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A kind of preparation method of electrolytic aluminum anode steel claw protection semi-ring

A technology of electrolytic aluminum anode and steel claw is applied in the field of electrolytic aluminum to achieve the effect of reducing cost, reducing processing cost and maintaining stable quality

Active Publication Date: 2020-02-07
重庆国丰实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art and provide a method for preparing the protective half ring of the electrolytic aluminum anode steel claw. By using the carbon slag produced by the electrolytic cell as a raw material, it is mixed with coal tar pitch and then extruded to obtain the protective ring. It not only recycles the waste slag produced by the aluminum electrolytic cell, but also avoids environmental pollution problems. The quality of the prepared protective half-ring is stable and easy to install, which can effectively protect the steel claw. The protective half-ring is ablated during use, releasing electrolyte and fluoride. Salt, can also replenish electrolyte fluid

Method used

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  • A kind of preparation method of electrolytic aluminum anode steel claw protection semi-ring
  • A kind of preparation method of electrolytic aluminum anode steel claw protection semi-ring
  • A kind of preparation method of electrolytic aluminum anode steel claw protection semi-ring

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Effect test

Embodiment 1

[0038] Manually fish out the floating carbon residue on the surface of the electrolyte solution in the 320kA electrolytic cell. The carbon residue is composed of 50wt% anode residue, 40wt% electrolyte, and 10wt% fluoride salt. Among them, the anode residue is the anode carbon body in the electrolysis process , Oxidation due to quality problems and carbon particles falling off into the electrolyte solution, fluoride salt is an additive in the electrolyte solution, specifically CaF 2 , MgF 2 mixture. After the salvaged carbon slag is cooled into a block, the block-shaped carbon slag is put into a pulverizer and pulverized into granular raw materials with a diameter of 0.5-2.0mm. Mix the granular raw material and coal tar pitch into the heating mixer. Coal tar pitch is high-temperature pitch, and the mass ratio of coal tar pitch: granular raw material is 15:100. Heat to 95-100°C to melt the coal tar pitch and stir for 1 hour to obtain extrusion raw materials. .

[0039] Get 1....

Embodiment 2

[0041] Manually fish out the floating carbon residue on the surface of the electrolyte solution of the 320kA electrolytic cell. The carbon residue is composed of 50wt% anode residue, 40wt% electrolyte, and 10wt% fluoride salt. The fluoride salt is MgF 2 single component. After the salvaged carbon slag is cooled into a block, the block-shaped carbon slag is put into a pulverizer and pulverized into granular raw materials with a diameter of 0.5-2.0mm. Mix the granular raw material and coal tar pitch into the heating mixer. Coal tar pitch is high-temperature pitch, and the mass ratio of coal tar pitch: granular raw material is 15:100. Heat to 95-100°C to melt the coal tar pitch and stir for 1 hour to obtain extrusion raw materials. .

[0042] Adjust the limit nuts on the upper and lower sides of the limit plate and the limit nuts on the upper and lower sides of the installation plate until the depth of the movable lower core extending into the through hole is 30mm, and the depth...

Embodiment 3

[0044] see Figure 15 , taking the installation of the two protective half-rings in Embodiment 1 on the anode steel claw as an example. The anode steel claws 16 are arranged vertically, and the inner arc surfaces of the two protective semi-rings 17 are closely attached to the circumferential surface of the anode steel claws, which are located at the joint position of the phosphorus iron ring and the anode carbon body, and are bound together with aluminum wires to form a ring. protection ring. A 350mm thick electrolyte block fabric is laid on the upper end surface of the protective ring. After being loaded into the electrolytic cell, the coal tar pitch in the protective half-ring is remelted and carbonized, and then bonded between the two protective half-rings, and the two protective half-rings are bonded to form an inner diameter of 150mm, an outer diameter of 250mm, and a height of 50mm. Full protection ring. In the first 30 days of the anode consumption cycle, the protect...

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Abstract

The invention relates to a preparation method of an electrolytic-aluminum anode steel-claw protection half ring. The preparation method includes the following steps: 1) taking out carbon residues on the surface of electrolyte liquid in an electrolytic cell, cooling the carbon residues into blocks, and pulverizing the blocks into a granular raw material with the diameter of 0.5-2.0mm; 2) mixing thegranular raw material with coal pitch, heating to 95-100 DEG C to enable the coal pitch to melt, and evenly stirring the mixture to obtain an extrusion raw material, wherein the mass ratio of the coal pitch to the granular raw material is 15:100; 3) putting the extrusion raw material into an extrusion die, and performing extrusion and cooling forming to obtain the protection half ring with a semicircular cross section. The preparation method has the advantages that the carbon residues produced by the electrolytic cell are taken as raw materials, and are mixed with the coal pitch before extrusion forming to obtain the protection ring, so that waste residues produced by the aluminum electrolytic cell are recycled, and the environmental pollution problems are avoided; the prepared protectionhalf ring has stable quality and is convenient to mount, steel claws can be protected effectively, and the protection half ring can be protected from erosion during use; electrolytes and fluoride salt can be released, and the electrolyte liquid can be supplemented.

Description

technical field [0001] The invention relates to the field of electrolytic aluminum, in particular to a method for preparing an electrolytic aluminum anode steel claw protection semi-ring. Background technique [0002] At present, the steel claw diameter of the anode used in the 240kA aluminum electrolytic cell is 140mm, the diameter of the phosphorus iron ring is 215mm, the service life of the anode of the aluminum electrolytic cell is 33 days, and the anode is consumed from a height of 620mm to a thickness of only about 150mm after 33 days. Since the height of the electrolyte solution in the electrolytic cell is controlled at 170-190mm and the temperature is 930-940°C, when the anode is consumed for 30 days, the height of the anode will reach 192mm. "Phenomenon, the iron content in the electrolyte increases, which affects the grade of primary aluminum and increases the production cost. Therefore, in the production process of electrolytic aluminum, an anode protection ring ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B3/26
CPCB28B3/26
Inventor 钟涛吴正伟蒋卫民潘远明欧阳小勇
Owner 重庆国丰实业有限公司