From Waste to Pulp – The Complete Cardboard Recycling Line
The Cardboard Recycling and Pulp Line is a core industrial link connecting waste and recycled resources. It transforms everyday waste cardboard such as old corrugated boxes (OCC) and cartons into high-quality recycled pulp that can be reused in papermaking, allowing paper fibers to be recycled.
Cardboard Recycling Line
1. Pulping (Hydraulic Pulper): Waste paperboard and water are mixed in a hydraulper, where a high-speed rotating rotor breaks down the pulp into coarse pulp. Large-scale projects often use drum pulpers (such as the Andritz FibreFlow), which gently dissociate fibers through a rotating drum, resulting in good impurity removal and low energy consumption (e.g., Valmet OptiSlush, a single unit can process up to 1300 tons of oven-dry pulp per day).
2. Screening and Purification (Multi-stage Impurity Removal): The coarse pulp undergoes multiple purification stages—
High density cleaner: Centrifugal force removes heavy impurities such as staples and sand.
Pressure screen: Finely screens and separates light impurities such as plastics and adhesives.
fractionating screen (optional): Grades fibers of different lengths to improve paper strength.
tailings screen: Recovers fibers from the finely screened slag, reducing loss.
3. Deinking and Bleaching (optional): When processing ink-containing raw materials such as waste newspapers and office paper, equipment such as flotation tanks is added to remove ink using chemical agents and air bubbles.
4. Thickening and Forming: Low-concentration pulp is dewatered and thickened using a multi-disc thickener. High-concentration pulp can be fed into a recycled pulp board mill for forming and drying to produce dry pulp boards (for easy storage and transportation), or directly pumped to the paper mill for use.
From the shredding of waste paperboard and the gradual removal of impurities, to the grading of fibers and the recycling of water, every step is related to the quality, energy consumption, and environmental benefits of the final recycled pulp. Email us or leave us a message to inquire about Our email: leizhanpulper@gmail.com
