I-Lead oxide iphucula ukuLeaching kweGolide kwi-Cyanide Tailings

intshayelelo

I-cyanidation yinkqubo esetyenziswa kakhulu ekukhupheni igolide kwi-ore. Nangona kunjalo, i-cyanide tailings idla ngokuba negolide eseleyo ethile, ekunzima ukuyibuyisela ngenxa yempembelelo yeeminerali ezinxulumene nayo. Ukuphucula ukusebenza kakuhle kwe-leaching yegolide kwi- cyanide tailings kubaluleke kakhulu ekusetyenzisweni kwakhona kwezixhobo kunye neenzuzo zoqoqosho. Kuphando lwakutshanje, kufunyenwe ukuba i-lead oxide inokudlala indima entle ekuphuculeni i-leaching yegolide kwi-cyanide tailings.

Ingxaki yexabiso eliphantsi leGolide yokuLeaching kwiCyanide Tailings

Umceli mngeni ophambili ekufumaneni igolide kwiintsalela ze-cyanide ukwimo entsonkothileyo yeminerali. Intsalela ye-cyanide kwiintsalela inokubangela ukuba igolide isabelane ne-sulfides yesinyithi esihambelanayo (njenge-pyrrhotite). Le mpendulo yenza ifilimu ye-Au/Sx passivation kumphezulu weengqayi zegolide. Le filimu ye-passivation isebenza njengomqobo, ithintela unxibelelwano olusebenzayo phakathi kwegolide nesisombululo se-cyanide, ngaloo ndlela ibangela izinga eliphantsi lokutsalwa kwegolide.

Njani iLothe oxide iphucula iGold Leaching

I-Chemical Reaction Mechanism

I-Lead oxide ithatha inxaxheba kwiindlela ezininzi zeekhemikhali ngexesha lenkqubo yokukhupha. Okokuqala, ioksidi yelothe inokusabela ngefilim yokudlula eyenziwe kumphezulu wegolide. Le mpendulo iphula ifilimu ye-passivation, iyiguqule ibe ziityuwa ezinyibilikayo. Ngenxa yoko, indawo yegolide iphinda ibonakale, ivumela i-cyanide ukuba iphendule ngegolide. Okwesibini, i-lead oxide inokusebenza njenge-oxidant kwinkqubo ye-leaching. Xa kukho i-lead oxide, amandla e-oxidation yenkqubo ayahlengahlengiswa, nto leyo iluncedo kwi-oxidation yegolide ukwenza i-soluble gold cyanide complexes.

I-Electrochemical Mechanism

Kukho umahluko onokubakho wombane phakathi kwegolide kunye nemveliso yokunciphisa i-lead oxide. Lo mahluko onokwenzeka wenza ukuba ukubunjwa kwebhetri yokuqala ngaphakathi kwenkqubo yokukhupha. Kule bhetri iphambili, igolide isebenza njenge-anode kwaye ingena kwi-oxidation, ngelixa imveliso yokunciphisa i-lead oxide isebenza njenge-cathode. Le nkqubo ye-electrochemical, eyaziwa ngokuba yi-corrosion, ikhawuleza ngokukhawuleza ukuchithwa kwegolide, ngaloo ndlela iphucula izinga lokutsalwa kwegolide.

uQinisekiso loMfuniselo

Izinto zoMfuniselo kunye neendlela

Abaphandi bakhethe iisampulu ezimele i-cyanide tailings ukwenzela imifuniselo. Iisampulu zeentsalela zezimbiwa zaye zaphawulwa okokuqala ukumisela ukwakheka kwezimbiwa kunye nomxholo wegolide. Emva koko, izixa ezahlukeneyo ze-load oxide zongezwa kwinkqubo ye-cyanide leaching. Iimeko zokuvuza, ezifana nexesha lokuvuza, ubushushu, kunye nokuxinana kwe-cyanide, zalawulwa ngononophelo. Uluhlu lweemvavanyo ezihambelanayo lwenziwa ukuqinisekisa ukuchaneka kweziphumo. Ukongeza, iindlela zokuhlalutya eziphucukileyo, ezinje ngokuskena i-electron microscopy (SEM) kunye neX-ray photoelectron spectroscopy (XPS), zisetyenziselwe ukuhlalutya i-morphology yomphezulu kunye notshintsho lokwakheka kweekhemikhali zamasuntswana egolide ngaphambi nasemva kokuphuma.

Iziphumo zovavanyo

Iziphumo zovavanyo zibonise ukuba ukongezwa kwe-lead oxide kukonyuse kakhulu ukusebenza kakuhle kwegolide ekutsaleni i-cyanide. Xa kuthelekiswa neqela lolawulo ngaphandle kokongezwa kwe-lead oxide, izinga lokutsalwa kwegolide lenyuke ngepesenti emangalisayo. Umzekelo, kwezinye iimvavanyo, izinga lokutsalwa kwegolide lenyuke ukusuka kwixabiso eliphantsi ukuya ngaphezulu kwe-[X]%. Kwangaxeshanye, ukusetyenziswa kweSodium Cyanide nako kwehlisiwe ukuya kwinqanaba elithile. Uhlalutyo lwe-SEM kunye ne-XPS luqinisekisile ngakumbi ukuba i-lead oxide ngokwenene yasabela kwifilimu yokuthambisa kumphezulu wegolide, kwaye izinto ezintsha zeekhemikhali zavela kumphezulu wamasuntswana egolide emva kokongezwa kwe-lead oxide, nto leyo eyayihambelana nendlela yokusabela ecetywayo.

Ithemba lesicelo

Ukufunyaniswa kokusetyenziswa kwe-oxide yelothe ukunyusa ukuvuzwa kwegolide kwiintsila zecyanide kunemibono ebanzi yokusetyenziswa. Kwishishini lezimayini, obu buchwepheshe bunokusetyenziswa kwizityalo zonyango ezikhoyo ze-cyanide tailings. Ngokungongeza nje i-oxide ye-lead kwinkqubo yokuvuza, izinga lokubuyisela igolide linokuphuculwa ngaphandle kokuphuculwa kwezixhobo ezinkulu. Oku akugcini nje ukwandisa ixabiso loqoqosho lwemithombo ye-tailings kodwa kunciphisa impembelelo yokusingqongileyo ebangelwa ukugcinwa kwexesha elide leentsalela eziqulethe igolide. Ngaphezu koko, le ndlela inokwandiswa kunyango lwezinye iintsimbi zegolide eziphikisayo, zibonelela ngesisombululo esitsha sokutsalwa ngokufanelekileyo kwemithombo yegolide.

Ukuqukumbela, i-lead oxide ibonisa amandla amakhulu ekwandiseni ukutsalwa kwegolide kwiintsila zecyanide. Ngokuqondwa nzulu kwendlela yokuphucula kunye nokwandisa okuqhubekayo kweemeko zovavanyo, obu bugcisa bulindeleke ukuba budlale indima ebalulekileyo kuphuhliso lwexesha elizayo loshishino lwemigodi yegolide.