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Wettable cathode paste and its using method

A cathode paste and wetting technology, which is applied in the field of wettable cathode paste and its application, can solve the problems of unresolved wettability and affect the use effect of wettable cathode carbon blocks, and achieve the effect of eliminating electrolyte corrosion and prolonging life

Active Publication Date: 2004-11-17
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wettability of the joints between wettable cathode carbon blocks has not yet been resolved, and it is not yet possible to form an integral wettable cathode at the bottom of the electrolytic cell, which affects the use effect of wettable cathode carbon blocks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Calcined Anthracite 55%, TiB 2 30%, artificial graphite 5%, calcined petroleum coke 5%, metallurgical coke 5% to form a solid dry material (the particle size range is -4mm); add a viscous material composed of 70% medium-temperature coal tar pitch, 25% anthracene oil, and 5% coal tar Adhesive to make paste, wherein the ratio of adhesive to dry material is 1:4. During the construction of the electrolytic cell, the tamping temperature is 45°C, the tamping wind pressure is 0.3Mpa, the tamping compression ratio is 1.3:1, and the thickness of the tamping layer of the wettable cathode paste is 20mm.

Embodiment 2

[0016] Calcined Anthracite 35%, TiB 2 35%, artificial graphite 10%, metallurgical coke 5%, calcined petroleum coke 15% to form a solid dry material (particle size is -6mm); add a bonding agent consisting of 30% medium-temperature coal tar pitch, 40% anthracene oil, and 30% coal tar agent to make a paste, wherein the ratio of adhesive to dry material is 1:4.5. During the construction of the electrolytic cell, the tamping temperature is 20°C, the tamping wind pressure is 0.6Mpa, the tamping compression ratio is 1.6:1, and the thickness of the tamping layer of the wettable cathode paste is 15mm.

Embodiment 3

[0018] Press Electric Calcined Anthracite 10%, TiB 2 60%, 15% of artificial graphite, 5% of calcined petroleum coke, and 10% of metallurgical coke to form a solid dry material (the particle size range is -4mm); add 20% of medium-temperature coal tar pitch, 10% of anthracene oil, and 70% of coal tar The composed adhesive is made into paste, wherein the mixing ratio of adhesive and dry material is 1:5. During the construction of the electrolytic cell, the tamping temperature is 45°C, the tamping wind pressure is 0.5Mpa, the tamping compression ratio is 2.0:1, and the thickness of the tamping layer of the wettable cathode paste is 5mm.

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PUM

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Abstract

The invention relates to a cathode paste for slit connection between the moistening cathode blocks of aluminum cell and method of use, wherein the cathode paste comprises binder with 1:4-5 weight ratio and dry matter with 8mm particle size, the composition by weigh percent of the dry matter is, calcinations anthracite coal 10%-60%, calcinations petroleum coke 5%-15%, metallurgy coke 5%-30%, TiB2 15%-60%, coal pitch 20%-80% containing 5%-20% wt. percent of artificial graphite or native graphite, coal tar 5%-80%, anthracene oil 5%-40% as binder.

Description

technical field [0001] A wettable cathode paste and its application method relate to the cathode paste used for connecting gaps between wettable cathode carbon blocks of an aluminum electrolytic cell, forming a wettable cathode whole at the bottom of an aluminum electrolytic cell, and its application method. Background technique [0002] At present, the cathode carbon blocks used in aluminum electrolytic cells and the connecting paste between cathode carbon blocks are all produced from calcined anthracite, calcined petroleum coke, metallurgical coke, coal tar pitch, coal tar, and anthracene oil. These products are used in the electrolytic cell, because they cannot be well wetted with the aluminum liquid, so they often contact with the electrolyte and are corroded by the electrolyte, which affects the production operation of the electrolytic cell and affects the life of the electrolytic cell. To this end, people have developed a wettable cathode carbon block, which is made of...

Claims

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Application Information

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IPC IPC(8): C04B35/532C25C3/08
Inventor 刘凤琴罗英涛陈开斌杨宏杰苏自伟罗钟生
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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