Nnyocha na teknụzụ Pretreatment nke Gold Concentrates tupu Cyanide Leaching

Cyanide leaching nke Ntụkwasị ọla edo bụ usoro kpochapụwo maka mmịpụta ọla edo. Otú ọ dị, n'ihi mgbagwoju anya ọdịdị nke ore. Esemokwu a na-achọkarị iji melite arụmọrụ leaching. Isiokwu a n'usoro combs site pretreatment teknụzụ tupu Cyanide leaching, na-achọ ịnye ntụaka maka mmepụta ihe bara uru.

I. Teknụzụ Pretreatment Anụ ahụ

1. Ezi egweri

A na-akụtu ọla edo na ntupu 325 ma ọ bụ ka mma site na akụrụngwa dịka igwe igwe bọọlụ iji kewapụ mineral ọla edo na gangue. Omume a na-eme n'otu ebe a na-egwupụta ọla edo na-egosi na ịhịa aka nke ọma nwere ike ime ka oghere ọla edo dịkwuo 40%, yana ọnụego leaching nwere ike ịbawanye site na 8-12%.

2. Nyochaa na iwepụ adịghị ọcha

A na-eji ngwa ndị dị ka ihuenyo na-ama jijiji na-ewepụ ihe adịghị ọcha dị ka ibe osisi na iberibe plastik. Okwu ngwa na otu concentrator na-egosi na mgbe nyochachara, a na-ebelata ugboro ole mgbochi akụrụngwa site na 70%, yana mfu adsorption nke cyanide na-ebelata 5%.

3. Mwepụ Reagent Flotation

N'ihi na flotation concentrates, a abụọ-ogbo usoro nke "regrinding - reagent mwepụ" na-nakweere n'ụzọ dị irè wepụ flotation reagents dị ka xanthate na No. 2 mmanụ. Industrial data na-egosi na mgbe reagent mwepụ, oriri nke sodium cyanide na-ebelata site na 35%, yana ọnụego adsorption nke arụ ọrụ carbon a na-amụba site na 15%.

II. Teknụzụ Pretreatment Chemical

1. Ọgwụgwọ alkaline

A na-agbakwunye lime iji dozie pH na 10-11. nke mere na ihe ndị na-emerụ ahụ dị ka zinc, arsenic, na antimony na-etolite nnu na-agbaze. Mgbe etinyere ya na ụfọdụ ọla edo arsenic nwere arsenic, a na-ebelata oriri cyanide site na 12 kg / t ruo 6.5 kg / t, yana mmụba na-abawanye site na 9%.

2. Ngwọta oxidation

• Oxidation ikuku

Site na ikuku na ịkpali oxidize na-ebelata ihe ndị na-ebelata, na ụfọdụ ụdị ọla edo pyrrhotite, mgbe a gwọchara ya, a na-abawanye ikike pulp site na -150 mV ruo + 200 mV, na oge cyanidation na-ebelata site na 40%.

• Mgbakwunye nke Oxidants

Mgbe usoro nke nitrate lead bụ 0.5 kg / t, ịta nke ion sulfide nwere ike ibelata site na 60%, ọnụ ọgụgụ leaching na-abawanye site na 7%. Na ụfọdụ ọla kọpa-ọlaed ore, oriri nke sodium cyanide na-ebelata 40% mgbe ejiri hydrogen peroxide mechaa ya.

3. Mmekọrịta mmekọrịta na Amonia-Cyanide

A na-agbakwunye mmiri Amonia (nke nwere 1-3%) na ọla edo nwere ọla kọpa iji mepụta ogige amonia siri ike nke ọla kọpa. Nnwale ụlọ ọrụ mmepụta ihe na-egosi na enwere ike ịchịkwa ọnụego ncha ọla kọpa n'okpuru 5%, yana ọnụ ahịa leaching ọla edo na-abawanye site na 12%.

III. Teknụzụ Ngwọta Ngwọta Ndụ

A na-eji microorganisms dị ka Thiobacillus ferrooxidans na-emebi mineral sulfide. Mgbe ụbọchị 20 nke oxidation nke ndu na ụfọdụ ọla edo refractory, ọnụ ọgụgụ ire ere nke pyrite ruru 92%, na ọnụego leaching ọla edo na-abawanye site na 35% ruo 88%. Nkà na ụzụ a nwere uru nke enyi na gburugburu ebe obibi, ma oge ọgwụgwọ dị ogologo (15-30 ụbọchị).

IV. Aro maka Nhọrọ Usoro

Ekwesịrị ịhọrọ usoro ọgwụgwọ tupu oge eruo dịka ọdịdị nke ọla:

• Maka ọla ndị nwere sọlfọ dị elu yana ọdịnaya arsenic dị elu, a ga-akacha mma nabata oxidation bayoloji ma ọ bụ ntụ ntụ.

• Maka ọla edo nwere ọla kọpa, a na-atụ aro usoro amonia-cyanide.

• Maka itinye uche n'ụda mmiri, ọ dị mkpa ka a kwalite ọgwụgwọ reagents.

• Maka ọla ndị a na-ahụkarị, enwere ike ịnakwere usoro nchịkọta nke alkaline leaching na mgbakwunye oxidant.

mmechi:

Ngwa ezi uche dị na teknụzụ pretreatment nwere ike melite mmetụta leaching cyanide. N'ọdịnihu, ọ dị mkpa ịga n'ihu na-amụ nke ọma na obere-eri jikọtara pretreatment usoro iji kwalite green mmepe nke gold mmịpụta teknụzụ.