Classification of furnaces
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Classification of furnaces
According to the types of calcined materials, it can be divided into ceramic kilns, cement kilns, glass kilns, enamel kilns, etc. The former can be divided into continuous kiln (tunnel kiln), semi-continuous kiln and batch kiln according to the operation method.
According to pyrogen, it can be divided into flame kiln and electric heating kiln.
According to the heat source facing the green body, it can be divided into open flame kiln, muffle kiln and semi muffle kiln.
According to the blank carrier, it can be divided into kiln car kiln, pusher kiln, roller hearth kiln (roller kiln, conveyor kiln, walking beam kiln and air-cushion kiln, etc.).
According to the number of channels, it can be divided into single-channel kiln, double-channel kiln and multi-channel kiln.
Generally, the fuel for large-scale kilns is mostly heavy oil, light diesel or coal gas, and natural gas.
The kiln usually consists of four parts: kiln room, combustion equipment, ventilation equipment, and conveying equipment.
Most electric kilns use electric furnace wires, silicon carbide rods or molybdenum disilicide as heating elements. The structure is relatively simple and the operation is convenient.
In addition, there are a variety of atmosphere kilns, electric porcelain kilns, etc. Due to the special performance and high temperature of the kiln, this requires that the structure and heat insulation of the kiln are well done. With the progress of industries in various countries around the world, furnaces and kilns are also developing towards large-scale, high-efficiency and longevity. The kiln structure is gradually optimized, the heat insulation effect is improved, the service life of the kiln materials increases, and the kiln interior Refractory materials used in linings have also undergone major changes. New long-life, high-efficiency refractory materials, and better lining protection and energy-saving coatings are gradually being applied, and the energy efficiency and life of furnaces are gradually improved.
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