Cov tswv yim los txo cov kev siv Sodium Cyanide thaum tuav cov nqi rov qab

Hauv kev lag luam mining thiab hlau extraction, sodium cyanide tau ntev lawm ib tug tseem ceeb reagent rau extraction ntawm precious hlau xws li kub thiab nyiaj vim nws cov hauj lwm zoo ntawm dissolving cov hlau. Txawm li cas los xij, kev siv Sodium Cyanide ua rau muaj kev pheej hmoo loj ntawm ib puag ncig thiab kev nyab xeeb, suav nrog qhov muaj peev xwm rau cyanide leakage thiab kev puas tsuaj nws tuaj yeem ua rau ecosystems thiab tib neeg noj qab haus huv. Raws li kev tswj hwm ib puag ncig tau dhau los ua nruj zuj zus, yuav tsum tau txo qis Sodium cyanide kev siv yam tsis muaj kev txo nqi hlau rov qab. Qhov kev tshaj tawm blog no tshawb txog ntau lub tswv yim thiab thev naus laus zis uas tuaj yeem pab ua tiav qhov kev sib npaug zoo.

1. Txhim kho cov txheej txheem Leaching

cov txheej txheem leaching yog qhov twg sodium cyanide cuam tshuam nrog cov ore kom yaj cov phiaj hlau. Los ntawm optimizing tsis nyob rau hauv cov txheej txheem no, txo qhov tseem ceeb ntawm kev siv cyanide tuaj yeem ua tiav.

1.1 Fine-Tune pH thiab Oxygen Levels

Sodium cyanide ua haujlwm tau zoo tshaj plaws nyob rau hauv ib qho pH tshwj xeeb, feem ntau ntawm 10 thiab 11. Kev saib xyuas thiab tswj xyuas cov pH ntawm cov tshuaj leaching tuaj yeem txhim kho cov kev ua haujlwm ntawm cyanide. Tsis tas li ntawd, oxygen yog qhov tseem ceeb rau cov tshuaj tiv thaiv oxidation uas ua rau cov hlau tawg. Tsim nyog aeration, los ntawm txoj kev xws li siv cua compressors lossis oxygen txhaj tshuab, xyuas kom meej tias cov txheej txheem oxidation ua tau zoo. Los ntawm kev tswj hwm qhov sib npaug ntawm pH thiab oxygen, tsawg dua cyanide yuav tsum ua kom tiav tib theem ntawm cov hlau rho tawm.

1.2 Siv txoj kev kho ua ntej

Kev kho cov ore ua ntej tuaj yeem ua rau nws muaj peev xwm ntau dua rau cyanide leaching, txo cov cyanide tag nrho. Piv txwv li, roasting los yog bio-oxidation tuaj yeem rhuav tshem cov ntaub ntawv refractory hauv cov ore, nthuav tawm ntau lub hom phiaj hlau rau cov tshuaj cyanide. Kev kub siab oxidation yog lwm txoj kev kho mob ua ntej, uas tuaj yeem ua rau thaj tsam ntawm cov ore hais thiab txhim kho kev sib cuag ntawm cyanide thiab hlau, yog li txhim kho tus nqi rov qab thaum siv tsawg cyanide.

2. Innovate nrog Alternative Reagents thiab Additives

Tshawb nrhiav lwm cov tshuaj reagents thiab additives tuaj yeem muab cov khoom siv hloov pauv lossis tshuaj ntxiv rau sodium cyanide, txo nws txoj kev cia siab.

2.1 Siv Cyanide-Free Leaching Agents

Ntau cov tshuaj tua kab mob tsis muaj cyanide tau tshwm sim los ua lwm txoj hauv kev. Thiosulfate, piv txwv li, tau pom cov lus cog tseg hauv kev rho tawm kub. Nws muaj tshuaj lom tsawg dua li sodium cyanide thiab tuaj yeem ua tiav cov txiaj ntsig zoo sib xws hauv cov xwm txheej zoo. Thiosulfate leaching yog tshwj xeeb tshaj yog zoo nyob rau hauv ores uas muaj qib siab ntawm tooj liab lossis lwm yam cuam tshuam, uas tuaj yeem haus cyanide hauv cov txheej txheem ib txwm muaj. Lwm qhov kev xaiv yog thiourea, uas kuj muab ib qho kev phooj ywg ib puag ncig rau cov hlau rho tawm, tshwj xeeb tshaj yog thaum ua ke nrog cov oxidants haum.

2.2 Muab cov additives

Cov tshuaj ntxiv tuaj yeem txhim kho kev ua haujlwm ntawm sodium cyanide, tso cai rau txo kev siv. Txiv qaub, piv txwv li, feem ntau yog siv los kho cov pH ntawm cov tshuaj leaching thiab tiv thaiv kev tsim cov pa phem hydrogen cyanide. Tsis tas li ntawd, qee cov polymers thiab surfactants tuaj yeem txhim kho qhov tawg ntawm cyanide hauv cov ore slurry, ua kom muaj kev sib cuag ntawm cyanide thiab hlau. Cov tshuaj ntxiv no tuaj yeem pab txo qis cyanide noj txog li 20 - 30% thaum tswj cov nqi rov qab.

3. Txhim kho cov cuab yeej siv thiab kev saib xyuas

Kev txhim kho cov cuab yeej siv thiab siv cov cuab yeej saib xyuas qib siab kuj tuaj yeem pab txo qis kev siv sodium cyanide.

3.1 Txhim kho Leaching Reactors

Niaj hnub nimno leaching reactors, xws li agitated tank reactors nrog txhim khu kev sib xyaw mechanisms, tuaj yeem ua kom muaj kev sib faib ntau dua ntawm cyanide hauv cov ore slurry. Qhov no txhim kho kev ua haujlwm ntawm cov hlau tawg, ua kom siv cov cyanide tsawg dua. Nruam stirred-tank reactors (CSTRs) nrog optimized impeller designs yuav txhim khu kev hloov loj, txo lub sij hawm thiab tus nqi ntawm cyanide yuav tsum tau ua kom tiav hlau extraction.

3.2 Ua raws li lub sijhawm saib xyuas

Advanced sensors thiab kev saib xyuas cov tshuab tuaj yeem ntsuas qhov ntsuas tsis tu ncua xws li cyanide concentration, pH, thiab cov hlau tawg hauv cov txheej txheem leaching. Los ntawm muaj cov ntaub ntawv ntawm lub sijhawm tiag tiag, cov neeg ua haujlwm tuaj yeem hloov kho tam sim rau cov tshuaj cyanide, kom ntseeg tau tias tsuas yog siv tus nqi tsim nyog xwb. Cov tshuab tswj tsis siv neeg tuaj yeem ua ke nrog cov sensors no kom tswj tau qhov sib ntxiv ntawm cyanide, tiv thaiv kev siv ntau dhau thiab ua kom zoo dua cov nqi rov qab.

4. Txhim kho Ore tuav thiab npaj

kom ore tuav thiab kev npaj tuaj yeem muaj kev cuam tshuam loj rau kev siv cyanide thiab cov nqi rov qab.

4.1 Ore Sib Tsoo Optimization

Kev tswj qhov me me ntawm cov ore los ntawm kev sib tsoo zoo yog qhov tseem ceeb. Qhov loj me me me ua rau thaj chaw muaj rau cyanide kom hnov ​​​​mob nrog cov hlau, tab sis kev sib tsoo ntau dhau kuj tuaj yeem ua rau muaj kev noj tshuaj ntau ntxiv. Los ntawm kev nrhiav pom qhov zoo tshaj plaws particle loj faib los ntawm kev sim thiab cov txheej txheem simulations, tus nqi ntawm cyanide xav tau rau kev siv hlau zoo tuaj yeem raug txo kom tsawg thaum tuav cov nqi rov qab siab.

4.2 Ore Sorting Technologies

Kev siv ore sorting technologies, xws li X-ray fluorescence (XRF) sorting lossis optical sorting, tuaj yeem cais cov ore qib siab los ntawm cov ore qib qis ua ntej cov txheej txheem leaching. Qhov no tso cai rau lub hom phiaj leaching ntawm qhov tseem ceeb ntawm cov ore, txo tag nrho cov ntim ntawm cov khoom uas yuav tsum tau kho nrog cyanide thiab yog li txo cyanide noj.

Hauv kev xaus, txo qis kev siv sodium cyanide thaum tswj cov nqi rov qab yog qhov kev sib tw ntau yam uas yuav tsum muaj kev sib xyaw ua ke ntawm kev ua kom zoo dua qub, thev naus laus zis tshiab, thiab kev tswj xyuas kev ua haujlwm zoo. Los ntawm kev siv cov tswv yim uas tau teev tseg saum toj no, kev lag luam mining thiab hlau rho tawm tsis tuaj yeem tsuas yog txo lawv cov hneev taw ib puag ncig tab sis kuj tseem muaj peev xwm txo cov nqi ua haujlwm ntev. Raws li kev tshawb fawb txuas ntxiv mus, cov txheej txheem tshiab thiab muaj txiaj ntsig zoo yuav tshwm sim, ntxiv kev txhim kho kev ruaj khov ntawm cov txheej txheem hlau rho tawm.