Preparation method of flocculant capable of removing phosphate from red mud
A flocculant, red mud technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. Simple, mild reaction conditions
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[0035] Put 100kg of hydrochloric acid into the reaction kettle, pass steam to 80°C, add 25kg of bauxite, stir and react for 4 hours, then dilute to Baume density 17 (specific gravity about 1.13-1.14); then pass steam to 80°C, and add red mud at the same time Granules 70kg, stirring reaction, keep boiling for 4h. After the reaction, the brown high-efficiency phosphorus removal flocculant can be prepared by standing still for 24 hours.
[0036] Take the phosphorus removal flocculant prepared by the present invention, add it into the experimental wastewater with a phosphorus concentration of 1mg / L and 0.2mg / L, first stir it at 300rpm for 2min, then stir it at 100rpm for 30min, settle for 30min and then remove it. The supernatant was analyzed for phosphorus concentration, and the results are shown in the table below.
[0037]
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