Method for grading treatment of manganese-containing waste acid
A treatment method and technology of acid solution, applied in water/sewage multi-stage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of little contribution to market competitiveness, lower enterprise costs, and no real resources Grading collection, recycling and other issues
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Embodiment 1
[0060] Classification treatment method of manganese-containing waste acid:
[0061] (1) Select 111g of magnesium oxide with a purity of 85%, and slowly add it into 200g of water under stirring conditions.
[0062] (2) Slowly add 520 g of manganese-containing waste acid into the solution of process (1), measure the pH of the solution while adding, and control the pH of the reaction solution to be 8.
[0063] (3) Heat up to 80°C and react for 1 hour.
[0064] (4) After 1 hour of reaction, add water to adjust the solution density to 1.38kg / m 3 , and control the temperature of the filtrate at the same time, after the temperature returns to 80°C, filter and press filter.
[0065] (5) Place the filtrate at 30° C., stir at constant temperature for 10 h, filter, and dry to obtain magnesium sulfate crystals.
[0066] (6) After the filter residue obtained in step (4) is washed with water for 4 times, manganese enrichment (manganese dioxide) can be obtained.
Embodiment 2
[0068] Classification treatment method of manganese-containing waste acid:
[0069] (1) Select 111 g of magnesium oxide with a purity of 90%, and slowly add it to 200 g of water under stirring.
[0070] (2) Slowly add 520 g of manganese-containing waste acid into the process (1), measure the pH of the solution while adding, and control the pH of the reaction solution to be 8.
[0071] (3) Heat up to 80°C and react for 1 hour.
[0072] (4) After reacting for 1 hour, filter while hot at a constant temperature at 80° C. or press filter while hot.
[0073] (5) Place the filtrate at 30° C., stir at constant temperature for 10 h, filter, and dry to obtain magnesium sulfate crystals.
[0074] (6) After the filter residue obtained in step (4) is washed with water for 4 times, manganese enrichment (manganese dioxide) can be obtained.
Embodiment 3
[0076] Classification treatment method of manganese-containing waste acid:
[0077] (1) Select 111 g of magnesium oxide with a purity of 90%, and slowly add it to 200 g of water under stirring.
[0078] (2) Slowly add 520 g of manganese-containing waste acid into the process (1), measure the pH of the solution while adding, and control the pH of the reaction solution to be 7.
[0079] (3) Heat up to 80°C and react for 1 hour.
[0080] (4) After 1 hour of reaction, add water to adjust the solution density to 1.37kg / m 3 , and control the temperature of the filtrate at the same time, after the temperature returns to 80°C, filter and press filter.
[0081] (5) Place the filtrate at 30° C., stir at constant temperature for 10 h, filter, and dry to obtain magnesium sulfate crystals.
[0082] (6) After the filter residue obtained in step (4) is washed with water for 4 times, manganese enrichment (manganese dioxide) can be obtained.
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