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

Emkhakheni wezimayini nokumbiwa kwegolide, ukutholwa kwegolide ngendlela ephumelelayo kusuka ezinsimbini nasezinsikeni zezinga eliphansi sekuyisihloko socwaningo esibaluleke kakhulu. Njengoba idiphozithi yegolide yezinga eliphezulu iyancipha kancane kancane, ukuxhashazwa kwemithombo yezinga eliphansi sekudonse ukunakwa okwengeziwe. Lesi sihloko sigxile ku- I-Cyanide inqubo yokukhishwa kwegolide kusuka emisileni enegolide yezinga eliphansi, okuhloswe ngayo ukuhlinzeka ngemininingwane ebalulekile 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 kulokhu kuhlolwa zaqale zangaphansi kwenqubo yegranulation. I-granulation iyisinyathelo esibalulekile sokwelashwa kwangaphambili njengoba ingathuthukisa ukuxhumana phakathi kwezinhlayiya ze-tailings kanye ne-leaching agent, ngaleyo ndlela ithuthukise ukusebenza kahle kokugeleza. Ngemuva kwe-granulation, ama-tailings aselungele okulandelayo Ukukhishwa kwe-Cyanide ukuhlolwa.

2.2 Ukwelashwa Ngaphambili

Izinsalela zemayini yegolide zifakwe ngaphambili ngesisombululo se-alkaline amahora angu-8. Lesi sinyathelo sokwelapha sibalulekile ngoba singasiza ukudiliza amanye amaminerali asezinsikeni, okwenza igolide lifinyeleleke kalula i-cyanide i-ejenti yokuhlanza. Iphinde ilungise imvelo ye-pH yezinsalela, okuyinzuzo ekuphenduleni okulandelayo kwe-cyanide leaching.

2.3 I-Cyanide Leaching

I-Cyanide leaching yenziwa kusetshenziswa I-sodium cyanide njenge-ejenti yokuhlanza. Inani le I-Sodium Cyanide esetshenzisiwe yayingu-1 kg/t. Isikhathi se-leaching sibekwe emahoreni angama-24, futhi phakathi nenqubo yokukhishwa, i-pH yesisombululo igcinwe ngaphakathi kwebanga lika-10.0 - 12.0. Inani le-pH elifanele liyadingeka ukuze kuqinisekiswe ukuzinza kwe-ion ye-cyanide kanye nempumelelo yokusabela kwe-leaching.

3. Imiphumela Yokuhlola

Imiphumela yokuhlola ibonise ukuthi ngaphansi kwezimo ezishiwo ngenhla, izinga lokucwiliswa kwegolide lingafinyelela ngaphezu kwama-60%. Lokhu kukhombisa ukuthi inqubo ehlanganisiwe ye-alkaline pretreatment kanye ne-cyanide leaching iyasebenza ekukhipheni igolide kule nsalela ethile yemayini yegolide. Ukwelashwa kwe-alkaline kwamahora angu-8, 1 kg/t of i-sodium cyanide Isikali, amahora angama-24 - isikhathi sokuvuza, kanye nebanga le-pH lika-10.0 - 12.0 kunikeze isethi elungiselelwe yamapharamitha ale nqubo yokucwilisa.

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.