UPhando kwiTekhnoloji yoNyango lwangaphambili lweGolide iJolisa phambi kweCyanide Leaching

ICyanide leaching of IGold Concentrates yinkqubo yakudala yokutsalwa kwegolide. Nangona kunjalo, ngenxa yobunzima bendalo ye-ores, Utyando kudla ngokufuneka ukuba kuphuculwe ukusebenza kakuhle kwe-leaching. Eli nqaku lidibanisa ngokucwangcisiweyo ngetekhnoloji yonyango ngaphambili I-Cyanide Leaching, ejonge ukubonelela ngereferensi yemveliso ebonakalayo.

I. Physical Pretreatment Technologies

1. UkuSila kakuhle

Ugxininiso lwegolide luculwa ukuya kuma-325 mesh okanye lula ngakumbi ngokusebenzisa izixhobo ezinje ngeebhola zokusila ukuze zohlulwe ngokupheleleyo iiminerali zegolide ezivela kwigangue. Ukwenziwa kumgodi othile wegolide kubonisa ukuba ukugaya kakuhle kunokunyusa indawo yokuvezwa kwegolide ngama-40%, kwaye izinga le-leaching linganyuswa nge-8-12%.

2. Ukuhlolwa kunye nokususwa kokungcola

Izixhobo ezifana nezikrini ezingcangcazelayo zisetyenziselwa ukususa ubumdaka obunje ngamaplanga kunye namaqhekeza eplastiki. Imeko yesicelo kwi-concentrator ethile ibonisa ukuba emva kokuhlolwa, ukuphindaphinda kokuvalwa kwezixhobo kuncitshiswa ngama-70%, kunye nokulahleka kwe-adsorption. i-cyanide ithotywe nge-5%.

3. Ukususwa kwe-Flotation Reagent

Ukugxilwa kwe-flotation, inkqubo yezigaba ezimbini "zokubuyisela kwakhona - ukususwa kwe-reagent" yamkelwe ngokufanelekileyo ukususa i-flotation reagents ezifana ne-xanthate kunye ne-2 yeoli. Idatha yezoshishino ibonisa ukuba emva kokususwa kwe-reagent, ukusetyenziswa kwe Isodium cyanide incitshiswa ngama-35%, kwaye izinga lokufunxwa kwe-activated ICarbon inyuswe nge-15%.

II. Ubuchwephesha boNyango lweMichiza

1. Unyango lweAlkaline

Ikalika yongezwa ukulungisa i-pH kwi-10-11. ukuze izinto eziyingozi ezifana nezinc, arsenic, kunye ne-antimony zenze iityuwa ezinyibilikayo. Emva kokusetyenziswa kwayo kwimigodi yegolide equkethe i-arsenic, ukusetyenziswa kwe-cyanide kuncitshiswe ukusuka kwi-12 kg / t ukuya kwi-6.5 kg / t, kwaye izinga le-leaching linyuka nge-9%.

2. Unyango lwe-Oxidation

• Umoya oxidation

Ngokufaka umoya kunye nokushukumisa ukuze kufakwe i-oxidize izinto ezinciphisayo, kumgodi wegolide wohlobo oluthile lwe-pyrrhotite, emva konyango lwangaphambili, amandla e-pulp ayanda ukusuka kwi -150 mV ukuya kwi-200 mV, kwaye ixesha le-cyanidation lifinyezwa ngama-40%.

• Ukongezwa kweeOxidants

Xa i-dosage ye-nitrate ye-lead i-0.5 kg / t, ukuxinwa kwe-sulfide ion kungancitshiswa ngo-60%, kwaye izinga lokukhupha linyuswe nge-7%. Kwintsimbi ethile yobhedu-yegolide, ukusetyenziswa kwe sodium cyanide iyancipha ngama-40% emva kokunyangwa kwangaphambili nge-hydrogen peroxide.

3. I-Synergistic Leaching ne-ammonia-Cyanide

Amanzi e-ammonia (kunye ne-concentration ye-1-3%) yongezwa kwi-concentrate yegolide ene-copper ukuze yenze i-ammonia ezinzile zobhedu. Uvavanyo lwemizi-mveliso lubonisa ukuba izinga le-copper leaching rate linokulawulwa ngaphantsi kwe-5%, kwaye izinga lokuphuma kwegolide linyuswe nge-12%.

III. I-Biological Pretreatment Technologies

Iimicroorganisms ezifana neThiobacillus ferrooxidans zisetyenziselwa ukubola iiminerali zesulfide. Emva kweentsuku ezingama-20 zebhayoloji oxidation kumgodi othile wegolide enyibilikayo, izinga lokubola kwepyrite lifikelela kuma-92%, kwaye izinga legolide lokuphuma linyuswe ukusuka kuma-35% ukuya kuma-88%. Le teknoloji inenzuzo yobungane bendalo, kodwa ixesha lonyango lide (iintsuku eziyi-15-30).

IV. Iingcebiso zoKhetho lweNkqubo

Inkqubo yokulungiswa kwangaphambili kufuneka ikhethwe ngokubanzi ngokohlobo lwentsimbi ekrwada:

• Kwizinto ezikrwada ezinesulfure ephezulu kunye nesiqulatho se-arsenic ephezulu, i-biological oxidation okanye ukuqhotswa kwangaphambili kufuneka kwamkelwe ngokukhethekileyo.

• Ukudibanisa igolide equkethe ubhedu, inkqubo ye-ammonia-cyanide iyacetyiswa.

• Ukugxila kwi-flotation, unyango lokususa i-reagent kufuneka luqiniswe.

• Kwi-ores eqhelekileyo, inkqubo edibeneyo ye-alkaline leaching kunye ne-oxidant supplement ingamkelwa.

Isiphelo:

Ukusetyenziswa okunengqiqo kobuchwepheshe bonyango lwangaphambili kunokuphucula kakhulu umphumo we-cyanide leaching. Kwixesha elizayo, kuyafuneka ukuqhubela phambili ngezifundo ezisebenzayo kunye nezisezantsi-zokusetyenziswa ezidityanisiweyo iinkqubo zonyango lwangaphambili ukukhuthaza uphuhliso lohlaza lobuchwephesha bokutsalwa kwegolide.