Kugadziridzwa kweSodium Cyanide Leaching muGoridhe-Mhangura Ores

ziviso

Kuburitsa goridhe nemhangura kubva mumatombo egoridhe-mhangura inzira yakaoma. Kubvisa goridhe kubva muzvinhu zvegoridhe-mhangura kwagara kuri nzira huru yekubvisa goridhe. Zvisinei, kuvapo kwemhangura mumatombo aya kunokonzera matambudziko makuru kumaitiro ekubvisa goridhe kubva muzvinhu zvegoridhe, zvichikanganisa kudzoreredzwa kwegoridhe uye kushandiswa kwecyanide . Chinyorwa ichi cheblog chinotarisa pakugadzirisa kushandiswa kwe sodium Cyanide Leaching mumatombo egoridhe-mhangura, ichiongorora misimboti, matambudziko, uye mhinduro itsva.

Nheyo dzeCyanide Leaching

Cyanide leaching inotsamira pane yakasarudzika kugona kweiyo cyanide ion kuumba yakagadzika ma complex ane goridhe nesirivha. Sodium cyanide, inonyungudika zvakanyanya mumvura uye yakagadzikana, inoshanda seyekutanga lixiviant. Kana yanyungudutswa mumvura, inoburitsa cyanide ions. Aya maion anoita negoridhe muhupo hweokisijeni kuburikidza nemaitiro e electrochemical. Goridhe rinotanga kugadzirwa oxidized yobva yasungwa neiyo cyanide kuti iite soluble complex, ichibvumira kutorwa kwayo kubva kune ore.

Matambudziko Anoitwa neMhangura muGold-Copper Ores

Kuwedzera kweCyanide Kushandiswa

Mhangura mugoridhe-mhangura ores inopindirana necyanide kugadzira akasiyana siyana emhangura-cyanide. Kune yega yega 1% yemhangura inoshanda iripo, ingangoita 30 kg/t yeNaCN inogona kudyiwa. Kushandiswa kwakanyanya uku hakungokwidziri mitengo yekushanda kweiyo cyanidation process asi kunodawo kungwarira manejimendi ekushandiswa kwecyanide.

Kudzivirirwa kweGoridhe Leaching

Yakanyanya kuwanda yemhangura-cyanide complexes mune leaching mhinduro inogona kuderedza kunyungudika kwegoridhe. Uyezve, mhangura ine tsika yekuumba passivation layers pamusoro pezvikamu zvegoridhe. Aya maturu anoita sezvipingamupinyi, achidzikisa kusangana pakati pegoridhe uye cyanide ions uye nekudaro zvichitadzisa maitiro ekubvisa.

Matanho eKukwirisa Sodium Cyanide Leaching muGoridhe-Mhangura Ores

Pretreatment of Ores

• Nzira Dzekuparadzanisa Zvinhu : Nzira dzakadai sekuparadzanisa simba remagetsi, kutenderera, kana kuparadzanisa magnetic dzinogona kushandiswa pakuisa dombo muvhu. Nekubvisa chikamu chikuru chezvicherwa zvemhangura usati waisa cyanidation, nzira idzi dzinoderedza huwandu hwemhangura muzvinhu zvichabviswa. Semuenzaniso, kutenderera kunogona kuparadzanisa zvicherwa zvemhangura kubva mugoridhe, zvichideredza kupindirana kwemhangura panguva yekuisa cyanidation.

• Kugadzirira Kubvisa Madhaka : Maitiro ekubvisa madhaka akadai sekugocha, kuoxidation, kana kuoxidation yepressure anoshanda mukuputsa zvicherwa zvesulfide uye kusunungura goridhe rakavharwa. Panyaya yegoridhe-copper sulfide ores, kuoxidation yekubvisa madhaka hakungobatsiri chete kudzoreredzwa kwegoridhe asiwo kunoderedza kukanganisa kwakaipa kwemhangura pacyanidation. Semuenzaniso, kugocha kunoshandura zvicherwa zvesulfide kuita maoxide, zvichiita kuti goridhe rive nyore kuburitswa necyanide leaching process.

Maitiro Parameter Optimization

• Kuwanda kweCyanide : Kuziva huwandu hwakakodzera hwecyanide kwakakosha. Kunyange zvazvo huwandu hwakawanda huchigona kuwedzera kunyungudika kwegoridhe, hunoitawo kuti pave nekushandiswa kwakawandisa kwecyanide, kunyanya kana paine mhangura. Nzira yakaringana inodiwa, uye mune dzimwe nguva, kushandisa huwandu hwakaderera hwecyanide pamwe chete nezvimwe zvinowedzera kunogona kupa mhedzisiro iri nani.

• Kudzora pH : Kuchengetedza pH yakakodzera (kazhinji inenge 9 - 12) mumushonga wekudonhedza mvura kwakakosha pakuita kuti itsvedzerere. Mukudonhedza goridhe-mhangura, kugadzirisa pH kunogona kubatsira kudzora mwero wekunyungudika kwemhangura negoridhe. Kuderedza pH zvishoma dzimwe nguva kunogona kuwedzera kudonhedza kwegoridhe nekudzora kudonhedza kwemhangura.

• Kupisa uye Kusagadzikana : Kukwidza tembiricha kunogona kukurumidzisa kuburitsa kwayakaita cyanide, asi kune miganhu yayo. Kupisa kwakanyanya kunogona kuwedzera kusashanda zvakanaka kwecyanide uye kukurumidzisa kuoxidation kwayo kuita zvinhu zvisingashande zvakanyanya. Kusagadzikana kwakakwana kunodiwa kuti ive nechokwadi chekuti zvidimbu zveore, cyanide solution, uye oxygen zvinosangana zvakanaka. Zvisinei, kusagadzikana kwakanyanya kunogona kukonzera kusakara kwakanyanya pamidziyo.

Kushandisa Additives

• Amoniya : Kuwedzera ammonia mukuita kwecyanidation kunogona kubatsira kudzora mhangura nekugadzira macomplex akagadzikana nayo. Macomplex aya anodzivirira kuumbwa kwemamwe macomplex emhangura-cyanide anodzivirira kunyungudika kwegoridhe. Zvisinei, kushandiswa kweammonia kunoda kutariswa zvakanyanya nekuda kwehupfu hwayo uye kusagadzikana kwayo, izvo zvinokonzera njodzi kunharaunda.

• Glycine : Ongororo ichangobva kuitwa inoratidza kuti glycine inogona kushandiswa pamwe chete ne cyanide shoma kuti ibudise goridhe, sirivha, uye mhangura kubva mugoridhe-mhangura. Glycine inosanganisa maion e cupric ne cuprous, inokurudzira kunyungudika kwemhangura, uye inogona kunyungudutsa zvidimbu zve passivation pamusoro pegoridhe nemhangura. Nzira iyi inogona kuderedza zvakanyanya kushandiswa kwe cyanide ne75%.

Case Studies

A Japanese Mining Operation

Kambani kadiki kekuchera muJapan kakanga kachishanda pakuwedzera kudzoserwa kwegoridhe kubva mumhangura yakapfuma vachishandisa cyanidation. Muchirongwa chekare checyanidation nematani 800 eguruva (goridhe rakatorwa), vakawana 1.3 kilos ye94% yegoridhe rakacheneswa mushure mekudzoserwa. Kuti vawedzere kudzoserwa, vakashandisa lime kuwedzera pH neammonia kubatsira kubvisa mhangura. Pamusoro pezvo, vakazobvisa mhangura muCarbon vasati vadzoserwa gold uye vakagadzirisa voltage neamperage panguva yekudzoserwa kwegoridhe uye nzvimbo yeelectrode. Matanho aya akabatsira mukuwedzera kudzoserwa kwegoridhe.

Australian Low-Grade Copper-Gold Ore

Chicherwa chegoridhe chemhangura chegiredhi yakaderera cheAustralia chakagadziriswa pachishandiswa nzira “yakavhenganiswa flotation—kuparadzanisa mhangura nesarufa—sarufa yakanyungudutswa yegoridhe”. Nekukwenenzvera flotation reagents (uchishandisa musanganiswa webutyl xanthate uye ammonium dibutyl dithiophosphate sevateresi) uye kuyerera kwemaitiro (matanho akawanda ekukoromoka uye kutsvaira mudunhu rakavharwa), vakawana kudzoreredzwa kwemhangura ye82.46% uye kudzoreredzwa kwegoridhe kwakazara kwe91.87%.

mhedziso

Kugadzirisa maitiro ekubvisa sodium cyanide mumatombo egoridhe-mhangura kwakakosha pakuvandudza hupfumi uye kuchengetedzeka kwenzvimbo yekuchera goridhe. Nekunzwisisa matambudziko anokonzerwa nemhangura uye kushandisa nzira dzakadai sekugadzirisa goridhe risati rasvika, kugadzirisa mashandiro enzira, uye kushandisa zvinowedzerwa, kuvandudzwa kukuru mukutora goridhe uye kushandiswa kwecyanide kunogona kuitwa. Tsvagiridzo yeramangwana munzvimbo iyi ingangotarisa pakugadzira nzira dzinoshanda uye dzisingakuvadzi nharaunda, zvichideredza kukanganiswa kwekugadzirwa kwematombo egoridhe-mhangura pane nharaunda ukuwo zvichiwedzera kutorwa kwezviwanikwa.