Karolo ea Calcium Oxide ho Nōkiloeng Khauta ka Sodium Cyanide

Selelekela

Khauta cyanidation, e tsejoang hape e le cyanide leaching, ke mokhoa o sebelisoang haholo bakeng sa ho ntša khauta ho tsoa liboleng tse tala. Ts'ebetsong ena, Sodium cyanide e sebelisoa ho qhaqha khauta ka har'a lejoe, kaha khauta ka boeona ha e qhibilihe ka har'a cyanide. Leha ho le joalo, boteng ba litšila tse fapa-fapaneng le tikoloho ea lik'hemik'hale tsa ore e ka ama haholo katleho le litšenyehelo tsa ts'ebetso ea ho ntša. Ke hona moo Calcium oxide e bapala karolo ea bohlokoa.

Ho fetola boleng ba pH ba Pulp

E 'ngoe ea mesebetsi ea mantlha ea calcium oxide ho cyanidation ea khauta ke ho laola pH ea makhasi a ore. Ha khalsiamo oxide e eketsoa metsing, e arabela ho eketsa bongata ba li-ion tsa hydroxide tharollong, ka hona e phahamisa boleng ba pH.

Ts'ebetsong ea cyanidation, ho bohlokoa ho boloka pH e phahameng, hangata e ka holimo ho 11. Sena ke hobane Sodium cyanide hydrolyzes ka tharollo e nang le metsi. Tekanyo ea hydrolysis ena e amana le boleng ba pH ba tharollo. Ka pH e phahameng, tekano ea karabelo ea hydrolysis ea fetoha ho fokotsa bongata ba hydrogen cyanide tharollong. Kaha hydrogen cyanide ha e na matla 'me e ka baleha tsamaisong, ho boloka pH e phahameng ho thusa ho thibela tahlehelo ea cyanide ka mokhoa oa khase ea hydrogen cyanide. Sena se bohlokoa kaha karolo ea bohlokoa bakeng sa ho tsoa ha khauta ke ion ea cyanide, 'me tahlehelo efe kapa efe ea cyanide e ka lebisa tšebelisong e eketsehileng. sodium cyanide le ho fokotsa ts'ebetso ea Khauta e ntšoang.

Ho thibela Hydrolysis ea Cyanide

Joalokaha ho boletsoe ka holimo, hydrolysis ea sodium cyanide e ka fella ka ho thehoa ha hydrogen cyanide, e seng feela tahlehelo ea reagent ea bohlokoa ea cyanide empa hape e baka likotsi tsa tikoloho le polokeho ka lebaka la chefo ea eona. Calcium oxide e thusa ho thibela karabelo ena ea hydrolysis. Ka ho eketsa pH ea tharollo, e fokotsa bongata ba li-ion tsa hydrogen tse fumanehang bakeng sa karabelo le li-ion tsa cyanide ho theha hydrogen cyanide. Sena se tiisa hore karolo e phahameng ea cyanide e sala e le li-ion tsa cyanide, tse hlokahalang bakeng sa ho qhibiliha ha khauta.

Ho Felisa Litlamorao tse Mpe tsa Li-Ion tse ling

Hangata ore e na le litšila tse fapaneng tse kang li-ion tsa koporo le tsa tšepe, tse ka bang le phello e mpe ts'ebetsong ea khauta ea cyanidation. Ka mohlala, li-ion tsa koporo li ka sebetsana le cyanide ho etsa metsoako e rarahaneng, kahoo e ja cyanide le ho fokotsa ho fumaneha ha eona bakeng sa ho qhibiliha ha khauta. Li-ion tsa tšepe, haholo-holo li-ion tsa ferric, li ka boela tsa sebelisana le cyanide, tsa etsa li-complexes tsa ferricyanide.

Calcium oxide e ka thusa ho fokotsa litlamorao tsena. Sebakeng sa alkaline se entsoeng ke calcium oxide, tse ling tsa li-ion tsena tsa tšepe li ka etsa precipitates. Ka mohlala, li-ion tsa ferric li ka sebetsana le li-ion tsa hydroxide ho etsa ferric hydroxide precipitate. Pula ena e fokotsa bongata ba li-ion tsa tšepe ka har'a tharollo, e li thibela ho ja cyanide le ho kena-kenana le ts'ebetso ea ho tsoa ha khauta.

Liphello tse mpe tse ka bang teng ho High pH

Le hoja calcium oxide e le molemo likarolong tse ngata tsa ts'ebetso ea cyanidation, haeba pH ea boleng e phahame haholo (hangata e ka holimo ho 12), e ka ba le phello e mpe ho ntšoa ha khauta. Maemong a pH a phahameng haholo, calcium oxide e ka baka sebopeho sa lera la calcium peroxide holim'a likaroloana tsa khauta. Lera lena le sebetsa e le mokoallo, ho thibela ho kopana ka ho toba pakeng tsa li-ion tsa cyanide le bokaholimo ba khauta, ka hona ho sitisa ho qhibiliha ha khauta. Ka hona, ho bohlokoa ho laola ka hloko palo ea calcium oxide e kentsoeng ho netefatsa hore pH e bolokoa e le maemong a nepahetseng bakeng sa ho ntšoa ha khauta hantle.

fihlela qeto e

Ka kakaretso, calcium oxide e bapala likarolo tse ngata tsa bohlokoa ts'ebetsong ea ho ntša khauta ka sodium cyanide. E lokisa pH ea makhasi a ore, e thibela hydrolysis ea cyanide, 'me e thusa ho felisa litlamorao tse mpe tsa li-ion tse ling tsa tšepe. Leha ho le joalo, taolo e nepahetseng ea pH ea hlokahala ho qoba litlamorao tse mpe tse ka bang teng ho ntšoa ha khauta. Ho utloisisa mesebetsi ena ea calcium oxide ho ka thusa ho ntlafatsa ts'ebetso ea cyanidation, ho ntlafatsa ts'ebetso ea ho ntšoa ha khauta, le ho fokotsa ts'ebeliso ea sodium cyanide, e seng molemong oa moruo feela empa hape e baballang tikoloho ka ho fokotsa ho lokolloa ha metsoako e chefo ea cyanide.