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Show oo ENGINEERS VISIT ILL ID SMELTER Salt Lake, March S Through the courtesy of the Utah Copper company and the Garfield Smelting company, members of the Utah section of the American Institute of Mining Engineers Engi-neers inspected both plants yesterday. yester-day. Special guides wero In attendance attend-ance and conducted them through the Arthur mill and the Garfield smelter. The variouH metallurgical processos In operation wero described in detail. In the neighborhood of 100 engineers v. ere in attendance. The engineers left Salt Lake In a special train at 1 p. m. over the Salt Lake Route, arriving ar-riving at the Arthur mill at 1.55 p m. Frank Janney, Jr , Thomas Jan- ney, Frank A. Bird ana otner guides conducted the party through the mill. The foundry in which the various vari-ous castings are mado was visited, as well as the machine shop, the unloading unload-ing bins and the coarse crushing department. de-partment. The ore being treated was followed into the fine crushing plant, from where it is fed automatically to the concentrating tables, where the mineral Is literally Jerked out of the crushed rock. Judged from the attention it attracted, attract-ed, tho most interesting portion of the mill was the flotation department. The guides described how the finely crushed ore is fed Into tho flotation units with a certain percentage of oil, churned up and how the oil, adhering ad-hering to the finely divided metallic particles, causes them to rise to the surface, where thoy are skimmed off with mechanical skimmers. Tho rock Itself sinks to the bottom and is washed wash-ed out to the tailings pond. The concentrates con-centrates are washed out to tho loading load-ing bins bj' water flowing in launders to the loading bins, from where It Is loaded Into the railroad cars by a traveling crane and shipped to the smelter at Garfield. From the mill the party was taken by the special train to tho Garfield Bmolter and conducted through It by General Manager C. W. Whitley, R. F. Baker, Superintendent W. D. Leonard Leon-ard and other guides. The unloading bins wero visited, tho bedding bins where the concentrates are prepared for smelting, tho sampling bins, the roasters whero the sulphur In their immediate vicinity caused considerable consider-able sneezing, the powdered coal plant, the rcverbcratory furnaces, blast furnaces and finally tho Cottrell plant, In which the smoke and fumes are washed by electricity and freed from all metallic particles. The roverberatory furnaces, using finely powdered coal blown into tho furnaces by an air blast, created considerable con-siderable comment among the engineers, engi-neers, as did the Cottrell plant, where the metallic elements were precipitated precipi-tated by uso of electricity. The party par-ty leturned to Salt Lake at 5:35 p. m. |