Kiln
Ceramic kilns
Uses include: Annealing, fusing and deforming glass, or fusing metallic oxide paints to the surface of glass Heat treatment for metallic workpieces Ceramics Brickworks Melting metal for casting Calcination of ore in a rotary kiln prior to smelting Pyrolysis of chemical materials Heating limestone with clay in the manufacture of Portland cement, the Cement kiln Heating limestone to make quicklime or calcium oxide, the Lime kiln Heating gypsum to make plaster of Paris For cremation (at high temperature) Drying of tobacco leaves 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. Drying green lumber so it can be used immediately Drying wood for use as firewood Heating wood to the point of pyrolysis to produce charcoal Kilns are an essential part of the manufacture of all ceramics. Ceramics require high temperatures so chemical and physical reactions will occur to permanently alter the unfired body. In the case of pottery, clay materials are shaped, dried and then fired in a kiln. The final characteristics are determined by the composition and preparation of the clay body and the temperature at which it is fired. After a first firing, glazes may be used and the ware is fired a second time to fuse the glaze into the body. A third firing at a lower temperature may be required to fix overglaze decoration. Modern kilns often have sophisticated electronic control systems, although pyrometric devices are often also used.
Kiln-5