| Show I I i MAMMOTH PLANT i IN CALIfORNIA ji J Something About Smelter Where il p Centennial Eureka Ores l t May Be Treated IiI IiII i ij j I MINE BIG COPPER PRODUCER ER tM kt iY fil nUu hits Has Been to 10 t silo l 3 i J t Tho mammoth smelter of the United j V States In tea Smelting Mining T company In lit i Shasta Shastri county California I tho iho subject ct of or o an Interesting arti Icle In th tho current number of ut 0 tho the MIn MIny y and Scientific Press Tho iio development of ot thin th smelter 8 the tho writer Is characteristic of ot th the rapid growth of ot the tho copper mining Industry In Shasta county This Thill enter enterprise enterprise 1 prise was wn started about three years yearn ago by ho tho development oC of the tho mine 1 which Is ii situated ut LU a n distance of ot 13 feet teet from the tTe smelter nl at an nn elevation of 2500 feet teet above 1100 It Tho The Theore ore Is carried over ov r nn nil aerial tramway ft which tramway discharges Into bins t j from which tho the oro ore IB Is loaded Into nto the j Limestone O In hi II hauled to tho the thol l smelter from tho the quarry an electric road connecting this Quarry With the i smelter meller ore and coke colto are aro j brought from the outside the tho railroad r t i running over the tho top pf or t the ro re 4 g bins and discharging Into them t H The profile between the tho mine and tho the smeller la Is difficult and tho the sticky char character character j acter of tho ore oro also alee renders the ox ax i j oJ method of transport unreliable I and to meet tho the demands of oC tho ed smelting works now nO being j constructed In consequence tho the aerial system will soon oon I lie be b and anda 3 n a 1 gravity Incline used In conjunction f f 1 with electricity and steam railroads t The terminal tormina machinery for tor the former I rj will necessarily bo he massive mus for fOI the In Ini i dma Is feet long with a 1 vertical drop of or 1700 feet CeolOn On this slope v which has baa a IL varying grade two stand ij urd gape gage cars of ot nearly noarl 20 O tons capa i f i city will be bo operated tho the brake energy being partly absorbed by toy driving a 2 compressor 3 i The Mammoth mine which supplies o tho the ores ore Is ono one of DC a serl s of ot 1 I messes distributed In a suc sue succession cession of rhyolite flows of or pr DevOn DovOn 1 c Inn uge along the west Vest fildo of ot the tho Bac i tJ f riVer No N proof Is established I t that these the so ore oro bodies arc are confined to i any imy distinct lava ava and the tho various flows IV it tj havo hiwa not t been clearly differentiated Ore Oro f deposition has lifis occurred by p the total replacement of ot blocks of ot v 1 bounded by h tI anil ci Within se so blocks block II the or ore oro ho fre frek 1 k i show but hut little trace of o the tho thel l original rock although In III some Home cases I tho the quartz can bo be I 1 At tho the Mammoth mine the oro ore Is a n aj nt t j pyrite containing from Crom 3 I to 12 1 per cent of COPl and Ind carrying a t uni uniform form Quantity of preplans preCIous metals to o th the value of to 13 3 pr p r ton lUll a n factor which materially adds odds to 10 tho the prosperity enterprise during the vagaries of the tho copper market Many of the Ilia ore oro bodies of ot Shasta county II assume enormous proportions Iii and ore are remarkable for tor or their uniformity t ty tot of character char and comparatively co livelY shallow 8 hn I low on depth rho Tha Mammoth ranks among I FI the largo large copper mines that have been developed in III the tho United States durIng durin the last decade and I tho ho otc ore bodies of ut tho the district have havo added lidded notably to tu tho the h known copper resources of or the tho world j being 11 surpassed only on by b the tho enormous low grade deposits of Gingham rind and Ely I and possibly tho th rich lodes Iode In Iii course ot at development In the tho Katanga Katana district of ot the tho Concessions In ecu cen Africa The This value of the ore block blocked blocke If ed e out at lit the tho Mammoth WOK was t reported O to exceed but this EJ must now bo be modified In III view of tho thoi i lower prices prIce for the tho metalS metal tJ At the Mammoth smelter from front to lena of ot quartz Is rp required d per H day layl the company finding tho the local lorol supply of custom c ore oro altogether er Insufficient to moot meet this demand demond baa h recently built n a I road to toj tot j t the Quartz Hill mine which has haR been heen loosed leased for far a n Icing period This deposit J consists of at a It series of nt iulo lenses lens i of oC carrying from II U 1 to 16 6 0 In Ingold Ingold j gold and about 93 per ntH cent silica tile tho 11 latter Jatter being purer uror than tho the majority of lie local ores oress i s hitherto a IL 20 0 to 30 o per Por cent matte matto mattei i has been heen the tho product of ot tho hO smelter il at Jennett this beIng shipped to Utah f to supply Auppl tho demand for tor or tile Iron t that Is la mixed J with tho the or arM oras s of or Ringham Of at tho the three Ij I aces at present III in service ono one lute has a n u stool wat Iou tou to which Is Ts Tall t excellent results So satisfactory 1111 I o has this tills Improvement been boen in III pro pru r 3 venting heavy Incrustation and con consequent Consequent sequent freezing that It H will soon ho 11 Adopted on all nil the tha furnaces o A light r crust erist IB is constantly forming on tho up 1 per part of or tho furnace but hut tIlls this soon noon f falls oft In O not only loCI does do It pro vent tho th thick and I bent quent or low mw capacity that Is III 11 t usual with tho brisk brick tops but tItle thiu S tl tOil lop also forms onus orm n i 1 scale scalo j of it sufficient thickness to cause e It to In tok k fell fall hack back Into tho Ihl lie furnace Instead cf c r f being carried upward OH ns H t Tills This IB Is nn an Important development In 11 j t construction Tho TIte smelter smaller plant In is much en fn i i and aile It It t Is expected that lint nil all the tho t lO will w II bo ho completed In III Jon Jan nary 1908 Two are aro being belo added those are uro BO ro by b ISO so Inch eel H with tops tolls und and sot set tlora tI off dt 16 I 6 foot feet aria and an u In 10 tup till The Tho brick lops of tho old will ni also u o ho replaced lo with tops IS |
