A lime rotary kiln is a type of industrial kiln used for the production of quicklime or calcium oxide from limestone. The rotary kiln is a long, cylindrical tube, lined with refractory bricks, that rotates on its axis and is slightly inclined from the horizontal. Limestone is fed into the upper end of the kiln, and as it moves through the kiln, it is heated to high temperatures, typically between 900°C and 1200°C, by a burner at the lower end of the kiln.
The heat causes the limestone to undergo a series of chemical reactions that result in the formation of quicklime, which is discharged from the lower end of the kiln. The quicklime can then be used in a variety of industrial applications, including steelmaking, water treatment, and agriculture.
Lime rotary kilns are typically very large and can range in length from 60 to 400 feet and in diameter from 6 to 20 feet. They are used extensively in the production of lime, and are also used in the production of cement, alumina, and other materials.
