Coal Petrology Blending Technology Research And Application

The traditional coal blending method is mainly representation coal metamorphic degree dry ash-free basis volatile and coal caking index G value is the main reference index, glial layer thickness and oliver and dilatation for auxiliary index to evaluate the with coal. But volatile and G value have some deficiencies. Coal petrography indicators mainly include:coal vitrinite mean maximum reflectance (Rmax,%), vitrinite reflectance distribution/maceral content and index. Using Rmax can accurately representation coal metamorphic degree, but also in the whole coal rank range are effectiveCoal vitrinite is coal of bonding effect active component, even if they are of the same coal vitrinite fractions, its quality is not uniform. Active components in coal. This characteristic can be determined by coal vitrinite reflectance distribution diagram to express accurately. This is a traditional index G value, Y value index is unable to do so. In addition the vitrinite reflectance distribution diagram can also accurately identifying mixed coal, guided by a variety of coking coal with reasonable accuracy, but also can use petrography method on coke microstructure, microscopic structure analysis and evaluation, in turn to revise and improve the coal blending scheme. In view of the above, we carried out rock match coal research and application, is designed to more accurately using a variety of coking coal resources, improve the quality of coke, while minimising the likelihood of coking coal blending cost. The main work is as follows:1、Through testing, research, from coal petrography angle we know our company the nature of coking coal, the coal petrology on classification, at the same time to my company’s coking coal for petrographic analysis and evaluation, the coal blending structure improvement.2、Through to our company of coke and its alkali and alkali and petrographic microscopic structure analysis and research, made clear our company coke various macerals in alkali and alkali conditions the reaction sequence, for later use petrography theory and point of view, optimizing coal blending, improving coke quality provides guidance.3、In the laboratory200kg small coke oven test successful premise, were the first to6furnaces and second10furnace industrial oven test, in summing up the two industrial furnace success experience situation, undertook large-scale industrial production, the production of coke in blast furnace production of all. Through the coke test results and blast furnace operation, found that the mechanical strength of coke, thermal performance is improved, with the coal to reduce the cost of3.4yuan/ton, BF eight technology indicators, there are7main indexes are improved, an indicator associated with the use of conventional coal blending Coke’s flat.4、Petrographic blending method and theory after in our company in the production of the test and industrial application, proved to be viable, useful for a technology, be worth us to study deep and further promotion.