Show TREND OF ORE REDUCTION Metallurgical Progress Will Wiil Widely Distribute Smelting Industry One Ono thing that has tended to build up smelting centers and make long hauls of ore profitable Is the tho economy in smelting mixtures says sas Denver Ores and an M tain It is sometimes profitable to ship on em kind of ore hundreds of ot miles to a smelter where it can be mixed with an another anether other ether kind of oro ore brought perhaps hun hundreds di ds of miles from a different direction Thu the gold ores of oC Nevada Neva a are areM arent M nt to Suit Salt Lake Lako City to be mixed with I Ith th copper ores of Utah California and Colorado Without the copper ores or orli orad li had ad ores the ores cannot be smelted Copper matte Is sometimes shipped a n thousand miles or more mor Into Mexico to be used In smelting dry dr ores ors But although In smelting It may mA be necessary c essary sary ar to form mixtures of ores from widely separated sources this Is not true of 4 the reduction processes that come Into competition with smelting For example a large part of the ore now shipped out o or of Nevada when not free milling Is amenable to treatment by b the cyanide process As water is I developed and mills arc aro built this ore or will be handled at the mines and the only thing shipped will be bv JUon Various methods of separation by b which the tho copper and other Interfering com corn compounds pounds may maj be segregated are ar extending the tho scope of the cyanide process Con Concentration Concentration and separation are reducing the amount of waste material shipped and making it possible to distribute shipments ID U the best advantage Lead Lt nd concentrates go to the lead 1 ad smelters smelt rs and zinc concen concentrates concentrates concentrates to the zinc smelters The reduction reduction reduction tion is carried as far as possible with economy at the of production and the tho traffic Is reduced to an basis The separation of complex ores Into sim simple simple irn pie products and the use uso of ot processes in the extraction of or the precious metals from their ores are both tending toward the location at the mines of part or o all of ot the operations of ot reduction It may be fco expected that further progress in metallurgy will wUl tend In the same direction I that smelters drawing ores from distant mines will become of or less importance that the shipment of waste rock by rail will diminish Under such suh su h conditions there will bo be greater opportunities for tor custom mills roms or cooperative mills handling the ores of ot a single camp or district Their number Dumber Js Is increasing Furthermore metallurgical progress the line Une of ot smelting th use of or liquid and gaseous fuels in smelting and the consequent reduction in inthe inthe Inthe the amount of coke retired required In smelting operations may be expected to be favor favorable fa favorable vor able to the establishment and successful suet s ful operation of or local smelters Especially In I copper opper mining even now a smelting plant operated In connection with a single mine mineor or group of mines Is often practicable and with copper wire distribution of or cheap power and pipe line distribution of or cheap fuel there will probably be a decentralization decentralization in the smelting Industry |