Study On Characters Of Coal Combustion And Catalysis Combustion In Cement Industries

Coal is the main fuel used in the cement industries. With the reduction of high quality coal, it begins to utilize the inert coal, and it will be certain to influence the clinker burning, quality and the stable of the kiln's condition. In order to widen its selective range of coals in cement kiln, and bring about the high efficiency utilization of fuel, in this thesis, considering some different coal quality, the characters of coal combustion and catalysis combustion were studied, it have practically meaningful for instructing how to design and operate cement kiln.The experimental study the slagging property of coal on higher-temperature fusing properties of coal ash and materials, evaluate it with the method of grey clustering, the experiment shows: it is high ash content and low volatile matter content rather than the fusion point value that are the main factors which influence primary the temperature of liquid phase of cement raw meal.The studying results that additives effects on coal combustion characteristics shows that effect of catalyzer is affected by the kind of coal, the kind of catalyzer and the amount of catalyzer etc. The effusive effect of volatile matter influenced by catalyzer is more greater on coal stone. Moreover, the influence on cement production resulted by catalysis combustion was discussed in this thesis, it shows that the primary temperature of liquid phase of cement raw meal is great dependent on the atmosphere, it is lower in the reduction atmosphere than that in the oxidation atmosphere. It will not do harm to the quality of clinker when we calcine the clinker taking use of catalyzer in reasonable quantity.In this thesis, the author used temperature-rising experimental methods to discuss the relation between the microstructure of coal and the coal combustion characteristics. The combustion characteristics of steady composition was the best, the more the steady composition is, the better its combustion characteristics is.The characteristics of this thesis are as follows: First, we evaluate the slagging of coal taking use of grey clustering method, and study the influentialfactor of the primary temperature of liquid phase of cement raw meal from many angle such as atmosphere, coal quality and so on. On the other hand, we proceed initial research about the potential of inert coal used in a large number by cement industries through researching the catalysis combustion and its influential on the cement production.