall opening 31 is inclined upward. The inclined side wall opening 31 can increase the "contact" time of the second stirring blade 422 with the side wall opening during rotation, that is, increase the amount of aluminum slag driven into the side wall opening 31 at a single time, thereby improving the slag removal efficiency.

[0038] Embodiment 5:

[0039] like Figure 1-Figure 4 As shown, for the above embodiments, this embodiment optimizes the aluminum liquid recovery structure.

[0040] In the automatic slag removal device of the smelting furnace, a combustion nozzle 6 is arranged above the slope surface 221. The combustion nozzle 6 is connected to natural gas and performs jet combustion above the slope surface 221, which can heat the aluminum liquid carried in the aluminum slag and increase the reflux recovery amount of the aluminum liquid.

[0041] Embodiment 6:

[0042] like Figure 1-Figure 4 As shown, for the above embodiments, this embodiment optimizes the filtering structure.

[0043] In the automatic slag removal device for the smelting furnace, a grate plate 32 is arranged at the connection between the third discharge channel 23 and the slag removal furnace 3. The grate plate 32 is arranged to reduce the pressure of aluminum slag formed by the swirl flow entering the third discharge channel 23, thereby affecting the slag removal effect.

[0044] Preferably, the discharge amount of the slag removal furnace 3 can also be adjusted by setting the passing amount of the grate plate 32 .

[0045] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. Automatic slag removal device for smelting furnace, characterized by: The invention comprises a liquid storage tank (1), a first discharge channel (21), a slag removal furnace (3), a stirring mechanism (4), a second discharge channel (22) and a third discharge channel (23); the feed end of the first discharge channel (21) is connected to the discharge end of the liquid storage tank (1), and the discharge end of the first discharge channel (21) is connected to the feed end of the slag removal furnace (3); a stirring mechanism (4) is arranged on the slag removal furnace (3), the stirring mechanism (4) comprises a first stirring member (41), a second stirring member (42), a first carrier frame (43) and a gearbox (44); the first stirring member (41) comprises a first stirring shaft (411) and a first stirring blade (412); the second stirring member (42) comprises a second stirring shaft (421) and a second stirring blade (422); the second stirring shaft (421) is rotatably connected to the first carrier frame (43); the second stirring blade (422) is arranged on the outer side wall of the bottom of the second stirring shaft (421 ... member (411) and a first stirring The stirring shaft (411) passes through the second stirring shaft (421) and is rotatably connected thereto, and the first stirring shaft (411) and the second stirring shaft (421) are coaxially arranged, and a first stirring blade (412) is arranged at the bottom of the first stirring shaft (411); a gearbox (44) is arranged on the first supporting frame (43), and the gearbox (44) is transmission-connected to the second stirring shaft (421); the far end of the second stirring blade (422) is close to the inner wall of the deslagging furnace (3); a side wall opening (31) is arranged at the upper part of the deslagging furnace (3), the feed end of the third discharge channel (23) is connected to the bottom of the deslagging furnace (3), and the feed end of the second discharge channel (22) is connected to the upper part of the deslagging furnace (3) through the side wall opening (31); in the vertical direction, the upper part of the second stirring blade (422) is not lower than the lowest point of the side wall opening (31), and the lower part of the second stirring blade (422) is not higher than the lowest point of the side wall opening (31); A slope surface (221) is provided inside one end of the second discharge channel (22) close to the slag removal furnace (3), and the height of the slope surface (221) gradually increases in a direction away from the inside of the slag removal furnace (3). A combustion nozzle (6) is provided above the slope surface (221).

2. The automatic slag removal device for a smelting furnace according to claim 1, characterized in that: The second stirring blade (422) comprises a centrifugal blade (4221) and a concave plate (4222); a plurality of centrifugal blades (4221) are symmetrically arranged on the outer side wall of the second stirring shaft (421); a concave plate (4222) is arranged on the upper part of the centrifugal blade (4221); and a concave surface of the concave plate (4222) is arranged along the rotation direction of the centrifugal blade (4221).

3. The automatic slag removal device for a smelting furnace according to claim 2, characterized in that: The upper portion of the concave plate (4222) is higher than the height of the slope surface (221).

4. The automatic slag removal device for a smelting furnace according to claim 1, characterized in that: A grate plate (32) is provided at the point where the third discharge channel (23) is connected to the slag removal furnace (3).

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