Kedu uru pH kacha mma maka Cyanide leaching?

Cyanide leaching abụrụla isi nkuku na mwepụta ọla edo na ọla ọcha sitere na mineral kemgbe mmejuputa ụlọ ọrụ mmepụta ihe na 1887. Usoro a dabere na nguzozi siri ike nke kemịkalụ dị iche iche na gburugburu ebe obibi, yana uru pH nke ngwọta pụtara dị ka oke dị oke mkpa.

Usoro kemịkalụ dị n'azụ pH na Cyanide Leaching

Cyanide, na-adịkarị n'ụdị sodium cyanide (NaCN) ma ọ bụ potassium cyanide (KCN), na-eje ozi dị ka onye na-ahụ maka leaching mbụ. Agbanyeghị, mmekọrịta ya na ọla edo na ọlaọcha na-emetụta ọkwa pH nke ukwuu. Cyanide dị na nha nha ya na hydrogen cyanide (HCN), ihe na-egbu egbu ma na-agbanwe agbanwe. Na gburugburu acidic (pH dị ala), nguzozi kemịkalụ na-atụgharị gaa na nhazi nke gas HCN. Ọ bụghị nanị na nke a na-ebute nnukwu ihe ize ndụ nchekwa kamakwa ọ na-ebelata ohere nke ion cyanide n'efu, nke dị mkpa maka ịgbaze ọla edo na ọlaọcha.

Maka ọla edo dị mma na Mwepụta ọlaọcha, a ga-edobe ihe ngwọta na ala alkaline. Mgbe pH dị elu, cyanide na-anọkarị n'ụdị ionic ya, na-enye ya ohere iji ọla edo na ọlaọcha mepụta ogige kwụsiri ike. N'oge usoro leaching, a na-emepụta ion hydroxide, na-enye aka na alkalinity nke ngwọta.

Na-ekpebi oke pH kacha mma

Ọtụtụ ọmụmụ na omume ụlọ ọrụ achọpụtala pH kacha mma maka Cyanide leaching. N'ozuzu, a na-ewere pH uru karịa 10.5 dị mkpa, na ọtụtụ ọrụ na-achọ idobe pH n'etiti 11 na 12. Nke a bụ ihe kpatara ya:

• Na-ebuli mgbasa ọla edo: N'otu pH n'ime oke a, a na-emeziwanye ọnụego mgbasa ọla edo. Ịhapụ site na nso nso a nwere ike ibute mbelata dị ukwuu na nrụpụta mmịpụta. Dịka ọmụmaatụ, ọ bụrụ na pH dara n'okpuru 10.5. nhazi nke gas HCN na-ebelata ntinye nke ion cyanide n'efu, na-ebelata mmeghachi omume na ọla edo.

• Na-ebelata oriri Cyanide: Cyanide oriri nwere njikọ chiri anya na ọkwa pH. Ụkpụrụ pH dị ala nwere ike ime ka ojiji cyanide na-abawanye ka cyanide na-aghọ nke na-adịghị mma n'ịkpụ ụlọ. Site n'ịkwado pH dị elu, a na-ahụ nkwụsi ike nke ụlọ cyanide, na-ebelata ihe na-adịghị mkpa oriri Cyanide.

• Ntụle Nchekwa: Site na nchekwa nchekwa, idobe pH n'elu 10.5 dị oke mkpa. Gas HCN na-egbu egbu nke ukwuu, na ọbụlagodi obere ego nwere ike igbu mmadụ. Site n'ịchịkwa pH n'ime oke akwadoro, a na-ebelata mmepụta nke gas a dị ize ndụ, na-echekwa ahụike na nchekwa nke ndị ọrụ na-egwupụta akụ na ụlọ ọrụ mmepụta ihe.

Ihe ndị na-emetụta pH kacha mma

• Ihe mejupụtara ore: Ores dị iche iche nwere ike ịnwe adịghị ọcha na mineral dị iche iche nwere ike imetụta pH kacha mma. Dịka ọmụmaatụ, ọla ndị nwere sọlfọ dị elu nwere ike ịchọ mgbanwe pH dịtụ iche, dịka sọlfọ - nwere ogige nwere ike imeghachi omume na ngwọta cyanide ma na-emetụta gburugburu kemịkalụ n'ozuzu ya.

• okpomọkụ: Ọnọdụ okpomọkụ nke usoro leaching nwekwara ike imetụta pH kacha mma. Ka okpomọkụ na-agbanwe, a na-agbanwe solubility nke oxygen na ọnụego mmeghachi omume kemịkal. N'ozuzu, ka okpomọkụ na-abawanye, onwe-hydrolysis nke cyanide na-abawanye, na solubility nke oxygen na-ebelata. Nke a nwere ike ime ka a gbanwee ntakịrị na pH iji nọgide na-enwe ọnọdụ nkwụsịtụ kacha mma. Agbanyeghị, a na-eme ọtụtụ usoro leaching cyanide na ọnọdụ okpomọkụ (ihe dị ka 15 - 30 Celsius C) iji zere ire ere nke cyanide na oke ikuku oxygen.

Ụzọ maka njikwa pH

• Lime (CaO) na Caustic Soda (NaOH): Ndị a bụ reagents ndị a na-ejikarị emezi na idowe pH na leaching cyanide. lime, mgbe agbakwunyere na mmiri, na-emepụta calcium hydroxide, nke na-emeghachi omume na ihe acidic na ngwọta iji mee ka pH dịkwuo elu. Caustic soda (NaOH), ntọala siri ike, nwekwara ike iji bulie pH ngwa ngwa. Nhọrọ n'etiti abụọ ahụ dabere na ihe ndị dị ka ọnụ ahịa, nnweta, na ihe ndị a kapịrị ọnụ nke ígwè a na-edozi.

• Ihe mmetụta pH: Iji hụ na njikwa pH ziri ezi, ọrụ Ngwuputa ọgbara ọhụrụ na-adabere na sensọ pH dị elu. Ihe mmetụta ndị a nwere ike na-enyocha pH nke ngwọta leaching ma na-enye data ozugbo. Dabere na data a, ndị na-arụ ọrụ nwere ike ịhazigharị mgbakwunye pH - njikwa reagents iji nọgide na-enwe oke pH kacha mma.

N'ikpeazụ, uru pH kachasị mma maka cyanide leaching dị na nso nke 11 - 12. A na-ekpebi uru a site na ngwakọta nke mmeghachi omume kemịkalụ, ihe nchekwa chọrọ, na mkpa maka mmepụta ọla edo na ọlaọcha dị mma. Site na iji nlezianya na-achịkwa pH na paramita ndị ọzọ, ụlọ ọrụ ndị na-egwupụta akụ nwere ike ịbawanye mgbake nke ọla dị oké ọnụ ahịa ma na-ebelata ihe ize ndụ gburugburu ebe obibi na nchekwa.