Composite spinel material for insulation of side wall of aluminium electrolysis cell and preparation method thereof
An aluminum electrolytic cell and spinel technology, which is applied in the field of composite spinel materials for thermal insulation of aluminum electrolytic cell sidewalls and its preparation, can solve the problem of poor oxidation resistance and electrolyte corrosion resistance, poor oxidation resistance, and sidewall insulation. Material damage and other problems, to achieve excellent corrosion resistance, improve grain boundary stability, and promote the effect of aggregate densification
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Embodiment 1
[0031] A composite spinel material for heat preservation of the side wall of an aluminum electrolytic cell and a preparation method thereof. The preparation method described in this embodiment is:
[0032] First, 65-68wt% granular material, 17-20wt% iron oxide fine powder, 5-8wt% zinc oxide fine powder and 8-10wt% α-Al 2 o 3 The fine powder is a mixture, and then add 0.5-1.0wt% manganese monoxide fine powder and 2.5-3.5wt% polyvinyl alcohol to the mixture, stir evenly, shape, and dry; then keep warm at 1350-1400°C After 2-4 hours, the composite spinel material for thermal insulation of the side wall of the aluminum electrolytic cell is obtained.
[0033]The preparation method of the granular material is as follows: 55-59wt% iron oxide fine powder and 41-45wt% zinc oxide fine powder are used as raw materials, and 0.5-1.0wt% vanadium pentoxide fine powder and 2.0 wt% of the raw materials are added. ~3.0wt% polyvinyl alcohol, mixed evenly, pressed and molded, dried, kept at 13...
Embodiment 2
[0036] A composite spinel material for heat preservation of the side wall of an aluminum electrolytic cell and a preparation method thereof. The preparation method described in this embodiment is:
[0037] First, 67-70wt% granular material, 15-18wt% iron oxide fine powder, 6-9wt% zinc oxide fine powder and 7-9wt% α-Al 2 o 3 The fine powder is a mixture, and then add 0.9-1.4wt% manganese monoxide fine powder and 3.4-4.4wt% polyvinyl alcohol to the mixture, stir evenly, shape, and dry; then keep warm at 1380-1430°C After 3-5 hours, the composite spinel material for the side wall insulation of the aluminum electrolytic cell is obtained.
[0038] The preparation method of the granular material is as follows: 57-61wt% iron oxide fine powder and 39-43wt% zinc oxide fine powder are used as raw materials, and 0.9-1.4wt% vanadium pentoxide fine powder and 2.9 ~3.9wt% polyvinyl alcohol, mixed uniformly, pressed into shape, dried, kept at 1330-1380°C for 3-5 hours, cooled in a furnace...
Embodiment 3
[0041] A composite spinel material for heat preservation of the side wall of an aluminum electrolytic cell and a preparation method thereof. The preparation method described in this embodiment is:
[0042] First, 69-72wt% of granular material, 13-16wt% of iron oxide fine powder, 7-10wt% of zinc oxide fine powder and 6-8wt% of α-Al 2 o 3 The fine powder is a mixture, and then add 1.3-1.8wt% manganese monoxide fine powder and 4.3-5.3wt% polyvinyl alcohol to the mixture, stir evenly, shape, and dry; then keep warm at 1410-1460°C After 4-6 hours, the composite spinel material for the side wall insulation of the aluminum electrolytic cell is obtained.
[0043] The preparation method of the granular material is as follows: 59-63wt% iron oxide fine powder and 37-41wt% zinc oxide fine powder are used as raw materials, and 1.3-1.8wt% vanadium pentoxide fine powder and 3.8 ~4.8wt% polyvinyl alcohol, mixed uniformly, pressed into shape, dried, kept at 1360-1410°C for 4-6 hours, cooled...
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