Mining filling material

摘要

A filling material intended for underground mining is mixed together from a plurality of residue products and, by the addition of calcium chloride, is suitable primarily for pneumatic stowing. The filling material is mixed together from about 20% of washing and/or flotation wastes, 10% of wet gypsum from flue-gas desulphurisation plants, 70% of filter ash and binding water from flue-gas desulphurisation, the binding water containing more than 5% of calcium chloride.