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F. C. ItnNDRICit, 8. W. WALTHR. D. UfIDBLL, <br />IILn~¢er ~ Sup•t of smelter ~n0 AfeullurRlst SuperlntenAeat of Mlne~ <br />THE SAN JUAN <br />SMELTING AND REFINING COMPANY <br />„~```i_' <br />..~'~ <br />,~ <br />~~. , , <br />,I <br />1 <br />,_ _~__ <br />Sit.\'Ii1tT0\, COLO., Tantlai'y 2, 190j. <br />Gcur~i C>!i;•rr. Presidcu7: <br />The San Ju;m Smelting & Refining Compare}•'s smelter utilizes p}•ritic smelting as the basis ui <br />operation. \\"bile this iurm of smelting is largel}~ u+etl in the \Vest, it is particularh• suitable for the <br />copper ;uxl iron ores of the counn•, as :unph• tlemoua[rued h}• the success of the company. The method <br />ui procedure is to mix the ores purchased from carious sources along n~ith the ores irum the companc•s <br />uu•n mines in such a nruuter that one ore mac contain the necessan• constituents to aid ur smelt another, <br />therebc :n~oiding, ;ts iar as possible, the use of barren (lux, w the gr~.u enhanc~~nent vi profit. The sul- <br />phides in the ores, during the action of smelting, are oxidized b}~ means of a large volume of heated blast, <br />bcu being tlericed through such oxitlizatiun to a degree allu\cing a large curufilntent in the percentage <br />ni cuitl}• cul:e ortlinarih• required. 'I'bis oxidized iron cunthines tt~ith the quartz, iornting slag as \caste, <br />and the sulphur is tul;ltilizcd as sulphuric acid n ts. <br />The product prutlucetl is tennetl matte, \chich cuusists ui the copper, gold antl silver iormerlc <br />contained in tlic urc. 'Phis matte represents a concentration ui about tj tuns creole into I ton matte. <br />and contains ;o per cent. and up\cartls copper, :ts \ccll as high gultl and silt er \•alues. 'I'bis is shipped <br />to Xcsr 1•urlt iar refining. Pyritic smelting is ;t situple, el9icient methutl, amen;tble to a \ride scope <br />ui urea. and can be cuntluctetl un line iar cheaper ;uxl more eFiecti\•c than an}~ other, avoiding, as <br />it due?, the necessity ui costly crushing ;uttl ruastim„ plants, its installation :uul operation is cheaper <br />and its trnurige capacity greater than ordinary. <br />It is highh~ desirable iar a compauc, u\cning large mines, to smelt its o\cn ore, lacing as it does <br />the excessive Freight char},res un Deer t; tuns crude ore ;ts \ccll as the high cost of treatment as <br />char;;ed by custom pl:utts un the same-besides obtaining the iull v:11ue iar the contents of the ore. <br />\vhich uther\cise n•uttld go as profits to a purchasin{,r smelter. The fact that the cumpatn• smelts its <br />otrn ore ntcros a s;n•ing of upa•artls ui $I j.oo per tun in their l lcnrietta ore alone, over anti above <br />what could be realized by shipping :uul selling crude ore. :\Isu by purchasing ore a practicalh• double <br />profit is ncule by enabling rts' smelting mixtures l.. be uhutined, greath• rethtcing the cost of stnelt- <br />ing both. <br />The iuliu\cing actual ligures. compiled irum the buolts oC 'fhe San iuan Smelting S kefining <br />C'u.. ;tee iustntcti\•e as to cults ;uxl prrrfits: <br />'1'utal cost ui smelling. per 2.} hours. t;o tuns ure ..............~:_~8.00 <br />I~rcight to Xca~ furl: rclinen•, to terns ucntc. ;u tili.3j.......... li;.jo <br />~. <br />t~ <br />~'. 'fatal cost ui snteltiag ;uul dispuding ..i urute ..............~;gi t.jo <br />s',_ , i Clr S3.i~3 per tun ore. <br />~' <br />:. .. ~ :lveragc tre:ument charge received per tun me buught...........~+ C.Gj <br />••~ J)i•jo <br />~_.- -,~ Cost of tttating t;u taus urc ................... :)iLjo <br />Daily profit through sutclting ..................$ jaf.oo ur ~3.jo per ton. <br />to <br /> <br />