Ceramics for the pulp industry

Uses:

1. Siefing and screening: In paper and pulp production, technical ceramics are used to make sieve and screen coatings that are used to separate fibers from different particles and to improve the sorting of materials. These coatings are critical to achieve the desired particle size and quality of the material produced.
2. Valves and dampers: Ceramic valves and dampers are used in the process to regulate and control the flow of liquids and mass through pipes and pipes. They offer excellent chemical stability and can withstand the aggressive chemicals used in pulp production.
3. Wear-resistant components: In those parts of the equipment where high wear is a challenge, such as in grinding stations and crushers, technical ceramics are used to make durable components that can withstand wear and corrosion over time.
4. Temperature control: Ceramic components are used to regulate and maintain the correct temperatures in the processes of pulp making and paper making. Their high temperature resistance makes them ideal for such applications.

In cooperation with the cellulose and paper mills, we have designed and manufactured various ceramic applications for paper pulp machines such as:

1. Ceramic linings that sit under the sieve: ceramic hob for molding, ceramic carrier, ceramic rib for draining, soak suction element, straight suction element.
2. Ceramic pads under pipe suction elements
3. Evidence for pipe and cone blankets
4. Pump ring and cylindrical gaskets

Ceramic cones for paper industry

Conical separators (hydrocicloning) are used for cellulose pulp cleaning and separation of all dirt, which can affect paper quality. The basic separation principle is that cellulose pulp has circulation movement through the separator.

Al2O3 ceramic applications with high resistance to wear and the influence of the chemical have for many years an even surface and constant vase edge. With ceramic coatings, we have regular  dewatering and regular paper sheet forming without rendering on paper surface. At the same time friction is less (m=0.05) and the machine uses less energy, working life is longer and speed can be higher. Ceramic elements are manufactured with high precision ±0.02mm.

Advantages of technical ceramics in the pulp and paper industry:

1. Wear resistance: Technical ceramics is known for its exceptional wear resistance and ability to resist wear and corrosion. This is crucial in an industry where equipment is exposed to very harsh conditions.
2. Chemical stability: Ceramic materials are resistant to the chemicals used in pulp production, including bleach and other aggressive substances. This makes ceramics a reliable choice for components that come into contact with these substances.
3. Temperature resistance: Technical ceramics can handle high temperatures, which is important when the processes require heat treatment and temperature regulation.
4. Precision and accuracy: Ceramic components can be manufactured with high precision and have a smooth surface, which is important to achieve the desired quality of the material produced.
5. Long service life:  Ceramic components have a long service life and require minimal maintenance, which reduces operating costs.

In summary, technical ceramics is an indispensable component in the pulp and paper industry, where its ability to resist wear, chemical corrosion and high temperatures helps to improve processes and efficiency. Its precision and durability make it a valuable addition to the production of high-quality paper and pulp.

REFERENCES

Valmet  Finland, Andritz Oy Finland, Cellwood Machyneri Sweden, Voith paper Germany, Voith paper Norway, IBS Austria, Corbelini Italy