Kafukufuku pa Pretreatment Technologies of Gold Amayang'ana kwambiri Cyanide Leaching

Kutulutsa kwa cyanide Gold Concentrates ndi njira tingachipeze powerenga golide m'zigawo. Komabe, chifukwa cha zovuta za ores, Kudzimbidwa nthawi zambiri zimafunika kupititsa patsogolo luso la leaching. Nkhaniyi ikugwirizana ndi ukadaulo wa pretreatment m'mbuyomu Cyanide Leaching, ndicholinga chopereka chiwongolero pakupanga kothandiza.

I. Physical Pretreatment Technologies

1. Kupera Kwabwino

Kuyika kwa golideyo kumatsitsidwa mpaka 325 mesh kapena kupitilira apo kudzera mu zida monga mphero za mpira kuti asiyanitse bwino mchere wa golide ku gangue. Mchitidwe wa mgodi wina wa golidi umasonyeza kuti kugaya bwino kumatha kuonjezera malo owonetsera golidi ndi 40%, ndipo mlingo wa leaching ukhoza kuwonjezeka ndi 8-12%.

2. Kuwunika ndi Kuchotsa Chidetso

Zida monga zowonera zozungulira zozungulira zimagwiritsidwa ntchito pochotsa zonyansa monga tchipisi tamatabwa ndi zidutswa zapulasitiki. Mlandu wogwiritsira ntchito mu concentrator wina umasonyeza kuti pambuyo poyang'ana, kuchuluka kwa kutsekeka kwa zida kumachepetsedwa ndi 70%, ndi kuwonongeka kwa adsorption. cyanide yafupika ndi 5%.

3. Flotation Reagent Kuchotsa

Kwa flotation imayang'ana, njira ziwiri za "regrinding - reagent kuchotsa" imatengedwa kuti ichotse bwino ma reagents oyandama monga xanthate ndi No. 2 mafuta. Deta ya mafakitale ikuwonetsa kuti pambuyo pochotsa reagent, kumwa kwa Sodium Cyanide imachepetsedwa ndi 35%, ndipo kuchuluka kwa ma adsorption a activated carbon kumawonjezeka ndi 15%.

II. Chemical Pretreatment Technologies

1. Alkaline Pretreatment

Laimu amawonjezeredwa kuti asinthe pH kukhala 10-11. kotero kuti zinthu zovulaza monga zinki, arsenic, ndi antimoni zimapanga mchere wosungunuka. Pambuyo pogwiritsira ntchito mgodi wina wa golidi wokhala ndi arsenic, kumwa kwa cyanide kumachepetsedwa kuchoka pa 12 kg / t kufika pa 6.5 kg / t, ndipo kuchuluka kwa leaching kumawonjezeka ndi 9%.

2. Oxidation Pretreatment

• Air Oxidation

Pogwiritsa ntchito mpweya ndi kusonkhezera kuti zinthu zochepetsera zikhale ndi okosijeni, mumgodi wina wagolide wamtundu wa pyrrhotite, mutatha kuchiritsidwa, mphamvu zamkati zimawonjezeka kuchokera -150 mV mpaka +200 mV, ndipo nthawi ya cyanidation imafupikitsidwa ndi 40%.

• Kuwonjezera Ma Oxidants

Pamene mlingo wa nitrate ndi 0.5 kg / t, kuchuluka kwa ayoni wa sulfide kumatha kuchepetsedwa ndi 60%, ndipo kuchuluka kwa leaching kumawonjezeka ndi 7%. Mu miyala ina yamkuwa-golide, kumwa kwa sodium cyanide imachepetsedwa ndi 40% pambuyo pothandizidwa ndi hydrogen peroxide.

3. Synergistic Leaching ndi Ammonia-Cyanide

Madzi a ammonia (omwe ali ndi 1-3%) amawonjezeredwa ku golide wokhala ndi mkuwa kuti apange ammonia okhazikika amkuwa. Mayeso a mafakitale akuwonetsa kuti kuchuluka kwa leaching yamkuwa kumatha kuwongoleredwa pansi pa 5%, ndipo kutsika kwa golide kumawonjezeka ndi 12%.

III. Biological Pretreatment Technologies

Tizilombo tating'onoting'ono monga Thiobacillus ferrooxidans amagwiritsidwa ntchito kuwononga mchere wa sulfide. Pambuyo pa masiku 20 a oxidation yachilengedwe mumgodi wina wagolide, kuchuluka kwa kuwonongeka kwa pyrite kumafika 92%, ndipo kutsika kwa golide kumawonjezeka kuchoka pa 35% mpaka 88%. Tekinoloje iyi ili ndi mwayi wokonda zachilengedwe, koma nthawi ya chithandizo ndi yayitali (masiku 15-30).

IV. Malingaliro Osankha Njira

Kachitidwe ka pretreatment iyenera kusankhidwa mozama molingana ndi mtundu wa ore:

• Kwa miyala yokhala ndi sulfure wambiri komanso arsenic wochuluka, makutidwe ndi okosijeni achilengedwe kapena kuwotcha kumayenera kutsatiridwa.

• Kwa golide wokhala ndi mkuwa, dongosolo la ammonia-cyanide likulimbikitsidwa.

• Pakuti flotation likunena, reagent kuchotsa mankhwala ayenera kulimbikitsidwa.

• Kwa ore wamba, njira yophatikizira ya leaching ya alkaline ndi oxidant yowonjezera ingatengedwe.

Kutsiliza:

Kugwiritsa ntchito mwanzeru matekinoloje opangira mankhwala kumatha kusintha kwambiri cyanide leaching effect. M'tsogolomu, m'pofunika kupititsa patsogolo maphunziro abwino komanso otsika omwe amagwiritsira ntchito mankhwala opangira mankhwala kuti apititse patsogolo chitukuko chobiriwira cha matekinoloje ochotsa golide.