Preparation method of coal-based agglomerated activated carbon with high methylene blue value
A high methylene and activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as poor adsorption of methylene blue, and achieve the effect of improving the activation effect
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example 1
[0035] The long-flame coal is the raw coal of the Heishan Coal Mine in Urumqi, and the gas-fertilized coal is the Hongshanwa gas-fertilized coal in Zhundong, Xinjiang.
[0036] The asphalt is high-temperature modified coal tar pitch produced by Baoli Chemical Industry in Handan, Hebei Province, and its softening point is 113-118°C.
[0037] Among the raw coals, the content of long-flame coal is 75wt%, that of gas fertilizer coal is 17wt%, that of asphalt is 5wt%, and that of zinc chloride is 3wt%. The raw coal is pulverized and screened into coal powder with an average particle size of 29 μm, wherein the content of coal powder with a particle size greater than 80 μm is 2.5 wt %; the content of coal powder with a particle size greater than 40 μm is 28 wt %.
[0038] Use a briquette forming machine to briquette the raw coal, with a molding pressure of about 13t / cm, and return coal particles with a particle size of 1mm-3mm, which is about 30% of the weight of the raw coal, back t...
Embodiment 2
[0042] The difference from Example 1 is that: the long-flame coal is raw coal from Qibei Mountain, and the gas-fertilized coal is coal from Fukang Shuntong Coal Mine. In the raw coal, the content of long flame coal is 70wt%, that of gas fertilizer coal is 20%, that of asphalt is 5%, and that of zinc chloride is 5%. The specific gravity of the pressed material pile is 670g / l, and the strength is 93.3.
[0043] The carbonization treatment conditions are as follows: carbonize the material for 3 hours in an electric heating external heating converter at a temperature of 530-550°C. The activation treatment conditions are: in the presence of an activation medium, that is, flowing steam with a flow rate of 1.5 kg steam / kg carbonized particles, activate the carbonized particles in the converter at 889-900 ° C for 4.5 hours to obtain activated carbon products. The indicators of the activated carbon are as follows: the iodine value of the product is 1091, the strength is 96.87, the bul...
Embodiment 3
[0045] The difference from Example 1 is: before briquetting, the crushed raw coal is sieved to coal powder with an average particle size of 22 μm, wherein the content of coal powder with a particle size greater than 80 μm is 2 wt %; the coal powder with a particle size greater than 40 μm Coal powder content is 15wt%. The specific gravity of the pressed material pile is 700g / l, and the strength is 93.1.
[0046] The indicators of the activated carbon are as follows: the iodine value of the product is 1096, the strength is 96.32, the bulk specific gravity is 439, and the methylene blue value is 276.
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