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Gold/Mining/Energy : Gold and Silver Juniors, Mid-tiers and Producers -- Ignore unavailable to you. Want to Upgrade?

To: GoldBull no bug here who wrote (20781)	9/11/2006 11:42:00 PM
From: E. Charters	Respond to of 78416

I think they should go to conveyor belts at 30 degrees. Or put the mill at the bottom of the mine and only lift the gold. On the other hand, putting aside the extree installation etc.. and time, the hoist cost from 15,000 feet @ 2000 fpm is only 150 hp/ton at 25% friction. A 15 ton skip that weighs 3 tons would need 2700 HP and @ 40% duty cycle would consume 900 HP continuous. That is 670 KW which is only 60 dollars per hour. You can afford to ignore hoisting costs of ore for a small mine. Of course at that depth that is good for only 1270 tons with continuous skipping, per day. 10,000 tons requires perhaps two skips and 8 times the power. So 500 dollars per hour is more like it. Your deep large mine @15K short tons per day could save 6.2 million per annum, if they placed the mill at the bottom of the mine.