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A kind of anti-oxidation coating of electrolytic aluminum prebaked anode and preparation method thereof

A technology of anti-oxidation coating and pre-baked anode, applied in coating and other directions, can solve the problems of short service life and high iron content, and achieve the effect of preventing oxidation peeling, stable properties, and reducing gross and net consumption.

Active Publication Date: 2019-04-09
湖南博溥立材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating is a low-temperature slurry, which can solve the problems of short service life and high iron content in aluminum liquid in the aluminum electrolytic production process

Method used

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  • A kind of anti-oxidation coating of electrolytic aluminum prebaked anode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1000kg of electrolytic aluminum prebaked anodic anti-oxidation coating, its components are:

[0028] Ceramic-based continuous phase: composed of α-Al2O3 and γ-Al2O3, accounting for 35% of the total mass of the coating, a total of 350kg, of which α-Al2O3 accounts for 90% of the ceramic-based continuous phase, which is 315kg; 10% of the continuous phase, that is 35kg;

[0029] Ceramic-based continuous catalytic phase: composed of mica powder, potassium feldspar powder, and rare earth concentrate brown yttrium-niobium ore, accounting for 30% of the total mass of the coating, that is, 300kg, of which the amount of mica powder is 40% of the ceramic-based continuous catalytic phase, that is, 120kg , the amount of potassium feldspar powder is 59.67% of the ceramic-based continuous catalytic phase, about 179kg, and the amount of rare earth concentrate brown yttrium-niobium ore is 0.33% of the ceramic-based continuous catalytic phase, about 1kg;

[0030] Alkali and alkaline ear...

Embodiment 2

[0042] 1000kg of electrolytic aluminum prebaked anodic anti-oxidation coating, its components are:

[0043] Ceramic-based continuous phase: composed of α-Al2O3 and γ-Al2O3, accounting for 40% of the total mass of the coating, a total of 400kg, of which 1000 mesh α-Al2O3 accounts for 85% of the ceramic-based continuous phase, which is 340kg; 325 mesh γ-Al2O3 It accounts for 15% of the continuous phase of the ceramic base, that is, 60kg;

[0044] Ceramic-based continuous catalytic phase: composed of mica powder, potassium feldspar powder, and rare earth concentrate brown yttrium-niobium ore, accounting for 20% of the total mass of the coating, that is, 200kg, of which the amount of mica powder is 55% of the ceramic-based continuous catalytic phase, that is, 110kg , the amount of potassium feldspar powder is 44.67% of the ceramic-based continuous catalytic phase, about 89.34kg, and the amount of rare earth concentrate brown yttrium-niobium ore is 0.33% of the ceramic-based contin...

Embodiment 3

[0057] 1000kg of electrolytic aluminum prebaked anodic anti-oxidation coating, its components are:

[0058] Ceramic-based continuous phase: composed of α-Al2O3 and γ-Al2O3, accounting for 25% of the total mass of the coating, a total of 250kg, of which 1000 mesh α-Al2O3 accounts for 100% of the ceramic-based continuous phase, which is 250kg; 325 mesh γ-Al2O3 It accounts for 0% of the continuous phase of the ceramic base, that is, 0kg;

[0059] Ceramic-based continuous catalytic phase: composed of mica powder, potassium feldspar powder, and rare earth concentrate brown yttrium-niobium ore, accounting for 40% of the total mass of the coating, that is, 400kg, of which the amount of mica powder is 50% of the ceramic-based continuous catalytic phase, that is, 200kg , the amount of potassium feldspar powder is 49.67% of the ceramic-based continuous catalytic phase, about 198.68kg, and the amount of rare earth concentrate brown yttrium-niobium ore is 0.33% of the ceramic-based contin...

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Abstract

The invention discloses electrolytic aluminum prebaked anode anti-oxidation paint and a preparation method thereof, and belongs to the field of anode anti-oxidation paint. The prepared anti-oxidation paint is synthesized by a ceramic base continuous phase, a ceramic base continuous catalysis phase, an alkali and alkaline earth metal auxiliary catalyst phrase, a ceramic base reinforcing phase, a stabilizing phase, a film forming phrase and a water phrase; the prepared anti-oxidation paint is water-based viscous fluid and is mutually soluble with water; the property is stable; no harm is caused on a human body; strong adhesive force is formed on the anode surface; the anti-oxidation paint can be sintered at 500 DEG C to become compact; a compact ceramic-based sealing layer is formed on the surface of a carbon anode; carbon dioxide, oxygen gas and air are isolated; the oxidative exfoliation of the outer surface of the carbon anode is prevented; further, the rough loss and the net loss of the carbon anode are reduced, so that the anode change period is prolonged for 1 to 2 days.

Description

technical field [0001] The invention discloses an electrolytic aluminum prebaked anode anti-oxidation coating and a preparation method thereof, belonging to the field of anodic anti-oxidation coatings. Background technique [0002] The main raw materials of carbon anodes are petroleum coke, pitch and anode scraps. In the current aluminum electrolysis process, it is difficult to completely isolate the contact between the anode and the air, let alone the contact between the side of the carbon anode and CO2, and the side of the anode is exposed to CO2. The redox reaction between the anode and the oxidizing gas and the Budor reaction in contact with CO2 cause excessive consumption of the carbon anode. The theoretical carbon consumption for producing one ton of aluminum is 333.3kg, and the net consumption of the world’s advanced anode reaches 400kg / t-Al. Especially in the selective oxidation between asphalt, petroleum coke, and broken anode material, the rapid oxidation of asph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D101/28C09D7/61C25C3/12
CPCC08K3/22C08K3/34C08K3/346C08K13/06C08K2003/221C08K2003/2227C08K2201/014C09D7/61C09D101/28C25C3/125
Inventor 王博一
Owner 湖南博溥立材料科技有限公司
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