Sodium cyanide Leaching of Gold from Low - Grade Gold - Bearing Tailings

Pankhani ya migodi ndi kukumba golide, kubweza bwino kwa golide kuchokera ku miyala yamtengo wapatali ndi michira yakhala nkhani yofunika kwambiri pakufufuza. Pamene madipoziti a golide apamwamba akuchepa pang'onopang'ono, kugwiritsa ntchito zinthu zotsika kwachititsa chidwi kwambiri. Nkhaniyi ikufotokoza za Cyanide kutulutsa golide kuchokera ku michira yagolide yotsika, ndicholinga chofuna kupereka chidziwitso chofunikira pankhaniyi.

1. Introduction

Golide wocheperako - zokhala ndi michira, zomwe ndi zotsalira pambuyo pakukonza koyambirira kwa golide, zimakhalabe ndi golide wina. Chifukwa cha zolemba zawo zovuta za mineralogical komanso golide wotsika, kuchotsa golide kuchokera ku michira iyi kumakhala kovuta. Komabe, ndi kuwongolera kosalekeza kwaukadaulo wochotsa, ndizotheka kubweza golide kuchokera kwa iwo. Cyanide leaching yakhala ikugwiritsidwa ntchito kwambiri m'mafakitale a migodi ya golide chifukwa chochita bwino kwambiri komanso kusankha bwino pakuchotsa golide.

2. Njira Zoyesera

2.1 Kukonzekera Zitsanzo

Miyendo ya migodi ya golidi yomwe idagwiritsidwa ntchito poyeserayi idayamba kuchitidwa ndi granulation. Granulation ndi gawo lofunika kwambiri lokonzekera chifukwa limatha kusintha kulumikizana pakati pa tinthu tating'onoting'ono ndi tinthu tating'onoting'ono, potero kumapangitsa kuti ntchitoyo ikhale yabwino. Pambuyo granulation, tailings anali okonzeka wotsatira Kutentha kwa cyanide mayesero.

2.2 Kuchiza

Miyendo ya migodi ya golide idakonzedwa kale ndi yankho la alkaline kwa maola 8. Njira yopangiratu iyi ndi yofunika kwambiri chifukwa imathandizira kuphwanya mamineral ena omwe ali mumchira, ndikupangitsa kuti golide azitha kupezeka mosavuta. cyanide leaching agent. Imasinthanso malo a pH a ma tailings, omwe ndi opindulitsa pakuchita kwa cyanide leaching.

2.3 Cyanide Leaching

Kutulutsa kwa cyanide kumagwiritsidwa ntchito Sodium cyanide monga wothandizira leaching. Kuchuluka kwa Sodium Cyanide ntchito inali 1 kg/t. Nthawi ya leaching inayikidwa pa maola 24, ndipo panthawi ya leaching, pH ya yankho inasungidwa mkati mwa 10.0 - 12.0. Phindu loyenera la pH ndilofunika kuonetsetsa kukhazikika kwa cyanide ion komanso mphamvu ya leaching reaction.

3. Zotsatira Zakuyesa

Zotsatira zoyeserera zidawonetsa kuti pansi pazimene tatchulazi, kuchuluka kwa golide kumatha kufika kupitilira 60%. Izi zikuwonetsa kuti njira yophatikizira yopangira zinthu zamchere ndi cyanide leaching ndi yothandiza pochotsa golide ku michira ya migodi ya golideyi. The 8 - maola alkaline pretreatment, 1 kg/t wa sodium cyanide mlingo, 24 - maola leaching nthawi, ndi pH osiyanasiyana 10.0 - 12.0 anapereka wokometsedwa magawo pa ndondomeko leaching.

4. Kufunika ndi Tsogolo la Tsogolo

Kugwiritsa ntchito bwino kwa njira iyi ya cyanide leaching pazitsulo zokhala ndi golide zotsika kumakhala ndi tanthauzo lalikulu. Choyamba, imapereka njira yothandiza yobwezeretsanso golide kuchokera ku michira, kuchepetsa zinyalala ndikuwonjezera kugwiritsa ntchito zinthu. Kachiwiri, ikhoza kubweretsa phindu pazachuma kumakampani amigodi pobweza golide wamtengo wapatali kuchokera ku michira yomwe idatayidwa kale.

M'tsogolomu, kafukufuku wina akhoza kuchitidwa kuti izi zitheke. Mwachitsanzo, kuyang'ana mitundu yosiyanasiyana yamankhwala kuti muwongolere kumasulidwa kwa golide, kapena kuphunzira kugwiritsa ntchito njira zina zochotsera cyanide kuti muchepetse kuwononga chilengedwe. Kuphatikiza apo, kugwiritsa ntchito ukadaulo uwu pamitundu yosiyanasiyana yamitundu yotsika yagolide - kuyenera kufufuzidwa kuti mudziwe zonse.

Pomaliza, njira ya cyanide leaching yomwe yaphunziridwa pano ikupereka njira yodalirika yochotsera golide kuchokera ku michira ya golide yotsika, ndipo kufufuza kosalekeza ndi kuwongolera m'derali kudzathandizira chitukuko chokhazikika cha migodi ya golide.