Hais txog Kev Siv Sodium Cyanide ntau dhau hauv Gold Mine Leaching

Hauv kev lag luam khawb kub, cov txheej txheem cyanidation tseem yog lub hauv paus tseem ceeb rau kev rho tawm kub ntawm cov pob zeb. Txawm li cas los xij, qhov teeb meem ntawm kev siv Sodium cyanide ntau dhau thaum lub sijhawm khawb kub tsis yog tsuas yog ua rau cov nqi ua haujlwm nce siab xwb tab sis kuj tseem muaj kev pheej hmoo loj heev rau ib puag ncig thiab kev nyab xeeb. Cov ntawv blog no tshawb nrhiav txog cov hauv paus chiv keeb, cov txheej txheem nrhiav tau zoo, thiab cov kev daws teeb meem siv tau los daws qhov teeb meem no.

To taub lub hauv paus ua rau

1. Ore yam ntxwv

• Kev Tshawb Fawb Txog Mineralogy Uas Muaj Ntau Yam Sib Txawv : Cov pob zeb uas muaj ntau yam sib xyaw ua ke tuaj yeem ua rau siv cyanide ntau . Piv txwv li, cov pob zeb sulfide ua rau muaj kev sib xyaw nrog cyanide, ua rau muaj cov tshuaj thiocyanate. Arsenopyrite thiab pyrrhotite hauv cov pob zeb tuaj yeem siv cyanide los ntawm kev ua oxidation thiab complexation reactions, ua rau nws tsis xav tau cov txheej txheem rho tawm kub.

• Cov Carbon Muaj Ntau : Cov ores carbonaceous muaj cov organic matter uas nqus cov kub-cyanide complexes, ib qho phenomenon hu ua "preg-robbing." Qhov no yuam kom ntxiv ntau cyanide los them rau qhov poob ntawm kev rho tawm, ua rau muaj kev siv ntau dhau.

2. Cov yam ntxwv ua haujlwm

• Kev Sib Xyaws Tsis Txaus : Kev sib tov tsis txaus thaum lub sijhawm leaching ua rau kev sib cuag tsis zoo ntawm cov hlau thiab cov kua cyanide. Qhov no cuam tshuam kev yaj ntawm kub thiab ua rau cov neeg ua haujlwm ntxiv cyanide ntau dua hauv kev cia siab tias yuav txhim kho cov nqi rho tawm.

• Cov pH Tsis Zoo Tshaj Plaws : Cyanidation nyob ntawm pH heev, nrog rau qhov ntau thiab tsawg zoo tagnrho feem ntau ntawm 10.5 thiab 11.5. pH qis dua qhov ntau thiab tsawg no ua rau cyanide hloov mus ua roj hydrogen cyanide, txo nws cov khoom siv rau kev yaj kub. Ntawm qhov tod tes, pH siab dhau tuaj yeem ua rau cov tshuaj cyanide tsis ruaj khov, thiab kuj ua rau muaj kev siv ntau ntxiv.

3. Dej zoo

• Dej Tawv : Cov dej uas muaj cov calcium, magnesium, thiab lwm yam hlau ions ntau tuaj yeem ua rau muaj kev sib xyaw nrog cyanide, ua rau cov hlau cyanide uas tsis yaj tau. Cov kev sib xyaw no ua rau cov cyanide hauv cov tshuaj leaching ploj mus, ua rau yuav tsum ntxiv cyanide ntxiv.

• Cov Pa oxygen uas yaj : Txawm hais tias cov pa oxygen yog qhov tseem ceeb rau kev oxidation ntawm kub thaum lub sijhawm cyanidation, cov pa oxygen ntau dhau tuaj yeem ua rau kev oxidation ntawm cyanide nws tus kheej sai dua, ua rau nws puas tsuaj sai thiab siv ntau dua.

Kev Tshawb Nrhiav

1. Kev kuaj tsis tu ncua thiab tshuaj xyuas

Sau cov qauv ntawm cov tshuaj leaching ntawm ntau theem ntawm cov txheej txheem, suav nrog cov khoom noj, nruab nrab, thiab cov ntsiab lus tawm. Tshawb xyuas cov qauv no rau cyanide concentration siv txoj hauv kev xws li titration, ion chromatography, lossis colorimetric assay. Sib piv cov ntsuas cyanide nrog cov txiaj ntsig theoretical tuaj yeem pab txheeb xyuas cov qauv kev noj haus tsis zoo.

2. Kev soj ntsuam cov txheej txheem tsis

Txuas ntxiv saib xyuas cov haujlwm tseem ceeb xws li pH, qhov kub thiab txias, nrawm nrawm, thiab cov ntsiab lus oxygen. Kev sib txawv ntawm qhov kev pom zoo tuaj yeem qhia txog cov teeb meem muaj peev xwm ua rau muaj kev noj ntau dhau ntawm cyanide. Siv cov kev tswj xyuas tsis siv neeg uas tuaj yeem ua rau muaj kev ceeb toom thaum tsis muaj kev cuam tshuam los ntawm cov kev txwv.

3. Ore Characterization

Ua cov ncauj lus kom ntxaws mineralogical thiab tshuaj ntsuam xyuas ntawm cov khoom ore tuaj. X-ray diffraction (XRD), scanning electron microscopy (SEM), thiab atomic absorption spectroscopy (AAS) tuaj yeem muab kev nkag siab rau cov ore muaj pes tsawg leeg, pab kwv yees siv cyanide thiab kho cov txheej txheem leaching raws li.

Cov kev daws teeb meem zoo

1. Ore Pretreatment

• Kev Kho Mob Ua Ntej Oxidative : Rau cov ores uas muaj cov zaub mov sulfide, cov txheej txheem kho mob ua ntej oxidative xws li roasting, pressure oxidation, lossis bio-oxidation tuaj yeem siv tau. Cov txheej txheem no rhuav tshem cov zaub mov sulfide, txo lawv cov tshuaj tiv thaiv nrog cyanide thiab txhim kho kev ua haujlwm ntawm kev rho tawm kub thaum txo qis kev siv cyanide.

• Kev Tshem Tawm Cov Pa roj Carbon : Hauv cov ores uas muaj cov pa roj carbon ntau , kev siv cov pa roj carbon activated lossis lwm yam tshuaj uas tshem cov pa roj carbon ua ntej yuav pab tshem tawm cov teebmeem preg-robbing. Qhov no tso cai rau cyanide tsom mus rau kev yaj kub es tsis txhob raug cov pa roj carbon noj.

2. Txheej txheem optimization

• Kev Hloov Pauv thiab Kev Kho Kom Muaj Pa : Xyuas kom meej tias kev hloov pauv thiab kev ua pa kom zoo kom txhawb kev sib xyaw sib npaug thiab kev hloov pauv oxygen zoo tshaj plaws. Ua qhov kev sim ua ntej kom txiav txim siab qhov ceev ntawm kev hloov pauv thiab kev ua pa zoo tshaj plaws rau ntau hom ore thiab cov xwm txheej leaching.

• Kev Tswj pH : Nruab cov tshuab tswj pH uas tuaj yeem kho qhov pH ntawm cov kua leaching kom raug. Siv cov txiv qaub ntsuab lossis sodium hydroxide los tswj cov pH kom zoo tshaj plaws, tiv thaiv kev puas tsuaj ntawm cyanide thiab xyuas kom meej tias kub yaj tau zoo.

3. Kev Kho Mob Dej

• Ua Kom Mos : Kho cov dej ua haujlwm kom tshem tawm cov ions ua rau tawv. Cov tshuaj pauv ion lossis cov kua qaub ua kom mos siv tau los ua kom cov calcium thiab magnesium ions los ua kom cov dej sib xyaw ua ke, txo lawv cov kev cuam tshuam nrog cov kua cyanide.

• Kev Tswj Xyuas Pa oxygen : Ua kom zoo tshaj plaws rau kev muab pa oxygen rau cov txheej txheem leaching. Siv cov sensors pa oxygen los saib xyuas thiab tswj cov pa oxygen uas yaj hauv dej, xyuas kom meej tias nws txaus rau kev oxidation kub tab sis tsis ntau dhau los ua rau cyanide puas tsuaj.

4. Reagent Management

• Cov Khoom Siv Hloov Cyanide : Tshawb nrhiav kev siv lwm cov tshuaj reagents xws li thiosulfate, thiourea, lossis cov tshuaj chloride. Cov khoom siv hloov no yuav muaj kev cuam tshuam tsawg dua rau ib puag ncig thiab muaj peev xwm siv tsawg dua piv rau Sodium Cyanide , tshwj xeeb tshaj yog rau qee hom ore.

• Kev Siv Cov Tshuaj Reagent Rov Qab : Siv cov txheej txheem rov qab thiab rov ua dua cyanide. Cov thev naus laus zis xws li kev pauv ion, electrowinning, thiab membrane filtration tuaj yeem siv los rov qab thiab siv cyanide dua los ntawm cov tailings leaching, txo qhov kev siv tag nrho thiab kev tsim cov khib nyiab.

Kev Tiv Thaiv Cov Tiv Thaiv

1. Kev cob qhia neeg ua haujlwm

Muab kev cob qhia zoo rau cov neeg ua haujlwm mining thiab ua cov neeg ua haujlwm ntawm cov txheej txheem cyanidation, cov khoom siv ua haujlwm, thiab kev saib xyuas. Cov neeg ua haujlwm tau txais kev cob qhia zoo muaj feem ntau los txheeb xyuas thiab daws cov teeb meem tam sim ntawd, ua kom cov txheej txheem leaching ua haujlwm tau zoo thiab ua tau zoo.

2. Cov ntaub ntawv tsom xam thiab qauv

Siv cov cuab yeej tshuaj ntsuam xyuas cov ntaub ntawv thiab cov txheej txheem qauv tsim los txheeb xyuas cov ntaub ntawv keeb kwm thiab lub sijhawm tiag tiag. Los ntawm kev txheeb xyuas cov xwm txheej thiab kev sib raug zoo, cov neeg ua haujlwm tuaj yeem kwv yees cov teeb meem muaj feem cuam tshuam txog kev siv cyanide thiab siv cov kev ntsuas kom tiv thaiv lawv.

3. Kev Tshawb Fawb thiab Kev Tshuaj Xyuas Tsis tu ncua

Ua tsis tu ncua kev soj ntsuam sab hauv thiab sab nraud ntawm cov txheej txheem cyanidation. Cov kev tshuaj xyuas no tuaj yeem pab txheeb xyuas thaj chaw rau kev txhim kho, xyuas kom muaj kev ua raws li cov cai ntawm ib puag ncig thiab kev nyab xeeb, thiab tswj kom muaj txiaj ntsig tag nrho ntawm kev ua haujlwm kub leaching.

Xaus lus, kev daws teeb meem kev siv sodium cyanide ntau dhau hauv kev ntxuav kub yuav tsum muaj ntau txoj hauv kev uas suav nrog kev nkag siab txog cov hauv paus chiv keeb, siv cov txheej txheem tshawb pom zoo, siv cov kev daws teeb meem tsim nyog, thiab siv cov kev ntsuas tiv thaiv. Los ntawm kev ua li ntawd, cov tuam txhab khawb av tsis yog tsuas yog txo cov nqi xwb tab sis kuj txhim kho kev ruaj khov ntawm lawv cov haujlwm rho kub.