Coal as the primary heat source rotary kiln materials, one of the combustion process in the kiln from the visual point of view is a very simple process, but from the actual operation and theoretical analysis, this process is also more complex, detailed below introduction about how coal is carried out in a rotary kiln burning. Rotary kiln installation after the first major task is to conduct a trial run, the ignition work can be said to be a more technical content of the living, usually have professional workers to operate the ignition, whether because of this relationship with pulverized coal combustion in the kiln. When open the kiln firing, the kiln without heat, it must be 3-5m away from the kiln by placing wood, cotton and other combustible ignition and combustion of waste oil, so that the temperature reaches the ignition temperature of coal powder and then injected into the coal can be burning. Coal is first heated to dry, containing 1% -2% of the water discharge, generally require 0.03-0.05s. However, in the case of crude wet coal, preheating and drying time should be extended. Preheating and drying the length of time attempting to determine the length of the black flame. The temperature rises to 450 a 500 ℃, volatiles began to escape, at 700 a 800 ℃, all escape (Teng coal volatiles escape of moisture and remaining after a fixed carbon particles and ash), then evaporation powder encounter air began to burn. When formed after coal combustion flame flame surface and generates heat, so that the kiln temperature starts to rise, the heat from the high temperature to a lower temperature is always passed behind the flame surface unburned coal surface temperature lower than the flame, so the flame surface constantly unburned coal behind its transfer to reach the ignition temperature of the combustion flame to form a new surface. Rotary kiln fuel combustion flame formed session turbulent diffusion flame, the combustion process can be divided into fuel is mixed with air, fuel and air is heated to the ignition temperature, vola  
tiles and char combustion first caught fire and burned four stages. From the above four aspects can be seen, is a critical step of mixing, thus control the rate of gas diffusion, implementation, and also the rate of pulverized coal mixed with air, but also to achieve control of the rate of coal combustion. Please indicate Henan YuFeng Heavy Machinery