Compact zircon brick and preparation method thereof
A zircon brick and zircon technology, which is applied in the field of dense zircon brick and its preparation, can solve the problems of excessive copper or iron content, impurity that cannot meet the requirements of special glass, can not meet the requirements of special glass, etc. The effect of low impurity content and improved gain performance
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Embodiment 1
[0028] A dense zircon brick comprising the following components by weight:
[0029]
[0030] Among them, the average particle diameter of quartz powder D50=6.81 μm, the average particle diameter of zirconia powder D50=6.50 μm, additives include titanium oxide, yttrium oxide, lanthanum oxide, cerium oxide, silica sol or water glass, additives also include water reducing agent.
[0031] The preparation method of the above-mentioned dense zircon bricks comprises the following steps:
[0032] S1: Calcining the purchased high-purity quartz sand and high-purity zirconia respectively to obtain calcined quartz sand and calcined zirconia, the SiO in the high-purity quartz sand 2 The content of ≥99.5%, ZrO in high-purity zirconia 2 The content of ≥99.5%.
[0033] S2: The calcined quartz sand and calcined zirconia are pulverized by ball milling respectively to obtain quartz mud and zirconia mud.
[0034] S3: drying the quartz mud and the zirconia mud respectively by microwave to o...
Embodiment 2
[0044] A dense zircon brick comprising the following components by weight:
[0045]
[0046] Among them, the average particle size D50 of quartz powder = 5.50 μm, the average particle size D50 of zirconia powder = 4.23 μm, additives include titanium oxide, yttrium oxide, lanthanum oxide, cerium oxide, silica sol or water glass, and additives include water reducing agent.
[0047] The preparation method of the above-mentioned dense zircon bricks is consistent with that of Example 1.
[0048] Wherein, the calcination temperature in step S1 is 1360-1400°C. In step S6, the calcination temperature is 1350°C-1650°C, and the calcination holding time is not less than 9h; in step S9, the high-temperature sintering temperature is 1580°C-1680°C, and the calcination holding time is not less than 12h. The moisture content of the drying material in steps S3, S5 and S7 is ≤0.4%, and the powder in steps S3, S5 and S7 needs to pass through a 30-mesh sieve.
Embodiment 3
[0050] A dense zircon brick comprising the following components by weight:
[0051]
[0052] Among them, the average particle size D50 of quartz powder = 5.20 μm, the average particle size D50 of zirconia powder = 4.10 μm, additives include titanium oxide, yttrium oxide, lanthanum oxide, cerium oxide, silica sol or water glass, additives also include water reducing agent.
[0053] The preparation method of the above-mentioned dense zircon bricks is consistent with that of Example 1.
[0054] Wherein, the calcination temperature in step S1 is 1360-1400°C. In step S6, the calcination temperature is 1350°C-1650°C, and the calcination holding time is not less than 9h; in step S9, the high-temperature sintering temperature is 1580°C-1680°C, and the calcination holding time is not less than 12h. The moisture content of the drying material in steps S3, S5 and S7 is ≤0.4%, and the powder in steps S3, S5 and S7 needs to pass through a 30-mesh sieve.
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