Method for preparing high-strength α-titanium gypsum from industrial waste titanium dioxide waste residue
A technology of industrial waste and titanium dioxide, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems affecting the crystallization process of high-strength α-titanium gypsum, the small crystal size of the product, and the low purity of dihydrate gypsum, so as to promote High-value and high-volume comprehensive utilization, excellent product quality, and low cost effects
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Embodiment 1
[0037] The method for preparing high-strength α-titanium gypsum by using industrial waste titanium dioxide waste slag of the present invention, the specific steps are as follows:
[0038] The titanium dioxide waste residue used is produced by the acid method and contains a certain amount of Fe after being treated with calcium hydroxide. 2 o 3 Impurities and a large amount of free water, the appearance is dark red and very viscous solid waste.
[0039] (1) Add water to the titanium dioxide waste residue that has been ground to a particle size of less than 270 meshes to prepare a slurry with a concentration of 10% by mass.
[0040](2) Add a composite nucleating agent to the slurry prepared in step (1), the composite nucleating agent is compounded by nucleating agent A and nucleating agent B in a weight ratio of 1:1, and the composite nucleating agent is formed The addition amount of the nucleating agent is 0.5% of the weight of the titanium dioxide waste residue, the nucleatin...
Embodiment 2
[0046] The method for preparing high-strength α-titanium gypsum by using industrial waste titanium dioxide waste slag of the present invention, the specific steps are as follows:
[0047] The titanium dioxide waste residue used is produced by the acid method and contains a certain amount of Fe after being treated with calcium hydroxide. 2 o 3 Impurities and a large amount of free water, the appearance is dark red and very viscous solid waste.
[0048] (1) Add water to the titanium dioxide waste residue that has been ground to a particle size of less than 270 meshes to prepare a slurry with a concentration of 50% by mass.
[0049] (2) Add a composite nucleating agent to the slurry prepared in step (1), the composite nucleating agent is compounded by nucleating agent A and nucleating agent B in a weight ratio of 1:10, and the composite nucleating agent is formed The addition amount of the nucleating agent is 3.0% of the weight of the titanium dioxide waste residue, the nucleat...
Embodiment 3
[0055] The method for preparing high-strength α-titanium gypsum by using industrial waste titanium dioxide waste slag of the present invention, the specific steps are as follows:
[0056] The titanium dioxide waste residue used is produced by the acid method and contains a certain amount of Fe after being treated with calcium hydroxide. 2 o 3 Impurities and a large amount of free water, the appearance is dark red and very viscous solid waste.
[0057] (1) Add water to the titanium dioxide waste slag that has been ground to a particle size of less than 270 meshes to prepare a slurry with a concentration of 30% by mass.
[0058] (2) Add a composite nucleating agent to the slurry prepared in step (1), the composite nucleating agent is compounded by nucleating agent A and nucleating agent B in a weight ratio of 1:5, and the composite nucleating agent is formed The addition amount of the nucleating agent is 1.0% of the weight of the titanium dioxide waste residue, the nucleating ...
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