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The paper presents a wide variety of by-products with low bulk density and high dispersibility and ways of their utilization. To obtain compacted products from this type of materials the preliminary micro-granulation stage is necessary, which can be done by the roller compactor. It is suggested to carry out the process of powdered by-products compaction in the vibration-centrifugal granulator, which includes a device for pre-compacting and three drums, where sequentially conducted processes of pellet formation in waterfall-cascade mode, classification by vibration and compacting of the surface layer in the drum with toroid-shape chambers. The manufacturing technology of compacted products made of paper, cardboard and other fiber-type material wastes includes a waste shredding stage in the shredder and rotary crusher that follows by a pneumatic conveying of the gas-dispersion mix into the cyclone unit for dispersed phase settling. Therefore, the mentioned-above method of its compacting is acceptable for the collection in cyclone grinded particles. To increase the settling efficiency of the fiber type by-products it is worthwhile pre-compacting it, which follows with the microgranules obtaining by the pneumomechanical method in the airflow. The paper presents the technology of the granulated materials obtaining by pulp-and-paper waste recycling. It demonstrates the economic effectiveness of the introduction into the aspiration system of technological complex the pneumomechanical device for dispersed mix agglomeration using subquality products and bonding additives.

Economic effectiveness of the aspiration systems in fiber by-products recycling technology