Bulletin . rushing, $; mixing,$; roasting and precipi-tation, $; melting andcasting, $; total, $ first cost of such aplant is estimated at about$50,000 and its life as fiveyears. Hence a depreciationcharge of 33 cents per ton ofore treated in the plant dur-ing its life should be at 10 per cent perannum on the investmentamounts to 16 cents per tonof ore treated. Summing up, the metal-lurgical costs per ton of orewould be: Chemicals $,and operation of plant $,total $ At $ per ton for mining, the entire cost per ton of ore minedand treated wo
Bulletin . rushing, $; mixing,$; roasting and precipi-tation, $; melting andcasting, $; total, $ first cost of such aplant is estimated at about$50,000 and its life as fiveyears. Hence a depreciationcharge of 33 cents per ton ofore treated in the plant dur-ing its life should be at 10 per cent perannum on the investmentamounts to 16 cents per tonof ore treated. Summing up, the metal-lurgical costs per ton of orewould be: Chemicals $,and operation of plant $,total $ At $ per ton for mining, the entire cost per ton of ore minedand treated would be as follows: Mining, $; metallurgical treat-ment, $; overhead expense, $, or a total cost of $ perton of ore treated. The value of the 180 pounds of lead recovered, at cents net(4 cents gross) per pound, would be $, yielding a profit of $ ton of ore treated, even under the somewhat high costs lead is very pure and does not need to be refined or desilverized,. Figure 13.—Flow sheet of mill for volatilization of sign figures of numbers and letters, see table onopposite page. OXIDIZED ORES OF \l>. 1 ] 7 so the deduction of rents per pound of lead from the markelquotation of 1 cents is somewhat excessive. With each increase cent per pound in the price of lead, the corresponding saving asis of operation. With a cost of $2 pel- ton, and 90 per centrecovery, a 10 per cent lead ore in normal times would yield a profitof $ per ton in a 100-ton mill working ..00 days per year, andth
Size: 1225px × 2040px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
