Expert systems have proved to be excellent tools for the control of mi
neral processes. An expert system based on on-line classification of t
he ore type has been designed and is described in. this paper The neur
al approach to computation has emerged in recent years for dealing wit
h the sort of problems for which more conventional solutions have prov
en ineffective. In the study a comparison between the on-line cluster
algorithm and the Kohonen feature map for ore type classification is p
resented. The study was carried out with measurement data from the Out
okumpu Hitura mine.