Papermaking Material Wet Grinding Machine, Wet Mill, Ultra-Fine Grinding Machine

Release time:

2025-11-03 11:00

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In the production chain of the paper-making industry, the processing quality of raw materials directly determines the performance, quality, and production costs of the paper. From wood pulp and waste paper pulp to fillers such as calcium carbonate and talc powder, each material must undergo meticulous treatment to meet the fine-tuning, uniformity, and dispersibility requirements of paper production.

In paper production, the key materials commonly used are primarily categorized into two major types: fibrous materials and non-fibrous fillers. While each type of material has its own specific processing objectives, both place stringent demands on equipment—requiring high precision and efficiency. Fibrous materials, represented by wood pulp and recycled paper pulp, form the structural backbone of paper. The core processing requirement is to thoroughly separate, cut, and refine these fibers, while simultaneously ensuring a uniform distribution of fiber lengths. —— Overly long fibers can lead to an uneven paper surface, while fibers that are too short will weaken the paper's strength. ； Non-fiber fillers—such as calcium carbonate, talc, and kaolin—are commonly used in papermaking to reduce the amount of wood pulp required and enhance the paper's brightness, smoothness, and printability. The core processing requirement for these materials is achieving a specified fineness (typically demanding particle sizes below 1–5 μm), with a uniform particle distribution and no agglomeration. If the filler fineness is insufficient or unevenly dispersed, it can lead to issues such as spotting and show-through on the paper, severely affecting print quality.

The vertical grinder has become the preferred equipment for papermaking material processing primarily because of its unique technical process, which allows for efficient and precise handling tailored to the specific characteristics of various papermaking materials. For fillers such as calcium carbonate and talc powder, the vertical grinder employs The "wet grinding" process uses water as the medium, mixing the filler material with water in a specific ratio to form a slurry, which is then fed into the grinding chamber. Inside the equipment, multiple layers of high-speed rotating grinding discs propel the slurry into thorough contact with the grinding media—typically zirconia beads, known for their high hardness and minimal wear, ensuring no impurities are introduced. Through the combined action of compression and grinding between the media particles, the filler particles are finely reduced to the desired particle size. Meanwhile, the equipment’s advanced dispersion system effectively breaks down any agglomerates among the particles, guaranteeing that the processed filler remains uniformly dispersed throughout the slurry. This process not only ensures precise control over the filler’s fineness and uniformity but also significantly minimizes dust pollution, lowering dust concentrations in the production environment and thus meeting stringent environmental standards.

The filler particles processed by the vertical grinder exhibit uniform size and excellent dispersibility, resulting in stronger bonding with fibers. In paper production, this allows for a reduction in filler usage—typically reducing it by 10%-15%), reducing wood pulp consumption and, consequently, lowering raw material costs. Meanwhile, the uniform distribution of fillers significantly enhances the paper's brightness—increasing it by 2%-3 units—and improves its smoothness by 15%-20%, making the paper more suitable for high-end printing applications and boosting the product's added value. Additionally, well-dispersed fillers help minimize uneven shrinkage during the drying process, reducing paper deformation and improving dimensional stability, which in turn lowers the defect rate in subsequent processing stages.

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