The rotary kiln is widely used in the fields of building materials, metallurgy, chemical industry, environmental protection, etc. It can be divided into cement kiln, metallurgy chemical kiln and lime kiln according to the different materials processed. The cement kiln is mainly used to calcine cement clinker; In the process of non-ferrous and ferrous metallurgy, such as iron, aluminium, copper, zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to sinter and roast ore, concentrate, intermedium, etc.; The lime kiln is mainly used to calcine limestones.
The decomposition rate of rotary kiln shows the decomposition degree of the carbonate in the raw materials to see whether the equipment design of the preheating and decomposition system is rational and whether the technical parameters are suitable. The in-kiln decomposition rate is the main index of measuring the normal operation of the decomposition furnace. High decomposition rate means that the role of the decomposition rate has been fully played, for this reason, it is necessary to properly improve the decomposition rate of the rotary kiln. The following measures can be taken to realize the improvement of in-kiln decomposition rate of rotary kiln.
(1) The volume design of the decomposition furnace should take into consideration the flammability of the fuel and make sure that the materials have sufficient staying time inside the furnace. Influenced by the grade and the fineness of the coal powder, the staying time needed by the raw materials and coal powder should be shorted, so is the space needed for independently burning the coal powder.
(2) The volume design of the decomposition furnace should take into consideration the decomposition speed of the raw materials which is not only related to the property of the limestone, but related to the atmosphere inside the decomposition furnace.
(3) When setting the position and number of the material and coal feeding point, it is...