Optimization ntawm Sodium Cyanide Leaching hauv Kub-Copper Ores

Introduction

Kev rho kub thiab tooj liab los ntawm cov pob zeb kub-tooj ​​liab yog ib qho txheej txheem nyuaj. Cyanidation, tshwj xeeb tshaj yog siv Sodium Cyanide , tau ntev los ua ib txoj hauv kev tseem ceeb rau kev rho kub. Txawm li cas los xij, qhov muaj tooj liab nyob rau hauv cov pob zeb no ua rau muaj kev cov nyom loj rau cov txheej txheem cyanidation, cuam tshuam rau ob qho tib si rov qab kub thiab kev siv cyanide . Cov ntawv blog no delves rau hauv kev ua kom zoo dua ntawm sodium Cyanide Leaching hauv cov pob zeb kub-tooj ​​liab, tshawb nrhiav cov hauv paus ntsiab lus, cov teeb meem, thiab cov kev daws teeb meem tshiab.

Cov ntsiab lus ntawm Cyanide Leaching

Cyanide leaching cia siab rau lub peev xwm tshwj xeeb ntawm cyanide ions los tsim cov complexes ruaj khov nrog kub thiab nyiaj. Sodium cyanide, uas yog heev soluble nyob rau hauv dej thiab kuj ruaj khov, ua hauj lwm raws li cov thawj lixiviant. Thaum yaj hauv dej, nws tso tawm cyanide ions. Cov ions no hnov ​​​​mob nrog kub hauv qhov muaj cov pa oxygen los ntawm cov txheej txheem electrochemical. Kub yog thawj zaug oxidized thiab tom qab ntawd khi los ntawm cyanide ions los ua ib qho kev ua haujlwm soluble, tso cai rau nws rho tawm ntawm cov ore.

Cov kev sib tw ua los ntawm tooj liab hauv kub-Copper Ores

Kev siv Cyanide ntau ntxiv

Tooj nyob rau hauv kub-tooj ​​liab ores reacts nrog cyanide los tsim ntau yam tooj liab-cyanide complexes. Rau txhua 1% ntawm reactive tooj liab tam sim no, kwv yees li 30 kg / t ntawm NaCN tuaj yeem noj. Qhov kev noj qab haus huv no tsis yog tsuas yog ua rau cov nqi ua haujlwm ntawm cov txheej txheem cyanidation tab sis tseem yuav tsum tau ceev faj ntxiv txog kev siv cyanide.

Inhibition ntawm kub Leaching

High concentrations ntawm tooj liab-cyanide complexes nyob rau hauv lub leaching tov yuav decelerate lub dissolution ntawm kub. Tsis tas li ntawd, tooj liab muaj qhov nyiam ua cov txheej txheem passivation ntawm cov khoom kub. Cov khaubncaws sab nraud povtseg ua raws li kev thaiv, txo qhov kev sib cuag ntawm kub thiab cyanide ions thiab yog li cuam tshuam cov txheej txheem rho tawm.

Cov tswv yim rau Optimizing Sodium Cyanide Leaching hauv Kub-Copper Ores

Pretreatment ntawm Ores

• Cov Txheej Txheem Sib Cais Lub Cev : Cov txheej txheem xws li kev sib cais ntawm lub ntiajteb txawj nqus, kev ntab, lossis kev sib cais sib nqus tuaj yeem siv los ua kom cov hlau nplaum sib sau ua ntej. Los ntawm kev xaiv tshem tawm ib feem tseem ceeb ntawm cov zaub mov tooj liab ua ntej cyanidation, cov txheej txheem no txo ​​cov ntsiab lus tooj liab hauv cov khoom siv uas yuav raug leaching. Piv txwv li, kev ntab tuaj yeem sib cais cov zaub mov tooj liab sulfide ntawm cov hlau nplaum uas muaj kub, txo qis kev cuam tshuam tooj liab thaum lub sijhawm cyanidation.

• Kev Kho Mob Ua Ntej Oxidative : Cov txheej txheem oxidative xws li kev ci, bio-oxidation, lossis kev oxidation siab yog qhov zoo hauv kev rhuav tshem cov zaub mov sulfide thiab tso cov kub uas nyob hauv. Hauv cov ntsiab lus ntawm cov kub-tooj ​​liab sulfide ores, kev kho mob ua ntej oxidative tsis yog tsuas yog txhim kho kev rov qab kub xwb tab sis kuj txo qhov cuam tshuam tsis zoo ntawm tooj liab rau cyanidation. Piv txwv li, kev ci, hloov cov zaub mov sulfide mus rau hauv oxides, ua rau kub nkag tau yooj yim rau cov txheej txheem cyanide leaching.

Txheej txheem Parameter Optimization

• Kev Ntsuas Cyanide : Kev txiav txim siab qhov kev ntsuas cyanide zoo tshaj plaws yog qhov tseem ceeb. Txawm hais tias qhov kev ntsuas siab dua yuav ua rau kub yaj, lawv kuj ua rau siv cyanide ntau dhau, tshwj xeeb tshaj yog thaum muaj tooj liab. Yuav tsum muaj kev sib npaug, thiab qee zaum, kev siv cov cyanide qis dua nrog rau lwm yam khoom ntxiv tuaj yeem ua rau muaj txiaj ntsig zoo dua.

• Kev Tswj pH : Kev tswj kom muaj pH zoo (feem ntau nyob ib ncig ntawm 9 - 12) hauv cov tshuaj leaching yog qhov tseem ceeb rau cov txheej txheem cyanidation. Hauv kev leaching kub-tooj ​​liab ore, kev kho pH tuaj yeem pab tswj cov nqi yaj ntawm ob qho tib si tooj liab thiab kub. Kev txo qis me ntsis pH qee zaum tuaj yeem txhim kho kev leaching kub los ntawm kev tswj hwm kev leaching tooj liab.

• Kub thiab Kev Ntxhov Siab : Kev tsa qhov kub thiab txias tuaj yeem ua rau cov tshuaj cyanide leaching sai dua, tab sis nws muaj nws cov kev txwv. Kub dhau tuaj yeem ua rau cyanide volatility thiab ua kom nws cov oxidation sai dua rau hauv cov tshuaj uas tsis tshua muaj zog. Kev ntxhov siab txaus yog qhov tsim nyog los xyuas kom meej tias muaj kev sib cuag zoo ntawm cov khoom me me, cov kua cyanide, thiab cov pa oxygen. Txawm li cas los xij, kev ntxhov siab hnyav dhau tuaj yeem ua rau cov khoom siv hnav thiab tsim kua muag ntau dhau.

Kev siv cov tshuaj ntxiv

• Ammonia : Ntxiv ammonia rau hauv cov txheej txheem cyanidation tuaj yeem pab tswj hwm tooj liab los ntawm kev tsim cov khoom sib xyaw ruaj khov nrog nws. Cov khoom sib xyaw no tiv thaiv kev tsim cov tshuaj tooj liab-cyanide uas tiv thaiv kev yaj kub. Txawm li cas los xij, kev siv ammonia yuav tsum tau xav txog zoo vim nws muaj tshuaj lom thiab volatility, uas ua rau muaj kev pheej hmoo rau ib puag ncig.

• Glycine : Cov kev tshawb fawb tsis ntev los no qhia tau hais tias glycine siv tau ua ke nrog cov cyanide tsawg los rho kub, nyiaj, thiab tooj liab los ntawm cov pob zeb kub-tooj ​​liab. Glycine complexes nrog ob qho tib si cupric thiab cuprous ions, txhawb kev yaj tooj liab, thiab tuaj yeem yaj cov txheej passivation ntawm kub thiab tooj liab nto. Txoj hauv kev no tuaj yeem txo qis kev siv cyanide tsawg kawg 75%.

Case Kev tshawb fawb

Kev ua haujlwm Japanese Mining

Muaj ib lub lag luam me me hauv Nyiv Pooj teb uas tau ua haujlwm los ua kom tau kub ntau tshaj plaws los ntawm cov hlau uas muaj tooj liab ntau los ntawm kev siv cyanidation. Hauv lub voj voog cyanidation yav dhau los nrog 800 tons ntawm hmoov av (cov khoom seem kub), lawv tau rov qab tau 1.3 kilos ntawm 94% kub ntshiab tom qab elution. Txhawm rau txhim kho kev rov qab, lawv siv cov kua qaub kom nce pH thiab ammonia los pab tshem tawm tooj liab. Tsis tas li ntawd, lawv tau ua tooj liab elution los ntawm Carbon ua ntej kub elution thiab kho qhov voltage thiab amperage thaum lub sijhawm kub elution thiab electrodeposition. Cov kev ntsuas no tau pab ua kom kub rov qab tau ntau dua.

Australian Qeb Qeb Copper-Gold Ore

Ib qho Australian qib qis tooj liab-kub ore tau ua tiav siv "kev sib xyaw flotation-tooj ​​liab-sulfur cais-sulfur concentrate leaching rau kub" txheej txheem. Los ntawm kev ua kom zoo dua cov flotation reagents (siv kev sib xyaw ntawm butyl xanthate thiab ammonium dibutyl dithiophosphate ua cov khoom sau) thiab cov txheej txheem ntws (ntau theem ntawm roughing thiab scavenging nyob rau hauv ib lub voj voog kaw), lawv ua tiav cov tooj liab rov qab ntawm 82.46% thiab tag nrho cov nyiaj rov qab ntawm 91.87%.

xaus

Kev ua kom zoo tshaj plaws ntawm cov txheej txheem sodium cyanide leaching hauv cov hlau kub-tooj ​​liab yog qhov tseem ceeb rau kev txhim kho kev lag luam thiab kev ruaj khov ntawm ib puag ncig ntawm kev khawb kub. Los ntawm kev nkag siab txog cov teeb meem uas tooj liab ua thiab kev siv cov tswv yim xws li kev kho ua ntej, kev ua kom zoo dua ntawm cov txheej txheem, thiab kev siv cov khoom ntxiv, kev txhim kho tseem ceeb hauv kev rov qab kub thiab kev siv cyanide tuaj yeem ua tiav. Kev tshawb fawb yav tom ntej hauv thaj chaw no yuav tsom mus rau kev tsim cov txheej txheem ua haujlwm zoo dua thiab zoo rau ib puag ncig, txo qhov cuam tshuam ntawm kev ua cov hlau kub-tooj ​​liab rau ib puag ncig thaum ua kom muaj kev rho tawm cov peev txheej ntau tshaj plaws.