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All about briquetting

Briquetting technology is suitable for combustible waste such as sawdust, shavings, paper and biomass in general, as well as for metallic waste such as machining chips. Other wastes such as some plastics, polystyrene, dust from various products, etc. can also be briquetted.

The treatment of waste by briquetting is nowadays a modern and economical treatment solution. It makes it possible to use the materials for recycling or energy recovery.

In general, briquetting technology takes advantage of the mechanical and chemical properties of the materials, which are compacted into compact shapes without the addition of a binder by means of high-pressure compaction.

In the case of combustible waste, certain resins contained in the material are used to form a bond between the individual particles of the briquetted material. For example, when sawdust is compressed, lignin is released. Under high pressure, it is released from the cellular structures of the material and binds the individual particles into a compact briquette.

Other materials, such as cast-iron chips or paper, change their shape when pressure is applied above the strength limit and form a compact mass by mechanical wedging of the individual particles.

The output of briquetting is briquettes which have the shape of a cylinder. They are mechanically resistant, with a density of between 60 and 90 % of that of the original material in the case of metal waste briquetting. But for example, wooden briquettes tend to be even denser than the original material.

In the case of combustible wastes, their calorific value is 15-18MJ/kg and they can be burned in all types of stoves, boilers and solid fuel combustion plants. In gasifier boilers, their high calorific value is better utilised.

Metal briquettes are usually easier to melt. The chips float on the surface and burn easily due to their huge surface area. Briquettes made of metal chips sink better and have less metal burn-through. In addition, they are free of oils and emulsions that can be reused in production.

Briquettes made of other materials such as dust or various plastics are easier to handle, do not dust, occupy less volume in transport and storage.

Our company knows all this, realizes all aspects of the benefits of this technology and has been a leading global manufacturer of briquetting presses and related equipment since 1991. The experience, personnel and technical background of this family-owned company enable not only the production of briquetting presses, but also the design and manufacture of entire process lines.

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