Record of ore-treatment by the Lockwood Copper Recovery Process at Butte, Montana ... at Vancouver B.C [microform]
Caption title
Public-domain full text preserved in the Mountain Man Mining Library. Original source: archive.org.
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Record of Ore-Treatment by the Lockwood Copper Recovery Process at Butte, Montana.
a atts Esha Mine—Butte-Duluth. Mining Co.—H. A. F. & A. F. Co., Lessees Under Receivers. Bee RES) eS ae Sa te ae Date Kind of Ore: Percentage of Commercial Minerals: July Oxide Silicate of Copper, Copper: 0.84"; Gold: oz. Silver: oz. 2 Crysocolla, Malachite, Azurite. Lead: % Zinc: a. lle Analysis: (No Analysis on File.)
Assayed for Copper Only, Showing 0.84’; Copper. a Ore Not Roasted Hours at Fahr.
Showing,— Copper as Sulphide Y Showing,— Copper as Oxide 0.84";
Remarks: This test was taken with very incomplete equipment. Partial record only. ee
Amount of charge 50 lbs. of ore Amount of solution 100 lbs. @ 60° Fahr. Amount of acid Ibs. 1 to 2 by weight.
Proportion of ore to solution, as 1 to 5.4 by volume. Percentage of acid, H.SO, 66° Baume 0.80 “ of solution Percentage of acid used Ge Proportion of acid regenerated % é Duration of agitation before current on ‘ 00 hours. ,. §&
Resulting solution Yeu §% § Duration of deposition 24 hours. ¢ 3 Total duration of agitation, including the time of deposition 24 hours. G “”: Direct current Average amperage 6.87 amperes. ° 2 9.3 Direct current Average voltage 2.19 volts. g on Direct current Total amperes used 422.89 amperes. gu _.9 33 Amount of copper deposited on cathodes Ibs. $58 fees Total amount of current used K.W.H. 2a"5 ses Amount current used per Ib. copper recovered K.W.H. sik ri Amount of copper recovered per K.W.H. used 0.80 Ibs. goat EE Percentage of recovery from solution 88 % Z az od Net recovery from ore 78 % of entire as-
Say content.
Copper remaining in tails, unextracted 0.10 %
66° B. acid used per ib. copper recovered 1.28 Ibs.
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, mesh $0. per Ib. of copper recovered Roasting $0. ea eee Zs Leaching, acid 66 deg. H SO, @ $ ton $0. fe Se “ Recovery, current @ per H.P. month plus per KWH used $0. 2S SS Power $0, “es “ Labor, men at $ per day $0. oe aa jcnsvaesnaees des nr arrsies Total cost of treatment $0. per Ib. of copper recovered ee t—“‘s™S ae Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper 99°% cu. -GLE
Record of Ore-Treatment by the Lockwood Copper Recovery Process at Butte, Montana. Se eseiacniad: Mind ecnttacted cette salted
Mine—Butte-Duluth. Mining Co.—H. A. F. & A. F. Co., Lessees Under Receivers.
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Date Kind of Ore: Percentage of Commercial Minerals:
Aug. Oxide Silicate of Copper, Copper: 1.97'% Gold: oz. Silver: oz. 8 Crysocolla, Azurite, Malachite, Lead: % Zinc: 4%
88686808080 SSS Analysis: (Analysis Not on File.)
Assayed for Copper Only, Showing 1.97% Copper. sss SSS
Current Efficiency, 50.8. .
Ore Not Roasted Hours at Fahr. Showing,— Copper as Sulphide % Showing,— Copper as Oxide 1.97% Remarks: Amount of charge 2,000 lbs. of ore. Amount of solution 3,000 lis. @ 60° Fahr. Amount of acid Ibs. 1 to 1.49 by weight. Proportion of ore to solution, as 1 to 3.03 by volume. Percentage of acid, H.SO, 66° Baume % Percentage of acid used % z Amount of acid regenerated per lb. of copper recovered 0.79 lbs. 3 3 Proportion of acid regenerated % 2 § 8 Duration of agitation before current on 00 hours. 3 E & Resulting solution ye et Se Duration of deposition 81 hours. §$ 2 Total duration of agitation, including the time of deposition 81 hours. rf 8 2 SS 8 Direct current Average amperage 2.70 amperes. & § “5 3 Direct current Average voltage 1.81 volts. 322.4 5 s Direct current _Total amperes used amperes. $738 sigs g Amount of copper deposited on cathodes Ibs. 534 £3 ge - Total amount of current used... : 39,584 K.W.H. Sazeeiee E Amount current used per lb. copper recovered K.W.H. "8 § Ha &§ Amount of copper recovered per K.W.H. used 0.80 Ibs. E6268 Percentage of recovery from solution 90.30 % Net recovery from ore 81. % of entire as-
Sa3’ content. 0.19 %
Net 1.95 lbs. 2.74 lbs. (assuming that all is lost). a eS eee
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Copper remaining in tails, unextracted
66° B. acid used per lb. copper recovered
Crushing, 20 mesh $0.01250 per lb. of copper recov .red Roasting . eee aE ges Leaching, acid 66 deg. H,SO, @ $30 ton pee xs Recovery, current @ $1 per H.P. month, plus $0.0061 per KWH used... ELE es 2 Power (Conn. HP. 300) (KWH $0.0098) . e007 50 te Labor, 5 men at $7.00 per day $0:02000- Os a unc ppre sh Total cost of treatment ee $0.08535 per Ib. of copper recovered
Sanne eee en anes Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper 00.76 % ey GLC Mining costs, 30.030 per lb. of copper recovered. Above etc., $0.006 per Ib. of copper recovered. vg N. B.—All above figures based on 1918 war-time costs.
Record of Ore-Treatment by the Lockwood Copper Recovery Process at Butte, Montana.
Mine—Butte-Duluth. Mining Co.—H. A. F. & A. F., Lessees Under Receivers.
Date Kind of Ore: Percentage of Commercial Minerals:
Aug. Oxide Silicate of Copper, Copper: 1.5‘; Gold: oz. Silver: oz. 18 Crysocolla, Azurite, Malachite. Lead: ‘% Zinc: %
Analysis: (Analysis Not on File.) Assayed for Copper Only, Showing 1.5‘. Copper.
Ore Not Roasted Hours at Fahr. Showing,— Copper as Sulphide % Showing.— Copper as Oxide 1.5%
Remarks: Outside Engineer took this test, furnished us only part of his record.
Amount of charge 2,000 lbs. of ore. Amount of solution : 3,000 Ibs. Amount of acid Ibs. Proportion of ore to solution, as to Percentage of acid, H.SO, 66° Baume Ye Percentage of acid used % Proportion of acid regenerated % 3 Duration of agitation before current on hours. & Resulting solution Yo cu. £ Duration of deposition hours. 4 Total duration of agitation, including the time of deposition hours. Direct current Average amperage Amperes. .:3 Direct current Average voltage volts. Bz Direct current Total amperes used amperes. 3, Amount of copper deposited on cathodeg Ibs. S32 Tot 11 amount of current used K.W.H. 23¢ Amount current used per lb. copper recovered : K.W.H. ret Amount of copper recovered per K.W.H. used 0.70 lbs. Be Percentage of recovery from solution 3 % od Net recovery from ore 85 % of entire as-
: Say content. Copper remaining in tails, unextracted %
66° B. acid used per Ib. copper recovered... eccessssnnennnnnnnene 2.5 Ibs.
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, -35 wets. Se $0.0125 per Ib. of copper recovered
Roasting... $0. “ Leaching, acid 66 deg. ‘H. SO, @ $28. 00 ton... $0. 0350 “ “ “ Recovery, current @ $1 per ‘HP. month, $0.061 per KWH used : _.$0.0140 “ “ “ Power mines : $0. 0100 “ “ “ Labor, 9 men at $5 & $6 per day... os _$0.0200 “ “ “ “ Total cost of treatment. : .$0.0915 per Ib. of copper recovered
Tne eeeeeEeEltUYEE Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper 99.76% cu. Mining costs $0.030 per lb. copper recovered. Above etc. 0.006 per lb. copper recovered. N.B.—All above figures based on war-time costs GHD
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Current Density, ‘Average 2.25 Amperes per sq. ft.
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Record of Ore-Treatment by the Lockwood Copper Recovery Process at Vancouver, B. C. Min'ng Co.—N. Explor. Co.
Mine—Texada Island, B. C.
Date Kind of Ore: Percentage of Commercial Minerals: May Sulphide, Chalcopyrite, Pyrite in Copper : 2.88% Gold: oz. Silver: oz. 17 Gangue of Calcium Iron Garnet. Lead: ‘% Zinc: % Analysis: Insoluble . 58.51‘; Iron 14.04°% Magnesia 0.00°% Alumina 0.31'% Lime 10.02‘; Oxygen, Loss and Copper 2.88% Sulphur 3.97% Undetermined _..10.27% Ore Roasted 9 Hours at 1200° Fahr. Showing,— Copper as Sulphide 0.11% Showing,— Copper as Oxide 2.60%
Remarks: Total copper present in assay after roast: 2.71%
Amount of charge 1,000 Ibs. of ore. Amount of solution ; 3,000 Ibs. Amount of acid ... Sa 60 lbs. Proportion of ore to solution, as i to—3 Percentage of acid, H,SO, 66° Baume 2.0 % of solution. Percentage of acid used i Proportion of acid regenerated % Duration of agitation before current on 4 hours. 1.44 %H.SO,
Resulting solution . 0.431 % cu. Duration of deposition ce Saat even emine SS 61 hours Total duration of agitation, including the time of deposition 65 hours Direct current Average amperage amperes, Direct current Average voltage 2.1 volts. Direct. current... Total amperes used 5428.9 amperes. Amount of copper deposited on cathodes 24.22 Ibs. Total amount of current USed.nccccccmemmnemmnnnenes 11.617 K.W.H. Amount current used per Ib. copper recovered... 0.479 K.W.H. Amount of copper recovered per K.W.H. used 2.08 lbs. Percentage of recovery from solution 96.77 % Net recovery from OF o.com 89.39 % of entire as-
say content. Copper remaining in tails, unextracted SS 0.097018 % 66° B. acid used per lb. copper recovered... 1.56 lbs
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 meshaicccccmenenenen ——— $0.00700 per Ib. of copper recovered
LT eee eee See SS $0.00700
Leaching, acid 66 deg. H.SO, @ $30 ton... $0.02340 ““ 6: Recovery, current @ $0.01 per KWH used 90,00479 “ “+ se - iS 0 WSS eS SS SS SS Se $0.00700 “ “ Labor, 5 men at $6.00 per SS S0.006275— “
Total cost of treatment... $0.05544 per lb. of copper recovered
Mining costs, taxes, office—overhead, etc., extra, Assay of product, pure electrolytic copper 99.76 % PWT
Record of Ore-Treatment by the Lockwood Copper Recovery Process at Vancouver, B. C. Victoria, B. C.
Mine—Vancouver Island.
Mining Co.—L. A. S. Co.,
Daic Kind of Ore: Percentage of Commercial Minerals: Sept Sulphide Copper 1.12'; Gold: oz. Silver: oz. 13 Lead: % Zinc: % Analysis: Insoluble 49.15‘; Iron (FeO) 21.20'; Magnesia Trace Alumina 4.08', Lime (CaO) 14.55'; Oxygen, Loss and Copper 1.12% Sulphur 2.05'% Undetermined 7.85'% Ore Roasted 8 Hours at 1200° Fahr. Showing,— Copper as Sulphide 0.10° Showing,— Copper as Oxide 1.02° Showing,— Copper in Tails 0.02'; Remarks: Amount of charge 50 lbs. of ore. Amount of solution 300 lbs. Amount of acid 0.75 lbs. Proportion of ore to solution, as 1 to 6 Percentage of acid, H.SO, 66’ Baume 0.25 % of solution. Percentage of acid used 64.8 % Proportion of acid regenerated 35.2 % Duration of agitation before current on 2 hours. Resulting solution % cu. Duration of deposition 26 hours. Total duration of agitation, including the time of deposition 28 hours. Direct current Average amperage 6 amperes. Direct current Average voltage . 2.1 volts. Direct current Total amperes used amperes. Amount of copper deposited on cathodes 0.56 lbs. Total amount of current used... 0.327 K.W.H Amount current used per lb. copper recovered 0.654 K.W.H Amount of copper recovered per K.W.H. used 1.52 lbs. Percentage of recovery from solution 100. % Net recovery from ore 89.28 % of entire as- say content. Copper remaining in taiis, unextracted 0.02 % 1.5 Ibs.
66° B. acid used per lb. copper recovered
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 mesh
Roasting $0.01700 Leaching, acid 66 deg. ‘H SO, ‘@ $30.00 ton $0.02250 Recovery, current @ $0.01 per KWH used... $0.00654 eS en $0.00750 Labor, 5 men at $6.00 per day. $0.01500
“
“
$0.00705 per Ib.
of copper recovered
Total cost of treatment
Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper
..$0.07559 per lb. of copper recovered
99.76 % cu.
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Record of Ore-Treatment by the Lockwood Copper Recovery Process at Vancouver, B. C.
Mine---Contact, Nevada. Mining Co.—W. H. S. & Co., Seattle, Washington. Date Kind of Ore: Percentage of Commercial Minerals: Sept. Carbonate, Oxide and Copper 6.43', Gold: oz. Silver: oz. 27 Sulphide. Lead: ‘i Zine: % 1919 Complex Ore. Analysis: Insoluble _79.10'. Iron 3.73% Magnesia Trace Alumina 0.56% Lime 0.82; Oxygen, Loss and
Copper 6.43"; Sulphur 0.31% Undetermined 9.05";
Ore Roasted 2 Hours at 1400° Fahr. Showing,— Copper as Sulphide 0.15"; Showing,— Copper as Oxide 6.28°; Remarks: N. B.—Trial run only, treatment formula not worked out for best results.
Amount of charge 50 Ibs. of ore. Amount of solution 300 Ibs. Amount of acid 5 Ibs. Proportion of ore to solution, as lto 6 Percentage of acid, H.SO, 66° Baume 1.6 ‘% of solution. Percentage of acid used 0.77 % per 1% Cu. Proportion of acid regenerated 48. % Duration of agitation before current on 4 hours. Resulting solution . % cu. Duration of deposition 48 hours. Total duration of agitation, including the time of deposition 52 hours. Direct current Average amperage 28 amperes. Direct current Average voltage . 2.18 volts. Direct current Total amperes used amperes. Amount of copper deposited on cathodes 2.955 lbs. Total amount of current used 2.929 K.W.H. Amount current used per lb. copper recovered 0.99 K.W.H. Amount of copper recovered per K.W.H. used 1.02 Ibs. Percentage of recovery from solution 100. % Net recovery from ore ; 91.91 % of entire as- say content. Copper remaining in tails, unextracted... 0.52 % 66° B. acid used per lb. copper recovered 1.69 Ibs.
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 mesh... .$0.00700 per Ib. of copper recovered Roasting $0.00560 “ Leaching, acid 66 deg. H., SO, @ $30 ton... 2 ee Sz: Recovery, current @ $0.01 per KWH used —— oe ss Power — $0.00750 “66 68 “ “ Labor, 5 men at $6. 00 per day... $0.00394 “ “ Ot COS OF COGN e a $0.05930 per Ib. of copper recovered
Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper... 99.76 % cu. GLC
Record of Ore-T1 nent by the Lockwood Copper Recovery Process at Vancouver, B. C.
Mine—-Regal, Princeton, B. C Mining Co.—W. C. M. & Co.
Date Kind of Ore: Percentage of Commercial Minerals:
Sept Sulphide Copper 1.92; Gold: Tr, Silver: 0,.31oz.
12 Lead: Ge Zinc: %
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Analysis: Insoluble — 77.72‘. lron 6.30'; Magnesia 3.71% Alumina 2.10', Lime 2.65‘; Oxygen, Loss and Copper 1.92 Sulphur 1.44', Undetermined 4.16)
Ore Roasted 8 Hours at 1250 Fahr.
Showing,— Copper as Sulphide 0.09"; Showing,— Copper as Oxide 1.83%
Remarks; . Sr SS Amount of charge 1,000 lbs. of ore. Amount of solution 3,000 Ibs. Amount of acid 20 Ibs. Proportion of ore to solution, as Percentage of acid, H.SO, 66 Baume 1.0 % of solution Percentage of acid used 65.0 % Proportion of acid regenerated 35.0 % Duration of agitation before current on 3 hours. Stock 1.005 “% cu.
Resulting solution 1.588 % cu. Duration of deposition . 26 hours. Total duration of agitation, including the time of deposition 29 hours. Direct current Average amperage 242.0 amperes. Direct current Average voltage 2.07 volts. Direct current Total amperes used amperes. Amount of copper deposited on cathodes 18.3 Ibs. Total amount of current used 13.04 K.W.H. Amount current used per Ib. copper recovered 0.712 K.W.H. Amount of copper recovered per K.W.H. used 1.40 Ibs. Percentage of recovery from solution 99.9 % Net recovery from ore 94.26 % of entire as-
say content.
Copper remaining in tails, unextracted 0.11 %
66° B. acid used per Ib. copper recovered 1.63 Ibs.
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Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 mesh $0.00700 per lb. of copper recovered Roasting $0.00750 “ “ “ Leaching, acid 66 deg. H.SO, @ $30.00 ton $0.02245 “ Recovery, current @ $0.01 per KWH used $0.00712 “ Power $0.00750 “66 68 “ “ Total cost of treatment... $0.05976 per lb. of copper recovered
Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper... 99.76 % cu. PWT
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Record of Ore- Treatment by the Lockwood Copper Recovery Process at Vancouver, B. C. Seatac Aine Alten Seta
Mine—Regal, Princeton, B Cc Mining Co.—W. C. M. & Co. Date Kind of Ore: Percentage of Commercial Minerals: Sept. Sulphide Copper 1.92°; Gold: oz. Silver: oz. 1 Lead: % Zine: % Analysis: Insoluble ..77.72'; Iron 6.30': Magnesia 71 Alumina 2.10% Line 2.65: Oxygen, Loss and Copper 1,92 Sulphur 1.44% Undetermined 4.16% as Ore Roasted 8 Hours at 1200° Fahr. Showing,— Copper as Sulphide 0.15% Showing,— Copper as Oxide 1.77% Remarks: Eee Amount of charge 1,000 lbs. of ore. Amount of solution 3,000 Ibs. Amount of acid 35 lbs. Proportion of ore to solution, as Se Percentage of acid, H,SO, 66° Baume 1.16 % of solution. Percentage of acid used 65.0 % Proportion of acid regenerated 35.0 % Duration of agitation before current on 2 hours. Stock 1.056 % cu. Resulting solution 1.632 % cu. Duration of deposition... 24 hours. Total duration of agitation, including the time of deposition 26 hours. Direct current Average amperage 225.4 amperes. Direct current Average voltage 2.08 volts. Direct current Total amperes used 5409.6 amperes. Amount of copper deposited on cathodes 17.2 lbs. Total amount of current used... ; 11.25 K.W.H. Amount current used per Ib. copper recovered. 0.654 K.W.H. Amount of copper recovered per K.W.H. used 1.53 lbs. Percentage of recovery from solution 98.24 % Net recovery from OF@.. conn s 89.58 % of entire as- say content. Copper remaining in tails, unextracted nnn C.20 % 66° B. acid used per lb. copper recovered... 2.3 Ibs.
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 mesh tae .$0.00750 per Ib. of copper recovered Roasting . $0.00750 “ “ “ Leaching, acid 66 deg. i SO, @ $30 ton. as $0. 03450 “ “ “ “ Recovery, current 01 KWH used... 90.00654 “““ “ Py Power... ee “ Total cost of: treatnent 0.06934 per lb. of copper recovered
Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper... 99.76 % cu. PWT
Record of Ore-Treatment by the Lockwood Copper Recovery Process at Vancouver, B. C.
Mine—Regal, Princeton, B. C. Mining Co.—W. C. M. & Co.
Date Kind of Ore: Percentage of Commercial Minerals:
Sept. Sulphide Copper 1.9% Gold: oz. Silver: oz.
23 Lead: ‘% Zinc: 4%
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Analysis: Insoluble 77.72% Iron sweeeee 3 O% Magnesia 0. cccun3:71% Alumina ... 2.10'% Lime rants A. 4) - Oxygen, Loss and Copper 1.92'% Sulphur 0 44 Undetermined 4.16%
—e6e_e_Ke—eg2—€00N0N0NNSSSsSvwwax*Onma9@wsSsSaaS——aaan Ore Roasted 8 Hours at 1200° Fahr.
Showing,— Copper as Sulphide .. 0.09% Showing,— Copper as Oxide... 1.83'%
Remarks: SS Amount of charge aaa 1,000 Ibs of ore. Amount of solution Sparen 3,000 Ibs. Amount of acid oo. Steet eee oe ees eS a 30 lbs. Proportion of ore to solution, as oe SS Percentage of acid, H.SO, 66° Baume epeenees Fis vaniesinietsa tases : 1.0 % of solution. Percentage of acid used... ee ; 70.0 % Proportion of acid regenerated... - ; 30.0 % Duration of agitation before current on 2 hours.
Resulting solution 00000000 .. SA 1.92 % cu. Duration of deposition. nila sissecgnbcnoeoncaaunsamsae 24 hours. Total duration of egitation, including the time of deposition 26 hours. Direct current... Average amperage a 242 amperes, Direct current... Average voltage 2.08 volts. Direct current wl Otal amperes used SIR Re 5808 amperes. Amount of copper deposited on cathodes...” 18.3 Ibs. Total amount of current used. ee! wee OF “LW. Amount current used per lb. copper recovered... oe 0.712 K.W.H. Amount of copper recovered per K.W.H. used caaerieas 1.40 lbs. Perce..cage of recovery from solution... ne ee 100. % Dt Mets hak ee 94.26 % of entire as-
say content.
Copper remaining in tails, unextracted aa 0.11 %
66° B. acid used per lb. copper recovered... — 1.63 Ibs.
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Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 mesh TES $0.00700 per lb. of copper recovered irmcmcnesincinOOTGO. 4s nan eee
ry, current @ $0.01 per KWH used... $0.00712 “ “ . Se 90.00750 9 2: x oie Let tee s Total cost of treatment... sunnnnnnnnnnnnnnnnne 05976 per lb. of copper recovered Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper 99.76 % cu. GLC
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Record of Ore-Treatment by the Lockwood Copper Recovery Frocess at Vancouver, B. C.
Mine—Regal, Princeton, B. C. Mining Co.—W. C. M. & Co. Date Kind of Ore: Percentage of Commercial Minerals: Sept. wulphide Copper 2.39°; Gold: Tr. Silver : 0.310z, Lead: % Zinc: % S3_e—aa aS —— Analysis: Insoluble ...77.72% Iron ssccacrenresercs MOE Mag” >sia ... 3.71% Alumina 2.10% Lime 2.65% Oxygen, Loss and Copper 2.39% Sulphur 1.44% Undetermined 3.69% 8800S Ore Roasted 8 Hours at 1200° Fahr. Showing,— Copper as Sulphide... 0.21% Showing,— Copper as Oxide... 2.18% (or Sulphate) Remarks: SSS SSS Amount of charge . 1,000 Ibs. of ore. Amount of solution ; 2 3,000 lbs. Amount of acid ce ee re mane ae 40 Ibs. Proportion of ore to solution, as — 1 to 3 Percentage of acid, H.SO, 66° Baume eae 1.3 % of solution. Percentage of acid used... 70.0 % Proportion of acid regenerated... 30.0 % Duration of agitation before current on. 144 hours, 1.4% % cu. 25 hours.
261% hours. 284 amperes. 2.1 volts.
7100 amperes. 21.8 Ibs.
95.05 % of entire as- say content. Copper remaining in tails, unextracted os 0.1183 % 66° B. acid used per Ib. copper recovered. 1.8 lbs.
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 meshww veses§$0,00750 per Ib. of copper recovered ee. SSS SSS 90;00750 —“ “ Leaching, acid 66 deg. H.SO, @ $30 ton... $0.02700 “ “ Recovery, current @ $0.01 per KWH used... $0.00675 e Power Sunabnaseafuansda ic eiscoatispesdbatacvkGike vesonaaaptinaesaaniaiacaie $0.00700 “6 68 “ “ Labor, 5 men at $6.00 per day $0.00627
Total cost of treatment... $0.06202 per Ib. of copper recovered ess
Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electroly*.c coppert 99.76 % cu. GLC
Record of Ore-Treatment by the Lockwood Copper Recovery Process at Vancouver, B. C.
Mine—Parsons Mine. Mining Co.—P. M. Co., near Capitan, New Mexico, U.S. A. Date Kind ui Ore: Percentage of Commercial Minerals: March Quartzite, Heavily Stained by Copper: 10.75‘; Gold: oz. Silver: oz. 1920 Ferric Oxide, and Showing Lead: ‘% Zinc: 4%
Azurite, Malachite, Tenorite and Some Sulphides.
Analysis: Insoluble 46.55‘, Iron 13.05', Magnesium Carbon- ate 5.01'; Alumina 0.35'; Lime— Calcium Carbon- ate 6.79'; Copper 10.75‘, Sulphur 4.14°, Oxygen, Loss and Undetermined 13.36‘; Ore Roasted 4 Hours at 1200 Fahr. Showing,— Copper as Sulphide 0.00; Showing,— Copper as Oxide 10.75% (or Sulphate) Remarks: Se Amount of charge 50 Ibs. of ore. Amount of solution : 200 lbs. Amount of acid 0... xe 6.25 lbs. Proportion of ore to solution, as lto 4 Percentage of acid, H.SO, 66° Baume 3.125 “% of solution. Percentage of acid used... 65.0 % Proportion of acid regenerated... 35.0 % Duration of agitation before current on 3 hours. Resulting solution . 5.5: 9: cu. Duration of deposition... : 99 hours. Total duration of agitation, including the time of deposition 102 hours. Direct current Average amperage 18 amperes. Direct current Average voltage . 2.2 volts. Direct current... Total amperes used 1782.0 amperes. Amount of copper deposited on cathodes 5.25 lbs. Total amount of current used... 3.92 K.W.H. Amount current used per Ib. copper recovered 0.746 K.W.H. Amount of copper recovered per K.W.H. used 1.34 Ibs. Percentage of recovery from solution 100.0 % Net recovery from ore... es 97.66 % of entire as- say content. Copper remaining in tails, unextracted__ ; 0.25 % 66° B. acid used per Ib. copper recovered... eae 1.19 %
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Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 mesh $0.00650 per Ib. of copper recovered LGU a ae ee $0.00650 “ Leaching, acid 66 deg. H.SO, @ $30 ton. SO.0f 785 ee & Recovery, current @ $0.01 per KWH used $0.00746. “ Es Power a $0.00750 “ Labor, 5 men at $6.00 per day SU.00142 S69 a Total cost of treatment... $0.04723 per lb. of copper recovered
ee FeCOVEr CM Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper 99.76 % cu. GLC
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Mine—Anaconda, a Mining Co.—A. M. Co., Whitehorse, Yukon T. SS ee eS StSnSEaeeseeSSsseetistushssen-cSesuisemnesionene.,
Date Kind of Ore: Percentage of Commercial Minerals: July Sulphide Copper: 8.92‘; Gold: oz. Silver: oz, 26 Lead: % Zinc: 4% —SNSNSSSSSSSSSMmSmSMmMmSS SSS Analysis: Insoluble . 63.22‘; Iron 9.14', Magnesia Trace Alumina 0.71% Lime 12.03‘; Oxygen, Loss and Copper 8.92; Sulphur roomy 2 Undetermined 3.27% ——— SSS SS Ore Roasted 8 Hours at 1100° Fahr. Showing,— Copper as Sulphide 0.12% Showing,— Copper as Oxide 8.41% Showing,— Copper in Tails 0.51% Remarks: SS Amount of charge 2,000 lbs. of ore. Amount of solution oc 3,000 Ibs. Amount of acid . aane : 180 lbs. Proportion of ore to solution, as... 2to 3 Percentage of acid, H.SO, 66° Baume 6 “ of solution. Percentage of acid used aa 1 % per 1% cu. Proportion of acid regenerated... 40 % Duration of agitation before current on 3 hours. Resulting solution .. a as % cu. Duration of deposition. 94 hours. Total duration of agitation, including the time of deposition 97 hours. Direct current Average amperage 560 amperes, Direct current ae Average voltage . 2.2 volts. Direct current... Total amperes used amperes. Amount of copper deposited on cathodes 167.91 lbs. Total amount of current used... 115.8 K.W.H. Amount current used per Ib. copper recovered... 0.689 K.W.H. Amount of copper recovered per K.W.H. used 1.45 lbs. Percentage of recovery from solution % Net recovery from ore... See : 94.28 % of entire as- say content. Copper remaining in tails, unextracted a 0.51 % 66° B. acid used per lb. copper recovered... Sa 1.06 lbs.
Costs of treatment, based on treating 100 tons of copper ore per day of 24 hours:
Crushing, 20 mesh $0.00700 per Ib. of copper recovered Roasting. 5 90.00750° nd a Leaching, acid 66 deg. H.SO, @ $30 ton... 0.01590. ee Recovery, current @ $0.01 per KWH used $0.00689 a oD) a a morse Labor, 5 men at $6.00 per day $0.00178
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Total cost of treatment... 5 $0.04657 per Ib. of copper recovered
——— Mining costs, taxes, office—overhead, etc., extra. Assay of product, pure electrolytic copper 99.76 % cu. GLC
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