| OCR Text |
Show y 1 INTRODUrrTEON. One tIre of the most, dff'fi.cult, VH);Tld. is me'tall11rgica,l the, 'WaluahIe mect:aIs lea.d:." ib::' ir'on and. zinc' · •. the. aepar-a.t i the.' As er-e ahsalut:ely me t,ho,dL nece s.sar-y it, is. :praC':t of aeme: means recentJ.y These. are. c;ona.entra.t:,e all only fa:ir-Iy w'ell but, has- i.ts !imi tati.ons".. concen tz-e.ne.s are" no ,. t. obtainable, Ie.adL e·oneen-t,rate ccrrtad.ns c:onsid.eraD)le zarre J higlt runs the zi nc zf.nc in Qwe,r 8%. the, t as the and!.. the; nne These prcaduc"ts ir'an and. lead. in some.tdmes nrarketab-Ie' pay for the the' ma±'nly that oLean are se]?arat.ion serv·esc. was cencen t::ration aontain:ing whiah. em:ployedL p.ur:p.·o-se. ore m:ined, Until very , wet: i.6 of and, recovery cn (lom:plex suJtphi:d:e a ically w'o.rthle:s sand!, trherefo:re.: is pro.ble.ms which conrz-ont,a hut, the' Lead, smelte..Ts will not, lead:.. Like:w.i·s::e" c:o,nceni1ra_t;e,s', and. pena.li.ze the; zane sme L pay for' the: lead i.n the zinc: concent,raites for t,ers wi 11 rro.t, and. penali.ze for t.he iron. s'ince el ec.tz-o Iyti c.. d:.epo.si,t.i.on of zane from zinc t.he sul]?hat,e solutions 10 o.ks. as has, re:cent.1y shown if roast:fng and, the much pr-omi.se,. i.t., hydrometaIlurgical "treatment of these comp Iex sulphid.es WOUld. solve th.e :p.roblem. Utah has and the'refo.re sta.te. large ciepos.i ts the, of complex lea.ct-·zinc sulphides prohlem is. of sJ;?eci.al int,erest: to. thi.s The: work cover-ed by this the.sis wa.s done in ord.er |
