On-line analysis of ash and sulphur contents in ROM and products is very important on the coal preparation plant operation, not only for the optimization of the coal process control but also as the counterplan to the environmental requirements which may become more restrictive in the near future; namely coal process has a variety of disturbances which cause significant short-term changes in the coal quality and in the preparation results.
In this article, present techniques and future trends of ash monitors and sulphur gauges developed so far are briefly surveyed.
