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

Pankhani yofufuza ndi kukumba golide, kupeza bwino golide kuchokera ku miyala ndi zinyalala zamtengo wapatali kwakhala nkhani yofunika kwambiri yofufuza. Pamene golide wapamwamba akuchepa pang'onopang'ono, kugwiritsa ntchito zinthu zochepa kwakopa chidwi chachikulu. Nkhaniyi ikuyang'ana kwambiri njira yochotsera golide kuchokera ku zinyalala zagolide wotsika mtengo, cholinga chake ndi 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

Misomali ya mgodi wagolide yomwe idagwiritsidwa ntchito poyesa uku idayamba kuchitidwa njira yopangira granulation. Kupangira granulation ndi gawo lofunika kwambiri pasadakhale chifukwa lingathandize kukonza kukhudzana pakati pa tinthu ta tailings ndi chinthu chotulutsa leaching, motero kumawonjezera mphamvu ya leaching. Misomali itatha, misomali inali yokonzeka kuyesa Cyanide leaching yotsatira.

2.2 Kuchiza

Masamba a mgodi wa golide adapakidwa mankhwala a alkaline kwa maola 8. Gawoli lisanakonzedwe ndi lofunika kwambiri chifukwa lingathandize kuswa mchere wina womwe uli m'masamba, zomwe zimapangitsa kuti golideyo azitha kupezeka mosavuta ndi mankhwala ochotsa cyanide . Limasinthanso pH ya malo a masango, zomwe zimathandiza pa kuyamwa kwa cyanide pambuyo pake.

2.3 Cyanide Leaching

Kuchotsa cyanide kunachitika pogwiritsa ntchito Sodium cyanide ngati chothandizira kuchotsa. Kuchuluka kwa Sodium Cyanide komwe kunagwiritsidwa ntchito kunali 1 kg/t. Nthawi yochotsa inayikidwa pa maola 24, ndipo panthawi yochotsa, pH ya yankho inasungidwa mkati mwa 10.0 - 12.0. pH yoyenerera ndiyofunikira kuti zitsimikizire kukhazikika kwa cyanide ion komanso kugwira ntchito bwino kwa kuchotsa.

3. Zotsatira Zakuyesa

Zotsatira za kafukufukuyu zasonyeza kuti pansi pa mikhalidwe yomwe yatchulidwa pamwambapa, kuchuluka kwa kuchotsedwa kwa golide kumatha kufika pa 60%. Izi zikusonyeza kuti njira yophatikizana yochotsera golide pogwiritsa ntchito alkaline pretreatment ndi cyanide leaching ndi yothandiza pochotsa golide kuchokera ku migodi ya golide iyi. Kuchotsedwa kwa alkaline kwa maola 8, 1 kg/t ya sodium cyanide dosing, 24 - hour leaching time, ndi pH range ya 10.0 - 12.0 zinapereka njira yabwino kwambiri yochotsera golide.

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.