Method for preparing polysilicate ferro-aluminum sulfate composite flocculant from red mud waste
A technology of polysilicon aluminum ferric sulfate and composite flocculant, which is applied in the fields of ferric sulfate, chemical instruments and methods, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of complex preparation process and high cost, and achieve simple process and low production cost Low, low residual aluminum content effect
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Embodiment 1
[0054] The method for preparing the polysilicon-aluminum-ferric-sulfate composite flocculant using red mud waste in this embodiment comprises the following steps:
[0055] (1) Put the red mud waste containing silicon, aluminum and iron and the activator sodium carbonate in a muffle furnace for calcination, the calcination temperature is 550°C, and the calcination time is 4.5h; then the red mud waste is ground and passed through 300 Mesh sieve to obtain activated red mud powder with a particle size of 48 μm; the quality of the activator sodium carbonate is 2% of the red mud waste quality;
[0056] (2) Put the activated red mud powder into a sulfuric acid solution with a mass fraction of 80% for reaction, add hydrogen peroxide to increase the leaching rate, the amount of hydrogen peroxide is 0.2% of the mass of red mud waste, the reaction temperature is 90°C, and the reaction time is 1.5h, The solid-to-liquid ratio is 8ml / g;
[0057] (3) Add calcium oxide and aluminum silicate ...
Embodiment 2
[0060] The method for preparing the polysilicon-aluminum-ferric-sulfate composite flocculant using red mud waste in this embodiment comprises the following steps:
[0061] (1) Put the red mud waste containing silicon, aluminum and iron and the activator sodium fluoride in a muffle furnace for calcination, the calcination temperature is 550°C, and the calcination time is 4.5h; 300 mesh sieves to obtain activated red mud powder with a particle size of 48 μm; the quality of the activator sodium fluoride is 2% of the red mud waste mass;
[0062] (2) Put the activated red mud powder into a sulfuric acid solution with a mass fraction of 80% for reaction, add hydrogen peroxide to increase the leaching rate, the amount of hydrogen peroxide is 0.2% of the mass of red mud waste, the reaction temperature is 90°C, and the reaction time is 1.5h, The solid-to-liquid ratio is 8ml / g;
[0063] (3) Add calcium oxide and aluminum silicate to the solution of step (2), adjust the molar ratio of F...
Embodiment 3
[0066] The method for preparing the polysilicon-aluminum-ferric-sulfate composite flocculant using red mud waste in this embodiment comprises the following steps:
[0067](1) Put the red mud waste containing silicon, aluminum and iron and the activator sodium fluoride in a muffle furnace for calcination, the calcination temperature is 550°C, and the calcination time is 4.5h; 300 mesh sieves to obtain activated red mud powder with a particle size of 48 μm; the quality of the activator sodium fluoride is 3% of the red mud waste mass;
[0068] (2) Put the activated red mud powder into a sulfuric acid solution with a mass fraction of 80% for reaction, add hydrogen peroxide to increase the leaching rate, the amount of hydrogen peroxide is 0.2% of the mass of red mud waste, the reaction temperature is 90°C, and the reaction time is 1.5h, The solid-to-liquid ratio is 8ml / g;
[0069] (3) Add calcium oxide and aluminum silicate to the solution of step (2), and adjust the molar ratio o...
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