Method for recovering aluminum hydroxide and sodium hydroxide from liquid waste of aluminum industry alkali waste
A technology of aluminum hydroxide and sodium hydroxide, applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, alkali metal hydroxide, etc., can solve the problems of loss of sulfuric acid, insufficient disposal capacity, environmental hazards, etc., Achieve the effect of reducing the generation of aluminum scale, reducing the frequency of maintenance, and restoring production capacity
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Embodiment 1
[0095] Embodiment 1: get free alkali 110g / L, Al 3+ 20g / L waste liquid, R=free alkali concentration / Al 3+ Concentration = 5.50, the bath does not decompose, no aluminum hydroxide is precipitated;
Embodiment 2
[0096] Embodiment 2: get free alkali 121g / L, Al 3+ 34g / L waste liquid, R=free alkali concentration / Al 3+ Concentration = 4.0, the bath does not decompose, no aluminum hydroxide is precipitated;
Embodiment 3
[0097] Embodiment 3: get free alkali 121g / L, Al 3+ 34g / L waste liquid, R=free alkali concentration / Al 3+ Concentration = 3.56, bath does not decompose, no aluminum hydroxide precipitates;
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