Bisbee daily review., 1915-01-10
CONSTRUCTION IN ARIZONA 0F SIMPLIFYING
 IN 4
Activity has Marked Mines of State in Manner in Which They Have Built Plants for Ore Treatment.
MANY NEW PLANTS ARE
 SCATTERED OVER STATE
Miami, Clarksdale and Others Build-lmprovements Added to Several-Oldest Plants Make Good Showing.

Make Good Showing.
 Shelter construction m Arizona dur ing the past year har been very acc tive At Miami the International Smelling & Refining Co. is erecting plant designed principally 'nr roduc- ing the copper concentrates of that district Roasting will not. a a rule. be necessary; but five of u initial in- stallatiou of six Wedge furnaces are under erection for use in drying the concentrates prior to treatment i'm three reverberatory furnaces The matte will be poured into two oylin- drical containers and reduced to blis- ter copper in four basic-Hned convert CTS of the Great Falls type furnished l by the Power & Mining Machinery Co.,. together with two Beph & Me- 1 Gregor casting machines The smelter is directly across the gulch from the .arse new mill of the Inspiration Con. Copper Co, and also near the mill of the Miami Copper Co.
 Nearing completion at Clarkdale. Arizona. is the new sme'ter built to take Che place Of the old ameltar now operated by the United Verde Copper Co. at Jerome, a lev miles distant. This also includes a battery of Wedge furnaces six in number These are de- signed for roasting and win be fol- lowed in the smcItmg process by three reyerberatorv furnaces and blast tur- uaces and four stands of Alis-Cual- mers copper couverturs of the Great Falls type. basis lined. with the east ing machines of the same make This plant will treat principally crushed ore brought directly from the United Verde mine through a tunnel on the 1OOO-ft level opening to a short rau- road inc
 Among the older smelters operated by the American Smelling Refining Co. at Hayden, the Old Dominion Cop per Co. at Globe the shannon Copper Co. at Clifton, and the Detroit Copper Mining Co. at Morenci, there have been no changes of importance
 At the Ca met & Arizona Mining compauy's shelter in Douglas and the Arizona Mining company's smeIter in Clifton, both of which were new last year the arrangements for the eco, uomical handling and treatment of ore and concentrates have been per- fected under close, careful manage ment
 Iu the latter case the eight Heres hoff roasting furnaces have been strengthened and, portable Dutch-oyen furehearths added for kindliug and sustaining the fire when the sulphur content of the ore is not right for self roasting
 The plant Of the Copper queen Min ing Co, a PhelpsDodge interest at Douglas, Ariz., has been substantially improved A new crushing and stor- age plant for Bisbee ore is being erected and the addition of seven Me- Douglas furnaces gives tota. of six teen, all Of which were built by the Allis-C Chalmers Manufacturing Co., The smeltiug furnace and converter de- partmeuts remain unchanged. A leach iug plant is also being added and one of the roasters diverted to calcinmg ore 10 be treated in it
 Early iu the year the Cons. dated Arizona Smeltiug Co., began he work of removing its plant at Humboldt, Arizona. The equipment installed in the first unit included one roasting furnace and a reyerberatory The hearth dimensions of the latter were GO it by l9 ft The Wedge roaster is fitted with eight hearths including a drying hearth at the top. The average charge is 90 tons of concentrates, 30 tons of smelting ore and 25 tons of limestone; the average analysis of this charg eis copper, 6',; iron 2Of,; iusoluble, 34r, lime, l2D,; sulphur 2Orr. By roasting the sulphur content is reduced Co approximately 5.5',, al- though on some occasions it has bene allowed to go to as low as 42C, All though the furnace is equipped with oil burners which were used at first to heat the hearths the roasting is now conducted entirely without fuel