Development of a novel methodology to characterise preferential grade by size deportment and its operational significance

摘要: Abstract Over the last 30 years average grade of ore bodies has significantly decreased while proportion waste removal in many cases more than doubled. This turn led to a major increase energy consumption and decrease productivity across mining operations. Metal preconcentration at coarse scale (10–100 mm) by screening potential reverse decreasing trends through early rejection uneconomic material prior intensive comminution. feed grades using exploits propensity certain ores preferentially deport metal into specific size fractions during breakage. phenomenon is referred as preferential deportment. The exploitation response involves generation multiple streams with different content post screening. Streams can be engineered for characteristics suitable processing destination (eg: waste, leach, mill). Preferential data obtained an extensive belt cut sampling campaign after primary crushing been used develop method define samples that are amenable size. amenability changes depending on cut-off grade, magnitude mass contained individual screen products. Outcomes this work will support short term operational implementation.