The PWH circular stockpiling system with its careful material reclaiming properties was chosen after an in-depth study of all characteristics of known systems such as rectangular storage areas with different stacking systems and various methods of reclaiming working on the principles of drum or bucket wheel reclaimers.
The circular stockpile blending system has many advantages such as low investment cost reduced maintenance and operation cost, a high homogenising effect, continuous formation and reclaiming of the annular stockpile. However, it was the careful treatment of the highgrade, brittle anthracite that was the deciding factor for the placing of the order with PWH-
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