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Show MIAMI COPPER IS MAKING CHANGES IN MILLING EQUIPMENT Despite the fact that experiments are be In mad by all the biff low grade porphyry por-phyry producing prop rt lea In tnauim of ore. It frequently occura that mom, of tha davlcea ara not a success. Awarding to tha follow. nic statement siren out from tha eastern otTtcee of the company :t up-pears up-pears that Mlani! Copper ha I juikI It i aeceseary to snake aoma alt;railona :n I Ha new plant. After having been given a thorough tast tha Burch roll Inatalletl ; the fourth unit of tha Miami Copper con-pany'a con-pany'a concentrator have provil unsatisfactory unsatis-factory for that particular or i. No 4 unit, however, will be retained for rune. time to carry on other ex perl menu, while No. a and will be eovlpped with Chilean mil la aa soon aa poaslble and operations started theitn. Miami la now treating 1MM ton of ore day In the first three sections of the mill and the recovery has improved to about 7 per cent. J. P. Channing. vice prealdent n3 consulting engineer, feels very conflict that his earlier prediction of an 80 per cent recovery wtlf be fully rea 1 1 sed be'ore long. Sections 1, 1 and 3 were equipped with the Chilean mills while befo. ft and were equipped the rolls were Installed in Nwrv tor eji per I men tat pttrwoseej with re sulfa outlined above. Some of Miami's copper has already found Its way to market, aUnouk'n the amount haa been email as the production haa been under way birt a short lime. The concentrates from Miami's nt'll hive been ahlpped under contract to the Greene-Cananea -smelter, from- which point the product haa again crossed tbe Mexican boundary en route to the Ilarl-tan Ilarl-tan refinery of the lnternatl nal 8molt Ing and Refining company. Thus far we understand the eUrs of Miami copper have been handled by tha United Metals Selling company, a subsidiary of the Amalgamated Copper companv i Before the end of the year Miami mU should be running full blast, all six lui-naces lui-naces being In :. Deration and a full complement com-plement or 1000 tone of ore being put through the concentrator datlv This should mean an output of 40.000,000 pounds of copper a year |