CLASSIFICATION OF PRODUCTS OF SELECTIVE GRINDING OF GLASS PLASTIC WASTE
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Abstract
It is proposed to use a multistage classification technology, including pneumatic classification and mechanical separation on a sieve, to obtain secondary fibrous material from the products of selective grinding of fiberglass production waste. A developed installation for studying the process of selective grinding of fiberglass waste, including a classification stage, is presented. The results of experimental studies of the extraction of under-crushed material, small fibers and particles of crushed polymer matrix from the products of selective grinding of waste, trimmings of fiberglass based on the binder Depol S-180 PT and fiberglass rods based on ED-20 are presented. Rational values of the average air flow velocity on the classifier cross-sections are determined, allowing the most efficient implementation of the pneumatic classification process in a rotor-gravity classifier. The diameter of the sieve holes is selected necessary for high-quality separation of polymer matrix particles from the fibrous fraction. The content of glass fiber in the obtained fibrous material was determined by means of the burning method. The presented technological scheme allows to extract fibrous material from the products of crushing fiberglass waste, which can be used as a raw material in the production of new products.
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References
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