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Hello Guys
I'm experiencing some difficulties with pyrrotite ore grinding in the SAG mill. Ore has a bond work of about 15 kWh/t. We have a pebble crusher in close circuit with the SAG mill but throughput has been an issue due to ore hardness. Ball charge in the mill is in check. We have experimented with blending in a bit of calcrete and this seems to have improved grindability in the SAG mill. Is there any scientific explanation to this or was this just a mere coincidence?