Rotary calcining furnace

Abstract

The utility model relates to the field of calcining, and discloses a rotary calcining furnace which comprises a bottom frame, an overturning frame rotationally connected with a hinge seat of the bottom frame through a rotating shaft, a furnace body rotationally arranged on the overturning frame, an overturning oil cylinder arranged on the bottom frame and used for controlling the furnace body to overturn, and a driving device used for driving the furnace body to rotate, a furnace door is installed on the furnace body through an opening and closing mechanism, and a U-shaped groove is formed in the top of the furnace door. A shaft head of the rotating shaft is exposed out of the outer side of the hinge seat and is fixedly connected with a rotating drum, an air inlet is formed in the top of the rotating drum, an air outlet is formed in the side, away from the rotating shaft, of the rotating drum, and the air outlet is rotationally connected with a dust suction pipe; a dust collecting cover is arranged over the furnace door and fixedly connected with an air inlet of the rotary drum through a connecting pipe. According to the rotary calcining furnace, the dust collecting cover can automatically rotate along with the furnace body, so that smoke dust can be effectively absorbed in the calcining and discharging processes.

Description

Technical Field

[0001] The utility model relates to the field of calcination, in particular to a rotary calciner. Background Art

[0002] In the aluminum smelting process, the aluminum dross formed is subjected to primary aluminum ash treatment such as separation, cooling, and crushing to form aluminum ash powder with a particle size of less than 0.45 mm. The aluminum ash mainly consists of aluminum oxide, metallic aluminum, aluminum carbide, and a small amount of impurities such as silicon, iron, and calcium. Direct discharge will cause serious environmental impacts, such as soil pollution, water pollution, and air pollution. Currently, the non-aluminum components in the aluminum ash are mainly decomposed, oxidized, or volatilized through the calcination process to achieve the enrichment and purification of aluminum oxide. Specifically, at high temperatures, metallic aluminum and aluminum carbide in the aluminum ash will react with oxygen in the air respectively to form aluminum oxide. At the same time, some impurities such as silicon and calcium compounds may also decompose or transform into more stable forms at high temperatures and be separated through subsequent physical or chemical methods.

[0003] The equipment used for aluminum ash calcination is a rotary calciner. The existing rotary calciner collects the soot generated during calcination by setting a fixed dust hood above the furnace mouth. Although it can meet the dust removal effect, when the rotary calciner discharges materials obliquely, the fixedly installed dust hood cannot automatically follow the furnace body to adjust its position, resulting in an increased distance between the dust hood and the furnace mouth and a deviation in position. At this time, the soot generated during unloading cannot be completely and effectively collected. Therefore, the dust removal effect of the existing rotary calciner needs to be further improved to ensure the comfort of the production operation environment.

[0004] Based on this, the present application provides a rotary calciner whose dust hood can automatically rotate with the furnace body, thereby ensuring the effective absorption of soot during calcination and unloading. Summary of the Utility Model

[0005] The utility model aims to solve the technical problems existing in the prior art. For this purpose, the utility model provides a rotary calciner whose dust hood can automatically rotate with the furnace body, thereby ensuring the effective absorption of soot during calcination and unloading.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A rotary calcining furnace is provided, comprising a base frame, a turning frame rotatably connected to a hinged seat of the base frame via a rotating shaft, a furnace body rotatably arranged on the turning frame, a turning cylinder arranged on the base frame for controlling the turning of the furnace body, and a driving device for driving the furnace body to rotate; a furnace door is installed on the furnace body via an opening and closing mechanism, and a U-shaped groove is provided on the top of the furnace door; the shaft head of the rotating shaft is exposed outside the hinged seat and is fixedly connected to a rotating drum, an air inlet is provided on the top of the rotating drum, an air outlet is provided on a side away from the rotating shaft, and a dust suction pipe is rotatably connected to the air outlet; a dust collecting hood is provided directly above the furnace door, and the dust collecting hood is fixedly connected to the air inlet of the rotating drum via a connecting pipe.

[0008] In some optional embodiments, one end of the dust suction pipe located in the drum is configured as an inclined surface.

[0009] In some optional embodiments, a rotary seal is provided between the dust suction pipe and the air outlet of the drum.

[0010] In some optional embodiments, the turning frame is provided with four supporting wheels in a rectangular array, and the walking circle of the furnace body is placed on the supporting wheels.

[0011] In some optional embodiments, a frame is further provided on the turning frame, and a plurality of limiting wheels are further provided on the inner side of the walking circle of the frame to prevent the furnace body from tipping over when turning over and unloading.

[0012] In some optional embodiments, the driving device is connected to one of the supporting wheels via a belt drive, and the two supporting wheels on the same side of the supporting wheel are connected via a coupling.

[0013] In some optional embodiments, the dust collecting hood and the communication pipe are also fixedly mounted on the frame or the furnace body via a bracket.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a U-shaped groove on the furnace door as a smoke exhaust channel, so that the smoke generated by calcination can only be discharged from the U-shaped groove, which can effectively reduce the smoke exhaust area, is conducive to the dust collection of the dust hood, and is conducive to miniaturization of the dust collection hood; the assembly method of the dust collection hood, the rotating drum, and the dust collection pipe realizes that the dust collection hood can automatically rotate with the furnace body. This design ensures the dust removal effect of the smoke when the furnace body is tilted for unloading, and prevents the smoke from diffusing in the workshop and causing damage to the environment when the furnace body is tilted for unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0017] Figure 1 is the front view of the rotary calciner passed by the present utility model;

[0018] Figure 2 is the connection structure diagram of the rotary drum, the rotating shaft, the connecting pipe, and the dust suction pipe provided by the present utility model;

[0019] Figure 3 is Figure 1 the right view provided;

[0020] Figure 4 is Figure 3 the top view provided;

[0021] Figure 5 is the partial detail view of the rotary calciner provided by the present utility model;

[0022] Figure 6 is the assembly structure diagram of the opening and closing mechanism and the furnace door provided by the present utility model.

[0023] In the drawings, the list of components represented by each reference numeral is as follows:

[0024] 1 - chassis, 1.1 - hinge seat, 1.2 - rotating shaft, 2 - flipping frame, 2.1 - supporting wheel, 2.2 - frame, 2.3 - limiting wheel, 3 - furnace body, 4 - flipping oil cylinder, 5 - driving device, 5.1 - coupling, 6 - dust collection hood, 7 - opening and closing mechanism, 7.1 - mounting bracket, 7.2 - rotating shaft, 7.3 - pull rod, 7.4 - oil cylinder, 8 - furnace door, 8.1 - U-shaped groove, 9 - rotary drum, 10 - dust suction pipe, 11 - connecting pipe, 12 - rotary seal. Detailed implementation manners

[0025] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 construed as a limitation to the present utility model;

[0028] In addition, the descriptions involving terms such as "first" and "second" in the present utility model are only for descriptive purposes, and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. The terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0030] Embodiment 1

[0031] As shown in the attached Figure 1 to the attached Figure 6 figures, this embodiment provides a rotary calciner, which includes a chassis 1, a flipping frame 2, a furnace body 3, a flipping oil cylinder 4, a driving device 5, and a dust collection hood 6, wherein:

[0032] One end of the chassis 1 is provided with a hinge seat 1.1, and one end of the flipping frame 2 is rotatably connected to the hinge seat 1.1 through a rotating shaft 1.2; four idler wheels 2.1 arranged in a rectangular array are provided on the flipping frame 2, and the traveling ring of the furnace body 3 is placed on the idler wheels 2.1, realizing the rotational installation of the furnace body on the flipping frame; in order to limit the furnace body, frames 2.2 are arranged on both sides of the flipping frame 2, and a plurality of limiting wheels 2.3 are further provided on the frames 2.2 inside the traveling ring to prevent the furnace body from tipping over when discharging materials by flipping; one end of the flipping oil cylinder 4 is hinged to the chassis 1, and the other end is hinged to the frame 2.2 to control the flipping and discharging of the furnace body; the driving device 5 is installed on the flipping frame 2 to drive the idler wheels 2.1 to rotate, and then drive the furnace body 3 to rotate; specifically: as shown in the attached Figure 5As shown, the driving device 5 is drivingly connected to one of the supporting wheels by means of a belt drive, and the two supporting wheels on the same side as this supporting wheel are connected by a coupling 5.1. This driving method can improve the driving efficiency of the furnace body; the dust hood 6 is arranged above one end of the furnace body 3 at the furnace mouth for sucking the soot during the calcination and unloading processes. In order to enable the dust hood to automatically follow the rotation of the furnace body for dust removal, the following design is made in this embodiment:

[0033] As shown in the appendix Figure 1 As shown, a furnace door 8 is installed on the furnace body 3 through an opening and closing mechanism 7, preferably a side-opening furnace door, and a U-shaped groove 8.1 is opened at the top of the furnace door 8. In this embodiment, by setting a U-shaped groove on the furnace door as the soot discharge channel, the soot generated during calcination can only be discharged from the U-shaped groove, which can effectively reduce the discharge area of the soot, is beneficial to the dust suction of the dust hood for the soot, and is beneficial to making the dust hood smaller. The opening and closing mechanism 7 of this embodiment is as shown in the appendix Figure 6 and includes a mounting bracket 7.1, a rotating shaft 7.2, a pull rod 7.3 and an oil cylinder 7.4. This opening and closing mechanism is a prior art and will not be elaborated here.

[0034] As shown in the appendix Figure 1 and the appendix Figure 2 As shown, the shaft head of the rotating shaft 1.2 protrudes outside the hinge seat 1.1 and is fixedly connected to a rotating cylinder 9. The top of the rotating cylinder 9 is provided with an air inlet, and the side far from the rotating shaft 1.2 is provided with an air outlet. The air outlet is rotatably connected to a dust suction pipe 10. The dust hood 6 is arranged directly above the furnace door 8, and its air inlet is fixedly connected to the rotating cylinder 9 through a connecting pipe 11. This design realizes that the dust hood can automatically follow the rotation of the furnace body, so that the furnace body can also ensure the dust removal effect on the soot when it is tilted for unloading, and prevent the soot from being dispersed in the workshop when the furnace body is tilted for unloading and damaging the environment.

[0035] Preferably, as shown in the appendix Figure 2 As shown, the end of the dust suction pipe 10 located inside the rotating cylinder 9 is set as an inclined surface. This design does not affect the ventilation volume and ensures the dust extraction effect.

[0036] Preferably, as shown in the appendix Figure 2 As shown, a rotary seal 12 is provided between the dust suction pipe 10 and the air outlet of the rotating cylinder 9 to ensure the negative pressure effect of the dust hood.

[0037] Preferably, the dust hood 6 and the connecting pipe 11 are also fixedly installed on the frame 2.2 or the furnace body 3 through brackets.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A rotary calcining furnace, comprising a base frame, a turning frame rotatably connected to a hinged seat of the base frame through a rotating shaft, a furnace body rotatably arranged on the turning frame, a turning cylinder arranged on the base frame to control the turning of the furnace body, and a driving device to drive the furnace body to rotate; characterized in that: A furnace door is installed on the furnace body through an opening and closing mechanism, and a U-shaped groove is opened on the top of the furnace door; The shaft head of the rotating shaft is exposed outside the hinge seat and is fixedly connected to a rotating drum. The top of the rotating drum is provided with an air inlet, and a side away from the rotating shaft is provided with an air outlet. The air outlet is rotatably connected to a dust suction pipe. A dust collecting hood is provided just above the furnace door, and the dust collecting hood is fixedly connected to the air inlet of the rotating drum through a connecting pipe.

2. The rotary calciner according to claim 1, characterized in that: One end of the dust suction pipe located in the rotating drum is configured as an inclined surface.

3. The rotary calciner according to claim 1, characterized in that: A rotary seal is arranged between the dust suction pipe and the air outlet of the rotary drum.

4. The rotary calciner according to claim 1, wherein: The overturning frame is provided with four supporting wheels in a rectangular array, and the walking circle of the furnace body is placed on the supporting wheels.

5. The rotary calciner according to claim 4, characterized in that: The overturning frame is also provided with a frame, and the frame is also provided with a plurality of limiting wheels on the inner side of the walking circle to prevent the furnace body from tipping over when the furnace body is overturned for unloading.

6. The rotary calciner according to claim 4, characterized in that: The driving device is connected to one of the supporting wheels by belt transmission, and the two supporting wheels on the same side of the supporting wheel are connected by a coupling.

7. The rotary calciner according to claim 5, characterized in that: The dust collecting hood and the communication pipe are also fixedly mounted on the frame or the furnace body through a bracket.

Images