Device for enhancing building of thermal insulation lining at corner of electrolytic cell

Abstract

The utility model discloses a device for enhancing building of an electrolytic cell corner thermal insulation lining, which comprises a cell shell and an artificial corner mechanism, corners of the cell shell in the vertical direction are chamfered, a thermal insulation layer is arranged at the corners of the cell circumference on the inner side of the cell shell, a bottom layer lining is arranged on the inner bottom wall of the cell shell and is positioned above the thermal insulation layer, and the artificial corner mechanism is arranged on the bottom layer lining. Insulating bricks are built at chamfers on the periphery of the groove on the outer side of the groove shell; and the artificial extension legs are arranged between the insulating layer in the groove shell and the bottom lining. The utility model belongs to the technical field of thermal equipment for aluminum electrolysis production, and particularly relates to a device for building a heat-insulating lining at a corner of an enhanced electrolytic cell, which is used for relieving a top anode caused by cold corner of an energy-saving cell and large extension legs.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal equipment in aluminum electrolysis production, in particular to a device for reinforcing the thermal insulation lining of an electrolytic cell corner. Background Art

[0002] Aluminum electrolytic cell is the main thermal equipment in aluminum electrolysis production. Its lining structure and material selection are extremely important for the stable operation and index optimization of the electrolytic cell.

[0003] The current design height of the molten pool of 400KA and above aluminum electrolytic cells is about 580mm-600mm. The masonry structure around the side of the cell is to build a circle of silicon nitride combined with silicon carbide blocks or combined with part of the carbon blocks close to the cell shell, and then build a circle of equal-height carbon special-shaped blocks close to the silicon nitride combined with silicon carbide blocks (except the four corners) with staggered joints. The design height of the carbon special-shaped blocks is about 370mm-430mm. The corners are fixed with paste, and the height of the artificial legs at the corners is the same as that of the special-shaped blocks on the sides.

[0004] This structure has the following main disadvantages:

[0005] (1) The insulation effect of the corners is poor, and the corners are prone to long legs;

[0006] (2) High, steep and thick artificial legs are beneficial to reducing the aluminum liquid electrolyte interface area, reducing the secondary dissolution of aluminum liquid and improving current efficiency, but they are prone to cause corner hypertrophy at the corners, resulting in the formation of anode top guide rods. Utility Model Content

[0007] The technical problem to be solved by the utility model is to alleviate the problem of the corner of the energy-saving trough being too cold and the top anode being caused by the enlarged legs.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a device for enhancing the thermal insulation lining at the corners of an electrolytic cell, comprising a cell shell and an artificial corner mechanism, the vertical corners of the cell shell are chamfered, the corners of the inner side of the cell shell are provided with an insulation layer, the inner bottom wall of the cell shell is provided with a bottom lining, and is located above the insulation layer, the chamfers of the outer side of the cell shell are provided with insulation bricks, and the artificial corner mechanism is arranged between the insulation layer and the bottom lining inside the cell shell.

[0009] Furthermore, the artificial corner mechanism includes a corner-pasted artificial leg, a first special-shaped carbon block and a second special-shaped carbon block. The corner-pasted artificial leg is arranged between the insulation layer and the bottom lining, and is located at the inner chamfer of the insulation layer and extends toward the two adjacent oblique sides. The second special-shaped carbon block is fixedly connected to the two end extensions of the corner-pasted artificial leg, and the first special-shaped carbon block is fixedly connected to the end of the second special-shaped carbon block away from the corner-pasted artificial leg.

[0010] Preferably, the width of the second special-shaped carbon block is 200 mm, and the width of the first special-shaped carbon block is 400 mm;

[0011] The artificial legs pasted at the corners have a height of 200 mm and a width of 100 mm, and the artificial legs pasted at the corners transition to extend to both sides to a height of 300 mm.

[0012] Furthermore, the bottom lining adopts two layers of xonotlite insulation boards with a thickness of 2×50 mm and an area of 600 mm×600 mm; the specification of the xonotlite insulation boards is G300 or G400.

[0013] Preferably, the thermal insulation layer is made of a nano heat insulation board, the height of the nano heat insulation board is equal to the height of the trough circumference of the trough body, and the thickness is 10 mm.

[0014] Preferably, the thermal insulation bricks are made of lightweight clay or diatomaceous earth.

[0015] After adopting the above structure, the beneficial effects of the utility model are as follows: in view of the cold corners and enlarged legs of the aluminum electrolytic cell in aluminum electrolysis production, insulation structures are locally added to the bottom and inner side of the cell to improve the insulation effect of the cell shell corners, reduce the size of the artificial legs at the corners, and allow the artificial legs at the corners to be immersed in the aluminum liquid layer, effectively avoiding the problem of excessive corner legs causing the anode top guide rod to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0017] Figure 1 The present invention is a schematic diagram of the structure of a device for enhancing the thermal insulation lining of the corners of an electrolytic cell.

[0018] In the attached drawings: 1. tank shell, 2. artificial corner mechanism, 3. insulation layer, 4. bottom lining, 5. insulation bricks, 6. artificial legs pasted at corners, 7. first special-shaped carbon block, 8. second special-shaped carbon block. DETAILED DESCRIPTION

[0019] like Figure 1As shown, a device for enhancing the thermal insulation lining of the corners of an electrolytic cell is shown. It includes a cell shell 1 and an artificial corner mechanism 2. The vertical corners of the cell shell 1 are chamfered, and an insulation layer 3 is provided at the corners of the inner periphery of the cell shell 1. The inner bottom wall of the cell shell 1 is provided with a bottom lining 4, which is located above the insulation layer 3. Insulation bricks 5 are laid at the chamfers of the outer periphery of the cell shell 1. The artificial corner mechanism 2 is provided between the insulation layer 3 and the bottom lining 4 inside the cell shell 1. The bottom lining 4 effectively increases the thermal insulation of the cell bottom corner below the corner anti-seepage material. The insulation layer 3 is tightly attached to the cell shell 1 on the inner side of the cell periphery, further enhancing the thermal insulation of the electrolytic cell corners, realizing thermal insulation of the corners inside and outside the cell, and effectively enhancing the thermal insulation effect of the electrolytic cell corners.

[0020] like Figure 1 As shown, in order to avoid the top anode caused by leg hypertrophy, the size of the corner-pasted artificial leg 6 is reduced, and the artificial corner mechanism 2 includes the corner-pasted artificial leg 6, a first special-shaped carbon block 7 and a second special-shaped carbon block 8. The corner-pasted artificial leg 6 is arranged between the insulation layer 3 and the bottom lining 4, and is located at the inner chamfer of the insulation layer 3 and extends to the two adjacent oblique sides. The second special-shaped carbon block 8 is fixedly connected to the two end extensions of the corner-pasted artificial leg 6, and the first special-shaped carbon block 7 is fixedly connected to the end of the second special-shaped carbon block 8 away from the corner-pasted artificial leg 6. The artificial leg of the aluminum electrolytic cell is made of carbon material. The size of the artificial corner mechanism 2 is reduced, and the corner-pasted artificial leg 6 is immersed in the aluminum liquid layer as a whole, which can effectively avoid the problem of top anode caused by leg hypertrophy.

[0021] The furnace sidewalls produced during the production process are solidified electrolytes. The thermal conductivity of carbon materials is better than that of solidified electrolytes, and the thermal conductivity coefficient is about 5 times that of solidified electrolytes. The size of the artificial legs at the corners is reduced, leaving enough space for the solidified electrolyte furnace sidewalls to be generated at the corners, preventing the corner furnace sidewalls from growing to the bottom of the anode, and the thicker solidified electrolyte furnace sidewalls at the corners enhance the thermal insulation of the corners.

[0022] Among them, the width of the second special-shaped carbon block 8 is 200mm, and the width of the first special-shaped carbon block 7 is 400mm; the height of the artificial legs 6 pasted at the corners is 200mm and the width is 100mm, and the artificial legs 6 pasted at the corners transition to extend to 300mm on both sides; the bottom lining 4 adopts 2 layers of hard calcium silicate insulation board with a thickness of 2×50mm and an area of 600mm×600mm; the specification of the hard calcium silicate insulation board is G300 or G400; the insulation layer 3 adopts nano insulation board, the height of the nano insulation board is equal to the trough height of the trough body, and the thickness is 10mm; the insulation brick 5 is made of lightweight clay or diatomaceous earth material.

[0023] In specific use, during the aluminum electrolysis production process, the bottom lining 4 effectively increases the thermal insulation of the bottom corner of the tank under the corner anti-seepage material, and the thermal insulation layer 3 is close to the tank shell 1 on the inner side of the tank circumference angle, thereby enhancing the thermal insulation of the corner of the electrolytic cell, and insulating the corners inside and outside the tank, thereby enhancing the thermal insulation effect of the corner of the electrolytic cell;

[0024] At the same time, the size of the artificial corner mechanism 2 is reduced, and the artificial legs 6 pasted at the corners are immersed in the aluminum liquid layer as a whole, which can effectively avoid the top anode problem caused by the enlarged legs; the furnace side produced in the production process is solidified electrolyte, and the thermal conductivity of carbon materials is better than that of solidified electrolyte, and the thermal conductivity coefficient is about 5 times that of solidified electrolyte. Reducing the size of the artificial legs at the corners leaves enough space for the solidified electrolyte furnace side to be generated at the corners, avoiding the corner furnace side from growing to the bottom of the anode, and the thicker corner solidified electrolyte furnace side strengthens the thermal insulation of the corners.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents. In short, if those skilled in the art are inspired by the present invention and, without departing from the purpose of the present invention, design structures and embodiments similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A device for enhancing the thermal insulation lining of the corners of an electrolytic cell, characterized by: It includes a trough shell and an artificial corner mechanism. The vertical corners of the trough shell are chamfered, and the corners of the inner trough of the trough shell are provided with an insulation layer. The inner bottom wall of the trough shell is provided with a bottom lining, and is located above the insulation layer. The chamfers of the outer trough of the trough shell are laid with insulation bricks, and the artificial corner mechanism is arranged between the insulation layer and the bottom lining inside the trough shell.

2. The device for enhancing the thermal insulation lining of the electrolytic cell corner according to claim 1, characterized in that: The artificial corner mechanism includes a corner pasted artificial leg, a first special-shaped carbon block and a second special-shaped carbon block. The corner pasted artificial leg is arranged between the insulation layer and the bottom lining, and is located at the inner chamfer of the insulation layer and extends to the two adjacent oblique sides. The second special-shaped carbon block is fixedly connected to the two end extensions of the corner pasted artificial leg, and the first special-shaped carbon block is fixedly connected to the end of the second special-shaped carbon block away from the corner pasted artificial leg.

3. The device for enhancing the thermal insulation lining of the electrolytic cell corner according to claim 2, characterized in that: The width of the second special-shaped carbon block is 200 mm, and the width of the first special-shaped carbon block is 400 mm; The artificial legs pasted at the corners have a height of 200 mm and a width of 100 mm, and the artificial legs pasted at the corners transition to extend to both sides to a height of 300 mm.

4. The device for enhancing the thermal insulation lining of the electrolytic cell corners according to claim 1, characterized in that: The bottom lining adopts two layers of xonotlite insulation boards with a thickness of 2×50mm and an area of 600mm×600mm; the specification of the xonotlite insulation boards is G300 or G400.

5. The device for enhancing the thermal insulation lining of the electrolytic cell corners according to claim 1, characterized in that: The heat-insulating layer adopts a nano heat-insulating board, the height of the nano heat-insulating board is equal to the height of the trough circumference of the trough body, and the thickness is 10mm.

6. The device for enhancing the thermal insulation lining of the electrolytic cell corners according to claim 1, characterized in that: The thermal insulation bricks are made of light clay or diatomaceous earth.

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