Method for preparing magnetic activated carbon powder from fly ash through processing
A technology of magnetic activated carbon and fly ash, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc. Pore volume, outstanding performance
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Embodiment 1
[0016] A method for processing fly ash into magnetic activated carbon powder, comprising the following steps:
[0017] (1) Grind fly ash until the particle size is in the range of 40-60 mesh, add calcium oxide powder with a mass fraction of 0.2%, mix well, add 2 times the volume of water and stir to dissolve, use a concentration of 2 mol / liter Adjust the pH value of the system with hydrochloric acid in the range of 10.5-10.6, add polyaluminum chloride with a mass fraction of 0.15% of the system, place it in a constant temperature water bath at 55°C and stir for 30 minutes, let it stand for cooling for 6 hours, filter, wash, and further dry Dry to constant weight to obtain pretreated fly ash;
[0018] (2) Weigh ferrous sulfate heptahydrate and ferric chloride hexahydrate according to the mass ratio of 2:7, dissolve them in 4 times the volume of deionized water, stir and mix for 20 minutes, and add the prepared in step (1) The amount of pretreated fly ash accounted for 25% of t...
Embodiment 2
[0024] A method for processing fly ash into magnetic activated carbon powder, comprising the following steps:
[0025] (1) Grind fly ash until the particle size is in the range of 40-60 mesh, add calcium oxide powder with a mass fraction of 0.3%, mix well, add 2.5 times the volume of water to stir and dissolve, and use a concentration of 2.5 mol / L Adjust the pH value of the system with hydrochloric acid in the range of 10.5-10.6, add polyaluminum chloride with a mass fraction of 0.18% of the system, place it in a constant temperature water bath at 60°C and stir for 35 minutes, let it stand for cooling for 7 hours, filter, wash, and further dry Dry to constant weight to obtain pretreated fly ash;
[0026] (2) Weigh ferrous sulfate heptahydrate and ferric chloride hexahydrate according to the mass ratio of 2.5:7.5, dissolve them in 4.5 times the volume of deionized water successively, stir and mix for 25 minutes, add the prepared in step (1) The amount of pretreated fly ash acc...
Embodiment 3
[0032] A method for processing fly ash into magnetic activated carbon powder, comprising the following steps:
[0033] (1) Grind fly ash until the particle size is in the range of 40-60 mesh, add calcium oxide powder with a mass fraction of 0.4%, mix well, add 3 times the volume of water to stir and dissolve, and use a concentration of 3 mol / liter Adjust the pH value of the system with hydrochloric acid in the range of 10.5-10.6, add polyaluminum chloride with a mass fraction of 0.20% of the system, place it in a constant temperature water bath at 65°C and stir for 40 minutes, let it stand for cooling for 8 hours, filter, wash, and further dry Dry to constant weight to obtain pretreated fly ash;
[0034] (2) Weigh ferrous sulfate heptahydrate and ferric chloride hexahydrate according to the mass ratio of 3:8, dissolve them in 5 times the volume of deionized water, stir and mix for 30 minutes, and add the prepared in step (1) The amount of pretreated fly ash accounted for 30% ...
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