Kev siv thiab qhov tseem ceeb ntawm Sodium Cyanide hauv Mineral Processing

sodium cyanide, ib qho inorganic compound, plays lub luag haujlwm tseem ceeb hauv cov txheej txheem cyanidation hauv kev lag luam kub mining. Nws daim ntawv thov yog ntau haiv neeg thiab tseem ceeb heev nyob rau hauv extraction ntawm precious hlau los ntawm ore.

Gold Ore Leaching

Ib qho ntawm cov kev siv tseem ceeb ntawm Sodium cyanide yog nyob rau hauv lub leaching ntawm kub ores. Hauv cov txheej txheem no, cov ore kub, tom qab tau crushed thiab hauv av rau hauv cov khoom zoo, raug coj mus rau hauv kev sib cuag nrog cov tshuaj aqueous uas muaj. Sodium Cyanide. Ib qho tshuaj tiv thaiv tshwm sim ntawm sodium cyanide thiab cov kub nyob rau hauv cov ore, uas ua rau tsim ntawm kub cyanide ions, uas yog ces yaj nyob rau hauv cov tshuaj. Cov txheej txheem no, hu ua Cyanide leaching, yog ib qho tseem ceeb thiab tseem ceeb kauj ruam hauv kev txais txiaj ntsig kub ore. Cov tshuaj sib npaug rau cov tshuaj tiv thaiv ntawm kub, oxygen, thiab sodium cyanide hauv cov tshuaj aqueous tuaj yeem ua kom yooj yim xws li: 4Au + 8NaCN + O₂ + 2H₂O → 4Na[Au(CN)₂] + 4NaOH. Cov tshuaj tiv thaiv no tso cai rau cov kub, uas feem ntau tam sim no nyob rau hauv qis concentrations nyob rau hauv lub ore, kom zoo yaj thiab sib cais los ntawm lwm yam minerals.

Kub Extraction

Ua raws li cov txheej txheem cyanide leaching, cov tshuaj uas muaj cov kub yaj yog sau thiab raug rau kev kho mob ntxiv kom precipitate kub. Sodium cyanide ua hauj lwm raws li ib tug precipitant nyob rau theem no. Nws reacts nrog kub chloride ions nyob rau hauv cov tshuaj los tsim kub cyanide complexes. Tom qab ntawd, ntau txoj hauv kev tau ua haujlwm los rho cov kub los ntawm cov complexes. Ib txoj hauv kev zoo tshaj plaws yog siv cov hmoov av zinc lossis lwm cov tshuaj txo qis. Zinc displaces cov kub los ntawm kub cyanide complex, ua rau nag lossis daus ntawm hlau kub. Cov tshuaj tiv thaiv tuaj yeem sawv cev raws li: 2Na[Au(CN)₂] + Zn → 2Au + Na₂[Zn(CN)₄]. Cov txheej txheem no ua rau kom rov zoo ntawm cov kub-purity kub los ntawm cov kua qaub.

Leaching ntawm Lwm Cov Hlau Ores

Tshaj kub, sodium cyanide kuj pom daim ntawv thov nyob rau hauv leaching ntawm lwm cov hlau ore. Piv txwv li, nyob rau hauv cov ntaub ntawv ntawm silver ores, tom qab cyanide leaching, sodium cyanide yuav siv tau raws li ib tug extraction neeg sawv cev los precipitate nyiaj los ntawm cov tshuaj. Zoo ib yam li cov Kub extraction txheej txheem, nyiaj cov ntaub ntawv cyanide complexes nyob rau hauv lub xub ntiag ntawm sodium cyanide. Cov tshuaj tiv thaiv ntawm cov nyiaj, sodium cyanide, thiab cov pa oxygen hauv cov kua dej zoo ib yam li cov kub: 4Ag + 8NaCN + O₂ + 2H₂O → 4Na[Ag(CN)₂] + 4NaOH. Cov nyiaj cyanide complexes tuaj yeem ua tiav ntxiv kom tau txais cov nyiaj hlau.

Hauv kev xaus, sodium cyanide yog ib qho tshuaj tsis tseem ceeb hauv cov tshuaj Mineral ua kev lag luam, tshwj xeeb tshaj yog nyob rau hauv extraction ntawm precious hlau xws li kub thiab nyiaj. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias vim nws qhov xwm txheej muaj kuab lom, nruj kev nyab xeeb thiab kev tiv thaiv ib puag ncig yuav tsum tau ua thaum nws siv hauv kev ua haujlwm tsuas yog los tiv thaiv kev puas tsuaj rau tib neeg kev noj qab haus huv thiab ib puag ncig.