I-Cyanide Sodium Heap Leaching Project yeNdawo Yegolide Ene-Oxidized e-Senegal

Imayini yegolide eSenegal isezingeni eliphansi insimbi yegolide ene-oxidized ngebanga legolide elingu-2.49 g/t. Ucwaningo lwelabhorethri lwenziwa kusetshenziswa i- inqubo ye-heap leaching. Imithelela yemingcele yenqubo efana nosayizi wezinhlayiyana ze-ore, izinhlobo nemithamo ye-ejenti yokucwilisa, isikhathi sokuvuza, nezinhlobo nemithamo yama-oxidants asizayo ekukhishweni kwegolide kuye kwaphenywa. Kwanqunywa izimo ezifanele, kwafinyelelwa izinga legolide lokucwiliswa kwegolide elingama-89.57% kanye nebanga legolide endaweni esele esele engu-0.26%. Le miphumela ihlinzeka ngesisekelo sobuchwepheshe esithembekile sokuthuthukiswa okunengqondo nokusetshenziswa kwale nsimbi.

1. Izakhiwo zensimbi

Ibanga legolide le-ore eluhlaza ngu-2.49 g/t, okuyisici esiyinhloko esingabuyiseleka. Ibanga elisiliva lingu-4.26 g/t, elinokuqukethwe okuphansi uma kuqhathaniswa. Ingxenye eyinhloko yokungcola ku-ore i-SiO₂, elandelwa amanani amancane e-Al ne-Fe. Ingxenye eyinhloko eyingozi i-arsenic, enezinga le-arsenic lika-0.68%. Amabanga ezinye izici aphansi ngokuqhathaniswa. Amaminerali ensimbi ayinhloko ku-ore yi-limonite, futhi amaminerali e-sulfide ayivelakancane kakhulu, ikakhulukazi i-pyrite. Amaminerali e-ganggue ikakhulukazi i-quartz, i-feldspar, namaminerali obumba.

Le mayini yegolide iyinsimbi ene-oxidized enamandla kakhulu enesakhiwo esixekethile, ikakhulukazi ngesimo sezinhlayiya eziphukile kanye nenhlabathi. Ukuhlonza i-Petrographic kubonisa ukuthi iningi le-pyrite ku-ore likhona ngesimo sezinhlamvu ze-euhedral, ezifakwe ku-quartz, i-feldspar, ne-chlorite. Ubukhulu bezinhlayiyana buhle kakhulu, ngokuvamile busukela ku-0.02 ukuya ku-0.4 mm. I-Limonite ibonakala njenge-pseudomorph ye-pyrite noma i-colloidal limonite eyakhiwe yi-condensation ye-ferric hydroxide solution ehlanganiswe nenani elincane lamaminerali obumba we-silicate, egcwalisa imifantu yamaminerali e-ganggue. I-Quartz ikakhulukazi ikhona njenge-metacolloidal chalcedony quartz, enobukhulu bezinhlayiyana eziningi ukusuka ku-0.02 kuya ku-0.15 mm. I-Feldspar isesimweni sokusanhlamvu okungajwayelekile noma ama-aggregate, enosayizi wezinhlayiyana ongu-0.02 kuya ku-0.3 mm. Amaminerali egolide akule nsimbi anosayizi wezinhlayiyana ocolekile, okwegolide elicolisekile elingu -0.001 mm.

2. Izindlela Zokuhlola

Insimbi eluhlaza echotshoziwe yaba usayizi othize yayithelwa emgqonyeni oyicylindrical ogcwele idwala. Isilinganiso se-liquid-solid sibekwe ku-1.5:1. I-Lime yengezwe ukuze kulungiswe inani le-pH libe likhulu kuno-11. kanye nenani elithile le I-sodium cyanide kwengezwe. I-Leaching yenziwa ekamelweni lokushisa isikhathi esithile. Ngemuva kokuhlolwa, i-pulp yathululelwa ukuze kuhlukaniswe uketshezi oluqinile. Okuqukethwe kwegolide ensaleleni yokucwiliswa kanye nenani legolide esixazululweni esinegolide kwahlaziywa, kwabalwa nezinga legolide lokucwiliswa kwegolide.

3. Imiphumela Yokuhlolwa Nokuhlaziya

Ngokusekelwe ezicini zezakhiwo ze-ore eluhlaza, ukuqhathanisa kwenziwa phakathi kwezinhlelo ezimbili zokuhlola: udaka oluphelele. ukukhishwa kwe-cyanidation nokugcwala kwenqwaba. Izimo zokuhlola ze-cyanidation yodaka lonke zazimi kanje: ukucoleka kokugaya okungu--0.074 mm 95%, isilinganiso soketshezi-okuqinile kuka-3:1. ukunyakaziswa komshini, nesikhathi sokuvuza samahora angama-24. Izimo zokuhlola zokuvuza kwenqwaba zazimi kanje: usayizi wezinhlayiyana ze-ore ongu--10 mm, isilinganiso se-liquid-solid esingu-1.5:1. kanye nesikhathi sokuvuza esingama-72 h.

Ngokusetshenziswa kwenqubo yokucwilisa inqwaba, izinga lokucwiliswa kwegolide lalingama-70.89%. Ngokusebenzisa inqubo yodaka lonke lwe-cyanidation, izinga lokucwiliswa kwegolide lenyuke kancane laya ku-74.05%. Uma kucatshangelwa izindleko zokukhiqiza ngokuphelele, inqubo yokukhishwa kwenqwaba yamukelwa esivivinyweni sokuthola igolide.

I-4. Iziphetho

(1) I-ore yegolide iyinsimbi eyenziwe nge-oxidized eyakhiwa isimo sezulu, enezinga legolide elingu-2.49 g/t, ikakhulukazi igolide elicolisekile elingu -0.001 mm. I-ore ilungele ukwelashwa ngenqubo ye-cyanidation leaching.

(2) Ngokuhlola isimo sokuvuza kwenqwaba, imingcele yenqubo yokuvuza kwenqwaba inqunywe ngale ndlela elandelayo: usayizi wezinhlayiyana zensimbi ezingama-20 mm, I-Sodium Cyanide Isilinganiso esingu-2.0 kg/t, isilinganiso se-calcium peroxide esingu-4.0 kg/t, nesikhathi sokuvuza izinsuku eziyi-10. Izinkomba zokuhlukanisa ezizuziwe kwakuyizinga legolide lokucwiliswa kwegolide elingama-89.57% kanye nebanga legolide endaweni esele esele engu-0.26%.

Ekugcineni, ikhasimende liyibonile imiphumela yethu yokuhlolwa. Ngemva kokuxhumana nekhasimende, amasampula athunyelwa, futhi uchungechunge lwezivivinyo zokuhlomula lwenziwa. Ngokuhlaziya okuqhathanisayo, ukugeleza kwenqubo efanele isimo sangempela ekugcineni kwenziwa ngendlela oyifisayo le phrojekthi yokufundisa inqwaba.

Njengamanje, iphrojekthi ithuthuka ngamandla. Ezinyangeni ezimbalwa, isitshalo sokuvuza inqwaba sizoqedwa.

Iphrojekthi yokucwilisa inqwaba yetshe legolide eline-oksijini e-Senegal ibambe iqhaza elihle ekuthuthukiseni ukuthuthukiswa kwezimayini zegolide e-Senegal. Yonke inqubo yale phrojekthi, kusukela ocwaningweni lokuhlolwa kokuhlomula, idizayini yegceke, ukufika kwemishini, ukufakwa kanye nokugunyazwa, ukuqeqeshwa kwabasebenzi, ukuya ekusebenzeni kwesikhungo sokuhlanza inqwaba, kuwumthwalo wemfanelo United Chemical Imboni futhi isifinyelele amazinga okukhiqiza.

Ukuze uthole iziphakamiso zochwepheshe ezengeziwe? Xhumana nathi!