Feeding device for aluminum ore roasting

Abstract

The utility model relates to the technical field of aluminum ore roasting equipment, and provides a feeding device for roasting aluminum ore, which aims at solving the problems of poorer roasting effect and lower yield of roasted products caused by insufficient uniformity of feeding speed and problems during roasting of bauxite in the prior art, and comprises a feeding channel, a feeding port is arranged at the top end of the feeding channel, and a discharging port is arranged at the bottom end of the feeding channel. The bottom end of the feeding channel communicates with a roasting furnace, and the feeding channel is spirally wound around the outer side wall of the roasting furnace. A plurality of flow limiting mechanisms are arranged on the inner side wall of the feeding channel, the flow limiting mechanisms are arranged at intervals, each flow limiting mechanism comprises a flow limiting plate, and the flow limiting plates are rotationally connected with the feeding channel. The aluminum ore enters the roasting furnace through the spiral feeding channel, the entering speed of the aluminum ore is controlled through the multiple flow limiting mechanisms, and the preheating effect can be achieved on the outer side wall of the roasting furnace, so that the uniform heating effect of the aluminum ore is optimized, and heat energy can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of bauxite roasting equipment, and particularly relates to a feeding device for bauxite roasting. Background Art

[0002] Most of the aluminum in nature comes from bauxite. In the aluminum metallurgy industry, aluminum can be extracted from bauxite through roasting. The specific process is as follows: (1) First, the bauxite is crushed and ground into small particles to improve the subsequent separation efficiency; (2) The finely crushed bauxite is mixed and roasted with auxiliary materials such as limestone to convert the aluminum in the bauxite into calcium aluminate, and then washed to remove impurities; (3) Then, through a chemical reaction, calcium aluminate reacts with water to be converted into aluminum hydroxide; (4) Finally, through methods such as calcination and electrolysis, aluminum hydroxide can be sequentially converted into aluminum oxide and metallic aluminum.

[0003] Among them, a special roasting device is required for the roasting process, and the roasting temperature in its furnace can reach above 1000°C, enabling the bauxite to be fully heated and converted. For example, the patent with the publication number CN215757536U provides a high-efficiency bauxite roasting device, including a base and a support frame. A fixed seat is arranged on the top of the base, and a first servo motor is installed inside the fixed seat. A belt is arranged at the end of the servo motor, and a transmission shaft is arranged at the end of the belt. A discharge plate is arranged at the end of the transmission shaft, and a collection bucket is arranged at the bottom of the discharge plate. A sliding foot is arranged at the bottom of the collection bucket, and a slide rail is reserved on the outside of the sliding foot. The support frame is arranged on the side of the collection bucket, and a heating device is installed in the middle of the support frame. A second servo motor is installed at the end of the support frame, and a connecting shaft is arranged at the end of the second servo motor. A stirring plate is arranged on the outer wall of the connecting shaft, and a stirring tank is arranged on the outside of the stirring plate. This device can achieve automatic discharging and uniform heating and roasting of raw materials.

[0004] However, it is found in the actual production and processing process that the heating effect of bauxite during roasting is not only affected by the heating of the device itself, but also to a large extent affected by factors such as the material processing volume and the feeding speed. Based on the optimal processing volume of different furnaces, it is extremely important to control the feeding speed evenly and stably, which will significantly affect the roasting effect and yield of bauxite. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems that the existing bauxite has a poor roasting effect and a low yield of roasted products due to insufficiently uniform feeding speed during roasting. This application provides a feeding device for bauxite roasting. The bauxite enters the roasting furnace through a spiral feeding channel, and a plurality of current-limiting mechanisms are used to control the feeding rate of the bauxite. Moreover, the outer wall of the roasting furnace can achieve a preheating effect, thereby optimizing the uniform heating effect of the bauxite and saving heat energy.

[0006] The utility model is realized through the following technical solutions:

[0007] A feeding device for aluminum ore roasting, comprising a feeding channel, a feeding port is arranged at the top end of the feeding channel, the bottom end of the feeding channel is communicated with a roasting furnace, and the feeding channel is spirally wound around the outer side wall of the roasting furnace; a plurality of current-limiting mechanisms are arranged on the inner side wall of the feeding channel, the plurality of current-limiting mechanisms are arranged at intervals, the current-limiting mechanism includes a current-limiting plate, and the current-limiting plate is rotatably connected with the feeding channel.

[0008] Preferably, a brush tooth is arranged on one side of the current-limiting plate close to the bottom of the feeding channel, the current-limiting plate is arranged obliquely to the horizontal direction, and the side of the current-limiting plate with the brush tooth is close to the bottom of the feeding channel.

[0009] Preferably, a heat-insulating layer is wrapped on the side wall of the feeding channel.

[0010] Preferably, a feed hopper is arranged at the top end of the feeding channel.

[0011] Preferably, the current-limiting mechanism further includes a shaft rod, the shaft rod is arranged along a direction parallel to the bottom of the feeding channel, and the shaft rod is rotatably connected with the feeding channel, and the current-limiting plate is arranged on the side wall surface of the shaft rod.

[0012] Preferably, a driving motor is arranged at the end of the shaft rod, and the end of the shaft rod is detachably connected with the through shaft of the driving motor.

[0013] Preferably, a plurality of weight sensors are embedded at the bottom of the feeding channel, and each weight sensor is correspondingly arranged on the downstream side of one current-limiting mechanism.

[0014] Preferably, the current-limiting mechanism is further provided with a control system, the control system includes the weight sensor, a controller, the driving motor and a power supply, the controller is electrically connected with the driving motor and the weight sensor respectively, and the power supply is electrically connected with the weight sensor, the controller and the driving motor respectively.

[0015] The technical solution of the utility model has the following beneficial effects:

[0016] The feeding device for aluminum ore roasting of the present utility model is configured on the outer periphery of a conventional roasting furnace and feeds materials through a feeding channel with a spiral structure. The aluminum ore enters the roasting furnace through the spiral feeding channel, and a plurality of current-limiting mechanisms are used to control the feeding rate of the aluminum ore, so as to achieve uniform and stable feeding, enabling materials such as aluminum ore to be heated evenly and sufficiently. In addition, the outer side wall of the roasting furnace can achieve a preheating effect, making greater use of the heating energy in the roasting furnace, thereby optimizing the uniform heating effect of the aluminum ore and achieving efficient utilization of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of the feeding device and the roasting furnace in Embodiment 1;

[0019] Figure 2 Structural schematic diagram of the feeding device and the roasting furnace in Embodiment 1 (the feeding device is in a partially sectional state);

[0020] Figure 3 For Figure 2 Partial enlarged structural schematic diagram of part A in;

[0021] Figure 4 For Figure 2 Partial enlarged structural schematic diagram of part B in;

[0022] Figure 5 Partial structural schematic diagram of the feeding channel in Embodiment 1;

[0023] Figure 6 Circuit schematic diagram of the feeding device in Embodiment 1.

[0024] Reference numerals in the drawings: 1 - feeding channel, 11 - feeding port, 12 - heat insulation layer, 13 - feeding hopper, 21 - current-limiting plate, 22 - brush teeth, 23 - shaft rod, 31 - driving motor, 32 - weight sensor, 33 - controller, 34 - power supply, 4 - roasting furnace. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] Embodiment 1

[0029] As Figures 1 to 6 shown, this embodiment provides a feeding device for aluminum ore roasting, including a feeding channel 1. A feeding port 11 is provided at the top end of the feeding channel 1. The bottom end of the feeding channel 1 is communicated with a roasting furnace 4. The feeding channel 1 is spirally wound around the outer side wall of the roasting furnace 4. A plurality of current-limiting mechanisms are arranged on the inner side wall of the feeding channel 1. The plurality of current-limiting mechanisms are arranged at intervals. The current-limiting mechanism includes a current-limiting plate 21. The current-limiting plate 21 is rotatably connected to the feeding channel 1. A brush tooth 22 is provided on the side of the current-limiting plate 21 close to the bottom of the feeding channel 1. The current-limiting plate 21 is arranged obliquely to the horizontal direction, and the side of the current-limiting plate 21 with the brush tooth 22 is close to the bottom of the feeding channel 1.

[0030] In this embodiment, the current-limiting mechanism further includes a shaft rod 23. The shaft rod 23 is arranged along a direction parallel to the bottom of the feeding channel 1, and the shaft rod 23 is rotatably connected to the feeding channel 1. The current-limiting plate 21 is arranged on the side wall surface of the shaft rod 23. A driving motor 31 is arranged at the end of the shaft rod 23. The end of the shaft rod 23 is welded to the through shaft of the driving motor 31.

[0031] In this embodiment, a plurality of weight sensors 32 are embedded at the bottom of the feeding channel 1. Each weight sensor 32 is correspondingly arranged on the downstream side of a current-limiting mechanism. The current-limiting mechanism is further equipped with a control system. The control system includes a weight sensor 32, a controller 33, a driving motor 31, and a power supply 34. The controller 33 is electrically connected to the driving motor 31 and the weight sensor 32 respectively. The power supply 34 is electrically connected to the weight sensor 32, the controller 33, and the driving motor 31 respectively.

[0032] In this embodiment, the controller 33 is selected as a single-chip microcomputer (such as the 8051 series single-chip microcomputer, STM32 series single-chip microcomputer), which is used to process the data signals monitored by the weight sensor 32. When the weight is too large, it means that there is too much material. At this time, the control drive motor 31 drives the shaft rod 23 to rotate, so that the brush tooth 22 end of the current-limiting plate 21 further rotates obliquely upward to the bottom of the feeding channel 1, thereby restricting the flow rate of the material, that is, achieving an effective current-limiting effect to ensure uniform heating of materials such as bauxite; otherwise, the shaft rod 23 is controlled to rotate in the opposite direction.

[0033] In this embodiment, the side wall of the feeding channel 1 is provided with a heat preservation layer 12 to reduce heat loss.

[0034] In this embodiment, the top end of the feeding channel 1 is configured with a feeding hopper 13 to facilitate feeding.

[0035] The roasting furnace 4 involved in this embodiment adopts a common vertical high-temperature furnace, which belongs to conventional equipment, and this embodiment does not make special improvements to it. Therefore, there is no need to describe the internal structure of the roasting furnace 4 in detail. Therefore, those skilled in the art can directly adopt the existing structure of the roasting furnace 4 and combine it with the above-mentioned feeding device for bauxite roasting in this embodiment, so as to achieve uniform and stable feeding, make materials such as bauxite be heated evenly and sufficiently, and make greater use of the heating energy in the roasting furnace 4 to achieve efficient utilization of energy.

[0036] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A feeding device for aluminum ore roasting, characterized in that: It comprises a feeding channel (1), the top of which is provided with a feeding port (11), the bottom of which is connected to a roasting furnace (4), and the feeding channel (1) is spirally wound around the outer wall of the roasting furnace (4); The inner side wall of the feeding channel (1) is provided with a plurality of flow limiting mechanisms, the plurality of flow limiting mechanisms are arranged at intervals, the flow limiting mechanisms include a flow limiting plate (21), and the flow limiting plate (21) is rotatably connected to the feeding channel (1).

2. The feeding device for aluminum ore roasting according to claim 1, characterized in that: A brush tooth (22) is arranged on one side of the flow limiting plate (21) close to the bottom of the feeding channel (1); the flow limiting plate (21) is arranged in a direction inclined to the horizontal, and one side of the brush tooth (22) of the flow limiting plate (21) is arranged close to the bottom of the feeding channel (1).

3. The feeding device for aluminum ore roasting according to claim 1, characterized in that: The side wall of the feeding channel (1) is provided with a heat-insulating layer (12).

4. The feeding device for aluminum ore roasting according to claim 1, characterized in that: A feeding hopper (13) is arranged at the top end of the feeding channel (1).

5. The feeding device for aluminum ore roasting according to any one of claims 1 to 4, characterized in that: The flow limiting mechanism also includes a shaft rod (23), the shaft rod (23) is arranged in a direction parallel to the bottom of the feeding channel (1), and the shaft rod (23) is rotatably connected to the feeding channel (1), and the flow limiting plate (21) is arranged on the side wall surface of the shaft rod (23).

6. The feeding device for aluminum ore roasting according to claim 5, characterized in that: The end of the shaft rod (23) is provided with a driving motor (31), and the end of the shaft rod (23) is detachably connected to a through shaft of the driving motor (31).

7. The feeding device for aluminum ore roasting according to claim 6, characterized in that: A plurality of weight sensors (32) are embedded in the bottom of the feeding channel (1), and each of the weight sensors (32) is correspondingly arranged on the downstream side of one of the flow limiting mechanisms.

8. The feeding device for aluminum ore roasting according to claim 7, characterized in that: The current limiting mechanism is also provided with a control system, which comprises the weight sensor (32), a controller (33), the drive motor (31) and a power supply (34); the controller (33) is electrically connected to the drive motor (31) and the weight sensor (32), respectively; and the power supply (34) is electrically connected to the weight sensor (32), the controller (33) and the drive motor (31), respectively.

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