Preparation method and application of Fe/C composite carrier nitrogen and phosphorus removal material based on limonite
A composite carrier, denitrification and phosphorus removal technology, applied in chemical instruments and methods, alkali metal compounds, water/sewage treatment, etc., can solve problems such as high price and limited adsorption capacity, achieve high porosity, reduce preparation cost, The effect of reducing production costs
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[0017] Example 1: Limonite, straw and attapulgite clay were crushed and sieved to obtain powder with a pore size of 0.1-2mm. The mass ratio of limonite powder, straw powder and attapulgite clay powder was 2:2 :1 Mix to obtain the mixture powder, add water to adjust the water content to 12%, place in a ball-forming plate, rotate at 400r / min for 2.5 hours to obtain wet mixture particles, and dry at 105°C for 5 hours to obtain dry mixture particles. Place it in a high temperature tube In a type furnace, calcined at 700°C for 20 hours in a nitrogen atmosphere to obtain a limonite-based Fe / C composite carrier for denitrification and phosphorus removal material 1, such as figure 1 As shown, the material prepared by the present invention has a porous structure with a large pore size, such as figure 2 As shown, the porosity can reach 64%, and the particle strength can reach 58N.
Example Embodiment
[0018] Example 2: Limonite, straw and attapulgite clay were separately crushed and sieved to obtain powder with a pore size of 0.1-2mm. The mass ratio of limonite powder, straw powder and attapulgite clay powder was 1:1 : 0.5 to mix to obtain the mixture powder, add water to adjust the water content to 12%, place in a ball-forming plate, rotate at 500r / min for 2.5 hours to obtain wet mixture particles, dry at 105°C for 5 hours to obtain dry mixture particles, and place in a high temperature tube In a type furnace, calcined at 800°C for 20 hours under a nitrogen atmosphere to obtain a Fe / C composite carrier based on limonite for nitrogen and phosphorus removal material 2, such as figure 2 As shown, the porosity of the material prepared by the present invention can reach 40%, and the particle strength can reach 90N.
Example Embodiment
[0019] Example 3: Limonite, straw and attapulgite clay were separately crushed and sieved to obtain powder with a pore size of 0.1-2mm. The mass ratio of limonite powder, straw powder and attapulgite clay powder was 1.5:1 :0.5 to mix to obtain the mixture powder, add water to adjust the water content to 12%, place in a ball-forming plate, rotate at 450r / min for 2.5 hours to obtain wet mixture particles, and dry at 105°C for 5 hours to obtain dry mixture particles, and place in a high temperature tube In a type furnace, calcined at 600°C for 20 hours in a nitrogen atmosphere to obtain a Limonite-based Fe / C composite carrier for denitrification and phosphorus removal material 3, such as figure 2 As shown, the material prepared by the present invention has a high porosity up to 78% and a particle strength up to 54N.
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