Lipatlisiso ka Litheknoloji tsa Pretreatment of Gold Concentrates before Cyanide Leaching

Cyanide leaching ea Khauta e Hlollang ke mokhoa oa khale oa ho ntša khauta. Leha ho le joalo, ka lebaka la tlhaho e rarahaneng ea ores, Pherekano hangata ho hlokahala ho ntlafatsa ts'ebetso ea leaching. Sengoliloeng sena se ipapisitse le mahlale a pele a kalafo pele Cyanide Leaching, e ikemiselitseng ho fana ka litšupiso bakeng sa tlhahiso e sebetsang.

I. Physical Pretreatment Technologies

1. Ho Sila hamonate

Li-concentrate tsa khauta li theohile ho 325 mesh kapa ho feta ka lisebelisoa tse kang li-ball Mills ho arola ka botlalo liminerale tsa khauta tse tsoang ho gangue. Tloaelo ea morafo o itseng oa khauta e bontša hore ho sila hantle ho ka eketsa sebaka sa ho pepeseha ha khauta ka 40%, 'me sekhahla sa ho tsoa se ka eketseha ka 8-12%.

2. Ho Hlakola le ho Tlosa Tšila

Lisebelisoa tse kang linear vibrating screens li sebelisoa ho tlosa litšila tse kang lithapo tsa patsi le likhechana tsa polasetiki. Nyeoe ea kopo ka har'a concentrator e itseng e bonts'a hore kamora ho hlahlojoa, khafetsa ho koaloa ha lisebelisoa ho fokotseha ka 70%, le tahlehelo ea adsorption. cyanide e fokotsehile ka 5%.

3. Ho Tlosa Reagent ea Flotation

Bakeng sa li-flotation concentrates, ts'ebetso ea mekhahlelo e 'meli ea "regrinding - reagent remover" e amoheloa ho tlosa li-reagents tsa flotation tse kang xanthate le No. 2 oli. Lintlha tsa indasteri li bontša hore ka mor'a ho tlosoa ha reagent, tšebeliso ea Sodium cyanide e fokotsehile ka 35%, 'me sekhahla sa ho monya ha e butswe k'habone e eketsehile ka 15%.

II. Lik'hemik'hale tsa Pretreatment Technologies

1. Alkaline Pretreatment

Lime li eketsoa ho fetola pH ho 10-11. e le hore lintho tse kotsi tse kang zinki, arsenic le antimone li etsa matsoai a qhibilihang. Ka mor'a hore e sebelisoe morafong o itseng oa khauta o nang le arsenic, tšebeliso ea cyanide e fokotsehile ho tloha ho 12 kg / t ho ea ho 6.5 kg / t, 'me sekhahla sa leaching se eketsoa ka 9%.

2. Phekolo ea Oxidation

• Moea Oxidation

Ka ho kenya moea le ho sisinyeha ho etsa oxidize lintho tse fokotsang, morafong o itseng oa khauta oa mofuta oa pyrrhotite, ka mor'a ho phekoloa esale pele, matla a makhasi a eketseha ho tloha ho -150 mV ho ea ho +200 mV, 'me nako ea cyanidation e khutsufatsoa ka 40%.

• Keketso ea Oxidants

Ha tekanyo ea nitrate ea lead e le 0.5 kg / t, mahloriso a li-ion tsa sulfide a ka fokotsoa ka 60%, 'me sekhahla sa leaching se eketsoa ka 7%. Setsing se itseng sa koporo-khauta, ho sebelisoa ha sodium cyanide e fokotsehile ka 40% ka mor'a ho phekoloa pele ka hydrogen peroxide.

3. Synergistic Leaching le Ammonia-Cyanide

Metsi a ammonia (a nang le motsoako oa 1-3%) a kenngoa ka har'a likhalase tsa khauta tse nang le koporo ho etsa metsoako e tsitsitseng ea ammonia ea koporo. Liteko tsa indasteri li bonts'a hore sekhahla sa ho tsoa ha koporo se ka laoloa ka tlase ho 5%, 'me sekhahla sa ho tsoa ha khauta se eketsoa ka 12%.

III. Biological Pretreatment Technologies

Likokoana-hloko tse kang Thiobacillus ferrooxidans li sebelisetsoa ho senya liminerale tsa sulfide. Kamora matsatsi a 20 a bioloji oxidation morafong o itseng oa khauta, sekhahla sa ho bola sa pyrite se fihla ho 92%, 'me sekhahla sa ho tsoa ha khauta se eketsehile ho tloha ho 35% ho isa ho 88%. Theknoloji ena e na le molemo oa botsoalle ba tikoloho, empa nako ea phekolo e batla e le telele (matsatsi a 15-30).

IV. Litlhahiso tsa Khetho ea Ts'ebetso

Mokhoa oa ho lokisa esale pele o hloka ho khethoa ka botlalo ho latela mofuta oa ore:

• Bakeng sa ores e nang le sebabole se phahameng le arsenic e ngata, bioloji oxidation kapa ho besoa pele ho nako ho lokela ho sebelisoa ka ho khetheha.

• Bakeng sa likhahla tsa khauta tse nang le koporo, tsamaiso ea ammonia-cyanide e buelloa.

• Bakeng sa ho tsepamisa mohopolo oa flotation, phekolo ea ho tlosoa ha reagent e hloka ho matlafatsoa.

• Bakeng sa ores e tloaelehileng, mokhoa o kopantsoeng oa ho tsoa ha alkaline le ho eketsa oxidant o ka amoheloa.

fihlela qeto ena:

Tšebeliso e utloahalang ea mahlale a pelehi a ka ntlafatsa haholo phello ea cyanide leaching. Nakong e tlang, hoa hlokahala ho tsoela pele ho ithuta mekhoa e sebetsang hantle le e tlaase e kopantsoeng ea phekolo ea pele ho khothalletsa tsoelo-pele e tala ea mahlale a ho ntša khauta.