Arizona silver belt., 1878-09-26
sGLyRR oRNs.
How They Extract snver Prom Ores
 fn tAe old Country.
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ores are very numerous, ana itihef
 with the nature of the ore and the surrounding localities Some pro eesses which are admirably adapted for one locality may not be fit at all
 for others. and therefore iudicious selections have ta be made for differ-
 snt mmiug loealties out of those
 many silver exsfseson methods we fare oyer-Aooded w.h to-day And here it ls espeeAiiy l1ermans and her savans to Nh c great credit is due
 Ger .he many improved processes ifl meIaiiarg} oYer winch VIC command nov, aud 0v which ne are enabled to iaiHsin Bltb aa insignificant e0st by i lar more satisfying results than by she ame honorea-uow in Germany entirely discarded-qaicksilve anal gsmasioa and many other processes.
 Those methods now in sue -essfnl operation throughout tue oll world consist eA!eiy n usipg solutions for dissoiyng aud prseipitating out of il4e solutions tlle desired metals. and have been termed LixiYiarioH Pro- cesscs
 Che of the oldest of these is A.u gastine's Sais Lixiviation, 2 and is based on the fact that chloride of silver, either as found in nature or prolnced n roasting silver ores with salt, is entirely soluble ln a concen- uated solution of suit 1his fact Was discovered as early IS 1o32, and iu le4 } Augusuue utilized ths dis c'very oy iatyodueiug his new process for exuacang chloride of silver by means of salt, ana precipilatng the silver from this solution by metallic copper in the form of cement silver, winch by smeltlng in a crucible be- comes metallic silver. A process 7 Inch soon proved to be ever 50 much cheaper than ana lgamatioa, not con neeted with any danger to the healtk  0f tie laborers and winch at tbe same tine admitted of extracting all osher metals contained in the ore, while the per centage of silver brought out was higher than in any ot the old time methods, and the eoss insignificant No expensve machinery was necessary, for ali he used was a roaster and tub.
 A. second process for such silver ores which contain rather much cop per is furnished, is the so-called
 Coppsrstone Extraction Proeess. The ore reduced to fine grmui les is subjected to roasting in the free air, which IS to be followed after the ad- ditiOn of one to six per cent salt to a second finishing roasting The silver which was contained in tbe ore combined wI.h copper has now be- come chloride of silver, which Is treated in conformity ts tae Angus tue Process.
 The cheapest of all- but lot alsays applicable process, is LIergogcl's Water Lixiviation. " TLe silver ores to be worked by this process have to contain 8 higb per centage of sul- phus, copper, anu a small one of lroa By simply roasting the ores. the there!u contained sllvei forms a vitfol of sEver For tue heat up- piled to the ore las disengaged sul- phuric 4c.d winch attacks .be silver and brings t into q state of siiverI vhol, which B perfectly soluble iu| water mixed vita a litIle sulpharISl acid, and a copper bar $ all taas is necdad go preeipisate the silver
 4 fOdfsh aud hflh means of ex- tFsctng chloride of silver, which nol to be forgotten IS always formed by foAsan5 me ore siii salt, IS fousd n the soiatloA oF eltier su0-sulph oE soda or sab suipa@te of lime. as advised by P4tera and Kiss. Eilber metboa has tae sdyaDsaga aser con- centratee solution of salt ihas t dis- solves chloride of silver far more readily. Bssides. is che bulk of tue hqulds by far smaller of which in- ! stance never must be los, gbs Of in iocallties were water is source.
 l1coantries now where c0nimefciafi acids can be procured cheap hxivia- ton wi1n salphurlc acid is resorted Lo as means of extracting silver ohyer visro which E formed in ths psoeess is then treated as above stated
 4 snyloT must be apparent to syery flttl gent man chat the above