Lub luag haujlwm ntawm Sodium Cyanide thiab Tiv Thaiv Alkali hauv Cyanidation Leaching Process

Introduction

Kev siv tshuaj cyanidation leaching yog ib txoj kev siv dav hauv kev lag luam mining los rho kub thiab nyiaj ntawm cov hlau. Hauv txoj kev no, Sodium cyanide thiab Protective alkali ua lub luag haujlwm tseem ceeb. Kev nkag siab txog lawv cov haujlwm yog qhov tseem ceeb rau kev ua kom zoo dua ntawm cov txheej txheem cyanidation, txhim kho cov nqi rov qab tau hlau, thiab txo cov nqi ua haujlwm.

Lub luag haujlwm ntawm Sodium Cyanide

Dissolving kub thiab nyiaj

Sodium cyanide (NaCN) ua haujlwm ua tus neeg sawv cev tseem ceeb hauv cov txheej txheem cyanidation. Nws lub luag haujlwm tseem ceeb yog yaj kub thiab nyiaj hauv cov hlau, ua rau muaj cov hlau cyanide sib xyaw ua ke. Thaum muaj oxygen thiab dej, Sodium Cyanide ua rau kub thiab nyiaj. Qhov kev ua no hloov cov hlau mus ua cov tshuaj uas yooj yim yaj hauv cov kua dej, uas yog qhov tseem ceeb rau cov txheej txheem Cyanidation leaching.

Muaj feem cuam tshuam rau Leaching Rate

Qhov concentration ntawm sodium cyanide hauv cov tshuaj leaching cuam tshuam rau qhov leaching rate ntawm kub thiab nyiaj. Feem ntau, nyob rau hauv ib qho ntau yam, qhov nce ntawm sodium cyanide concentration ua rau qhov leaching rate sai dua. Ntau cyanide ions txhais tau tias ntau reactants muaj rau cov tshuaj tiv thaiv dissolving, yog li txhawb kev tsim cov hlau cyanide complexes. Txawm li cas los xij, cov sodium cyanide concentration siab dhau ua rau cov nqi nce ntxiv thiab muaj kev phom sij rau ib puag ncig. Tsis tas li ntawd, ntau cyanide tuaj yeem ua rau muaj kev cuam tshuam nrog lwm cov khoom hauv cov ore, xws li qee cov hlau sulfides. Cov tshuaj tiv thaiv no siv cyanide, txo nws cov txiaj ntsig rau kev yaj kub thiab nyiaj.

Reacting nrog Lwm Cov Cheebtsam hauv Ore

Ore muaj ntau yam impurities thiab Cheebtsam ntxiv rau kub thiab nyiaj, thiab sodium cyanide tuaj yeem cuam tshuam nrog cov tshuaj no, cuam tshuam rau cov txheej txheem cyanidation. Piv txwv li, tooj liab minerals nyob rau hauv lub ore teb nrog sodium cyanide los tsim tooj liab cyanide complexes, siv cyanide nyob rau hauv tus txheej txheem. Cov tshuaj tiv thaiv nrog cov khoom siv tooj liab sib txawv ntawm tus nqi thiab cov khoom. Qee cov khoom siv tooj liab sulfide, xws li chalcopyrite, hnov ​​​​mob nrog cyanide nyob rau hauv lub xub ntiag ntawm oxygen, ua tooj liab cyanide thiab sulfur - muaj los ntawm - cov khoom. Qhov no tsis yog tsuas yog txo qis ntawm cyanide muaj rau yaj kub thiab nyiaj tab sis kuj tseem tuaj yeem tsim cov tshuaj uas cuam tshuam rau cov txheej txheem hlau rov qab.

Lub luag haujlwm ntawm Kev Tiv Thaiv Alkali

Ua kom ruaj ntseg ntawm Cyanide tov

Ib qho ntawm cov haujlwm tseem ceeb ntawm kev tiv thaiv alkali yog kom muaj kev ruaj ntseg ntawm cov tshuaj cyanide. Cyanide ions nyob rau hauv kev daws yog nquag hydrolysis, tshwj xeeb tshaj yog nyob rau hauv acidic ib puag ncig. Thaum lub sij hawm hydrolysis, cyanide ions tuaj yeem tsim hydrogen cyanide, cov pa roj uas muaj kuab lom thiab tsis muaj zog. Qhov no tsis tsuas yog ua rau poob ntawm cyanide tab sis kuj ua rau muaj kev hem thawj loj rau ib puag ncig thiab tib neeg kev noj qab haus huv. Kev tiv thaiv alkalis, xws li calcium hydroxide (txiv qaub), sodium hydroxide, los yog potassium hydroxide, nce pH tus nqi ntawm cov tshuaj. Los ntawm kev nce cov pH, lawv hloov cov tshuaj sib npaug hauv ib txoj hauv kev uas txo cov hydrolysis ntawm cyanide, ua kom cov txheej txheem cyanidation ua tau zoo thiab txo qis cyanide noj vim hydrolysis.

Txo qhov cuam tshuam ntawm cov ntxhia puas tsuaj

Ore tej zaum yuav muaj cov zaub mov uas cuam tshuam rau cov txheej txheem cyanidation, zoo li pyrrhotite. Cov zaub mov no hnov ​​​​mob nrog cyanide thiab oxygen, noj cov khoom tseem ceeb no thiab cuam tshuam nrog kev tawg ntawm kub thiab nyiaj. Thaum tiv thaiv alkali ntxiv thaum lub sij hawm ore sib tsoo cov txheej txheem, nws muaj peev xwm oxidize cov teeb meem minerals los yog ua rau lawv tsim precipitates, zoo tshem tawm lawv. Piv txwv li, nyob rau hauv lub xub ntiag ntawm txiv qaub, pyrrhotite tuaj yeem oxidized, ua rau tsim cov hlau hydroxide precipitates thiab sulfur - muaj cov ntsiab lus. Cov txheej txheem no txo ​​qis qhov cuam tshuam tsis zoo ntawm cov zaub mov tsis zoo ntawm cyanidation, txhim kho cov kev ua haujlwm ntawm cov kub thiab nyiaj.

Kho tus nqi pH ntawm lub pulp

Tus nqi pH ntawm lub pulp thaum lub sij hawm cyanidation txheej txheem yog ib qho tseem ceeb parameter, thiab kev tiv thaiv alkali yog siv los kho nws mus rau qhov zoo tshaj plaws ntau yam. Rau feem ntau cov txheej txheem cyanidation, pH ntawm 9 thiab 12 feem ntau yog qhov zoo tagnrho. Nyob rau hauv qhov ntau, cov tshuaj cyanide tseem nyob ruaj khov, thiab kev sib cais ntawm kub thiab nyiaj ua haujlwm zoo. Yog tias pH tsawg dhau lawm, cyanide hydrolysis ua qhov tseem ceeb, txo qis tus nqi leaching ntawm kub thiab nyiaj. Hloov pauv, pH uas siab dhau tuaj yeem cuam tshuam tsis zoo rau lub ntsej muag ntawm cov ore hais thiab cov tshuaj tiv thaiv kinetics ntawm kub thiab nyiaj soluble. Ntau hom kev tiv thaiv alkalis tuaj yeem raug xaiv raws li cov yam ntxwv tshwj xeeb ntawm cov ore. Txiv qaub feem ntau siv vim nws cov nqi qis thiab kev ua haujlwm zoo hauv feem ntau cov xwm txheej. Thaum siv cov txiv qaub raws li kev tiv thaiv alkali, nws feem ntau ntxiv rau hauv daim ntawv ntawm txiv qaub kua txiv kom tswj tau qhov sib ntxiv thiab cov txheej txheem tshuaj tiv thaiv zoo dua.

Kev sib cuam tshuam ntawm Sodium Cyanide thiab Protective Alkali

Kev ua haujlwm ntawm sodium cyanide thiab tiv thaiv alkali yog sib cuam tshuam zoo hauv cov txheej txheem cyanidation leaching. Kev tiv thaiv alkali ua kom muaj kev ruaj ntseg ntawm cov tshuaj sodium cyanide, ua kom nws ua kom zoo yaj kub thiab nyiaj. Nyob rau tib lub sijhawm, muaj sodium cyanide hauv kev daws teeb meem cuam tshuam rau kev tiv thaiv alkali. Cov tshuaj tiv thaiv cov khoom ntawm sodium cyanide nrog rau lwm cov ore Cheebtsam tuaj yeem hloov cov tshuaj pH, thiab kev tiv thaiv alkali yuav tsum tsis tu ncua kho cov pH kom tswj tau qhov zoo ntawm cyanidation. Qhov tsim nyog piv ntawm sodium cyanide thiab tiv thaiv alkali yog qhov tseem ceeb. Kev tiv thaiv alkali ntau dhau tuaj yeem ua rau muaj alkalinity siab dhau, ua rau tsis zoo rau cov tshuaj tiv thaiv cyanidation. Kev tiv thaiv tsis txaus alkali, ntawm qhov tod tes, tsis tuaj yeem lav qhov ruaj khov ntawm cov tshuaj cyanide, ua rau muaj kev siv tshuaj cyanide ntau ntxiv thiab txo cov leaching efficiency. Yog li ntawd, nyob rau hauv cov txheej txheem cyanidation tiag tiag, nws yog ib qho tsim nyog yuav tsum ua tib zoo tswj cov tshuaj sodium cyanide thiab tiv thaiv alkali raws li cov yam ntxwv ntawm cov ore thiab cov txheej txheem yuav tsum ua kom tiav cov txiaj ntsig zoo tshaj plaws.

xaus

Hauv cov txheej txheem cyanidation leaching, sodium cyanide thiab tiv thaiv alkali yog ob qho tib si tseem ceeb. Sodium cyanide yog lub luag haujlwm rau kev tawg kub thiab nyiaj, thaum kev tiv thaiv alkali ua lub luag haujlwm tseem ceeb hauv kev tswj kev ruaj ntseg ntawm cov tshuaj cyanide, txo qhov cuam tshuam ntawm cov zaub mov tsis zoo, thiab kho cov pH nqi ntawm cov tawv nqaij. Kev siv kom zoo thiab sib npaug ntawm ob cov tshuaj no yog qhov tseem ceeb rau kev ua kom zoo ntawm cov txheej txheem cyanidation, txhim kho tus nqi rov qab los ntawm kub thiab nyiaj, thiab txo cov nqi tsim khoom. Cov neeg ua haujlwm hauv mining yuav tsum ua tib zoo kawm cov yam ntxwv ntawm cov ore thiab ua qhov kev ntsuam xyuas tsim nyog los txiav txim siab qhov zoo tshaj plaws thiab kev ua haujlwm ntawm sodium cyanide thiab tiv thaiv alkali kom ntseeg tau tias kev ua haujlwm zoo thiab ruaj khov ntawm cyanidation leaching txheej txheem.