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May 13, 2010 · Kiln drying of grade hardwood lumber is carried out in a closed chamber or building in which heated, humidity-controlled air is rapidly circulated over the surface of the wood being dried....
Dec 6, 2023 · Kiln drying is a controlled process of removing moisture from wood. By using a kiln, which is essentially a large oven, you can accelerate the drying process by applying heat, controlling humidity, and ensuring proper air circulation.
- Rhodri Evans
- What Is Kiln-Dried Wood?
- What Is Air-Drying?
- The Kiln Drying Process
- Moisture Past The Kiln
- What’s The Solution?
Kiln-dried wood is wood that has been dried in an oven (kiln). With a kiln, you can control the environment such as temperature, humidity, and steam levels for a set period of time. Allowing you to dry wood to the desired moisture content faster than air-drying.
Air-drying lumber simple means to stack lumber and expose it to the outdoors. Depending on the species of wood and desired moisture content the air-drying process could take several months to almost a year. Make sure to properly stack the wood for sufficient air circulation.
When trees are felled and brought to a lumber mill, the first step is usually to debark and sort the logs by species, size or by end-use. Logs destined for wood flooring, for example, are then sawn into rough boards of the required dimensions. These are often edged or trimmed for length before they are dried. Drying can be done either by air or kil...
The reality of wood’s nature, and indeed, part of its attraction over the centuries, is that it is a hygroscopic material. Until it is fully sealed, wood constantly interacts with moisture in its environment and will absorb or release moisture as necessary to find a balance with its environment. Examined closely, wood’s long, hollow cell structure ...
Just as lumber mills and manufacturers invest in accurate wood moisture content management tools and systems, each step of a wood product’s lifespan requires moisture content measurement. Continuing with our wood flooring example, it is just as important that the flooring installer allows each board bundle to acclimateto the job site environment be...
Aug 2, 2024 · How Does Kiln Drying Work? Imagine a large oven, but instead of baking cakes, it's drying wood. That's essentially what a kiln is. Here's a step-by-step breakdown of the process: Loading: Freshly cut wood is stacked onto trolleys or pallets. Heating: The kiln is heated to temperatures between 60°C and 90°C.
- Jonathan Hill
- Schematic of a dry kiln. (Dry Kiln Operator’s Manual. USDA, 1991) Dehumidification Kilns. Today, dehumidification kilns are among the most commonly used kilns in the wood products industry.
- Dehumidification drying system. (Dry Kiln Operator’s Manual. USDA, 1991) Vacuum Kilns. The less commonly used vacuum kiln is 3 to 4 times more expensive than either conventional or dehumidification kilns because of limited drying capacity in the chamber.
- Development of drying stresses during the kiln process. If the maximum tension stress is exceeded at the outer fiber, surface check occurs and is considered a drying defect.
- Surface check, end check and collapse as drying defects. Stage 3. As drying progresses, the center of the board will lose enough moisture to pass below the fsp.
Aug 19, 2023 · In this ultimate guide to the drying of kiln dried wood, we'll explore the step-by-step process of creating kiln dried logs, why this process is so important, the various types of drying, and the equipment involved.
How kiln drying works. Kiln drying involves placing wood in the main chamber of a kiln and using a heat source and fans to remove moisture from it. As the moisture content goes down, the operator can raise the temperature by increments.
