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Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method. There are two main reasons for drying wood: Woodworking
The Thermo wood process consists of drying, heat treatment and finally cooling/conditioning, and takes up to 72 hours. [4] The Plato process consists of hydrothermolysis, dry curing and conditioning, and can take up to 7 days. The required time depends on wood species, width and initial moisture content. [5]
A steel mold that is placed on the back of the wood while heat bending can help ensure that all the bends and curves are done to the requirements of the project being made. After heat bending the wood, clamping the wood into a solid mold will reinforce the bends made to the wood while drying, preventing the wood from straightening while it dries.
Drying malted barley for brewing and other fermentations; Drying hops for brewing (known as a hop kiln or oast house) Drying corn (grain) before grinding or storage, sometimes called a corn kiln, corn drying kiln [8] Drying green lumber so it can be used immediately; Drying wood for use as firewood; Heating wood to the point of pyrolysis to ...
Further drying of the wood results in strengthening of the wood fibres, [1] and is usually accompanied by shrinkage. Wood is normally dried to a point where it is in equilibrium with the atmospheric moisture content or relative humidity, and since this varies so does the equilibrium moisture content. Laboratory testing has found the average FSP ...
For instance in wood (timber) drying, air is heated (which speeds up drying) though some steam is also added to it (which hinders drying rate to a certain extent) in order to avoid excessive surface dehydration and product deformation owing to high moisture gradients across timber thickness. Spray drying belongs in this category.
For example, waterlogged wood is something an archaeologist might stumble upon during an excavation either from the wood being submerged or near water or being in moist soil over time. Wood especially survives in archaeological sites that are dark anaerobic environments where bacteria that would cause wood decay cannot live. [5]
Green wood contains more moisture than seasoned wood, which has been dried through passage of time or by forced drying in kilns. Green wood is considered to have 100% moisture content relative to air-dried or seasoned wood, which is considered to be 20%. Energy density charts for wood fuels tend to use air dried wood as their reference, thus ...