A kiln is a device made of refractory materials for calcining materials or firing products. According to the variety of calcined materials, it can be divided into ceramic kiln, cement kiln, glass kiln, enamel kiln, lime kiln and so on. The former can be divided into continuous kiln (tunnel kiln), semi-continuous kiln and intermittent kiln according to the operation method. According to the heat source, it can be divided into flame kiln and electric kiln. Vacuum heat treatment of aluminum alloy die castings According to the condition of the heat source facing the green body, it can be divided into open flame kiln, muffle flame kiln and semi muffle flame kiln. According to the carrier of the green body, it can be divided into kiln car kiln, pusher kiln, roller bottom kiln (roller kiln), conveyor belt kiln, walking beam kiln and air cushion kiln. According to the number of channels, it can be divided into single channel kiln, double channel kiln and multi channel kiln. Vacuum Oil Quenching for steel hardening heat treatment Generally, the fuel for large-scale kilns is mostly heavy oil, light diesel oil or coal gas and natural gas. Kilns are usually composed of four parts: kiln chamber, combustion equipment, ventilation equipment, and conveying equipment. Most electric kilns use electric furnace wire, silicon carbide rods or molybdenum disilicide as heating elements. The structure is relatively simple and the operation is convenient. In addition, there are various atmosphere kilns and so on.Vacuum carburizing of aviation gear steel In specific industries, there are more subdivided types of kilns, such as cement rotary kilns, glass tank kilns, steel blast furnaces and converters, and some equipment in the chemical industry can also be classified as kilns. However, industrial kilns in the general sense mainly refer to calcination equipment for metals and inorganic materials.Influence of Reaction Sintering Process on Properties of Silicon Carbide Ceramics