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[Preparation method] The preparation of activated carbon generally involves the following steps: raw material crushing-viscous synthesis-drying (120-130°C)-carbonization (170-600°C)-activation (800-1000°C)-post-treatment
① Use anthracite and long flame coal to prepare activated carbon
Coal → preparation (less than 150 mesh) → kneading (tar + water) → pressure ball → carbonization → crushing (diameter 3 ~ 5 mm) → activation (steam) → activated carbon → index measurement (strength, iodine value)
Forming: After mixing and kneading coal powder, tar and water less than 150 mesh in a certain ratio (coal: tar = 9:1), the briquettes with a diameter of 35mm×30mm are formed on a pressure forming machine
Carbonization: carried out in the coke oven
Activation: The granular carbonized material with a diameter of 3 to 5 mm is activated in a fixed-bed activation furnace
Suitable conditions for preparing activated carbon from anthracite are: carbonization temperature 700-750°C, activation temperature 850-910°C, activation time 5.
The suitable conditions for preparing activated carbon from long flame coal are: carbonization temperature of 700°C, activation temperature of 900°C, activation time of 5.
②Prepare activated carbon/silica-aluminum oxide composite adsorption material from coal gangue
The main components of coal gangue: w(SiO 2 )=34.
Test method: After the coal gangue is pulverized and ground, add a certain quality of Na 2 CO 3 , grind and mix in a mortar, then transfer to a crucible, and simmer in a muffle furnace under anoxic conditions (if possible, it can be simmered in nitrogen Baking in an atmosphere) for a certain period of time
The optimal process conditions for the preparation of the adsorption composite material are: m (raw material): m(Na 2 CO 3 )=20:15, activation temperature is 750℃, activation time is 1h, activation atmosphere is N 2 atmosphere, and the activated material dissolves solids The ratio is 1:4
③Use peanut shells as raw materials to prepare activated carbon
④ Activated carbon is prepared with hickory shells as raw materials
⑤Prepare activated carbon with hemp stalks as raw materials
⑥Prepare powdered activated carbon from rice husk
