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Pape 17 ~- <br />~~ - - - <br />savings were attributed to the addftlortal gdd recovery fdlowing cyankfe recovery. These values are quRe <br />consistent with those anticipated at the Gdden Goss Mlne. <br />SfmOar cost estimates were receittijr completed for two existing mining operations In the Untied States. The <br />tlrst mine !s a 15,000 ton/day operation exhlbtting n slurry }low of about 5,000 gpm and a free cyanide level <br />0(125 trig jl. The estimated caphal and operating costs were 53,500,000 and 50.31 /ton of ore processed, <br />respectively, A surtirnary o1 the costs are.preSented In Tables 13 and 14. Using a cost of 50.70/Ib for NaCN <br />and a 9096 recovery, the recoverable value of tyankie was about 50.59/ton. The net recoverable value was <br />about 50.28/ton or 51,200/day. These calculations did not take Into account either the mass of cyanide <br />present In the recyded and untreated decant water, or the royalty See. The corresponding operating costs <br />for chemical treatment would have ranged from about S1.OOd1.50/ton. <br />l.. TABLE 13 <br />ESTIMATED CAPITAL COST FOR CYANIDE RECOVERY <br />Stripping Towers <br />Total Cost _ <br />S 125,000 <br />Absorber Towers 125,000 <br />Tower Internals <br />Demisters 100.000 <br />Distributers 100,000 <br />Support Gratings 50,000 <br />.Packing _,._,...__...- .. -.- - - .;. _ 250,400..- <br />Reactors t00.000 <br />~` <br /> <br />Mixers 60,000 <br />Fans 75,000 <br />. _ :: H,SO~ Feed System_+ Storage ~ , ,, - _ _. ; .-..-.. -.._ ....: 50,000. , .. _ <br />... , <br />_. Ume Feed System.+ Storage _._. __ __. `105,000 . <br />- --- - - <br />r: ; <br />NaOH Feed System + Storage 20.000 <br />Subtotal Equipment Costs 51,160,000 <br />installation Factor _ x 3.0 <br />TOTAL CAPITAL COST S3,aeo,o0o <br />