Aluminum electrolytic cathode steel bar, preparation method and aluminum electrolytic tank

A cathode steel rod, aluminum electrolysis technology, applied in the field of aluminum electrolysis equipment, can solve the problems of cathode voltage drop, horizontal current, too high, etc., and achieve the effects of reducing horizontal current, energy consumption, and horizontal current.

Active Publication Date: 2019-05-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the cathode voltage drop and the horizontal current are too high in the production process of the aluminum electrolytic cell, the invention provides an aluminum electrolytic cathode steel rod, a preparation method and an aluminum electrolytic cell

Method used

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  • Aluminum electrolytic cathode steel bar, preparation method and aluminum electrolytic tank
  • Aluminum electrolytic cathode steel bar, preparation method and aluminum electrolytic tank
  • Aluminum electrolytic cathode steel bar, preparation method and aluminum electrolytic tank

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Embodiment 1

[0064] A novel cathode steel rod for aluminum electrolysis and a preparation method thereof, wherein the cathode steel rod is a non-through-length steel-copper alloy rod. First divide the steel-copper alloy rod rough billet with a copper content of 6wt% into two equal parts, left and right, and carry out regional melting, starting from the left end of the steel-copper alloy billet to the right end for regional melting, and controlling the melting speed For 12cm / h, carry out 2 zone melting. During the first zone smelting, the melting temperature in the melting zone was controlled at 1484°C, and the copper content in the obtained right section was 8.1wt% when smelting from the left section to the right section; during the second zone smelting, the melting zone temperature was controlled at 1439°C, Regional smelting is carried out on the left section, the copper content in the obtained left section is 4.05%, and the finished aluminum electrolysis cathode steel rod is obtained. T...

Embodiment 2

[0066] A novel cathode steel rod for aluminum electrolysis and a preparation method thereof, wherein the cathode steel rod is a non-through-length steel-copper alloy rod. First, the steel-copper alloy rod rough billet with a copper content of 6wt% is unevenly divided into left and right two sections, and regional melting is carried out from the left end of the steel-copper alloy rod rough billet to the right end, and the melting speed is controlled at 12cm / h, perform 2 zone smelting. During the first zone smelting, the melting temperature in the melting zone was controlled at 1484°C, and the copper content in the obtained right section was 8.1wt% when smelting from the left section to the right section; during the second zone smelting, the melting zone temperature was controlled at 1439°C, Regional smelting is carried out on the left section, the copper content in the obtained left section is 4.05%, and the finished aluminum electrolysis cathode steel rod is obtained. This m...

Embodiment 3

[0068] A novel aluminum electrolysis cathode steel rod and a preparation method thereof, wherein the cathode steel rod is a non-through-length steel-copper alloy rod. The steel-copper alloy rod rough billet with copper content of 6wt% is divided into figure 1 The quadrants shown, ie the first zone 1, the second zone 2, the third zone 3, and the fourth zone 4, carry out zone smelting. Melting is carried out from the end where the first section 1 of the steel-copper alloy rod rough billet is located (as the outlet end) to the other end, the melting speed is controlled at 14 cm / h, and smelting is carried out 4 times. During the first zone smelting, the smelting temperature in the melting zone was controlled at 1484°C, and the first section 1, the second section 2, the third section 3, and the fourth section 4 were sequentially smelted to obtain the fourth section 4 The copper content in the medium is 8.1wt%; during the second zone smelting, the temperature of the melting zone is...

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Abstract

The invention relates to an aluminum electrolytic cathode steel bar, a preparation method and an aluminum electrolytic tank. A steel-Me alloy is prepared into the cathode steel bar through zone melting, so that the cathode steel bar has the conductivity of different gradients, and therefore the cathode drop and horizontal current are greatly reduced. Reduction of the cathode drop is beneficial toenergy saving and consumption reducing, reduction of the horizontal current is beneficial to the stability of the electrolytic tank, and the electric energy efficiency is improved. Compared with the prior art, on one hand, the horizontal current is reduced, the cathode drop can be reduced at the same time, and the cathode structure does not need to be changed; and on the other hand, the obtained steel bar is uniform and reasonable in resistance distribution, the electroconductibility is high, and the cathode drop and the horizontal current can be obviously reduced.

Description

technical field [0001] The invention relates to an aluminum electrolysis cathode steel rod, a preparation method and an aluminum electrolysis cell, belonging to the field of aluminum electrolysis equipment. Background technique [0002] During the production process of aluminum electrolysis, the current enters the electrolytic tank from the aluminum guide rod, passes through the anode part, then passes through the electrolyte, aluminum liquid, and finally leads out from the cathode steel rod through the cathode part. When the current flows through the aluminum liquid and the cathode part, due to the different resistances of the materials, the current will automatically choose the path with the least resistance, which causes the deflection of the current, that is, the generation of horizontal current. The existence of the horizontal current will increase the vertical magnetic field, resulting in aggravated fluctuations of the aluminum liquid in the tank, increased instability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08C22C33/06
Inventor 吕晓军孙启东韩泽勋
Owner CENT SOUTH UNIV
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