| Show NEW COPPER PROCESS Plant in Coeur Is Operating on New Lines The following description of a simple process precess for extracting copper from car carbonate carbonate carbonate bonate ores in the tho Snowstorm mine in the dAlene dAbene district be profitably adopted in southern Idaho Idah says sars a north northern northern northera ern era exchange The Snowstorm mill as developed by b Dr Edwards a former president of the University of Washington Is one of the best and yet et simplest methods of treating copper carbonate ores Its efficiency in saving the copper values s averages about 37 sr 9 per cent Tiie ibe Process Explained The ore as it first comes from the mine is crushed to a powder It is then run into agitators where It is mixed with a 10 percent per cent solution of sulphuric acid H SOl and a solution of chloride of ot lime Ca 0 O Cl CI The sulphuric acid acts on the copper in the ore and changes it Into a sulphate solution Ca Cu SOl The chloride of lime being used only in a small quantity has no on the copper but acts on the silver in the ore and changes it to silver chloride Ag AS Cl CI which is a solid Thus the silver Is kept from going of in a solution with the cop copper copper copper per From these agitators which are three in number the copper sulphate solution goes through a series of ci six settling tanks which tend t nd to mix the solution well and collect all of ot the copper After this the solution is run into a tank containing old railroad i Iron and the copper precipitates on the Iron in an amorphous form The copper is then washed from the rails by bya b ba a hose and run through a hydraulic press where the water is pressed out and the is ready to ship It runs from 53 o 9 per cent to OS IS per cent pure Treating for Silver In treating for the silver siler the tailings of to te copper ore which contain the silver in the solid chloride form torm are run into the agitators where a sodium phate Nat Nail 52 S 03 OS solution is added to t dissolve the silver The silver solution car ear carrying silver Ag 52 03 is 18 run through settling tanks for the same sam purpose as the copper solution From the settlers the solution is run into laundries I where a man is continually making tests tes of its strength in silver sliver The UThe man then adds a sodium sulphide solution Na a S Si in proportion to the sil nI silver silver nIver ver strength which precipitates the sil nil silver silver ver and throws thrown it down In tn the form of silver sliver sulphide Ag S 5 This precipitate i of 0 silver is then run Tun through a filter I where the silver sliver is separated and col eel collected being then ready read for shipment The mill has a capacity of 85 5 tons in ina Ina Ina a shift and is giving employment tf t to If i or 17 men largely largel a good class of labor babor The ore runs 34 3 f to 4 Yo per cent copper and from five fhe to seven ounces in silver l r In addition the mine is sending 0 tons a day to the smelter |
