Method for treating rutile titanium dioxide waste water
A technology for rutile titanium dioxide and waste water, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems of no economic benefit, large energy consumption, and affecting absorption effect, etc. , achieve significant economic and environmental benefits, and improve recycling efficiency
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[0023] Example 1:
[0024] 10m 3 Transfer acidic wastewater into the mixing tank, turn on the stirring, and slowly add 6m 3 -7m 3 For alkaline wastewater, control the mixing temperature at 50-60℃, stop stirring after 10-15min, the pH of the mixed liquid is between 7-8, after 60min of natural settlement, the supernatant liquid is transferred to the thickener, and the polypropylene with a concentration of 200ppm The amide was added to it at a concentration ratio of 5ppm, mixed and stirred for 30 minutes, settled for 60 minutes, and the lower layer precipitate (mainly containing TiO 2 155kg), the precipitate is returned to the alkali solution storage tank in the preparation process of calcined seed crystals to continue pressure filtration. The upper neutral water contains sulfate ions and sodium ions, which are adsorbed by activated carbon to remove ions and used for titanium dioxide production.
[0025] The lower sediment mixed with acidic wastewater and alkaline wastewater is transfe...
Example Embodiment
[0026] Example 2:
[0027] Will be 20m 3 Transfer acidic wastewater into the mixing tank, turn on the stirring, and slowly add 11m 3 -14m 3 For alkaline wastewater, control the mixing temperature at 50-60℃, stop stirring after 10-15min, the pH of the mixed liquid is between 7-8, after 60min of natural settlement, the supernatant liquid is transferred to the thickener, and the polypropylene with a concentration of 200ppm The amide was added to it at a concentration ratio of 10 ppm, mixed and stirred for 30 minutes, settled for 60 minutes, and the lower layer precipitate (mainly containing TiO 2 286kg), the precipitate is returned to the alkali solution storage tank in the preparation process of calcined seed crystals to continue pressure filtration. The upper neutral water contains sulfate ions and sodium ions, which are adsorbed and removed by activated carbon and used for titanium dioxide production.
[0028] The lower sediment mixed with acidic wastewater and alkaline wastewater i...
Example Embodiment
[0029] Example 3:
[0030] 25m 3 Transfer acidic wastewater into the mixing tank, turn on the stirring, and slowly add 15m 3 -17m 3 For alkaline wastewater, control the mixing temperature at 50-60℃, stop stirring after 10-15min, the pH of the mixed liquid is between 7-8, after 60min of natural settlement, the supernatant liquid is transferred to the thickener, and the polypropylene with a concentration of 200ppm The amide was added to it at a concentration ratio of 8ppm, mixed and stirred for 30 minutes, and settled for 60 minutes to obtain the lower layer precipitation (mainly containing TiO 2 341kg), the precipitate is returned to the alkali solution storage tank in the preparation process of calcined seed crystals to continue pressure filtration. The upper neutral water contains sulfate ions and sodium ions, which are adsorbed and removed by activated carbon for use in titanium dioxide production.
[0031] The lower sediment mixed with acidic wastewater and alkaline wastewater is...
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