Ntlafatso ea Sodium Cyanide Leaching ho Ores ea Khauta-Copper

Selelekela

Ho ntšoa ha khauta le koporo lirapeng tsa khauta le koporo ke mokhoa o rarahaneng. Cyanidation, haholo-holo ho sebelisa Sodium cyanide, haesale e le mokhoa o ka sehloohong oa ho ntša khauta. Leha ho le joalo, boteng ba koporo ka har'a li-ores tsena bo baka mathata a maholo ts'ebetsong ea cyanidation, e amang ho hlaphoheloa ha khauta. cyanide tshebediso. Poso ena ea blog e shebana le ntlafatso ea sodium Cyanide Leaching ka ore ea khauta ea koporo, ho hlahloba melao-motheo, liphephetso le litharollo tse ncha.

Melao-motheo ea Cyanide Leaching

Cyanide leaching e itšetlehile ka bokhoni bo ikhethang ba li-ion tsa cyanide ho etsa li-complexes tse tsitsitseng tse nang le khauta le silevera. Sodium cyanide, e qhibilihang haholo metsing 'me e batla e tsitsitse, e sebetsa e le eona ntho e ka sehloohong e hlabollang. Ha e qhibiliha ka metsing, e ntša li-ion tsa cyanide. Li-ion tsena li sebetsana le khauta boteng ba oksijene ka mokhoa oa electrochemical. Khauta e qala ka oxidized ebe e tlamelloa ke li-ion tsa cyanide ho etsa motsoako o qhibilihang, o lumellang ho ntšoa ha eona ho tloha ore.

Mathata a hlahisitsoeng ke Koporo ho Ores ea Khauta-Copper

Tšebeliso e eketsehileng ea Cyanide

Koporo e ka har'a ores ea khauta-copper e kopana le cyanide ho theha mefuta e fapaneng ea koporo-cyanide. Bakeng sa 1% ea koporo e sebetsang, hoo e ka bang 30 kg / t ea NaCN e ka jeoa. Tšebeliso ena e ngata ha e phahamisetse litšenyehelo tsa ts'ebetso ea ts'ebetso ea cyanidation feela empa e boetse e hloka taolo e hlokolosi ea ts'ebeliso ea cyanide.

Thibelo ea ho Leaching Khauta

Metsoako e phahameng ea li-complexes tsa koporo-cyanide ka tharollo ea leaching e ka fokotsa ho qhibiliha ha khauta. Ho feta moo, koporo e na le tšekamelo ea ho etsa likarolo tsa passivation holim'a likaroloana tsa khauta. Likarolo tsena li sebetsa e le litšitiso, li fokotsa ho kopana lipakeng tsa khauta le li-ion tsa cyanide, ka hona, li sitisa mokhoa oa ho ntšoa.

Maano a ho Ntlafatsa Sodium Cyanide Leaching ho Ores ea Khauta-Copper

Phekolo ea Pele ea Ores

• Mekhoa ea Karohano ea 'Mele: Mekhoa e kang karohano ea matla a khoheli, ho phaphamala, kapa karohano ea makenete e ka sebelisoa ho tsepamisa mohopolo pele ho ore. Ka ho khetha ka ho khetha karolo e kholo ea liminerale tsa koporo pele ho cyanidation, mekhoa ena e fokotsa bokahare ba koporo ka har'a thepa e tla etsoa leaching. Mohlala, ho phaphamala ho ka arola liminerale tsa sulfide tsa koporo ho tsoa ho ore e nang le khauta, ho fokotsa tšitiso ea koporo nakong ea cyanidation.

• Phekolo ea Oxidative: Ts'ebetso ea oxidative joalo ka ho besa, bio-oxidation, kapa khatello ea oxidation e sebetsa hantle ho qhaqha liminerale tsa sulfide le ho lokolla khauta e koetsoeng. Boemong ba khauta-copper sulfide ores, oxidative pretreatment ha e ntlafatse ho hlaphoheloa ha khauta feela empa hape e fokotsa phello e mpe ea koporo ho cyanidation. Ka mohlala, ho halika ho fetola liminerale tsa sulfide hore e be oxides, e leng ho etsang hore khauta e fumanehe habonolo ts'ebetsong ea cyanide leaching.

Ntlafatso ea Parameter ea Ts'ebetso

• Motsoako oa Cyanide: Ho khetholla sebaka se loketseng sa cyanide ke ntho ea bohlokoa. Le ha likhakanyo tse phahameng li ka eketsa ho qhibiliha ha khauta, li boetse li lebisa tšebelisong e feteletseng ea cyanide, haholo boteng ba koporo. Ho hlokahala mokhoa o leka-lekaneng, 'me maemong a mang, ho sebelisa motsoako o fokolang oa cyanide hammoho le metsoako e meng ho ka hlahisa liphello tse molemo.

• Taolo ea pH: Ho boloka boemo ba pH bo nepahetseng (hangata bo ka bang 9 - 12) tharollong ea leaching ho bohlokoa bakeng sa ts'ebetso ea cyanidation. Leaching ea khauta-copper ore, ho lokisa pH ho ka thusa ho laola sekhahla sa ho qhibiliha ha koporo le khauta. Ho theola pH hanyane ka nako e 'ngoe ho ka ntlafatsa leaching ea khauta ka ho hatella leaching ea koporo.

• Mocheso le Moferefere: Ho phahamisa mocheso ho ka potlakisa karabelo ea cyanide leaching, empa e na le meeli ea eona. Mocheso o feteletseng o ka eketsa ho fetoha ha cyanide le ho potlakisa oxidation ea eona hore e be lintho tse sa sebetseng haholo. Ho hloka botsitso ho lekaneng ho etsa bonnete ba hore ho kopana ho hotle har'a likaroloana tsa ore, tharollo ea cyanide le oksijene. Leha ho le joalo, ho ferekana ho feteletseng ho ka baka ho senyeha ho feteletseng le ho taboha ha thepa.

Tšebeliso ea li-additives

• Ammonia: Ho eketsa ammonia ts'ebetsong ea cyanidation ho ka thusa ho laola koporo ka ho etsa li-complexes tse tsitsitseng ka eona. Li-complex tsena li thibela ho thehoa ha metsoako e itseng ea koporo-cyanide e thibelang ho qhibiliha ha khauta. Leha ho le joalo, tšebeliso ea ammonia e hloka ho nahanisisoa ka hloko ka lebaka la chefo ea eona le ho feto-fetoha ha maemo, tse bakang likotsi tsa tikoloho.

• Glycine: Lipatlisiso tsa morao-rao li bontša hore glycine e ka sebelisoa hammoho le metsoako e tlaase ea cyanide ho ntša khauta, silevera le koporo ho tloha ore ea khauta-copper. Glycine complexes e nang le li-ion tsa cupric le cuprous, e khothalletsa ho qhibiliha ha koporo, 'me e ka qhala likarolo tsa passivation holim'a khauta le koporo. Mokhoa ona o ka fokotsa haholo tšebeliso ea cyanide ka bonyane 75%.

Case Studies

Ts'ebetso ea Meepo ea Japane

Ts'ebetso e nyane ea merafo Japane e ne e sebetsa ho eketsa ho hlaphoheloa ha khauta ho tsoa lerōleng le nang le koporo e ngata ka ho sebelisa cyanidation. Potolohong e fetileng ea cyanidation ka lithane tse 800 tsa lerōle (li-tailings tsa khauta), ba ile ba fumana lik'hilograma tse 1.3 tsa khauta e hloekileng ea 94% ka mor'a ho hlapolla. Ho ntlafatsa ho hlaphoheloa, ba sebelisitse kalaka ho eketsa pH le ammonia ho thusa ho tlosa koporo. Ho phaella moo, ba ile ba etsa ho hlapolla ha koporo ho tsoa k'habone pele ho elution ea khauta le ho lokisa motlakase le amperage nakong ea elution ea khauta le boemo ba electrode. Mehato ena e thusitse ho eketsa ho hlaphoheloa ha khauta.

Australian Low-Grade Copper-Gold Ore

Letsoapo la khauta la koporo la boemo bo tlaase la Australia le ile la sebetsoa ka mokhoa oa “motsoako oa ho phaphamala—ho arola koporo le sebabole—ho hloekisetsa khauta ka sebabole”. Ka ho ntlafatsa li-reagents tsa flotation (ho sebelisa motsoako oa butyl xanthate le ammonium dibutyl dithiophosphate e le ba bokellang) le mokhoa oa ho phalla (mehato e mengata ea ho senya le ho senya ka potoloho e koetsoeng), ba fumane kopo ea koporo ea 82.46% le ho fumana khauta e feletseng ea 91.87%.

fihlela qeto e

optimizing the sodium cyanide ts'ebetso ea ho tsoa ka har'a ores ea khauta-copper e bohlokoa bakeng sa ho ntlafatsa ts'ebetso ea moruo le ts'ebetso ea tikoloho ea merafo ea khauta. Ka ho utloisisa liphephetso tse hlahisoang ke koporo le ho kenya ts'ebetsong maano a joalo ka pele ho kalafo, ts'ebetso ea ts'ebetso ea parameter, le ts'ebeliso ea li-additives, ntlafatso e kholo ea ho khutlisa khauta le tšebeliso ea cyanide e ka finyelloa. Lipatlisiso tsa nakong e tlang sebakeng sena li ka 'na tsa lebisa tlhokomelo ho nts'etsopele ea mekhoa e sebetsang hantle le e se nang botsoalle ho tikoloho, ho fokotsa le ho feta phello ea ts'ebetso ea khauta ea koporo tikolohong ha e ntse e eketsa ho ntšoa ha lisebelisoa.