Disintegration Chamber
Positioned at the head of high-capacity recycling lines, inclined rotating cylinders slush recovered paper bales under gentle gravity drops. Modern containerboard mills install the drum pulper to process post-consumer corrugated containers at high continuous throughputs reaching two thousand tons per day. The rotating shell lifts thick stock slurry up internal lifter bars and drops it back onto the hard drum floor at high consistency between fourteen percent and twenty percent.
Repeated falling action breaks fiber bonds through inter-fiber friction without shredding coarse contaminants.
Screening Separation
Continuous processing occurs along two distinct zones within the inclined cylindrical body. High consistency wetting and slushing take place in the solid first section, while the perforated second section adds dilution water to extract fiber slurry through screen holes ranging from six to ten millimeters in diameter. Perforated zone washing rinses usable fiber from large contaminants before reject streams exit the open drum discharge end.
Dilution water addition drops stock consistency to four percent inside the screening chamber to enable gravity passage through the perforated wall. Mechanical drive rollers support the external riding rings, maintaining smooth drum rotation at twelve to fifteen revolutions per minute. Low shear forces inside the drum preserve plastic film, wet-strength tape, foil laminates and wire fragments in large pieces for easy mechanical screening.
Contaminant Removal
Coarse debris exits the open discharge end directly into rejection collection hoppers without blocking extraction holes. Heavy items such as stones, metal straps, gravel and glass drop out early due to high stock density. Fiber loss in heavy rejects stays below one percent under optimized dilution flow.
