Aluminum electrolysis anode scrap waste heat utilization device

Abstract

The utility model discloses an aluminum electrolysis anode scrap waste heat utilization device which comprises a trailer, the trailer is provided with a carriage body, a door body is installed on one side of the carriage body, heat preservation materials are laid on the inner wall and the bottom face of the carriage body to form a heat preservation layer, a heat conduction layer is laid on the heat preservation layer on the bottom face of the carriage body, and a plurality of anode scraps and a plurality of new anodes are placed on the heat conduction layer. And the residual poles and the new poles are arranged in a staggered manner. According to the utility model, the new electrode can be preheated by utilizing the residual heat of the residual electrode, and then the preheated new electrode is put into the electrolytic bath for use, so that the heating time and the energy consumption loss of the new electrode in the electrolytic bath can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization of aluminum electrolysis residual electrodes, specifically to a device for utilizing waste heat of aluminum electrolysis residual electrodes. Background Technology

[0002] Electrolytic aluminum, which is aluminum metal extracted directly through electrolysis, is the core product of the modern aluminum industry. Its production process employs advanced cryolite-alumina molten salt electrolysis technology, where molten cryolite serves as a highly efficient solvent, and alumina is the key solute component. This process centers on a carbonaceous anode and a molten aluminum cathode, and a powerful direct current is applied to an electrolytic cell at temperatures ranging from 950°C to 970°C, triggering complex electrochemical reactions to achieve the electrolytic refining of aluminum.

[0003] In the electrolytic aluminum production process, approximately 450 to 550 kilograms of carbonaceous anodes are consumed for every ton of aluminum produced. The anode surface wears an average of 1 to 2 centimeters per day, requiring regular replacement every 18 to 28 days. Notably, during replacement, the large amount of heat carried by the old anode (residual anode) is often directly dissipated into the environment, resulting in significant energy waste. Furthermore, when the new anode is first introduced into the high-temperature electrolyte, it absorbs a massive amount of heat from the electrolytic cell to reach its normal operating temperature. This process not only severely disrupts the stable operation of the electrolytic cell but also causes a decrease in alumina solubility and a rise in cell pressure due to rapid electrolyte condensation, further exacerbating overall energy consumption. In addition, the rapid temperature changes can cause breakage and cracks in the new anode carbon blocks, further affecting their service life and electrolytic efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the residual electrode heat energy in aluminum electrolysis production is not utilized and the new electrode is used directly without preheating. This utility model provides an aluminum electrolysis residual electrode waste heat utilization device that can utilize the residual electrode heat energy to preheat the new electrode.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A device for utilizing waste heat from aluminum electrolysis electrodes includes a trailer with a cargo box. A door is installed on one side of the cargo box. Insulation material is laid on the inner wall and bottom of the cargo box to form an insulation layer. A heat-conducting pad is laid on the insulation layer on the bottom of the cargo box. Multiple waste electrodes and multiple new electrodes are placed on the heat-conducting pad, and the waste electrodes and the new electrodes are arranged alternately.

[0007] This utility model provides a compartment with an insulation layer on the inner wall and bottom surface. A heat-conducting pad is laid on the insulation layer on the bottom surface of the compartment. A residual electrode and a new electrode are placed on the heat-conducting pad. The heat on the residual electrode can be transferred to the new electrode through the heat-conducting pad, thereby utilizing the heat energy of the residual electrode to preheat the new electrode.

[0008] Preferably, the top of the compartment is provided with multiple opening slots for placing residual and new electrode conductive rods, so as to avoid making the volume of the compartment too large, thereby saving manufacturing costs.

[0009] Preferably, the door is a sliding track door.

[0010] Preferably, the facade of the compartment is formed by a stainless steel structural frame, and the bottom surface of the compartment is made of cast steel plate.

[0011] Preferably, the trailer is equipped with multiple wheels at the bottom to facilitate its movement.

[0012] Preferably, a temperature-controlled thermocouple is installed inside the compartment, and the signal line of the temperature-controlled thermocouple is connected to an external display device to display the temperature inside the compartment.

[0013] Preferably, four residual electrodes and two new electrodes are placed inside the compartment, with one new electrode sandwiched between every two residual electrodes.

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

[0015] 1) This utility model can utilize the residual heat of the residual electrode to preheat the new electrode, and then put the preheated new electrode into the electrolytic cell for use, which can greatly reduce the heating time and energy loss of the new electrode in the electrolytic cell. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1 is the residual electrode, 2 is the new electrode, 3 is the insulation layer, 4 is the door body, 5 is the base, 6 is the wheel, 7 is the opening slot, and 8 is the conductive rod. Detailed Implementation

[0019] The present invention will be further described below with reference to specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1 An embodiment of the waste heat utilization device for aluminum electrolysis residual electrodes of this utility model includes a trailer, residual electrodes 1 and new electrodes 2. The trailer is equipped with a box body. The inner wall and bottom surface of the box body are covered with a heat insulation layer 3 formed by high temperature resistant heat insulation material. A high temperature heat-conducting pad is laid on the heat insulation layer 3 on the bottom surface of the box body. Four residual electrodes 1 and two new electrodes 2 are placed on the heat-conducting pad, and the arrangement order is 2 residual electrodes 1, 2 new electrodes 2, and 2 residual electrodes 1.

[0023] To facilitate the entry and exit of the residual electrode 1 and the new electrode 2, a door 4 is installed on one side of the compartment. The door 4 is preferably a sliding door. The door 4 preferably has a stainless steel frame structure, and its interior is lined with high-temperature resistant insulation material.

[0024] The top of the compartment has six opening slots 7 for placing the conductive rods 8 of the residual electrode 1 and the new electrode 2. The compartment is placed on a base 5, the bottom of which has four wheels 6 for easy movement of the trailer.

[0025] The bottom of the compartment is made of cast steel plate, and the three sides of the compartment are formed by a stainless steel structural frame.

[0026] In use, this invention involves first placing two new electrodes 2 on a heat-conducting pad inside the compartment. Then, the trailer is towed to the vicinity of the electrolytic cell where the anode needs to be replaced. After the residual electrode 1 is removed from the electrolytic cell, it is placed in the pre-reserved storage space inside the compartment. The door 4 is then closed to preheat the new electrodes 2. During preheating, the residual electrode 1 and the new electrodes 2 transfer heat through the high-temperature heat-conducting pad, thus preheating the new electrodes 2. The insulation layer 3 inside the compartment reduces heat loss and improves waste heat utilization efficiency. After preheating, the preheated new electrodes 2 are placed in the electrolytic cell, significantly reducing the heating time and energy loss of the new electrodes 2 within the cell.

[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model should fall within the protection scope of the technical solution of this utility model.

Claims

1. A device for utilizing waste heat from aluminum electrolysis electrodes, comprising a trailer, characterized in that, The trailer has a body with a door installed on one side. The inner wall and bottom of the body are covered with insulation material to form an insulation layer. A heat-conducting layer is laid on the insulation layer on the bottom of the body. Multiple residual electrodes and multiple new electrodes are placed on the heat-conducting layer, and the residual electrodes and the new electrodes are arranged alternately.

2. The aluminum electrolysis residual heat utilization device according to claim 1, characterized in that, The top of the compartment is provided with multiple opening slots for placing residual and new electrode conductive rods.

3. The waste heat utilization device for aluminum electrolysis electrodes according to claim 1, characterized in that, The door is a sliding track door.

4. The waste heat utilization device for aluminum electrolysis electrodes according to claim 1, characterized in that, The facade of the compartment is formed by a stainless steel structural frame, and the bottom surface of the compartment is made of cast steel plate.

5. The waste heat utilization device for aluminum electrolysis electrodes according to claim 1, characterized in that, The trailer is equipped with multiple wheels at its bottom.

6. The waste heat utilization device for aluminum electrolysis electrodes according to claim 1, characterized in that, The compartment is equipped with a temperature-controlled thermocouple, and the signal line of the temperature-controlled thermocouple is connected to an external display device.

7. The waste heat utilization device for aluminum electrolysis electrodes according to claim 1, characterized in that, The compartment contains four residual electrodes and two new electrodes, with a new electrode sandwiched between every two residual electrodes.

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