Importance

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Abstract

Waste paper contains sticky foreign material, and the recovery and sending of this sticky foreign material to a paper-making process together with fiber is liable to lead not only to the sticky foreign material sticking to and contaminating the paper making machine or dryer but also paper peeling and tearing, causing a decline in paper quality. This method for recovering fiber form a screening reject is characterized by comprising the steps of: sending a screening reject coming out from a coarse sorting process to a fine sorting pre-processing process such that the screening reject is impacted against rotating blades 8 or stationary blades 11 in the interior of a cylinder body 2 and detachment of the fibers from the sticky foreign material by the sticky foreign material being kneaded and granulation and balling-up of the detached sticky foreign material are promoted, taking advantage of the sticky foreign material becoming extendable and shrinkable due to softening in an environment in which heat is generated from friction between fibers; and then sending the result to the fine sorting process so that the fiber is recovered with the balled-up sticky foreign material being separated as a screening reject via the fine sorting process.

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First Claim