. Transactions. ater proved to be correct for conditions in the 5000-ton plant,as shown by the summary in Table 19. The most economical solution to discard is that containing the great-est quantity of impurity and the least quantity of free acid per unit 60 FIRST YEAR OF LEACHING BY THE NEW CORNELIA COPPER CO. of copper. For the first 7 months of operation, neutral advance was themost desirable to discard. This solution averaged 3 per cent, copper, to per cent, free H2SO4, and per cent, total iron, of to per cent, is present as ferric iron. An attempt was made toprecipi
. Transactions. ater proved to be correct for conditions in the 5000-ton plant,as shown by the summary in Table 19. The most economical solution to discard is that containing the great-est quantity of impurity and the least quantity of free acid per unit 60 FIRST YEAR OF LEACHING BY THE NEW CORNELIA COPPER CO. of copper. For the first 7 months of operation, neutral advance was themost desirable to discard. This solution averaged 3 per cent, copper, to per cent, free H2SO4, and per cent, total iron, of to per cent, is present as ferric iron. An attempt was made toprecipitate the copper from this solution on heavy scrap, but the action Table 19.—Discard Solutions Gallons perMinute for24 Hours May, 1917 June, 1917 July, 1917 August, .September, , , , , , March, 1918 April, 1918 Specific Gravity of Solution Total Iron Average, Number ofin Solution, Days, Leach- ChargesPer Cent. ing Period Excavated. was very sluggish. In addition to this difficult}, the launder spacedesigned to treat 30 gal. (113 1.) per min. proved to be the cost of producing cement copper is about 2 c. more per pound thanthat of electrolytic, it was of prime importance to reduce this amount to —Solutions going to Iron Precipitation Launders ,— Copper, Per Cent. H2SO4, Per Cent. Ferric Iron,Per Cent. Average Current Efficiency, Per Cent. In 1 i Out In Out In Out First bank Second bank Third bank i Fourth bank 2 06 All banks the minimum. Since when using neutral solution for discard nearlyone-third of the total copper production would be produced as cementcopper, an investigation was made to produce a solution containingthe greatest amount of impurities per unit of copper. During December, HENRY A. TOBELMANN AN
Size: 1777px × 1406px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
