Types Of Trash And Dedusting In Gin

There are three types of trash :

  • 1] coarse type which includes  particles that are larger than  500 micrometer i.e. husk, stalk, leaf & seed fragments. Coarse trash can be removed by conventional equipments.   
  •  2] dust particles which are of 50 to 500 micrometer in size i.e. fibre fragments , fine fragments of coarse trash etc. The dust particles are partly loose & partly attached to the fibres & ,with a improvement in modern cleaning lines ,can also be removed effectively in the blowroom & card.
  • 3] micro dust particles which are between 1 to 50 micrometer in size. The micro dust consists of 50-80 % cellulose & remainder is a mixture of mineral  {quartz & clay} particles & waxy , greasy substances. The micro dust particles are tightly held on the fibre surface , possibly by electrostatic charges , can only be loosened by the fibre -fibre rubbing action produced at the drawframe. Since 80% of micro-dust particles are cellulosic , it  is reasonable to assume that these are fibre fragments resulting from the intensive cleaning action in blowroom . the more gentle opening & cleaning , as well as dust extraction during carding & drawing ,would alleviate the problem.

    Dedusting At Gin

  • Therefore gin-cleaning receives more attention so as to reduce the need for a high degree of intensive action in the blowroom, as well as studies of the removal of dust at the card & drawframe, & also at the rotor-spinning unit itself.
  • But it is found that  though it helps to reduce cardroom dust levels ,it do not reduce airborne dust level. It also increases loss of staple length  [0.79mm] accompanying with lowered yarn strength [break factor]. Therefore we can conclude that the use of cotton fibres as a competitive textile raw material is likely to be destroyed by multiple -stage lint cleaning before the allowable level in cardroom  is attained.



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