Anticorrosive high-temperature coating for aluminum electrolysis cell graphite anode steel claw
A graphite anode, aluminum electrolytic cell technology, applied in the coating and other directions, to achieve the effect of prolonging the service life and replacement cycle, and improving the resistance to hydrogen fluoride corrosion and high temperature oxidation corrosion
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Embodiment 1
[0014] An anti-corrosion high-temperature coating for graphite anode steel claws of an aluminum electrolytic cell, which comprises the following raw materials prepared in parts by weight: 15 white corundum, 5 quartz, 1 magnesium oxide, 1 calcium oxide, 1 iron oxide, and 15 zirconia powder.
[0015] It also includes inorganic high temperature binders.
[0016] The inorganic high-temperature binder is an aqueous solution of sodium silicate. The weight of the aqueous solution of sodium silicate is 50% of the total weight of the above raw materials.
[0017] Mix and stir with inorganic high-temperature binder evenly, and then apply it on the steel substrate. After 5-7 hours, it is naturally dried at room temperature, and the temperature is raised to 900°C at a rate of 10°C per minute.
Embodiment 2
[0019] An anti-corrosion high-temperature coating for graphite anode steel claws of an aluminum electrolytic cell, which comprises the following raw materials prepared in parts by weight: white corundum 50, quartz 80, magnesium oxide 10, calcium oxide 10, iron oxide 20, zirconia powder 50, dispersed Agent 5.
[0020] It also includes inorganic high temperature binders.
[0021] The dispersant is one or more of pyrophosphate, polyacrylamide or sodium tripolyphosphate. The inorganic high-temperature binder is an aqueous solution of sodium silicate. The weight of the aqueous solution of sodium silicate is 45% of the total weight of the above raw materials.
[0022] Mix and stir with inorganic high-temperature binder evenly, and then apply it on the steel substrate. After 5-7 hours, it is naturally dried at room temperature, and the temperature is raised to 900°C at a rate of 10°C per minute.
Embodiment 3
[0024] An anti-corrosion high-temperature coating for graphite anode steel claws of an aluminum electrolytic cell, which comprises the following raw materials prepared in parts by weight: white corundum 30, quartz 40, magnesium oxide 5, calcium oxide 5, iron oxide 10, zirconia powder 30, dispersed Agent 2.
[0025] It also includes inorganic high temperature binders.
[0026] The dispersant is one or more of pyrophosphate, polyacrylamide or sodium tripolyphosphate. The inorganic high-temperature binder is an aqueous solution of sodium silicate. The weight of the aqueous solution of sodium silicate is 40% of the total weight of the above raw materials.
[0027] Mix and stir with inorganic high-temperature binder evenly, and then apply it on the steel substrate. After 5-7 hours, it is naturally dried at room temperature, and the temperature is raised to 900°C at a rate of 10°C per minute.
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