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Anode steel stud for electrolytic aluminum

An anode steel claw and electrolytic aluminum technology, which is applied in the field of anode steel claw for electrolytic aluminum, can solve the problems of increased metal resistance, lattice distortion, increased heat generation, etc., and achieves improved electrical conductivity, excellent corrosion resistance, and cost savings. Effect

Inactive Publication Date: 2017-03-22
QINHUANGDAO QINYE HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, practice has proved that the use of this steel has the following defects: ordinary carbon steel will produce lattice distortion due to the presence of interstitial atoms in the iron lattice, and with the solute atoms (C, Si, Mn, S, P, Cr, The amount of Cu, Ni, Mo) dissolved increases, and the resistance of the metal gradually increases
The arrangement of atoms at the grain boundary is irregular, resulting in distortion, resulting in an increase in resistance
[0011] Although the anode steel claws are not in direct contact with the cryolite-alumina molten salt, they are still subjected to high temperature, high-temperature electrolysis flue gas and water corrosion in the aluminum electrolytic cell. After a certain period of use, the diameter of the claw head gradually erodes becomes smaller, the resistance increases, and the heat generation increases accordingly

Method used

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Experimental program
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Effect test

Embodiment 1

[0055] Cast pure iron in the following element content ranges is used as raw material to manufacture the anode steel claw of the present invention: C0.0075%, Si 0.004%, Mn 0.015%, P 0.0071%, S 0.0048%, Cr 0.0033%, Ni 0.0088% , V 0.0020%, Cu 0.0054%, Al 0.0030%, and Fe 99.81%.

[0056] After the above-mentioned cast pure iron is poured by lost foam casting technology, the impurity content of the obtained anode steel claw is as follows: C0.0065%, Si 0.006%, Mn 0.023%, P 0.0076%, S 0.0088%, Cr 0.0033%, Ni 0.0088 %, V 0.0019%, Cu 0.0059%, Al 0.0029% and Fe 99.80%, and the resistivity of the anode steel claw is 0.121 μΩ·m.

Embodiment 2

[0058] Cast pure iron in the following element content ranges is used as raw material to manufacture the anode steel claw of the present invention: C0.0095%, Si 0.0077%, Mn 0.038%, P 0.01%, S 0.0012%, Cr 0.0018%, Ni 0.01% , V0.0020%, Cu 0.0051%, Al 0.0030%, and Fe 99.83%.

[0059] After the above-mentioned cast pure iron is poured by the lost foam casting technology, the obtained anode steel claw contains the following elements: C 0.01%, Si 0.008%, Mn 0.039%, P 0.011%, S 0.013%, Cr 0.017%, Ni 0.013 %, V0.0023%, Cu 0.0048%, Al 0.0037% and Fe 99.82%, and the resistivity of the anode steel claw is 0.130μΩ·m.

Embodiment 3

[0061] Cast pure iron in the following element content ranges is used as raw material to manufacture the anode steel claw of the present invention: C0.0185%, Si 0.0045%, Mn 0.016%, P 0.011%, S 0.009%, Cr 0.0093%, Ni 0.0088% , V0.0017%, Cu 0.0034%, Al 0.0035%, and Fe 99.87%.

[0062] After the above-mentioned cast pure iron is poured by the lost foam casting technology, the obtained anode steel claw contains the following elements: C 0.02%, Si 0.005%, Mn 0.02%, P 0.012%, S 0.012%, Cr 0.01%, Ni 0.009 %, V0.0022%, Cu 0.004%, Al 0.004% and Fe 99.81%, and the resistivity of the anode steel claw is 0.129 μΩ·m.

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Abstract

The invention provides an anode steel stud for electrolytic aluminum. The anode steel stud for electrolytic aluminum comprises following elements including less than 0.02% of C, less than 0.008% of Si, less than 0.039% of Mn, less than 0.012% of P, less than 0.013% of S, less than 0.029% of Cr, less than 0.013% of Ni, less than 0.0023% of V, less than 0.0059% of Cu, less than 0.0044% of Al and more than 97.50% of Fe. The anode steel stud is made of casting pure iron, conduction performance and corrosion resistance of the anode steel stud can be improved, the whole pressure drop of an anode electrode is reduced in the use process, electric energy is saved, and the service life of the steel stud is prolonged.

Description

technical field [0001] The invention relates to the technical field of electrolytic aluminum equipment, and more particularly relates to an anode steel claw for electrolytic aluminum. Background technique [0002] China is the world's largest producer of electrolytic aluminum. In 2015, the output of electrolytic aluminum in China was 31.11 million tons, accounting for about 50% of the global output. China's electrolytic aluminum output is mainly concentrated in Xinjiang, Henan, Inner Mongolia, Qinghai, Shandong, Gansu and other energy-rich provinces. The electrolytic aluminum industry is a big energy consumer, and the cost of electricity accounts for 40% of the cost of aluminum production. Therefore, energy saving is the main improvement trend of the electrolytic aluminum industry. [0003] The main process of electrolytic aluminum production is to use the principle of electrolytic reaction, use carbon as anode and cathode in the electrolytic cell, and DC electrolyze the c...

Claims

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Application Information

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IPC IPC(8): C25C3/12
CPCC25C3/12
Inventor 陈晓光王健
Owner QINHUANGDAO QINYE HEAVY IND