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Small firewood logs drying on-site. For some purposes, wood is not dried at all, and is used green. Often, wood must be in equilibrium with the air outside, as for construction wood, or the air indoors, as for wooden furniture. Wood is air-dried or dried in a purpose built oven . Usually the wood is sawn before drying, but sometimes the log is ...
A sawmill with the floating logs in Kotka, Finland. Logs are converted into lumber by being sawn, hewn, or split. Sawing with a rip saw is the most common method, because sawing allows logs of lower quality, with irregular grain and large knots, to be used and is more economical. There are various types of sawing:
The beehive-shaped kilns are each about 20 feet (6.1 m) tall and 20 feet (6.1 m) in diameter. When operating, each kiln used 30 to 40 cords of Douglas fir wood per load, producing about 1,500 to 2,000 bushels (70 cubic meters) of charcoal over a two-day burn. The kiln operation lasted for less than three years, employing 150 to 200 people at ...
Seven early 19th-century lime kilns survive in NRHP-listed Rockport Historic Kiln Area. Thomaston, Maine; Harris Farm (Walkersville, Maryland) List of Michigan State Historic Sites; Grey Cloud Lime Kiln, Cottage Grove, Minnesota, NRHP-listed; G. A. Carlson Lime Kiln, Red Wing, Minnesota, NRHP-listed; Mississippi Lime Kiln, Ste. Genevieve, Missouri
Roller kiln: A special type of kiln, common in tableware and tile manufacture, is the roller-hearth kiln, in which wares placed on bats are carried through the kiln on rollers. In the intermittent kiln, the ware is placed inside the kiln, the kiln is closed, and the internal temperature is increased according to a schedule. After the firing is ...
María and Julián Martinez pit firing blackware pottery at San Ildefonso Pueblo in New Mexico (c.1920). Pit-firing continued in some parts of Africa until modern times. In Mali, a firing mound, a large version of the pit, is still used at Kalabougou to make pottery that is commercial, mainly made by the women of the village to be sold in the towns.
The first kiln at the Coplay Cement Company was a dome kiln. Dome kilns were inefficient; they had to shut down often. In 1893 Coplay Cement built Mill B, containing the Schoefer kilns standing today. Originally enclosed in a large building, Schoefer kilns could run continuously. Soon, however, the even more efficient rotary kilns came into use.
The Milwaukee Falls Lime Company incorporated in 1890, and assumed and expanded operations at the Grafton quarry that had begun in 1845. Between 1890 and 1893, the company constructed five wood-burning lime kilns near the quarry to produce quicklime from the dolomite of the Racine formation found just beneath the top soil along the west bank of the Milwaukee River.
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