Show MIXED ORES the treatment of mixed oroa of lead and zinc his always presented considerable dim cult and not mines yielding a largo of mineral have p oved from this baue alone but it is hoped tint the invention of mf cookson and sau deison of new bistle on line will ren dei the easy when aro containing lead with zinc and it may b alo and copper they first thoroughly roast the ore and then dissolve out the zinc lv means of acetic acid ibe copper if aar will also be dissolved and by the addition of metallic zinc to the solution the lead the the and can be by tho usual methods foi tho treatment ot ordinary lead ores for abo aiom the acetic solution lyd ropen sulphide is employed the acetic acid can be used aaen and again when treating a aio oio contain inar lead with antimony and it may bo desolvo he antimony ando out aiom the raw ore with sodium or other alk alino solution 1 ho lead and silver if an remain with ahn 8 angue and can be cpa rated by the usual processes for the ordinary oid inary lead 01 cs I 1 ho antimony sulphide stated from the solution bi tho addition oi the solution of antimony sulphide in or other alkaline sulphide obtained as abo 0 stated may bo made use ol 01 n the treatment of lead me oie iho mixed oc containing lead with cinc ischo lushly roasted and tho zinc is dissolved out aiom it with sul phuoc acid fo tho me sulphate t on urne of the before named antimony sulphide sulp hido la added zinc and antimony sulphate of the alk ill employed II 11 solution the mc sulphide can ba separated aiom the anti roon sulphide in wa s but bs pi efee enco the dissolve it out aiom the anti moi with wea acid and afterwards precipitate milk |