Indima yeCalcium oxide kwiGold Extraction ngeSodium Cyanide

intshayelelo

I-Gold cyanidation, ekwaziwa ngokuba yi -cyanide leaching, yinkqubo esetyenziswa kakhulu ekukhupheni igolide kwi-ore eluhlaza. Kule nkqubo, i-Sodium cyanide isetyenziselwa ukunyibilikisa igolide ngaphakathi kwelitye, njengoko igolide ngokwayo inganyibiliki kwi-cyanide. Nangona kunjalo, ubukho bokungcola okwahlukeneyo kunye nemeko-bume yeekhemikhali ye-ore kunokuchaphazela kakhulu ukusebenza kakuhle kunye neendleko zenkqubo yokukhupha. Kulapho iCalcium oxide idlala khona indima ebalulekileyo.

Ukulungelelanisa i-pH yexabiso lePulp

Omnye wemisebenzi ephambili ye-calcium oxide kwi-cyanidation yegolide kukulawula i-pH ye-ore pulp. Xa i-calcium oxide yongezwa emanzini, isabela ekunyuseni ukuxinwa kwee-ion ze-hydroxide kwisisombululo, ngaloo ndlela iphakamisa ixabiso le-pH.

Kwinkqubo ye-cyanidation, kubalulekile ukugcina inqanaba le-pH ephezulu, ngesiqhelo lingaphezulu kwe-11. Oku kungenxa yokuba iSodium Cyanide iyanyibilika kwisisombululo samanzi. Ubungakanani bale hydrolysis buhambelana nexabiso le-pH yesisombululo. Kwi-pH ephezulu, ukulingana kwempendulo ye-hydrolysis kuyatshintsha ukuze kuncitshiswe uxinzelelo lwe-hydrogen cyanide kwisisombululo. Ekubeni i-hydrogen cyanide iguquguqukayo kwaye inokuphuma kwinkqubo, ukugcina i-pH ephezulu kunceda ukuthintela ukulahleka kwe-cyanide ngohlobo lwegesi ye-hydrogen cyanide. Oku kubalulekile njengoko icandelo eliphambili leaching yegolide yi-cyanide ion, kwaye naluphi na ukulahleka kwe-cyanide kuya kukhokelela ekusetyenzisweni okwandisiweyo kwe- sodium cyanide kunye nokusebenza okuncitshisiweyo kokukhupha iGolide.

Ukuthintela iHydrolysis yeCyanide

Njengoko kukhankanyiwe ngasentla, i-hydrolysis ye-sodium cyanide inokubangela ukubunjwa kwe-hydrogen cyanide, engeyiyo kuphela ilahleko ye-reagent ye-cyanide exabisekileyo kodwa ibeka ingozi yokusingqongileyo kunye nokhuseleko ngenxa yetyhefu yayo. I-calcium oxide inceda ukunqanda le mpendulo ye-hydrolysis. Ngokwandisa i-pH yesisombululo, kunciphisa ukuxinwa kwee-ion ze-hydrogen ezifumanekayo zokusabela kunye ne-cyanide ions ukwenza i-hydrogen cyanide. Oku kuqinisekisa ukuba inxalenye ephezulu ye-cyanide ihlala ikwimo ye-cyanide ion, eyimfuneko ekutshitshisweni kwegolide.

Ukuphelisa imiphumo emibi yezinye ii-ion

I-Ore ihlala iqulethe ukungcola okwahlukeneyo okufana nobhedu kunye ne-iron ion, enokuthi ibe nefuthe elibi kwinkqubo yegolide ye-cyanidation. Umzekelo, iiyoni zobhedu zinokusabela ngecyanide zenze iikhompawundi ezintsonkothileyo, ngaloo ndlela zitye icyanide kwaye zinciphise ukufumaneka kwayo ekunyibilikeni kwegolide. Ii-iron, ngakumbi ii-ion ze-ferric, zinokusebenzisana ne-cyanide, zenze ii-ferricyanide complexes.

I-calcium oxide inokunceda ukunciphisa ezi ziphumo. Kwimeko-bume yealkaline eyenziwe yi-calcium oxide, ezinye zezi ion zetsimbi zinokwenza i-precipitates. Ngokomzekelo, ii-ion ze-ferric zinokusabela kunye ne-hydroxide ions ukwenza i-ferric hydroxide precipitate. Le mvula inciphisa ukuxinwa kwee-iron kwisisombululo, ithintele ukuba ingadli i-cyanide kunye nokuphazamisa inkqubo yokucoca igolide.

Iimpembelelo ezimbi ezinokuthi zibe kho kwi-pH ePhezulu

Nangona i-calcium oxide inenzuzo kwiinkalo ezininzi zenkqubo ye-cyanidation, ukuba ixabiso le-pH liphezulu kakhulu (ngokuqhelekileyo ngaphezu kwe-12), linokuba nefuthe elibi kwi-extraction yegolide. Kumanqanaba e-pH aphezulu kakhulu, i-calcium oxide inokubangela ukubunjwa kwe-calcium peroxide kumphezulu wamasuntswana egolide. Olu luhlu lusebenza njengesithintelo, luthintela ukudibana ngokuthe ngqo phakathi kweeyoni ze-cyanide kunye nomphezulu wegolide, ngaloo ndlela kuthintela ukuchithwa kwegolide. Ke ngoko, kubalulekile ukulawula ngononophelo ubungakanani be-calcium oxide eyongeziweyo ukuqinisekisa ukuba i-pH igcinwa ikwinqanaba elifanelekileyo lokutsalwa kwegolide ngokufanelekileyo.

isiphelo

Isishwankathelo, i-calcium oxide idlala iindima ezibalulekileyo ezininzi kwinkqubo yokukhutshwa kwegolide usebenzisa i-sodium cyanide. Ilungisa i-pH ye-pulp ye-ore, inqanda i-hydrolysis ye-cyanide, kwaye inceda ukuphelisa iziphumo ezibi zezinye ioni zetsimbi. Nangona kunjalo, ulawulo olululo lwe-pH lubalulekile ukunqanda iimpembelelo ezinokuthi zibe kho ekutsalweni kwegolide. Ukuqonda le misebenzi ye-calcium oxide kunokunceda ukwandisa inkqubo ye-cyanidation, ukuphucula ukusebenza kakuhle kokutsalwa kwegolide, kunye nokunciphisa ukusetyenziswa kwe-sodium cyanide, engeyiyo inzuzo kuphela kwezoqoqosho kodwa kunye nokusingqongileyo ngokunciphisa ukukhutshwa kweekhompawundi ezinetyhefu ze-cyanide.