Lead Oxide Imakulitsa Kutuluka kwa Golide mu Michira ya Cyanide

Introduction

Cyanidation ndi njira yomwe imagwiritsidwa ntchito kwambiri pochotsa golide ku ore. Komabe, masamba a cyanide nthawi zambiri amakhala ndi golide wotsalira, zomwe zimakhala zovuta kuchira chifukwa cha mphamvu ya mchere wogwirizana. Kupititsa patsogolo luso la leaching la golide kuchokera cyanide ma tailings ndi ofunika kwambiri pakubwezeredwa kwa zinthu komanso phindu lazachuma. Mu kafukufuku waposachedwapa, zapezeka kuti oxide kutsogolera itha kukhala ndi gawo labwino pakukweza kutsika kwa golide mu michira ya cyanide.

Vuto la Kutsika kwa Golide Wotsika Pamiyeso ya Cyanide

Vuto lalikulu pakubweza golide kuchokera ku michira ya cyanide lili mumpangidwe wovuta wa mineralological. Cyanide yotsalira m'michira imatha kupangitsa golide kuchitapo kanthu ndi sulfide wachitsulo chogwirizana (monga pyrrhotite). Izi zimapanga filimu ya Au/Sx passivation pamwamba pa tinthu tagolide. Kanema wa Passivation uyu amakhala ngati chotchinga, chomwe chimalepheretsa kulumikizana kwabwino pakati pa golide ndi cyanide solution, zomwe zimapangitsa kuti pakhale kutsika kocheperako. leaching rate wa golide.

Momwe Lead Oxide Imathandizira Kutulutsa Golide

Chemical Reaction Mechanism

Lead oxide imatenga nawo gawo muzochita zingapo zamankhwala panthawi ya leaching. Choyamba, lead oxide imatha kuchitapo kanthu ndi filimu ya passivation yomwe imapangidwa pamwamba pa golide. Izi zimaphwanya filimu ya passivation, ndikuisintha kukhala mchere wosungunuka. Chotsatira chake, pamwamba pa golide amawonekeranso, kulola kuti cyanide igwirizane ndi golide. Kachiwiri, lead oxide imatha kukhala ngati oxidant mu leaching system. Pamaso pa lead oxide, mphamvu ya okosijeni ya dongosololi imasinthidwa, zomwe zimapindulitsa kuti oxidation ya golide ipange sungunuka golide cyanide complexes.

Electrochemical Mechanism

Pali kusiyana kwamagetsi komwe kungatheke pakati pa golide ndi chotsitsa cha lead oxide. Kusiyana kumeneku kumapangitsa kuti pakhale batire yoyamba mkati mwa leaching system. Mu batire yoyamba iyi, golidi amagwira ntchito ngati anode ndipo amalowetsedwa ndi okosijeni, pomwe chotsitsa cha lead oxide chimakhala ngati cathode. Njira ya electrochemical iyi, yomwe imadziwika kuti contact corrosion, imathandizira kusungunuka kwa golide, potero kuwongolera kuchuluka kwa golide.

Chitsimikizo Choyesera

Zida Zoyesera ndi Njira

Ochita kafukufuku anasankha zitsanzo za cyanide tailings zoyesera. Zitsanzo za tailings zinali zodziwika poyamba kuti zidziwe momwe mchere wawo ulili komanso golide. Kenako, milingo yosiyanasiyana ya lead oxide idawonjezedwa ku cyanide leaching system. Mikhalidwe ya leaching, monga nthawi ya leaching, kutentha, ndi ndende ya cyanide, zinkayendetsedwa bwino. Kuyesera kofananirako kunachitika pofuna kutsimikizira kuti zotsatira zake ndi zolondola. Kuphatikiza apo, njira zowunikira zapamwamba, monga kusanthula ma electron microscopy (SEM) ndi X-ray photoelectron spectroscopy (XPS), zidagwiritsidwa ntchito kusanthula ma morphology apamwamba komanso kusintha kwamankhwala a tinthu tating'onoting'ono ta golide isanayambe komanso itatha.

Zotsatira Zoyesera

Zotsatira zoyeserera zidawonetsa kuti kuwonjezeredwa kwa lead oxide kumawonjezera mphamvu ya leaching ya golide mu michira ya cyanide. Poyerekeza ndi gulu lolamulira popanda kutsogolera oxide kuwonjezera, ndi kutulutsa golide chiwonjezeko chinawonjezeka ndi chiwerengero chodabwitsa. Mwachitsanzo, pakuyesa kwina, kuchuluka kwa golide kutsika kuchokera pamtengo wotsika kufika pa [X]%. Pa nthawi yomweyo, kumwa Sodium Cyanide inachepetsedwanso pamlingo wakutiwakuti. Kusanthula kwa SEM ndi XPS kunatsimikiziranso kuti lead oxide idachitadi ndi filimu yodutsa pamwamba pa golide, ndipo zinthu zatsopano zamadzimadzi zidawonekera pamwamba pa tinthu tagolide titawonjezedwa ndi lead oxide, yomwe inali yogwirizana ndi momwe amachitira.

Chiyembekezo cha Ntchito

Kupezeka kwa kugwiritsa ntchito lead oxide kuti apititse patsogolo kutuluka kwa golide mu michira ya cyanide kuli ndi mwayi wogwiritsa ntchito. M'makampani amigodi, ukadaulo uwu ukhoza kugwiritsidwa ntchito pazomera zomwe zilipo kale za cyanide tailings. Pongowonjezera lead oxide pakupanga leaching, kuchuluka kwa golide kumatha kuwongolera popanda kukweza zida zazikulu. Izi sizimangowonjezera phindu lazachuma lazinthu zama tailings komanso zimachepetsa kuwonongeka kwa chilengedwe komwe kumachitika chifukwa cha kusungidwa kwanthawi yayitali kwa michira yokhala ndi golidi. Kuphatikiza apo, njirayi imatha kukulitsidwanso pakuchiza ma ore ena agolide, kupereka njira yatsopano yochotsera golide.

Pomaliza, lead oxide ikuwonetsa kuthekera kwakukulu pakukweza kutsika kwa golide mu michira ya cyanide. Kupyolera mu kumvetsetsa mozama za njira yake yopititsira patsogolo komanso kukhathamiritsa kosalekeza kwa zochitika zoyesera, lusoli likuyembekezeka kuchitapo kanthu pa chitukuko chamtsogolo cha migodi ya golide.