Arizona republican., 1914-06-28
PHELPs-DoDGE
Now Test Plant for Low Grade Ores
 at Copper Queen Mine

By the end of June, it is anticipated the test plant of the Copper Queen will be turned over to the low grade ores opened in the new development near the surface in the last year, says the Bisbee Review This plant rep resents in capacity 100 tons daily, the usual section capacity of full con centrator unit. The presumption is there will be, in addition to the mill and table equipment of this plant, an oil Notation and teaching plant of sufficient size to enable practical op- eratiOns on ore for test purposes.
 Incidentally, it has been known for some time that the operation of these plants is intended to be very thor ough as to investigation of the re- quirements of the ores that are opened and that are to be mined. It is known that there are in the low grade bodies several varieties of rock and that the ultimate concentratOr will handle each of these in specially designed sections of the mill, the highest possible re- turns thus being secured from all the material mined.
 With the test plant going, the ad- vance findings through laboratory work that has been carried on will be rap idly amplified by the practical results that will be obtained and carefully noted in full detail. By the end of the year, and possibly considerably earlier, the company will have in hand a sufficient amount of information as to actual treatment results delivered by the several types of equipment to enable the going ahead with plans for and construction of the real concen- trating plant that is to be put up
 This plant will doubtless be in way of erection early in next year. Its size is, of course, yet to be determined by the findings made in practical treat ment of the ores in the test work. Should Notation and teaching methods be found desirable for a considerable portion of the low grade, the size of the concentrator would be reduced approximately
 There have been started two pieces of work carrying more than ordinary interest for old timers in the district.
 The work referred to will be at the Czar and the Uncle Sam shafts, where the present hoists, gallows frames and other shaft equipment from the col lars up will be torn out to make way for the installation of new equipment. The latter will be larger and much more powerful than that now en- ployed and will place these shafts in position to deliver greatly increased service.
 One of the important features in connection with the work in prepara- tion for the installation of new hoists at the Czar and Uncle Sam is the further turnover which it marks to electric power in the district The The Copper Queen departures to cleo tricity in the last year have been con- siderable and it is evident now that they are working very rapidly around to the use of this power in all divis- ions
 The steel and other material for the construction of the secondary battery of seven McDougal roasters has been received at the Copper Queen Smelter and the work of erecting them will be started at once. The foundations are not yet in, owing to delay in the arri- val of necessary blue prints. The new battery, according to the management, will he merely supplemental to the equal number of roasters already in service and will not make for in- creased output, for the present at any rate.