The Double Disc Refiner operates on the principle of mechanical action between two stationary discs (stators) and two rotating discs (rotators). As pulp is pumped into the refining chamber, it is forced through the gaps between these discs. The centrifugal force and the specific pattern of the Double Disc Refiner plates subject the fibers to cutting, crushing, and rubbing actions. This process, known as fibrillation, increases the specific surface area of the fibers. By peeling back the outer layers of the fiber and encouraging internal swelling, the Double Disc Refiner enhances the fiber-to-fiber bonding potential. This is essential for achieving the necessary tensile strength, burst factor, and folding endurance in the final paper product.

The primary advantage of the Double Disc Refiner is its versatility. It can be used for both coarse and fine refining across a wide range of raw materials, including bleached hardwood and softwood pulps, straw pulp, and recycled OCC (Old Corrugated Containers). From an efficiency standpoint, the double-sided refining action provides a higher throughput-to-footprint ratio compared to older conical refiners. It offers lower specific energy consumption per ton of pulp, which is a significant factor in reducing the operational costs of a paper mill. Furthermore, the ability to fine-tune the disc gap allows manufacturers to reach specific freeness (SR) levels with high repeatability, ensuring that the paper machine receives a uniform furnish.

In summary, the Leizhan Double Disc Refiner represents a balance of robust mechanical engineering and sensitive process control. It is an essential tool for paper producers looking to optimize fiber development while maintaining energy efficiency and high output quality.
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