Protection means used for calcination starting or preheating exchanging inert anode for electrolysis of aluminium

A technology of inert anodes and protection devices, applied in the field of inert anodes, can solve problems such as non-damage replacement

Inactive Publication Date: 2006-09-13
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, after the inert anode has been used normally and reached its service life, there is also the problem of non-damage replacement

Method used

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  • Protection means used for calcination starting or preheating exchanging inert anode for electrolysis of aluminium
  • Protection means used for calcination starting or preheating exchanging inert anode for electrolysis of aluminium
  • Protection means used for calcination starting or preheating exchanging inert anode for electrolysis of aluminium

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 , depicting the schematic structure of a protective device for cylindrical or cup-shaped inert anodes. It mainly includes an anode guide rod 1, a conductive terminal 2, a suspension hole 3, a cylindrical or rectangular parallelepiped anode protective tank body 4, an inert anode 5, and a filling material 6. The tank body 4 of the anode protection device has a cylindrical structure, and the tank body and end caps can be made of graphite, petroleum coke, coke, etc., or a mixture thereof. The conductive terminal 2 is made of steel or carbonaceous material and is tightly connected with the end cover by means of mechanical or bonding. The working surface of the tank body is the bottom of the tank body, and its thickness is larger than that of the tank wall, generally 3 to 20 times the thickness of the tank wall. In addition to the space for anodes, a space of 5-50mm is reserved on the top, bottom, left, and right sides of the tank for filling material space...

Embodiment 2

[0032] image 3 It is a schematic diagram of the structure of an inert anode protection device with a frustum of cone structure, Figure 5 It is a structural schematic diagram of an inert anode protection device with a multi-step structure, including an anode guide rod 1, a conductive terminal 2, a suspension hole 3, a frustum or multi-step type anode protection device tank 4, an inert anode 5, and a filling material 6. The tank structure of this type of anode protection device adopts a cone or multi-step design, the top is small and the bottom is large, and the bottom of the tank is specially thickened, so it is especially suitable for the firing start-up of aluminum electrolytic cells. The materials used and the operation method of the protective device are the same as those in Example 1. Due to its large size and weight, holes are drilled in the tank body and a suspension mechanism is added.

Embodiment 3

[0034] Figure 7 The schematic structure of flat and disc-shaped inert anode protection devices is described. It mainly includes an anode guide rod 1, a conductive terminal 2, a suspension hole 3, a plate-shaped or sheet-shaped inert anode protection device tank 4, an inert anode 5, and a filling material 6. The materials used and the operation method of the protective device are the same as those in Example 1. Since the plate-shaped or sheet-shaped inert anode uses the side as the working surface, the side of the tank of the anode protection device adopts a thickened design and adds a suspension and lead-out mechanism to ensure the needs of use.

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Abstract

The invention relates to a protection device that is used to aluminum electrolyzing inert anode baking starting or exchanging that includes tank loading inert anode, the cover end, conductive terminal. Hanging or hoisting hole is set on the tank or cover end, and holes are set on the cover end. The inert anode is loaded inner the tank, and the anode guiding bar passing through the hole on the cover end. The invention could avoid the inert anode impact of strong heat, electric and heat corrosion gas, and has heat preservation protect to the inert node and the electrolytic tank.

Description

technical field [0001] The invention relates to aluminum electrolysis and an inert anode for aluminum electrolysis, in particular to a protection device used in conjunction with the inert anode for the firing start of an electrolytic cell and the replacement of the inert anode in aluminum electrolysis production. Background technique: [0002] The use of inert anodes to replace existing carbon anodes is a trend in the development of modern aluminum electrolysis production. The inert anode materials of electrolytic aluminum mainly fall into three categories: metal, ceramic and cermet. During the use of the inert anode, two process stages must be experienced: the firing start-up of the electrolyzer and the replacement of the anode. In terms of the roasting start-up of the electrolytic cell, the current common practice at home and abroad is to use carbon anodes to start the roasting of the electrolytic cell, and then replace the carbon anodes with inert anodes one after anothe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/12
Inventor 李志友赖延清张雷张刚周科朝李劼张吉龙孟杰顾松青刘凤琴王玉
Owner CENT SOUTH UNIV
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