Cyanide Sodium Heap Leaching Project of Oxidized Gold Ore ee Senegal

Macdanta dahabka ee Senegal waa meel hoose macdanta dahabka oksaydhaysan oo leh darajo dahab ah 2.49 g/t. Cilmi-baarista shaybaadhka ayaa la sameeyay iyadoo la adeegsanayo habka daadinta tuulan. Saamaynta cabbirrada habka sida cabbirka walxaha macdanta, noocyada iyo qiyaasta wakiilada leaching, wakhtiga leaching, iyo noocyada iyo qiyaasaha oksidants caawiye ee soo saarista dahabka ayaa la baaray. Xaaladaha ugu wanagsan ayaa la go'aamiyay, iyadoo la gaaray heerka leaching dahabka ah 89.57% iyo darajada dahabka ee haraaga leaching 0.26%. Natiijooyinkani waxay bixiyaan saldhig farsamo oo lagu kalsoonaan karo oo loogu talagalay horumarinta iyo ka faa'iidaysiga macdantan.

1. Guryaha Macdanta

Heerka dahabka ah ee macdanta ceyriinka ah waa 2.49 g/t, taas oo ah walxaha ugu muhiimsan ee dib loo soo celin karo. Heerka qalinku waa 4.26 g/t, oo leh wax yar. Qaybta ugu muhiimsan ee wasakhda ah ee macdanta waa SiO₂, oo ay ku xigto qadar yar oo Al iyo Fe ah. Qaybta ugu weyn ee waxyeelada leh waa arsenic, oo leh darajada arsenic ee 0.68%. Darajooyinka walxaha kale waa kuwo aad u hooseeya. Macdanta macdanaha ah ee ugu muhiimsan macdanta waa limonite, iyo macdanta sulfide waa mid aad u yar, inta badan pyrite. Macdanta gangue waxay u badan tahay quartz, feldspar, iyo macdanta dhoobada.

Macdanta dahabka ahi waa macdan oksaydhized ah oo aad u cimilaysan oo leh qaab dhismeed dabacsan, oo u badan qaab jajab iyo carro. Aqoonsiga batroolka ayaa muujinaya in inta badan pyrite ku jira macdanta ay u jiraan qaabka miraha euhedral, oo ku dhex jira quartz, feldspar, iyo chlorite. Cabbirka walxaha waa mid aad u fiican, guud ahaan wuxuu u dhexeeyaa 0.02 ilaa 0.4 mm. Limonite waxay u muuqataa sida pseudomorph of pyrite ama kolloidal limonite oo ay sameeyeen uumi ferric hydroxide oo lagu qaso qadar yar oo ah macdanta dhoobada silicate, buuxinta dildilaaca macdanta gangue. Quartz inta badan waxay u jirtaa sida metacolloidal chalcedony quartz, iyada oo inta badan cabbirada walxaha u dhexeeya 0.02 ilaa 0.15 mm. Feldspar waxa uu u qaabaysan yahay miro aan caadi ahayn ama wadar ahaan, oo leh cabbirka qayb ka mid ah 0.02 ilaa 0.3 mm. Macdanta dahabka ah ee macdantan ku jirta waxay leeyihiin xajmi yar oo aad u fiican, oo ka tirsan dahab-xariif ah -0.001 mm.

2. Hababka Imtixaanka

Macdanta ceeriin ee la jajabiyey cabbir gaar ah ayaa lagu shubay foosto cylindrical ah oo ay ka buuxaan sariir. Saamiga dareeraha-adag ayaa lagu hagaajiyay 1.5:1. Lime ayaa lagu daray si loo hagaajiyo qiimaha pH si ay uga weynaato 11. iyo qadar go'an oo ah Sodium cyanide ayaa lagu daray. Leaching waxaa lagu fuliyay heerkulka qolka muddo cayiman. Baaritaanka ka dib, saxarka ayaa lagu shubay si loo kala saaro dareeraha adag. Waxyaabaha dahabka ah ee ku jira hadhaaga leaching iyo kaydka dahabka ee xalka dahabku ku jiro ayaa la falanqeeyay, waxaana la xisaabiyay heerka leaching dahabka.

3. Natiijooyinka Imtixaanka iyo Falanqaynta

Iyada oo lagu saleynayo sifooyinka alaabta ceeriin ee ceyriinka ah, isbarbardhigga ayaa la sameeyay laba qorshe oo tijaabo ah: dhoobo-dhan cyanidation leaching iyo daadinta. Shuruudaha tijaabada ee cyanidation dhan-dhoobo waxay ahaayeen sida soo socota: shiididda ganaaxa -0.074 mm 95%, saamiga dareeraha-adag ee 3: 1. walaaqida farsamada, iyo wakhtiga leaching ee 24 saacadood. Shuruudaha tijaabada ee tuubada tuubada waxay ahaayeen sida soo socota: cabbirka walxaha macdanta -10 mm, saamiga dareeraha-adag ee 1.5: 1. iyo waqtiga fasaxa oo ah 72 saacadood.

Iyada oo la adeegsanayo habka dheecaanka tuulan, heerka leaching dahabku wuxuu ahaa 70.89%. Iyada oo la adeegsanayo habka wax-soo-saarka dhoobada oo dhan, heerka leaching dahabka ayaa waxoogaa la kordhiyey ilaa 74.05%. Iyadoo la tixgelinayo qiimaha wax-soo-saarka guud ahaan, habka daadinta qashinka waxaa lagu ansixiyay tijaabada si loo soo celiyo dahabka.

4. Gabagabo

(1) Macdanta dahabka ah waa macdan oksaydhized ah oo lagu sameeyay cimilada, oo leh darajo dahab ah 2.49 g/t, oo u badan dahab-gafan oo -0.001 mm. Macdantu waxay ku habboon tahay daawaynta habka leaching cyanidation.

(2) Iyada oo loo marayo tijaabooyinka xaalad-caleemo-tobineed, cabbirada habka ugu habboon ee geeddi-socodka daadinta ayaa loo go'aamiyay sida soo socota: cabbirka walxaha macdanta -20 mm, Sodium cyanide qiyaasta 2.0 kg/t, qiyaasta calcium peroxide ee 4.0 kg/t, iyo wakhtiga leaching ee 10 maalmood. Tusayaasha kala-soocidda la gaarey waxay ahaayeen heerka leaching dahabka ah ee 89.57% iyo darajada dahabka ee hadhaaga leaching ee 0.26%.

Ugu dambayntii, macmiilku wuu aqoonsaday natiijadayada imtixaannada. Ka dib markii lala xiriiro macaamilka, muunado ayaa la diray, waxaana la sameeyay imtixaanno taxane ah oo ka faa'iidaysi ah. Falanqaynta isbarbardhigga, socodka geedi socodka ku habboon xaaladda dhabta ah ayaa ugu dambayntii loo habeeyey mashruucan daadinta tuulan.

Hadda, mashruucu si xoog leh ayuu u socdaa. Dhawr bilood gudaheed, waxaa la dhammayn doonaa warshad taallooyin ah.

Mashruucii tuullaynta dahabka oksaydhka ee Senegal ayaa door wanaagsan ka ciyaartay horumarinta macdanta dahabka ee Senegal. Geedi socodka oo dhan ee mashruucan, laga bilaabo cilmi baarista ka faa'iidaysiga imtixaanka, naqshadaynta deyrka, imaanshaha qalabka, rakibidda iyo hawlgelinta, tababarka shaqaalaha, hawlgelinta warshad taallo, waa mas'uuliyadda United Chemical Warshadaha oo ay gaadheen heerar wax soo saar.

Si aad u hesho talooyin xirfadeed oo dheeraad ah? Nala soo xidhiidh!