Mineral Matter Transformations and Slagging in a Semi-Industrial Furnace

摘要

A three-day slagging trial is reported which has been performed in the 2.5 MW semi-industrial sized IFRF Furnace No. 1. In the trial the build-up of ash deposits on deposit probes has been followed while simultaneously the transformations of the coal-ash minerals in the furnace were monitored. The objective was to relate the nature of the deposits to the changes in the minerals prior to deposition, so that the mechanism of deposit formation should be further clarified. However, the trial was performed on a scale that the results would also reveal which of the furnace parameters are central in deposit formation in full-sized furnaces. It was thus anticipated that the trial would also provide information on an empirical level to be used in the improvement of design and operation of full-sized boilers with respect to slagging.