Fibre Suspension
Solids content relative to the total mass of the mixture defines the physical state of a slurry during the initial stage of stock preparation. Pulper consistency dictates the mechanical shear force available for breaking down paper or board scrap in a hydro-pulper vat. High levels of fibre load promote efficient ink detachment and contaminant dispersal because the friction between individual components increases under compression.
Lower levels allow faster movement but reduce the impact energy directed at rigid items.
Process Control
Operational limits generally fall between three and eighteen percent depending on the specific machinery design and the required rate of throughput. Engineers regulate the water to fibre ratio to ensure the rotor maintains a steady torque while avoiding motor overload or internal bridging. Deviations from the target set point cause uneven batch quality and force extended cycle times to achieve proper dispersion.
Correct settings prevent excessive energy expenditure while ensuring that the slurry reaches the intended pumpability for downstream screening.
Mechanical Demand
Rotational speed and blade profile interact with the suspension density to determine the rate of fibre separation. Increased concentrations require higher power input to overcome the viscosity of the heavy mass during the agitation phase. Uniform blending remains the primary goal to avoid stagnant zones that trap contaminants or leave clumps of unprocessed material inside the vessel.
Optimal setups balance the hydraulic resistance of the vat contents against the mechanical capability of the drive system to provide high yield results.
