Lead Oxide Txhim kho qhov Leaching ntawm Kub hauv Cyanide Tailings

Introduction

Kev siv cyanidation yog ib txoj kev siv dav dav rau kev rho tawm kub ntawm cov ores. Txawm li cas los xij, cov cyanide tailings feem ntau muaj qee qhov kub seem, uas nyuaj rau rov qab tau vim muaj kev cuam tshuam ntawm cov zaub mov cuam tshuam. Kev txhim kho qhov ua tau zoo ntawm kev rho tawm kub ntawm cyanide tailings yog qhov tseem ceeb heev rau kev siv cov peev txheej rov ua dua tshiab thiab cov txiaj ntsig kev lag luam. Hauv kev tshawb fawb tsis ntev los no, nws tau pom tias cov hlau lead oxide tuaj yeem ua lub luag haujlwm zoo hauv kev txhim kho kev rho tawm kub hauv cyanide tailings.

Qhov teeb meem ntawm Tsawg Kub Leaching Rate hauv Cyanide Tailings

Qhov teeb meem tseem ceeb hauv kev rov qab tau kub los ntawm cov cyanide tailings yog nyob rau hauv cov mineralogical sib xyaw ua ke. Cov cyanide seem hauv cov tailings tuaj yeem ua rau kub cuam tshuam nrog sulfides ntawm cov hlau cuam tshuam (xws li pyrrhotite). Qhov kev cuam tshuam no tsim cov zaj duab xis Au/Sx passivation ntawm qhov chaw ntawm cov khoom kub. Cov zaj duab xis passivation no ua haujlwm ua ib qho thaiv, tiv thaiv kev sib cuag zoo ntawm kub thiab cyanide kua, yog li ua rau muaj qhov ceev leaching qis ntawm kub.

Yuav Ua Li Cas Lead Oxide Txhim Kho Kub Leaching

Chemical Reaction Mechanism

Lead oxide koom nrog ntau yam tshuaj tiv thaiv thaum lub sij hawm leaching txheej txheem. Ua ntej, txhuas oxide tuaj yeem hnov ​​​​mob nrog cov zaj duab xis passivation tsim rau ntawm qhov chaw kub. Cov tshuaj tiv thaiv no rhuav tshem cov zaj duab xis passivation, hloov mus rau hauv cov ntsev soluble. Raws li qhov tshwm sim, qhov kub ntawm qhov chaw raug nthuav tawm dua, tso cai rau cyanide ua rau kub. Qhov thib ob, cov hlau lead oxide tuaj yeem ua oxidant nyob rau hauv lub leaching system. Nyob rau hauv lub xub ntiag ntawm txhuas oxide, lub peev xwm oxidation ntawm lub kaw lus yog kho, uas yog zoo rau oxidation ntawm kub los ua soluble kub cyanide complexes.

Electrochemical Mechanism

Muaj qhov hluav taws xob muaj peev xwm sib txawv ntawm cov kub thiab cov khoom txo qis ntawm cov hlau lead oxide. Qhov sib txawv muaj peev xwm no ua rau tsim cov roj teeb tseem ceeb hauv lub leaching system. Hauv cov roj teeb tseem ceeb no, kub ua haujlwm raws li anode thiab dhau oxidation, thaum txo cov khoom siv lead ua oxide ua raws li cathode. Cov txheej txheem electrochemical no, hu ua kev sib cuag corrosion, zoo nrawm rau kev tawg ntawm kub, yog li txhim kho tus nqi rho tawm kub.

Kev kuaj xyuas

Kev sim cov ntaub ntawv thiab cov txheej txheem

Cov kws tshawb fawb tau xaiv tus neeg sawv cev cyanide tailings cov qauv rau kev sim. Cov tailings kuaj thawj zaug los txiav txim seb lawv cov ntxhia muaj pes tsawg leeg thiab cov ntsiab lus kub. Tom qab ntawd, ntau qhov sib txawv ntawm cov hlau lead oxide tau ntxiv rau hauv cyanide leaching system. Cov txheej txheem leaching, xws li lub sij hawm leaching, kub, thiab cyanide concentration, tau ua tib zoo tswj. Ib qho kev sim sib luag tau ua tiav los xyuas kom meej qhov tseeb ntawm cov txiaj ntsig. Tsis tas li ntawd, cov txheej txheem analytical siab heev, xws li scanning electron microscopy (SEM) thiab X-ray photoelectron spectroscopy (XPS), tau siv los tshuaj xyuas qhov chaw morphology thiab tshuaj lom neeg muaj pes tsawg leeg ntawm cov khoom kub ua ntej thiab tom qab leaching.

Kev Ntsuam Xyuas

Cov txiaj ntsig ntawm kev sim qhia tau hais tias qhov ntxiv cov hlau lead oxide ua rau muaj kev ua haujlwm ntawm kev rho tawm kub hauv cov tailings cyanide ntau ntxiv. Piv nrog rau pawg tswj hwm uas tsis muaj kev ntxiv hlau lead oxide, qhov nrawm ntawm kev rho tawm kub tau nce ntxiv los ntawm feem pua ​​​​​​zoo kawg nkaus. Piv txwv li, hauv qee qhov kev sim, qhov nrawm ntawm kev rho tawm kub tau nce ntxiv los ntawm tus nqi qis dua mus rau ntau dua [X]%. Tib lub sijhawm, kev siv Sodium Cyanide kuj tau txo qis rau qee qhov. Kev tshuaj xyuas SEM thiab XPS ntxiv tau lees paub tias hlau lead oxide tau cuam tshuam nrog zaj duab xis passivation ntawm qhov chaw kub, thiab cov tshuaj lom neeg tshiab tau tshwm sim ntawm qhov chaw ntawm cov khoom kub tom qab ntxiv hlau lead oxide, uas yog sib xws nrog cov txheej txheem tshuaj tiv thaiv.

Daim ntawv thov Prospect

Kev tshawb pom ntawm kev siv cov hlau lead oxide los txhim kho cov leaching ntawm kub hauv cyanide tailings muaj dav daim ntawv thov kev cia siab. Hauv kev lag luam mining, cov thev naus laus zis no tuaj yeem siv rau cov chaw kho mob cyanide tailings uas twb muaj lawm. Los ntawm tsuas yog ntxiv cov hmoov txhuas oxide rau cov txheej txheem leaching, tus nqi rov qab ntawm kub tuaj yeem txhim kho yam tsis muaj kev hloov kho khoom loj. Qhov no tsis yog tsuas yog nce kev lag luam tus nqi ntawm cov khoom siv tailings tab sis kuj txo cov kev cuam tshuam ib puag ncig los ntawm kev cia ntev ntev ntawm tailings uas muaj kub. Ntxiv mus, txoj kev no tseem tuaj yeem txuas ntxiv mus rau kev kho mob ntawm qee qhov refractory kub ore, muab cov kev daws teeb meem tshiab rau cov txiaj ntsig zoo ntawm cov peev txheej kub.

Hauv kev xaus, cov hlau lead oxide qhia tau hais tias muaj peev xwm zoo hauv kev txhim kho cov leaching ntawm kub hauv cyanide tailings. Los ntawm kev nkag siab tob txog nws txoj kev txhim kho thiab kev txhim kho txuas ntxiv ntawm kev sim cov xwm txheej, cov thev naus laus zis no yuav tsum ua lub luag haujlwm tseem ceeb hauv kev txhim kho yav tom ntej ntawm kev lag luam kub mining.