There are two types of suspension preheaters: cyclone preheater and vertical cylinder preheater.In the preheater, due to the contact surface between the raw material and the gas.Large volume and good heat exchange, so the thermal efficiency of the system is much higher than other kiln types.430 FULLY AUTOMATIC PLC CONTROL HORIZONTAL CUTTING BANDSAWS The exhaust gas discharged from the main combustion zone enters the four-stage or five-stage cyclone after complete combustion in the subsequent combustion zone. The preheated raw meal enters the fuel decomposition and combustion zone of the D-D furnace from the three-stage or four-stage cyclone, and enters the kiln through the five-stage cyclone after preheating and decomposition.530 FULLY AUTOMATIC PLC CONTROL HORIZONTAL CUTTING BANDSAWS The D-D furnace throat directly connected to the kiln tail is a device for adjusting balance, which can balance the combustion gas volume of the rotary kiln and the high-temperature air passing through the tertiary air duct. At the same time, since the raw meal fed to the D-D furnace forms a eruption layer in the reduction zone, the concentration of the raw meal in the lower part of the D-D furnace increases, so that the temperature of the exhaust gas entering the furnace drops sharply, preventing the bottom of the furnace from forming a crust .Aluminum alloy micro-channel cooling plate vacuum gas quenching The technological process in charge of the calciner is mainly the decomposition process of carbonate. In the actual production process, there are many factors affecting the decomposition of raw meal carbonate, and the situation is also very complicated. But the main factors are the decomposition temperature in the furnace, the degree of uniform distribution and residence time of materials in the furnace, and the physical properties of raw materials.How to Update your heat treatment
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