Hongxing Coal Grinding Mill Has Been Field Tested

The coal grinding mill  is the critical component of the fuel delivery system and is a major influence of combustion efficiency in the burner zone as well as the performance and efficiency of the furnace itself. As such the coal pulveriser is truly the "heart" of the combustion process for a coal-fired power station. This paper reports on the contribution of a number of material coal properties and machine operating parameters to the wear of vertical spindle mill components. This assists in the evaluation of mills and coals for particular duties and enables prediction of the likely changes in maintenance regime if these variables are changed. Coal abrasiveness was found to be the most critical coal property with moisture next in importance. This patented technology, which combines an increased resistance to wear and shocks, allows the company to offer solutions that are set apart from the standard steel and iron foundry products.Feed rate was of importance with some interesting interactive affects. Roll grinding pressure was by far the most important machine variable with recirculation and air/coal ratio of lesser importance. In general, coal pulverisers are designed to achieve the maximum rated capacity grinding a design coal with a grindability of 55 HGI and 8-12 per cent moisture and achieving a discharge fineness of 70 per cent passing a 200 mesh screen (74 micron) and 99.5 per cent passing a 50 mesh screen..To ensure quality and reliability, Hongxing"s coal grinding equipment has been field tested under the most severe and demanding operating conditions. From single components and repair parts to complete coal and coke pulverizing systems, Hongxing"s engineers can recommend the optimum solution to meet you specific needs. The entire grinding plant must therefore be shock-resistant and equipped with a number of explosion relief valves. When grinding low-explosive to moderately explosive coal types, the system may operate under non-inert...