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Izici ze-Fire Assay Method

2021/12/24

Ukuhlolwa komlilo akuyona nje indlela yasendulo yokucebisa igolide nesiliva, kodwa futhi kuyindlela ebalulekile yokuhlaziya igolide nesiliva. I-geology, izimayini, izincibilikisi zegolide nezesiliva ekhaya naphesheya ziyisebenzisa njengendlela yokuhlaziya enokwethenjelwa futhi esetshenziswa kabanzi ekukhiqizeni. Amanye amazwe asethe le ndlela njengendlela evamile. Izwe lethu futhi likubeke njengendlela kazwelonke ejwayelekile yokunqunywa kwegolide ekugxilweni kwegolide, ukugxiliswa kwekhopha, ubucwebe begolide kanye negolide eliyingxubevange. Ngokuthuthuka kwesayensi nobuchwepheshe, ayanda amasu amasha okuhlaziya igolide nesiliva, futhi amathuluzi okuhlaziya aya ngokuya ethuthuka. Uma kuqhathaniswa nezinye izindlela, indlela yokuhlola umlilo inenqubo ende yokusebenza futhi idinga amakhono athile. Baningi abahlaziyi abazama ukusebenzisa ezinye izindlela zokuhlaziya esikhundleni sokuhlola umlilo.

 

Nokho, indlela yokuhlola umlilo ayinakushintshwa. Ukuze kutholwe okuqukethwe kwegolide ezintweni ezingavuthiwe zegolide elinenani eliphezulu noma igolide elimsulwa, ukunemba nokunemba kwalo kungaphansi kwezinye izindlela zokunquma eziqondile. Ekuhlaziyweni kokulamula kokuqukethwe kwegolide nesiliva, ukuhlaziywa kokuhlolwa komlilo kunganikeza imiphumela egculisayo kubo bonke abathintekayo engxabanweni. Lokhu kungenxa yokuthi ukuhlolwa komlilo kunezinzuzo eziningi ezihlukile ezinye izindlela zokuhlaziya ezingenazo:

 

(1) Ukumelela amasampula okuhle. Igolide nesiliva kuvame ukuba khona ngokungalingani kusampula nge-oda lika<g/t. Ukuhlolwa komlilo kunosayizi omkhulu wesampula, ngokuvamile u-20-40g, futhi ngisho namasampula afika ku-100g noma ngaphezulu angathathwa. Ngakho-ke, ummeleli wesampula muhle. Iphutha lesampula lehliselwe kokuncane.

 

(2) Ukuvumelana nezimo okubanzi. Ingakwazi ukuzivumelanisa cishe nawo wonke amasampula, kusukela ku-ore, ukugxila kwegolide kuya ku-alloy gold, indlela yokuhlola umlilo ingakwazi ukunquma ngokunembile igolide nesiliva, kuhlanganise nalawo ma-antimonite angenakuxazululwa ngokuhlaziywa okumanzi. Ukuze kuhlaziywe izingxenye eziyinhloko zegolide elimsulwa, ukuhlolwa komlilo nakho kungathola imiphumela eyanelisayo. Ngaphandle kwamasampula ambalwa kakhulu, le ndlela ingashintshwa cishe kuwo wonke amaminerali.

 

(3) Ukusebenza kahle kokucebisa kuphezulu, kufinyelela izikhathi ezingaphezu kwezinkulungwane eziyishumi. Inani elincane legolide nesiliva linganothiswa ngokomthamo lisuka emashumini amagremu amasampuli aqukethe inani elikhulu lama-elementi e-matrix kunkinobho yegolide yokuhlola. Ngisho noma ama-micrograms egolide nesiliva acebile, ukulahlekelwa Kuncane kakhulu, - ngokuvamile amaphesenti ambalwa kuphela. Ngenxa yokwakheka okulula kwe-granule ehlanganisiwe (noma i-slag yokucebisa), kuyazuzisa ukusebenzisa izindlela zokuhlola ezahlukahlukene ukucacisa ngokuzayo.

 

(4) Imiphumela yokuhlaziya ithembekile futhi inembile. I-South African Rand Company ihlaziya igolide elimsulwa (>99.9%), 74 imiphumela yokuhlaziya yesampula efanayo, ukuchezuka okujwayelekile (S) 0.0058%. Imiphumela yokuhlaziywa kwe-S ye-10 yemikhiqizo yasekhaya efanayo nayo icishe ibe ngu-0.005%. Phakathi neminyaka edlule, ezinye izazi ekhaya nakwamanye amazwe ziye zazama ukushintsha ngokuphelele ukuhlolwa komlilo ngokuhlaziywa kwamakhemikhali okumanzi okusha noma ukuhlaziywa kwezinsimbi, kodwa azizange ziphumelele kuze kube manje. Werbicki et al. waqhathanisa izindlela ezintathu zokuhlaziya ze-Au kusixazululo-AAS, ICP-AES, kanye nendlela yokuhlola, futhi yanikeza ukuchezuka okujwayelekile kuka-S kwendlela ngayinye ehlaziywa amalabhorethri angu-18. Umphumela uba ukuthi izindlela ze-ICP-AES kanye ne-AAS ziyisisekelo Ezivumelanayo, kodwa zonke zimbi kakhulu kunendlela yegolide yesilingo I-Wall yabonisa ukuthi indlela yokuhlola umlilo ifanele amasampula anokuqukethwe kwegolide<1μg~1g, nokunemba kwayo nokunemba kungcono kunokunye ukuhlaziya kwezinsimbi.


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