abstraction of cupper

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Abstraction ofcupper.(malachite

and azurite).

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 The leaching of oxide copper ocontaining malachite and azuri

which is the unique copperminerals in the ore, by aqueouammonia solution has been

studied.Azuriteormalachite blue.Cu(C!)"

(!#)"

$Cu"(%de

de

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 The main important parameters in ammonleaching of malachite ore are determined aleaching time, ammonia'ammonium

concentration ratio, p#, solid'liquid ratio, letemperature, and particle size. !ptimum leconditions from malachite or azurite ore bammonia'ammonium carbonate solution a

found as ammonia'ammonium carbonateconcentrations

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$ *#+!#-. $ (*#+)"C! solid'liquid ratio //- g'mleaching times /"- min stirring speed -- rpm leachintemperature " 1C particle size finer than +- 2m. $or345 of copper was e6ecti7ely reco7ered.

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%uring the leaching, copper dissol7es asin the form of Cu(*#)+" complex ion,

whereas gangue minerals do not reactwith ammonia.

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0eaching of machite and azuritewhith acid sulfuric.

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 The e6ects of leaching time, stirring speed, acid concentration, soratio, reaction temperature, and particle size of the ore were in7est

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. 8sing the best conditions, the copper recowas nearly 3+5 at " 1C and 335 at 4- 1C/4- min leaching. %issolution of malachiteduring the leaching was described by alogarithmic function, y9a ln(x)b.

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:xtraction de sil7er, zinc, andlead.

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 A process for non;ferrous metals production from complex sulphidcontaining copper, lead, of zinc, sil7er and'or gold which comprisessaid ore and sub<ecting it to a =otation operation for obtaining a buconcentrate of the non;ferrous metals minerals and for separating the pyrite as a =otation tail, slurrying said concentrate in water in s

as to obtain a predetermined solid;liquid ratio and sub<ecting said soxidation leach in a stirred pressure reactor, at an oxygen partial pthe range of from about to / ?g'cm" g and a temperature in thefrom about /-1 to "-1 C.

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 for complete oxidation of metal sulphides to sulphates, separatingreaction mixture into a solid residue containing ferric oxide, lead suprecious metals, and a leaching liquor containing sulphuric acid, cosulphate and zinc sulphate, neutralizing the free sulphuric acid consaid leaching liquor with grounded limestone to a @nal p# in the ran

from about /. to "..

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 remo7ing precipitated gypsum from solution, reco7ering copperby cementation or sol7ent extraction and electrowinning,leaching lead, sil7er and gold from the said solid residue by astrong chloride solution containing calcium chloride at atemperature in the range of about -1 to 3-1 C. at a p# in therange of from about B.- to /.- and in the presence of about /gram per liter of ferric chloride, reco7ering lead, sil7er and gold

from the brine solution after solid remo7al by cementation withscrap zinc, mixing the lead free brine solution containing the zinused in lead cementation with the zinc bearing solution from thecopper reco7ery operation, and reco7ery zinc from the resultingsolution by sol7ent extraction and electrowinning.

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0in>s and bibligraphy

http''pierre.f>it.hr'hd>i'cabeq'pdf'/B+"--'Cabeq5"-"--;-+.pd

http''www.sciencedirect.com'science'article'pii'--/B/3+3--"+

http''www.sciencedirect.com'science'article'pii'D--+4E-+--/4

http''www.sciencedirect.com'science'article'pii'D--+4E---"3/

http''www.google.com'patents'8D+"3B"