Coal-based activated carbon is a porous adsorption material made of high-quality coal by carbonization, activation and other processes, which is widely used in environmental protection, chemical industry, medicine and other fields. As a key process in the production process, screening directly affects the particle size distribution and performance of the product, and is the core link of quality control.
The screening process needs to accurately grade the particle size of activated carbon according to the application scenario. The vibrating screen or roller screen is usually used for multistage screening, and the material is separated into 0.5-1mm, 1-2mm and other specifications through the screen of different mesh numbers. Screening parameters including vibration frequency, screen surface inclination, processing capacity, etc. need to be precisely controlled to ensure screening efficiency and avoid particle damage. For ultrafine powder (0.15mm), it is necessary to configure an air classifier to achieve micron particle size control.
Screening quality directly affects product performance too fine particles can result in excessive filling density affecting fluid penetration, while too coarse particles can reduce specific surface area. Activated carbon for water treatment needs to retain a larger particle size (2-4mm) to ensure mechanical strength, while gas phase adsorption requires uniform particles of 0.5-1.5mm. The modern production line has realized the automatic control of the screening division sequence, and the real-time monitoring through the online particle size analyzer ensures that the product pass rate is stable at more than 98%.
After screening, the activated carbon needs to be dedusted to remove the micro-powder attached to the surface, and finally the finished product packaging is completed through the quantitative packaging system. The scientific screening process can not only improve the added value of the product, but also reduce the transportation loss, which is of great significance to promote the technological upgrading of the activated carbon industry.
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