Development work of laboratory test methods is presented for autogenou
s grinding, done in cooperation between Outokumpu Mining Services and
Technical Research Centre of Finland. The test methods and their devel
oped applications are described and the main results are discussed. Th
e possibilities to use the test results in planning of pilot plant tri
als and in the design of full scale autogenous comminution circuits ar
e also discussed. The latest results are compared to earlier reference
data.