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Manufacturing process of honeycomb activated carbon
Time:2022-04-24

(1) Pulverized coal configuration: lignite or bituminous coal and coking coal are crushed to ≤ 2mm respectively, then mixed according to the mass ratio of lignite or bituminous coal: coking coal = 1:0.2-0.5, and then ground to 74 μ M or less to obtain pulverized coal with uniform mixing;

(2) Emulsified Coal Tar: in the first step, the asphalt content is ≥ 55%, and the high-temperature coal tar is preheated to 120-150 ℃; The second step is to prepare the emulsifier aqueous solution, add 2-6% surfactant of high-temperature coal tar mass and 0.5-2% stabilizer of high-temperature coal tar mass into the water, and preheat to 80-90 ℃ to form the emulsifier aqueous solution; In the third step, according to the mass ratio of high-temperature coal tar: emulsifier aqueous solution = 1 ∶ 0.3-0.7, under the condition of stirring, the high-temperature coal tar is added into the emulsifier aqueous solution to make Emulsified Coal tar;

(3) Processing of plastic slime: according to the mass ratio of pulverized coal: Emulsified Coal Tar: water: water-soluble adhesive: lubricant = 34-57 ∶ 30-36 ∶ 6-29 ∶ 3-5 ∶ 2-3, add it into the kneader and stir evenly to make plastic slime;

(4) Sliming: the plastic slime is treated by vacuum sliming machine or extrusion molding machine to mix the slime evenly, and then filtered with 60 to 100 mesh screen in the molding machine to remove large particles;

(5) Extrusion molding: the coal slime after mud refining treatment is added into the extrusion molding machine equipped with honeycomb steel mold for molding to obtain wet honeycomb;

(6) Drying: dry the wet honeycomb until the moisture is less than 2%;

(7) Carbonization and activation: use inert gas as shielding gas, heat it to 600-800 ℃ at the heating rate of 3-5 ℃ / min, and carbonize at this temperature for 2-3 hours; Then, according to the heating rate of 5 - 15 ℃ / min, it is heated to 750-850 ℃, activated with steam for 3-15 hours, and finally made into coal honeycomb activated carbon through multi-channel process.