I-sodium cyanide Leaching of Gold from Low - Grade Gold - Bearing Tailings

Emkhakheni wokumbiwa kwegolide nokukhishwa kwalo, ukubuyiswa kwegolide ngempumelelo kusuka ezinsimbini eziyigugu nezingcolile ezisezingeni eliphansi kuye kwaba yisihloko socwaningo esibaluleke kakhulu. Njengoba amadiphozithi egolide asezingeni eliphezulu encipha kancane kancane, ukusetshenziswa kwezinsizakusebenza ezingenalutho kuye kwadonsela ukunaka okwengeziwe. Lesi sihloko sigxile enqubweni yokukhipha igolide nge -Cyanide kusuka ezinsimbini ezingenalutho ezigcwele igolide ezisezingeni eliphansi, okuhloswe ngayo ukunikeza ukuqonda okubalulekile kule ndawo.

1. Isingeniso

Izinsalela ezinegolide ezisezingeni eliphansi, okuyizinsalela emva kokucubungula okuyisisekelo kwezinsimbi zegolide, zisaqukethe inani elithile legolide. Ngenxa yokwakheka kwazo okuyinkimbinkimbi kwe-mineralogical kanye namabanga aphansi egolide, ukukhishwa kwegolide kule misila kuyinselele. Kodwa-ke, ngokuthuthukiswa okuqhubekayo kobuchwepheshe bokukhipha, kungenzeka ukubuyisela ngokwezomnotho igolide kubo. I-Cyanide leaching sekuyisikhathi eside iyindlela esetshenziswa kakhulu embonini yezimayini zegolide ngokusebenza kahle kwayo okuphezulu kanye nokukhetha ekukhishweni kwegolide.

2. Izindlela Zokuhlola

2.1 Ukulungiselela Isampula

Izinsalela zemayini yegolide ezisetshenziswe kulolu vivinyo zaqala ukufakwa enkambisweni yokuhlanganisa i-granulation. Ukuhlanganisa i-granulation kuyisinyathelo esibalulekile sokwelashwa kwangaphambi kwesikhathi njengoba kungathuthukisa ukuxhumana phakathi kwezinhlayiya ze-tailings kanye ne-leaching agent, ngaleyo ndlela kuthuthukiswe ukusebenza kahle kokuhlanganisa i-leaching. Ngemva kokuhlanganisa i-granulation, izinsalela zase zilungele ukuhlolwa kokuhlanganisa i-Cyanide okulandelayo.

2.2 Ukwelashwa Ngaphambili

Imisele yemigodi yegolide yaphathwa kusengaphambili ngesisombululo se-alkaline amahora angu-8. Lesi sinyathelo sangaphambi kokwelashwa sibalulekile njengoba singasiza ekuhlukaniseni amanye amaminerali asemiseleni, okwenza igolide litholakale kalula yi- ejenti yokukhipha i-cyanide . Siphinde silungise indawo ye-pH yemisele, okuzuzisa ukusabela okulandelayo kokukhipha i-cyanide.

2.3 I-Cyanide Leaching

Ukususwa kwe-Cyanide kwenziwa kusetshenziswa i-Sodium cyanide njenge-leaching agent. Inani le- Sodium Cyanide elisetshenzisiwe lalingu-1 kg/t. Isikhathi sokususwa sabekwa emahoreni angama-24, futhi ngesikhathi senqubo yokususwa kwe-leaching, i-pH yesisombululo yagcinwa ngaphakathi kwebanga eliphakathi kuka-10.0 no-12.0. Inani le-pH elifanele liyadingeka ukuqinisekisa ukuzinza kwe-ion ye-cyanide kanye nokusebenza kahle kokusabela kokususwa kwe-leaching.

3. Imiphumela Yokuhlola

Imiphumela yokuhlola ikhombisile ukuthi ngaphansi kwezimo ezishiwo ngenhla, izinga lokukhipha igolide lingafinyelela ngaphezu kuka-60%. Lokhu kubonisa ukuthi inqubo ehlanganisiwe yokukhipha igolide ngaphambi kokusebenzisa i-alkaline kanye nokukhipha i-cyanide iyasebenza ekukhipheni igolide kule misele yemigodi yegolide ethile. Ukwelashwa kwe-alkaline kwamahora angu-8, isilinganiso esingu-1 kg/t se- sodium cyanide , isikhathi sokukhipha i-leaching samahora angu-24, kanye nobubanzi be-pH obungu-10.0 - 12.0 kunikeze isethi elungiselelwe kahle yamapharamitha ale nqubo yokukhipha i-leaching.

4. Ukubaluleka kanye ne-Outlook Yekusasa

Ukusetshenziswa ngempumelelo kwale ndlela yokucwilisa i-cyanide ezinsaleni ezinegolide zebanga eliphansi kunemithelela ebalulekile. Okokuqala, inikeza indlela engokoqobo yokugaywa kabusha kwegolide emisileni, ukunciphisa ukungcola nokwandisa ukusetshenziswa kwezinsiza. Okwesibili, ingakwazi ukuletha izinzuzo zezomnotho ezinkampanini zezimayini ngokuthola igolide elibalulekile emisileni elahliwe ngaphambilini.

Ngokuzayo, ucwaningo olwengeziwe lungenziwa ukuze kuthuthukiswe le nqubo. Isibonelo, ukuhlola izinhlobo ezahlukene zokwelapha kusengaphambili ukuze kuthuthukiswe izinga lokukhululwa kwegolide, noma ukufunda ngokusetshenziswa kwamanye ama-ejenti okukhipha amanzi ukuze kwehliswe umthelela wemvelo we-cyanide. Ukwengeza, ukusetshenziswa kwalobu buchwepheshe ezinhlotsheni ezihlukene zezinsalela ezinegolide zezinga eliphansi - kudingeka kuphenywe ukuze kutholwe ukuthi zikhona zonke.

Sengiphetha, inqubo yokucwiliswa kwe-cyanide efundwa lapha inikeza isixazululo esithembisayo sokumbiwa kwegolide emisileni enegolide yezinga eliphansi, futhi ucwaningo oluqhubekayo nokwenza ngcono kule ndawo kuzoba neqhaza ekuthuthukisweni okusimeme kwemboni yezimayini zegolide.