(5) Preparation example
①Preparation of activated carbon with wood as raw material Two kinds of coniferous fir and masson pine in southern China and two broad-leaved paulownia and poplar in the north as raw materials, using zinc chloride as activator, and using different processes to prepare activated carbon
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The process of preparing activated carbon is as follows:
Raw material → sieving → zinc chloride impregnation → carbon activation → zinc chloride recovery → pickling → rinsing → drying → crushing
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Main process parameters: sawdust drying air temperature is 280℃, after drying sawdust moisture 28%-30%; zinc chloride concentration (in °Be) is 45 (pH1), 48 (pH2) and 53 (pH2.
5) ° Be; zinc chloride dipping sawdust time 8h, temperature 28-30℃; carbon activation time 2h, carbon activation end temperature 650℃; pickling vapor pressure 0.
2MPa, pickling time 1h; activated carbon crushing fineness 0.
08mm sieve passed 80%
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The ratio of zinc chips after mixing sawdust and zinc chloride at 45°Be is 1.
5:1; the ratio of zinc chips after mixing sawdust and zinc chloride at 48°Be is 1.
8:1; and at 53°Be the zinc chip ratio is mixed with zinc chloride.
The chip ratio is 2.
4:1
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The main performance test results of activated carbon prepared under different process conditions are shown in Table 4-31
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Table 4-31 The main performance test results of activated carbon prepared under different process conditions
