Synthesis of sodium aluminate solution desilicifying additive and its use method
A synthesis method and additive technology, which are applied in the purification of aluminate/alumina/aluminum hydroxide and the preparation of alkali metal aluminate/alumina/aluminum hydroxide, etc., can solve the problem of reducing the circulation efficiency of the production process and the loss of alumina And other issues
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Embodiment 1
[0016] Synthesis of additives. In the kind of mother liquor, all the alumina in the kind of mother liquor will generate 3CaO·Al 2 o 3 ·nH 2 A theoretical amount of O was added to the lime, and the reaction was carried out for 60 minutes at a temperature of 60°C. The solid phase obtained by filtration is the additive. The chemical analysis results show that the chemical composition of the desiliconization additive is: Al 2 o 3 , 22.00%; CaO, 49.44%; SiO 2 , 1.21%; burning reduction, 27.05%. The results of phase analysis showed that the main phase components of the synthetic desiliconization additive were: hydrated garnet, 3CaO·Al 2 o 3 ·(6~10)H 2 O and a small amount of Ca(OH) 2 .
Embodiment 2
[0018] Synthesis of additives. In the kind of mother liquor, all the alumina in the kind of mother liquor will generate 3CaO·Al 2 o 3 ·nH 2 A theoretical amount of O was added to the lime, and the reaction was carried out for 10 minutes at a temperature of 105°C. The solid phase obtained by filtration is the additive. The chemical analysis results show that the chemical composition of the desiliconization additive is: Al 2 o 3 , 22.01%; CaO, 49.34%; SiO 2 , 1.21%; burning reduction, 27.04%. The results of phase analysis showed that the main phase components of the synthetic desiliconization additive were: hydrated garnet, 3CaO·Al 2 o 3 ·(6~10)H 2 O and a small amount of Ca(OH) 2 .
Embodiment 3
[0020] Synthesis of additives. The other conditions were the same as in the example, and the reaction was carried out at 40° C. for 80 minutes. The solid phase obtained by filtration is the additive.
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