Kev Siv Kub Zoo Siv Sodium Cyanide: Carbon Slurry Txheej txheem cej luam

Cyanide kub extraction yog dav siv nyob rau hauv kub mines vim nws muaj zog adaptability rau ores, muaj peev xwm tsim kub nyob rau hauv lub site, thiab siab rov qab tus nqi. Txawm li cas los xij, vim muaj teeb meem kev tiv thaiv ib puag ncig, kev ntsuas tau raug coj los kho cov dej khib nyiab ua ntej thiab tom qab khaws cia kom ua tiav xoom paug, lossis siv tsawg-cyanide lossis cov neeg sawv cev leaching uas tsis muaj cyanide los tiv thaiv ib puag ncig hauv cheeb tsam. Tsab xov xwm no qhia txog kev ua haujlwm ntawm cyanide thiab carbon-hauv-pulp (CIP) kev rho kub, lub hom phiaj yog kom nkag siab txog cov ntsiab cai ntawm kev rho kub thaum tshem tawm cov pa phem thiab txav mus rau kev khawb av uas tsis ua rau ib puag ncig puas tsuaj.

Cyanide kub Extraction

Cov khoom lag luam muaj xws li cov ntsiab lus ntawm cyanide thiab oxygen, qhov kub thiab txias, qhov loj thiab cov duab ntawm cov khoom kub hauv cov ore, pulp ntom, cov ntsiab lus slurry, zaj duab xis saum npoo ntawm cov khoom kub, thiab lub sij hawm leaching.

Thaum cov cyanide concentration tsawg, solubility ntawm cov pa oxygen kuj siab, thiab tus nqi dissolution ntawm kub nyob ntawm cyanide concentration; Thaum cov cyanide concentration siab, tus nqi tawg ntawm kub tsuas yog txiav txim siab los ntawm cov pa oxygen, feem ntau yog li ntawm 0.03% mus rau 0.05%. Qee cov oxidants, leaching aids, los yog kev txhaj tshuaj oxygen ncaj qha feem ntau ntxiv rau kev txhim kho leaching efficiency. Hauv ib tsob ntoo carbon-in-pulp, hloov huab cua nrog cov pa roj nplua nuj (tshaj li 90% oxygen) hauv lub tank leaching nce tus nqi leaching los ntawm 0.89 feem pua. Hauv lwm cov nroj tsuag, ntxiv 0.1 kg / tuj ntawm 98% txhuas acetate rau thawj leaching tank ua rau txo qis hauv cov tailings kub qib ntawm 0.218 g / ton rau 0.209 g / ton. Lub dissolution tus nqi ntawm kub nyob rau hauv cyanide tov nce nrog kub, feem ntau khaws cia ntawm 10 ° C thiab 20 ° C; qis dua 1.34 ° C, kub crystallizes, uas yog vim li cas sab qaum teb cov nroj tsuag feem ntau siv blowtorches los thaw thaiv cov kav dej hauv lub caij ntuj no. Tshaj 34.7 ° C, kub ua kua, feem ntau tso roj. Txhawm rau kom ruaj khov thiab txo cov tshuaj poob, qhov tsim nyog ntawm alkali yog ntxiv los txhawb cov tshuaj tiv thaiv ntawm hydrolysis; no alkali yog hu ua tiv thaiv alkali.

Cov khoom kub zoo muaj thaj tsam loj loj, ua rau lawv yooj yim soluble hauv cyanide. Tsis tas li ntawd, flaky kub, me me spherical kub hais, thiab kub hais nrog sab hauv pores kuj yooj yim dua yaj. Qhov qis qis qis ua rau qis viscosity, tso cai rau cyanide ions thiab oxygen kom diffuse sai dua rau saum npoo ntawm cov khoom kub, ua rau kom tawg sai dua thiab ntau dua leaching tus nqi. Txawm li cas los xij, qhov qis dua tuaj yeem nce qhov ntim ntawm cov tawv nqaij, nce cov khoom siv thiab cov nqi reagent. Qhov kev siv hluav taws xob tsim nyog feem ntau yog 40%, tab sis thaum muaj cov av nkos cov ntsiab lus siab thiab cov khoom muaj nyob ntawm 50% mus rau 20%. Cov impurities tuaj yeem tsim ntau cov yeeb yaj kiab ntawm qhov chaw kub, cuam tshuam rau kub leaching. Associated minerals hnov ​​​​mob nrog oxygen, cyanide, thiab alkali, inhibiting kub extraction. Raws li lub sij hawm leaching nce, qhov leaching tus nqi txhim kho mus txog ib qho kev txwv, tom qab ntawd tus nqi txo vim qhov txo qis hauv qhov ntim thiab qhov loj ntawm kub, nce qhov kev ncua deb ntawm cyanide, yaj oxygen, thiab kub complexes, thaum impurities accumulates tsim teeb meem leaching films. Qhov "sticking" ntawm leaching tank agitator feem ntau yog vim muaj siab concentration, tsis tshua muaj fineness, thiab tsis txaus airflow, raws li zoo raws li cov qauv sib txawv ntawm lub qis impeller thiab lub tank hauv qab. Hauv ib lub rooj cob qhia cyanide, tom qab lub tank tau daig, yuav tsum tau muaj kev cuam tshuam los ntawm phau ntawv, siv cov phom dej siab, phom cua, thiab cov kav hlau ntev los tshem cov kav dej. Nws tau pom thaum kawg tias qhov sib txawv ntawm lub impeller qis thiab lub tank hauv qab yog plaub npaug ntawm cov pa loj, thiab ib zaug kho, qhov teeb meem tau daws.

Carbon-in-Pulp (CIP) Kub Extraction

Cov yam ntxwv ua haujlwm suav nrog Kev ua kom cov pa roj carbon adsorption, desorption thiab electrolysis, thiab carbon regeneration.

Ua ntej siv cov pa roj carbon activated, nws yuav tsum "sharpened thiab de-dusted" los ntawm kev sib tsoo ua ntej. Thaum yuav cov pa roj carbon monoxide, nws yog ib qho tseem ceeb kom ntseeg tau tias ob qho tib si adsorption muaj peev xwm thiab lub zog zoo heev, nrog rau qhov ntim ntawm 0.50 kg / L txog 0.55 kg / L. Qhov loj me me yuav tsum tsis sib xws, feem ntau ntawm 6 mesh mus rau 12 mesh lossis 6 mesh mus rau 16 mesh, thiab cov ntsiab lus tshauv thiab cov khoom tsis zoo yuav tsum tsis pub tshaj 3%. Hauv qee cov pa roj carbon pulp cog, cov ntsiab lus siab ntawm cov hmoov carbon ua rau tailing kua kub qib siab tshaj cov pa roj carbon monoxide ntau tshaj 16 zaug, ua rau kub poob, yuav tsum tau hloov tag nrho cov pa roj carbon. Qhov ceev ntawm carbon nyob rau hauv lub tank adsorption nce nyob rau hauv ib tug gradient; xav txog kev laus, nquag hloov cov pa roj carbon monoxide yog qhov zoo rau kev rov qab kub. Hauv ib tsob ntoo carbon pulp, lub voj voog hloov pauv cov pa roj carbon monoxide hloov pauv txhua txhua 3 hnub rau txhua hnub, ua rau 25% nce hauv kev tsim khoom.

Carbon poob thaum lub sij hawm dhau los kuj yuav ua rau kub poob, feem ntau tshwm sim los ntawm clogging ntawm cov pa roj carbon cais screen. Nws yog ib qho tsim nyog yuav tsum tau tshem tawm cov khib nyiab ua ntej tom qab cais tawm thiab cua daj cua dub. Cov pa roj carbon sib cais yuav tsum siv lub vijtsam kab rov tav cylindrical, thiab cov teeb meem tseem tuaj yeem daws tau los ntawm kev txo cov slurry concentration lossis kho cov pa roj carbon monoxide hauv qab thiab cov cua ntws hauv sab cua ntawm lub vijtsam sib cais. Qhov teeb meem tseem ceeb tshaj plaws yog carbon to los ntawm adsorption tailing tank; 40-mesh kev nyab xeeb kev tshuaj ntsuam ntawm tailings mixing tank plays lub luag haujlwm tseem ceeb "gatekeeper", thiab nws yuav tsum tau xyuas thiab tswj xyuas kom tsis tu ncua. Txhawm rau txo cov pa roj carbon monoxide, kev sib tw qis qis yog feem ntau siv.

Desorption thiab electrolysis yog ua nyob rau hauv ib tug daws ntawm 1% sodium hydroxide thiab Sodium cyanide nyob rau hauv lub siab ntawm 0.35 MPa rau 0.39 MPa, ua tiav desorption ntawm qhov kub thiab txias ntawm 135 ° C mus rau 160 ° C, uas yog siab tshaj lub boiling point ntawm cov tshuaj. Cov qib kub hauv cov pa roj carbon depleted qis dua 50 g / t, thiab tam sim no, tsis yog-cyanide desorption thiab electrolysis tau dav siv.

Rau cov pa roj carbon regeneration, 3% mus rau 5% dilute nitric acid los yog hydrochloric acid tov yog siv rau soaking rau 0.5 mus rau 1 teev (zoo tib yam siv rau hauv qab no), nrog rau phau ntawv sib sib zog nqus nplawm. Tom qab soaking, cov pa roj yog rinsed nrog dej kom tshem tawm cov kua qaub, ua raws li los ntawm soaking nyob rau hauv ib tug 1% sodium hydroxide tov rau neutralize ib tug ntxiv acid. Thaum kawg, cov pa roj carbon yog ntxuav nrog 2 mus rau 3 npaug ntawm cov dej uas txheeb ze rau lub txaj carbon.

Cyanide Concentration, Alkalinity, thiab Carbon Density

Tom qab ntsuas qhov concentration ntawm slurry, lim nws siv lub funnel nrog lim ntawv. Siv ib lub ntim (hauv milliliters) rau hauv lub khob ntim dej, ntxiv 3-5 tee ntawm methyl txiv kab ntxwv, thiab cov tshuaj yuav pom lub teeb daj. Titrate nrog cov txheej txheem nyiaj nitrate kom txog thaum cov xim liab tshwm; Qhov ntim ntawm cov nyiaj nitrate noj nyob rau hauv cov kua qaub titration raj qhia cov ntsiab lus cyanide, uas sib haum mus rau cyanide concentration. Qhov no tuaj yeem hloov kho los ntawm kev hloov pauv tus nqi ntws ntawm cov Sodium Cyanide daws. Hauv cov tshuaj no, ntxiv 1-2 tee ntawm phenolphthalein, uas yuav tig liab qab, thiab titrate nrog cov txheej txheem acetic acid tov kom txog thaum cov xim liab ploj. Qhov sib txawv ntawm cov theem meniscus ntawm cov kua qaub titration raj ua ntej thiab tom qab titration qhia qhov ntim ntawm acetic acid noj (hauv milliliters), uas sib haum rau cov ntsiab lus txiv qaub. Qee zaum, oxalic acid yog siv rau titration, tswj pH ntawm slurry kom nyob nruab nrab ntawm 10 thiab 12. Cov ntsiab lus calcium oxide nyob rau hauv slurry yog kwv yees li 0.01% mus rau 0.02%. Alkalinity kuj tuaj yeem hloov kho los ntawm kev hloov cov kua qaub ntxiv. Piv txwv li, nyob rau hauv ib tug disc-hom txiv qaub feeder, tus nqi yuav raug tswj los ntawm kev kho qhov chaw ntawm lub baffle.

Lub 1-liter cylindrical carbon lauj kaub, nrog ib tug kov ua los ntawm δ8 rebar, muaj ib tug kov ntev li ntawm 75% ntawm lub tank qhov tob. Sab saum toj ntawm tus kov yog txuas nrog ib nrab qhib lub hau ntawm lub lauj kaub nrog cov hlau zoo hlau lossis nylon hlua. Los ntawm zawm lossis loosening cov hlau lossis hlua, cov pa roj carbon slurry tuaj yeem nkag mus rau hauv lub lauj kaub. Tom qab tshem lub lauj kaub los ntawm lub tank, ncuav cov roj carbon slurry rau hauv cov qauv sieve, yaug nws kom huv si nrog dej huv, thiab tshem tawm cov tee dej ua ntej hnyav cov pa roj carbon ntau, uas muab cov pa roj carbon density rau qhov ntsuas no, qhia hauv grams ib liter. Cov qauv yog coj los ntawm sab sauv, nruab nrab, thiab qis ntawm lub tank, thiab qhov nruab nrab tus nqi yog coj los ntawm cov pa roj carbon density ntawm lub tank. Cov txheej txheem ntawm carbon extraction, txhaj tshuaj, unloading, thiab acid ntxuav tau tag nrho cov automated siv lub siab dej jetting. Yog li ntawd, kev hloov pauv ntawm cov pa roj carbon density nyob rau hauv lub tank adsorption tuaj yeem tswj tau los ntawm cov pa roj carbon monoxide thiab nqus cov pa roj carbon monoxide raws li kev tshawb pom.

Yog xav paub ntxiv txog kev tshaj lij? Tiv tauj peb!

Cov lus qhia sov: Yog tias koj xav paub ntau ntxiv, xws li cov lus hais, cov khoom, kev daws teeb meem, thiab lwm yam,