UPhando kwiTekhnoloji yoNyango lwangaphambili lweGolide iJolisa phambi kweCyanide Leaching

Ukuhluzwa kweCyanide kwiGold Concentrates yinkqubo eqhelekileyo yokuhluzwa kwegolide. Nangona kunjalo, ngenxa yobunzima be-ore, ukuhluzwa kwangaphambili kudla ngokufuneka ukuphucula ukusebenza kakuhle kokuhluzwa. Eli nqaku lijonga ngokucwangcisiweyo ubuchwepheshe bokuhluzwa kwangaphambili ngaphambi kokuhluzwa kweCyanide , lijolise ekunikeni isalathiso semveliso esebenzayo.

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 ezithe nkqo zisetyenziselwa ukususa ukungcola okufana neetships zomthi kunye neziqwenga zeplastiki. Ityala lokusetyenziswa kwi-concentrator ethile libonisa ukuba emva kokuvavanya, ukuvaleka kwezixhobo kuncitshiswa ngama-70%, kwaye ukulahleka kwe- cyanide kwi-adsorption kuncitshiswa ngama-5%.

3. Ukususwa kwe-Flotation Reagent

Kwi-flotation concentrates, inkqubo enamanqanaba amabini "yokugaywa kwakhona - ukususwa kwee-reagent" iyasetyenziswa ukuze kususwe ngempumelelo ii-flotation reagents ezifana ne-xanthate kunye ne-oyile yeNombolo 2. Idatha yezoshishino ibonisa ukuba emva kokususwa kwee-reagent, ukusetyenziswa kweSodium Cyanide kuncitshiswa ngama-35%, kwaye izinga lokutsalwa kweCarbon esebenzayo linyuswa 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 umthamo we-nitrate ye-lead uyi-0.5 kg/t, uxinzelelo lwee-ion ze-sulfide lunokwehliswa ngama-60%, kwaye izinga lokutsalwa kwe-leaching linyuswe nge-7%. Kwi-ore ethile ye-copper-gold, ukusetyenziswa kwe- sodium cyanide kuncitshiswa ngama-40% emva konyango lwangaphambi kokusebenzisa i-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.