Mmalite nke Sodium Cyanide Leaching na ọla edo-ọla kọpa

Okwu Mmalite

Mwepụta nke ọla edo na ọla kọpa sitere na ọla edo-ọla kọpa bụ usoro dị mgbagwoju anya. Cyanidation, karịsịa iji sodium cyanide, ogologo oge bụ usoro kachasị mkpa maka mmịpụta ọla edo. Otú ọ dị, ọnụnọ ọla kọpa na ọla ndị a na-ebute nnukwu nsogbu na usoro cyanidation, na-emetụta ma mgbake ọla edo na cyanide oriri. Bọọgụ blọgụ a na-abanye n'ime njikarịcha sodium Cyanide leaching na ọla-ọla kọpa, na-enyocha ụkpụrụ dị n'okpuru, ihe ịma aka, na ngwọta ọhụrụ.

Ụkpụrụ nke Cyanide Leaching

Cyanide leaching dabere na ikike pụrụ iche nke ion cyanide iji mepụta ogige kwụsiri ike nwere ọla edo na ọla ọcha. Sodium cyanide, nke na-agbaze nke ukwuu na mmiri ma kwụsie ike, na-eje ozi dị ka lixivant bụ isi. Mgbe agbazere na mmiri, ọ na-ahapụ ion cyanide. Ion ndị a na-emeghachi omume na ọla edo na ọnụnọ oxygen site na usoro electrochemical. A na-ebu ụzọ mee ka ọla edo bụrụ oxidized wee kee ya site na ion cyanide ka ọ bụrụ mgbagwoju anya soluble, na-enye ohere maka mmịpụta ya na ọla.

Ihe ịma aka ọla kọpa na-ebute na ọla-ọla kọpa

Mmụba oriri Cyanide

Ọla kọpa na ọla ọla kọpa na-emeghachi omume na cyanide iji mepụta ogige ọla kọpa-cyanide dị iche iche. Maka 1% ọ bụla nke ọla kọpa na-arụ ọrụ ugbu a, enwere ike iri ihe dị ka kilogram 30 / t nke NaCN. Nnukwu oriri a abụghị naanị na-ebuli ọnụ ahịa arụ ọrụ nke usoro cyanidation mana ọ na-achọkwa nlekọta nke ọma nke ojiji cyanide.

Mgbochi nke ịcha ọla edo

Ọnụnọ dị elu nke ogige ọla kọpa-cyanide na ngwọta leaching nwere ike belata mgbasa nke ọla edo. Ọzọkwa, ọla kọpa nwere mmasị na-etolite passivation n'ígwé n'elu nke ọla edo ahụ. N'ígwé ndị a na-arụ ọrụ dị ka ihe mgbochi, na-ebelata njikọ dị n'etiti ọla edo na ion cyanide ma si otú a na-egbochi usoro mmịpụta.

Atụmatụ maka ịkwalite Sodium Cyanide Leaching na ọla edo-ọla kọpa

Pretreatment nke Ores

• Ụzọ nkewa nke anụ ahụ: Usoro dị ka ike ndọda, flotation, ma ọ bụ magnetik nkewa nwere ike tinye tupu-etinye uche na ore. Site n'ịhọrọ iwepụ akụkụ dị mkpa nke mineral ọla kọpa tupu cyanidation, ụzọ ndị a na-ebelata ọdịnaya ọla kọpa dị n'ihe a ga-agbapụta. Dịka ọmụmaatụ, flotation nwere ike ikewapụ mineral sulfide ọla kọpa na ọla na-ebu ọla edo, na-ebelata nnyonye anya ọla kọpa n'oge cyanidation.

• Ọgwụgwọ Oxidative: Usoro oxidative dị ka ịsa nri, bio-oxidation, ma ọ bụ oxidation oxidation na-arụ ọrụ nke ọma n'ịkwatu mineral sulfide na ịtọhapụ ọla edo agbakwunyere. N'ihe gbasara ọla kọpa sulfide ores, oxidative pretreatment ọ bụghị nanị na-eme ka mgbake ọla edo dịkwuo mma kamakwa ọ na-ebelata mmetụta ọjọọ nke ọla kọpa na cyanidation. Dịka ọmụmaatụ, ịsa nri na-agbanwe mineral sulfide ka ọ bụrụ oxides, na-eme ka ọla edo dịkwuo mfe ịnweta usoro ịhịa ahụ cyanide.

Usoro njikarịcha oke

• Ntụkwasị Cyanide: Ịchọpụta ezigbo ịta cyanide bụ isi. Ọ bụ ezie na mkpokọta dị elu nwere ike ịkwalite mgbasa ọla edo, ha na-edugakwa na oriri cyanide gabigara ókè, ọkachasị na ọnụnọ ọla kọpa. A na-achọ ụzọ ziri ezi, na n'ọnọdụ ụfọdụ, iji ntinye ntanye cyanide dị ala yana mgbakwunye ndị ọzọ nwere ike ịrụpụta nsonaazụ ka mma.

• Njikwa pH: Ịkwado ọkwa pH ziri ezi (na-emekarị gburugburu 9 - 12) na ngwọta leaching dị oké mkpa maka usoro cyanidation. N'ịkwasa ọla edo-ọla kọpa, imezi pH nwere ike inye aka ịchịkwa ọnụego mgbasa nke ma ọla kọpa na ọla edo. Iweda pH nke nta ntakịrị nwere ike ịkwalite ịcha ọla edo mgbe ụfọdụ site n'ịkwụsị leaching ọla kọpa.

• Okpomọkụ na mkpali: Ịkwalite okpomọkụ nwere ike ime ka mmeghachi omume cyanide dị ngwa ngwa, mana o nwere oke ya. Okpomọkụ dị ukwuu nwere ike ịbawanye mgbanwe cyanide ma mee ngwa ngwa oxidation ya n'ime ihe ndị na-adịghị arụ ọrụ. Mkparịta ụka zuru oke dị mkpa iji hụ na kọntaktị dị mma n'etiti ihe ndị dị na ore, ngwọta cyanide, na oxygen. Otú ọ dị, oke iwe iwe nwere ike ime ka ike gwụ ngwa ngwa ma dọkasịa ya.

Iji ihe mgbakwunye

• Amonia: Ịtinye amonia na usoro cyanidation nwere ike inyere aka ijikwa ọla kọpa site n'ịmepụta ogige siri ike na ya. Mgbagwoju anya ndị a na-egbochi ịmepụta ụfọdụ ogige ọla kọpa-cyanide nke na-egbochi mgbasa ọla edo. Otú ọ dị, iji amonia na-achọ nlebara anya nke ọma n'ihi nsị ya na mgbanwe ya, nke na-ebute ihe ize ndụ gburugburu ebe obibi.

• Glycine: Nnyocha e mere n'oge na-adịbeghị anya na-egosi na a pụrụ iji glycine jikọtara ya na obere ntanye nke cyanide iji wepụ ọla edo, ọlaọcha, na ọla kọpa site na ọla-ọla kọpa. Glycine complexes nwere ma cupric na cuprous ion, na-akwalite mgbasa ọla kọpa, ma nwee ike igbari ọkwa ngafe n'elu ọla edo na ọla kọpa. Usoro a nwere ike belata oriri cyanide ma ọ dịkarịa ala 75%.

ikpe Studies

Ọrụ Ngwuputa Ngwuputa Japan

Otu obere ọrụ igwu ala na Japan na-arụ ọrụ iji mee ka ọla edo nwetaghachi site na ọla kọpa bara ụba site na iji cyanidation. N'oge gara aga, ha nwetara kilogram 1.3 nke 94% ọlaedo dị ọcha mgbe e wepụsịrị ya. Iji melite mgbake, ha jiri lime mee ka pH na ammonia dịkwuo elu iji nyere aka wepụ ọla kọpa. Na mgbakwunye, ha mere mwepụ ọla kọpa site na carbon tupu mwepụ ọlaedo ma gbanwee voltaji na amperage n'oge mwepụ ọlaedo na ọnọdụ elektrọd. Usoro ndị a nyeere aka n'ịbawanye mgbake ọlaedo ahụ.

Ọla kọpa dị ala Ọstrelia-ọla edo

A na-ahazi ọla ọla kọpa dị obere n'Australia site na iji usoro “mmiri flotation—ọla kọpa-sulfur nkewa—sulfur concentrate leaching for gold”. Site na ịkwalite reagents flotation (iji nchikota butyl xanthate na ammonium dibutyl dithiophosphate dị ka ndị na-anakọta) na usoro a na-eruba (ọtụtụ ọkwa nke ịgbagharị na mgbanaka na sekit mechiri emechi), ha nwetara mgbake ọla kọpa nke 82.46% na mgbake ọla edo zuru oke nke 91.87%.

mmechi

Na-ebuli ihe sodium cyanide Usoro ịsa mmiri na ọla ọla kọpa dị mkpa maka imeziwanye ike akụ na ụba yana nkwado gburugburu ebe obibi nke igwu ọla edo. Site n'ịghọta ihe ịma aka ndị ọla kọpa na-eweta na mmejuputa atumatu dị ka ọgwụgwọ mbụ, njikarịcha usoro nhazi, na iji ihe mgbakwunye, enwere ike nweta nkwalite dị ukwuu na mgbake ọla edo na oriri cyanide. Nnyocha n'ọdịnihu na mpaghara a ga-elekwasị anya n'ịmepụta ụzọ dị mma na gburugburu ebe obibi, na-ebelata mmetụta nhazi ọla edo-ọla na gburugburu ebe obibi ma na-emewanye mmepụta ihe onwunwe.