Qhov cuam tshuam ntawm Sodium Cyanide Leaching Sijhawm ntawm Tus Nqi Rov Qab

Introduction

Kev rho tawm cyanide yog ib txoj kev siv dav dav rau kev rho tawm kub ntawm cov hlau kub. Ntawm ntau yam uas cuam tshuam rau cov txheej txheem rho tawm cyanide , lub sijhawm rho tawm ntawm sodium cyanide ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab qhov nrawm rov qab ntawm kub. Kev nkag siab txog kev sib raug zoo ntawm lawv yog qhov tseem ceeb rau kev ua kom zoo dua ntawm kev rho tawm cyanide thiab txhim kho kev lag luam ntawm kev tsim kub.

Cov txheej txheem ntawm Cyanide Leaching

Hauv cov txheej txheem leaching cyanide, kub hauv cov ore reacts nrog Sodium Cyanide nyob rau hauv qhov muaj oxygen los tsim cov kub cyanide complexes soluble. Cov tshuaj tiv thaiv tuaj yeem hais yooj yim li: 4Au + 8NaCN + O₂ + 2H₂O = 4Na[Au(CN)₂] + 4NaOH. Cov tshuaj tiv thaiv no tshwm sim rau ntawm qhov chaw ntawm cov khoom kub, thiab qhov nrawm thiab qhov dav ntawm cov tshuaj tiv thaiv raug cuam tshuam los ntawm ntau yam, nrog rau lub sijhawm leaching yog ib qho tseem ceeb.

Lub Sijhawm Leaching cuam tshuam li cas rov qab tus nqi

Thawj theem

Thaum pib ntawm cov txheej txheem leaching, raws li lub sij hawm nce mus, tus nqi ntawm cov kub yaj mus rau hauv cov tshuaj nce sai heev. Kub hais nyob rau saum npoo ntawm cov ore yog sai heev los ntawm cyanide ions. Lub ntsej muag tshiab ntawm kub muab ntau qhov chaw tshuaj tiv thaiv, thiab qhov concentration gradient nruab nrab ntawm cov khoom kub thiab cov kev daws teeb meem txhawb qhov kev sib tawg tas li ntawm kub. Thaum lub sij hawm no, tus nqi leaching ntawm kub qhia tau hais tias muaj kev nce siab, thiab tus nqi rov qab tau nce ntxiv nrog rau ncua sij hawm leaching.

Nruab nrab theem

Raws li cov leaching txuas ntxiv mus, cov kub nyob rau sab nrauv ntawm cov ore hais yog maj mam yaj, thiab cov seem kub yog qhov tob rau hauv cov ore hais los yog muaj ib tug complex embedding lub xeev. Lub sijhawm no, qhov leaching tus nqi pib qeeb. Txawm hais tias cov tshuaj tiv thaiv tseem tab tom ua, qhov diffusion ntawm cyanide ions mus rau saum npoo ntawm cov khoom kub ua nyuaj dua vim yog tsim cov txheej txheem saturated nyob ib ncig ntawm cov khoom thiab kev cuam tshuam ntawm qee cov khoom siv tshuaj tiv thaiv. Txawm li cas los xij, tus nqi rov qab tseem nce ntxiv, tab sis ntawm qhov qeeb qeeb dua piv rau theem pib.

Tom qab Theem

Tom qab lub sijhawm ntev ntawm kev ntxuav kub, qhov ceev ntawm kev ntxuav kub yuav mus txog qhov nqi tas li. Feem ntau ntawm cov kub uas yooj yim nrhiav tau tau yaj, thiab cov kub seem yog nyob rau hauv lub xeev zoo heev, qhwv nruj nreem los ntawm lwm cov zaub mov, lossis muaj nyob rau hauv daim ntawv uas nyuaj rau cuam tshuam nrog cyanide. Kev ncua sijhawm ntxuav ntawm theem no tsis muaj feem cuam tshuam rau kev nce tus nqi rov qab. Qhov tseeb, kev txuas ntxiv mus ntev lub sijhawm ntxuav yuav ua rau muaj qee qhov tsis zoo, xws li kev siv Sodium cyanide ntau ntxiv , kev siv zog rau kev ua haujlwm ntawm cov khoom siv, thiab kev pheej hmoo ntawm kev ua qias tuaj ib puag ncig vim yog kev raug cov tshuaj cyanide ntev dua.

Case Kev tshawb fawb

Case 1: A Kub Mine hauv Shandong, Suav

Hauv ib lub mine kub hauv Shandong, cov kws tshawb fawb tau ua ntau yam kev sim ntawm cyanide leaching. Lawv pom tias thaum lub sij hawm leaching yog 12 teev, tus nqi rov qab kub tsuas yog 60%. Raws li lub sij hawm leaching tau ncua mus rau 24 teev, tus nqi rov qab tau nce mus rau 80%. Txawm li cas los xij, thaum lub sij hawm leaching txuas ntxiv mus rau 36 teev, tus nqi rov qab tsuas yog nce me ntsis mus rau 82%. Qhov no qhia tau hais tias nyob rau hauv ib qho chaw, ncua lub sij hawm leaching tuaj yeem txhim kho tus nqi rov qab zoo, tab sis tom qab ncav cuag ib qho taw tes, qhov cuam tshuam ntawm kev nce tus nqi rov qab los ntawm kev ncua lub sij hawm leaching ua negligible.

Case 2: Australian Gold Mine

Nyob rau hauv Australian kub mine, txawv lub sij hawm leaching tej yam kev mob tau teem rau txawv batch ntawm ore. Rau ore nrog ib qho yooj yim muaj pes tsawg leeg, thaum lub sij hawm leaching yog 18 teev, tus nqi rov qab ntawm 85%. Tab sis rau ore nrog ib tug complex muaj pes tsawg leeg muaj ntau impurities, txawm tom qab 36 teev ntawm leaching, tus nqi rov qab tsuas yog mus txog 75%. Qhov no qhia tau hais tias qhov cuam tshuam ntawm leaching lub sij hawm ntawm tus nqi rov qab los kuj muaj feem xyuam rau qhov xwm ntawm cov ore. Ores nrog complex compositions yuav xav tau ntev leaching sij hawm kom ua tau raws li qhov txaus siab rov qab, tab sis kuj muaj qhov txwv.

Optimization ntawm Leaching Sijhawm

Txhawm rau txhim kho lub sijhawm leaching, ntau yam yuav tsum tau txiav txim siab ua tiav. Ua ntej, nws yog ib qho tsim nyog yuav tsum tau ua cov ncauj lus kom ntxaws mineralogical tsom xam ntawm cov ore kom nkag siab txog qhov tshwm sim ntawm kub, xws li qhov loj me ntawm cov kub, qhov degree ntawm embedding, thiab cov ntsiab lus ntawm cov minerals txuam. Raws li qhov no, lub sijhawm pib leaching tsim nyog tuaj yeem kwv yees. Qhov thib ob, thaum lub sij hawm leaching txheej txheem, kev soj ntsuam lub sij hawm ntawm lub concentration ntawm kub nyob rau hauv lub leaching tov thiab cov seem kub cov ntsiab lus nyob rau hauv lub ore tuaj yeem nqa tawm los ntawm kev kuaj thiab tshuaj xyuas. Raws li kev hloov pauv ntawm cov ntaub ntawv no, lub sijhawm leaching tuaj yeem hloov kho raws sijhawm. Thib peb, ua ke nrog lwm yam cuam tshuam rau cov txheej txheem leaching, xws li cov ntsiab lus ntawm sodium cyanide, pH tus nqi ntawm cov tshuaj, thiab qhov kub thiab txias, kev npaj ua kom zoo tshaj plaws tuaj yeem tsim kom ua tiav qhov zoo tshaj plaws sib npaug ntawm tus nqi rov qab thiab cov nqi tsim khoom.

xaus

Lub sij hawm leaching ntawm sodium cyanide muaj qhov cuam tshuam loj rau kev rov qab los ntawm kub hauv cov txheej txheem cyanide leaching. Hauv thawj theem thiab nruab nrab ntawm leaching, ncua lub sij hawm leaching tuaj yeem ua rau kom rov zoo dua. Txawm li cas los xij, tom qab ncav cuag ib theem, txuas ntxiv lub sij hawm leaching muaj me ntsis cuam tshuam rau kev txhim kho tus nqi rov qab thiab yuav ua rau muaj qee qhov tsis zoo. Ntau hom ores muaj qhov sib txawv ntawm lub sijhawm leaching, uas yuav tsum tau txiav txim siab los ntawm kev xav txog ntau yam thiab cov kev sim tiag tiag. Los ntawm optimizing lub sij hawm leaching, qhov ua tau zoo ntawm kub cyanide leaching tuaj yeem txhim kho, thiab cov txiaj ntsig zoo ntawm kev lag luam thiab ib puag ncig tuaj yeem ua tiav hauv kev lag luam kub mining.