Method for preparing calcium sulfate nanospheres from industrial solid waste gypsum
A technology of industrial solid waste and calcium sulfate, applied in the direction of nanotechnology, nanotechnology, calcium/strontium/barium sulfate, etc., can solve the problems of high cost, no industrial production value, and high production cost
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Embodiment 1
[0028] The phosphogypsum is dried, crushed, ground, and sieved to obtain a dry material with a particle size of less than 100 mesh, and then the dry material is mixed with ammonium acetate solution at a solid-to-liquid ratio (kg / L) of 1:100. The concentration of ammonium acetate solution is 2 mol / L. Then the mixture was stirred (300 r / min), heated, and the insoluble matter was filtered off after the temperature of the mixture rose to 70 °C to obtain filtrate A, and the filter residue was sintered into a glass building material. Then take a certain amount of 2 g / L ethanol solution of stearic acid according to the volume ratio of liquid A and ethanol solution of stearic acid as 1:20, and press the volume ratio of cyclohexane and stearic acid ethanol solution to be 1:12 Take a certain amount of cyclohexane, and finally mix the two to get liquid B. Then slowly add liquid A into liquid B, heat and stir at 70 °C and 300 r / min until clear to obtain liquid C. Then transfer liquid C ...
Embodiment 2
[0030] The phosphogypsum is dried, crushed, ground, and sieved to obtain a dry material with a particle size of less than 100 mesh, and then the dry material is mixed with ammonium chloride solution at a solid-to-liquid ratio (kg / L) of 1:90. The concentration of the ammonium chloride solution is 2 mol / L. Then the mixture was stirred (300 r / min), heated, and the insoluble matter was filtered off after the temperature of the mixture rose to 90°C to obtain filtrate A, and the filter residue was sintered into a glass building material. Then take a certain amount of 2 g / L ethanol solution of stearic acid according to the volume ratio of liquid A and stearic acid ethanol solution of 1:20, and press the volume ratio of n-heptane and stearic acid ethanol solution to be 1:12 Take a certain amount of n-heptane, and finally mix the two to get liquid B. Then slowly add liquid A into liquid B, heat and stir at 70°C and 300 r / min until clear to obtain liquid C. Then transfer liquid C into...
Embodiment 3
[0032]The phosphogypsum is dried, crushed, ground, and sieved to obtain a dry material with a particle size of less than 100 mesh, and then the dry material is mixed with ammonium sulfate solution at a solid-to-liquid ratio (kg / L) of 1:90. The concentration of the ammonium sulfate solution is 2 mol / L. Then the mixture was stirred (300 r / min) and heated, and the insoluble matter was filtered off after the temperature of the mixture rose to 90 °C to obtain filtrate A, and the filter residue was sintered into a glass building material. Then take a certain amount of 2 g / L stearic acid ethanol solution according to the volume ratio of A liquid and stearic acid ethanol solution as 1:20, and mix it with the ethanol solution of cyclohexane, n-heptane and stearic acid Take a certain amount of cyclohexane and n-heptane at a volume ratio of 1:1:24, and finally mix the three to obtain liquid B. Then slowly add liquid A into liquid B, heat and stir at 70 °C and 300 r / min until clear to ob...
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