Mill PreformanceJust changing the subject to reflect the thread. Too many RE's lol.
Castling1 wrote :
"It's all about tonnage & grade baby, when mined tonnages start to fade then so to do delivered grades to the mill due to low grade feed makeup, this is classic miner knee jerk reaction."
I dont follow your thinking at all on this, as you could have a low feed rate of high grade ore, as opposed to a high rate feed of low gade ore..
If a mill has, say a designed max of 100 tph throughput of raw ore and the grade is at say 1 gram of Gold per Tonne of raw crushed ore, and then if the next ore grade delivery is at say 20 grams per Tonne, you would still get 100 tph of reject waste minus a few grams of Gold.
The system can handle the fluctuations.
The only way a Mill could be choked is if the mine operators have pushed the feed rate from the variable speed feeders under the stock pile to feed the Mill over the said 100 tph limit, and if the past owners were just banking owners, then they might have (in their stupidity) ordered a ramp up of feed to the Mill, hence an inefficient process that just processes mud.
All that is down steam from this Mill, ie physical and chemical separation with cyclones, flotation cells, and chemical circuits would have to cope for good or bad grades that would / should be monitored by the process plant operators in the contol room on site.
There are so many factors on the past owners that I will not even bother to look at, but after a brief look at the unreadable text flow sheets (symbols are fine) all looks good as a mine and process plant.
I have been in the mineral process industry for over 40 years and have also been involved in all of the projects that your CEO has done from Fiji to Australia, the last being Mineral Hill Gold project in Australia.
He knows Diamonds, Gold and is a electrical engineer, but a poor manager.
I watch from a distance out of interest, but some times one has to clarify issues that are getting out of hand.