Sodium cyanide hauv Heap Leaching: Ib qho tseem ceeb hauv Gold Mining

Nyob rau hauv lub realm ntawm niaj hnub mining, Heap Leaching tau tshwm sim raws li ib tug dav saws thiab nqi - zoo txoj kev rau extracting kub los ntawm qis-qib ores. Ntawm ntau yam ntawm cov txheej txheem no, cyanide, tshwj xeeb Sodium Cyanide (NaCN), ua lub luag haujlwm tseem ceeb.

Qhov tseem ceeb ntawm Sodium Cyanide hauv Kub Extraction

Kev txheeb cais qhia tias sodium cyanide yog siv nyob rau hauv ntau tshaj 80% ntawm Kub Extraction txheej txheem. Qhov siab ntawm daim ntawv thov no underscores nws qhov tseem ceeb hauv kev lag luam mining. Piv txwv li, hauv ib lub mine hauv Tanzania, tom qab kev taw qhia ntawm Sodium cyanide Raws li tus neeg sawv cev leaching, kev txhim kho zoo kawg nkaus tau pom. Cov ore hnav khaub ncaws rov qab tau nce siab los ntawm qhov qub 60% mus rau 85%, thiab cov zis kuj nce ntxiv. Cov nuj nqis no tsis tsuas yog qhia txog kev ua tau zoo ntawm sodium cyanide nyob rau hauv cov txheej txheem tau txais txiaj ntsig tab sis kuj tseem qhia txog nws lub luag haujlwm tseem ceeb hauv kev txhim kho cov nyiaj rov qab los thiab cov khoom ntim ntau lawm.

Lub Mechanism ntawm Sodium Cyanide hauv Heap Leaching

Nyob rau hauv cov txheej txheem heap leaching, qib qis kub ores los yog flotation tailings yog piled rau ntawm ib tug tshwj xeeb tsim impermeable ncoo. Tom qab ntawd, ib qho kev daws ntawm sodium cyanide yog sprayed hla lub pob zeb ore hauv ib lub voj voog. Thaum muaj cov pa oxygen (feem ntau yog los ntawm huab cua), sodium cyanide reacts nrog cov kub hauv cov ore. Cov tshuaj tiv thaiv tshuaj feem ntau tuaj yeem qhia tau raws li hauv qab no: 4Au + 8NaCN + O₂ + 2H₂O = 4Na[Au(CN)₂]+ 4NaOH. Los ntawm cov tshuaj tiv thaiv no, kub tsim ib qho yooj yim soluble, sodium aurocyanide (Na[Au(CN)₂]), uas tom qab ntawd yaj hauv cov tshuaj thiab tuaj yeem rov qab tau ntxiv.

Qhov zoo ntawm Kev Siv Sodium Cyanide hauv Heap Leaching

1. High Performance: Raws li pom nyob rau hauv Tanzanian mine piv txwv, sodium cyanide tuaj yeem yaj cov kub los ntawm cov ores, ua rau muaj txiaj ntsig zoo ntawm kev rov qab los. Qhov kev ua haujlwm siab no hauv kev rho tawm kub los ntawm qib qis-qib ores ua rau heap leaching nrog sodium cyanide ib qho kev xaiv siv tau rau cov mines uas yuav txwv tsis pub suav tias yog kev lag luam.

2. Nqi - kev ua tau zoo: Muab piv rau lwm txoj hauv kev ntawm kev rho tawm kub, kev siv sodium cyanide hauv heap leaching yog pheej yig. Tus nqi tag nrho ntawm cov txheej txheem heap leaching, suav nrog tus nqi ntawm sodium cyanide, feem ntau qis dua qhov nyuaj thiab lub zog - siv cov txheej txheem ntau ntxiv. Cov nqi no - kev ua tau zoo yog qhov tseem ceeb ua rau nws siv dav hauv kev lag luam mining.

Kev sib tw thiab kev ceev faj cuam tshuam nrog Sodium Cyanide

1. Toxicity: Sodium cyanide yog tshuaj lom heev. Ib qho kev xau lossis kev tuav tsis raug ntawm cov tshuaj cyanide tuaj yeem ua rau muaj kev hem thawj rau ib puag ncig thiab tib neeg kev noj qab haus huv. Yog li ntawd, kev ntsuas kev nyab xeeb nruj thiab kev tiv thaiv ib puag ncig yuav tsum nyob hauv qhov chaw thaum lub sijhawm khaws cia, kev thauj mus los, thiab siv sodium cyanide. Mines yuav tsum muaj qhov zoo - tsim cov txheej txheem kom tsis txhob muaj cyanide spills thiab txoj kev kho kom zoo rau cyanide - muaj cov kev daws teeb meem pov tseg.

2. Kev Cai Ua Raws Cai: Vim nws toxicity, kev siv ntawm sodium cyanide yog raws li kev cai nruj nyob rau hauv ntau lub teb chaws. Cov tuam txhab lag luam mining yuav tsum ua raws li cov cai no hais txog kev khaws cia, tuav, thiab pov tseg ntawm cyanide. Qhov no suav nrog kev saib xyuas cov qib cyanide tsis tu ncua hauv cov dej khib nyiab thiab xyuas kom lawv ua tau raws li cov qauv kev tso cai.

Nyob rau hauv xaus, sodium cyanide yog ib qho tseem ceeb reagent nyob rau hauv lub heap leaching txheej txheem rau kub mining. Nws cov kev ua haujlwm siab thiab tus nqi - kev ua tau zoo ua rau nws yog qhov kev xaiv zoo tshaj plaws rau rho tawm kub los ntawm qib qis ore. Txawm li cas los xij, qhov cuam tshuam txog kev lom thiab kev tswj hwm yuav tsum tau ua tib zoo tuav thiab ua raws li nruj kom ntseeg tau tias kev lag luam mining muaj kev ruaj ntseg thiab ruaj ntseg.