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Recycled de-inked pulp manufacturing

Environment / Manufacturing / Recycled de-inked pulp manufacturing

In order to convert old paper into de-inked pulp, eleven transformation steps are carried out.

Pulping

Pulping: Preparation of coarse pulp by mixing old papers with water and breaking them up using the pulper’s powerful agitator.

Screening

Screening: The pulp is pushed through the screen to remove solid impurities such as staples and glue.

Flotation

Flotation: Fine soapy bubbles are added to the pulp to bring ink particles to the surface.


Washing

Washing: Minor impurities in the water are removed, which were separated from the pulp during previous steps.

Dispersion

Dispersion: Ink particles are removed by rubbing fibres together.

Bleaching

Bleaching: The pulp is bleached using hydrogen peroxide, a non-chlorinated component that is environmentally friendly.


Second Flotation

Second Flotation: Fine soapy bubbles are added to the pulp to bring residual ink particles to the surface.

Cleaning

Cleaning: The pulp is put through cleaners, which use centrifugal force to separate the impurities from the pulp.

Bleaching

Bleaching: In this second phase of chlorine-free bleaching, the degree of whiteness of the pulp increases and any remaining colouring is removed.


Second Screening

Second Screening: The pulp is pushed through the screen to remove residual sticky particles.

Baling

Baling: Thickening the pulp by dewatering, sheeting, cutting and baling.

The pulp is then ready to be sent to the Rolland facility to be converted into quality recycled fine paper.