Cement Manufacturers Association (CMA)

Vincent Grosskopf Coal Mill Pte Ltd, Singapore One answer: We are not where we should be! With ‘everybody’ in the cement industry focussing decarbonisation, but with coal grinding systems still being used in the foreseeable future, the topic dealt with here must not be shoved into the background. There is a serious need for change here too. In the following text is explained what goes wrong with the coal grinding systems purchased by the industry and why and how it goes wrong. In the text, the word coal stands for coal, lignite and petcoke. The following text systems with a vertical roller mill (VRM) and in the VRM. systems mostly are operated with process air from a source that will provide for air with a low O percentage. Systems that work with clinker cooler air (21 % O ) exist. and explosion protection is even more relevant than for systems with process air with reduced O . The number of sources to which a cement producing organisation can turn (worldwide) when it intends to purchase a coal grinding system is not more than roughly 50. It could be expected that it makes a purchased separately, e.g. for the replacement of an older installation, compared with its purchase as part of a larger job, e.g. setting up a complete clinker production line. When a system is purchased separately, more attention can be paid to design matters. In practice, are not observed. Page 28 FIRE AND EXPLOSION PROTECTION OF COAL GRINDING SYSTEMS. WHERE ARE WE TODAY?