Kub Extraction: Cov kauj ruam ntawm Ore rau Ingot hauv Carbon Leaching

Cov pa roj carbon activated tau ntxiv rau hauv lub tank leaching, ua kom muaj qhov tshwm sim ib txhij ntawm leaching thiab adsorption, uas yog leaching thaum adsorbing, uas yog hu ua carbon-in-leach method (CIL). Tsim los ntawm txoj kev carbon-in-pulp, nws muaj qhov zoo ntawm kev txo cov leaching tso tsheb hlau luam thiab txo cov txheej txheem ntws. Yog li ntawd, nws tuaj yeem txo cov peev txheej tsim kho thiab cov nqi tsim khoom. Leaching thiab adsorbing ib txhij txhim kho lub dissolution kinetics tej yam kev mob ntawm kub, faCILitating lub leaching thiab adsorption ntawm kub. Txoj kev carbon-in-leach feem ntau suav nrog kev ua haujlwm xws li Kev npaj ntawm Leaching Raw Materials, Stirred Leaching thiab countercurrent carbon adsorption, desorption ntawm kub-loaded carbon, Electrowinning thiab Electrolysissmelting thiab ingot ua, thiab carbon regeneration.

01 Kev Npaj Leaching Raw Materials

Thaum cov txheej txheem carbon-in-leach kub extraction yog saws, kev npaj ntawm leaching raw cov ntaub ntawv muaj xws li lub cev crushing thiab sib tsoo kev faib. Feem ntau, nyob rau hauv cov txheej txheem carbon-in-leach kub extraction, lub fineness ntawm cov dej ntws los ntawm kev sib tsoo kev faib yog feem ntau xws li 85 - 95% dhau los ntawm -200 mesh.

02 Kev tshem tawm cov khib nyiab

Ntoo chips thiab sundries nyob rau hauv lub pulp yog yuav ua rau blockages nyob rau hauv pipelines thiab cov ntxaij vab tshaus. Ntxiv mus, lawv nyiam adsorb kub nyob rau hauv lub pulp thiab sib tov rau hauv cov nplua nuj carbon. Yog li ntawd, lawv yuav tsum tau muab tshem tawm ua ntej leaching. Yog tias tsim nyog, pulp thickening thiab ntxiv cov nplai inhibitors yog xav tau. Tus nplai inhibitor tseem tuaj yeem txo qhov ntsuas ntawm qhov chaw ntawm cov pa roj carbon activated thiab lub vijtsam. Feem ntau, ob qhov kev tshem tawm cov khib nyiab yog teem rau hauv cov txheej txheem sib tsoo, feem ntawm kev sib tsoo ntawm thawj - thiab thib ob - theem sib tsoo. Cov khoom siv tshem tawm cov khib nyiab feem ntau yog siv nruab nrab - zaus linear vibrating cov ntxaij vab tshaus. Hauv thawj qhov kev tshem tawm cov khib nyiab, cov ntxaij vab tshaus thiab cov cylindrical tuaj yeem siv tau. Lub qhov screen qhov loj ntawm cov khib nyiab tshem tawm lub vijtsam yuav tsum yog me me li sai tau thaum ua kom tsis muaj dej ntws tawm ntawm qhov screen.

03 Pre-leaching Thickening Operation

Thaum cov dej ntws tawm ntawm kev sib tsoo feem ntau yog 18 - 22%, nws tsis haum rau leaching ncaj qha, thiab pulp thickening yuav tsum tau nqa tawm. Nws raug nquahu kom siv lub siab-efficiency thickener nrog me me hneev taw thiab siab thickening efficiency.

04 Stirred Leaching thiab Countercurrent Carbon Adsorption

Cov txheej txheem carbon-in-leach yog tus cwj pwm los ntawm kev ua tiav ntawm cov kub leaching thiab adsorption ua haujlwm. Tus naj npawb ntawm cov theem leaching feem ntau yog 6 - 10 (cov lus qhia tshwj xeeb thiab qhov ntau ntawm cov leaching tso tsheb hlau luam raug txiav txim siab raws li kev ua tau zoo ntawm lub tshuab ua haujlwm). Txij li thaum Sodium Cyanide yog tshiab ntxiv rau Tank No.1. tus nqi ntawm kub leached yog me me. Yog li, feem ntau cov pa roj carbon-in-leach nroj tsuag siv Tank No.1 ua lub tank ua ntej leaching, thiab cov tso tsheb hlau luam tom ntej ua cov leaching thiab adsorption tanks. Txhua lub leaching thiab adsorption tank yog nruab nrog cov pa roj carbon - cais cov tshuaj ntsuam kom cais cov pa roj carbon thiab pulp. Lub pulp ntws mus rau pem hauv ntej, thiab cov activated carbon ntws rov qab, uas yog, lub pulp thiab activated carbon yog nyob rau hauv countercurrent adsorption. Cov pa roj carbon activated tshiab yog ntxiv los ntawm qhov kawg leaching thiab adsorption tank, thiab kub - loaded carbon yog tawm los ntawm thawj leaching thiab adsorption tank. Cov pa roj carbon activated ua kub - loaded carbon los ntawm adsorbing kub nyob rau hauv lub pulp. Tom qab cov adsorption tiav lawm, lub pulp uas muaj kub - loaded carbon yog pub rau cov pa roj carbon - rho tawm screen los ntawm ib tug huab cua nqa. Cov pa roj carbon - rho tawm cov tshuaj ntsuam cais cov activated carbon thiab cov pulp. Tom qab kuaj xyuas thiab yaug, nws raug xa mus rau kev ua haujlwm desorption thiab electrowinning. Tom qab adsorption los ntawm txoj kev no, qib kub ntawm cov kua pulp feem ntau yog 0.01 - 0.03g / m³. Feem ntau, feem ntau siv cov pa roj carbon activated feem ntau yog cov txiv maj phaub - plhaub activated carbon, uas muaj cov kab noj hniav me me, kev ua haujlwm siab, hnav tsis kam, thiab rov ua dua tshiab. Nws muaj kev ua haujlwm zoo adsorption thiab abrasion - lub zog tsis kam, tuaj yeem nce tus nqi adsorption los ntawm 30%, zoo heev txhim kho tus nqi rov qab ntawm cov kub hauv cov hlau sib txuas, thiab txhim kho cov txiaj ntsig kev lag luam thiab kev tsim khoom.

05 Desorption ntawm Kub - loaded Carbon, Electrowinning thiab Electrolysis

Cov kub - loaded carbon thiab pulp yog nqa mus rau cov pa roj carbon - sib cais screen (feem ntau yog ib tug linear vibrating screen) los ntawm ib tug carbon - extracting twj tso kua mis los yog ib tug huab cua nqa. Lawv tau yaug nrog dej huv ntawm qhov screen kom cais cov pa roj carbon thiab cov pulp. Cov kub - loaded carbon nkag mus rau hauv cov pa roj carbon - cia tank, thiab lub pulp thiab yaug dej nkag mus rau thawj - theem adsorption tank. Muaj ntau ntau txoj kev desorption rau kub - loaded carbon. Tam sim no, txoj kev kub kub thiab kub siab desorption feem ntau yog siv. Ntawd yog, ib qho anion uas yooj yim adsorbed los ntawm cov pa roj carbon activated yog ntxiv rau lub desorption system kom tshem tawm Au(CN)₂⁻ thiab ua tiav cov desorption ntawm kub. Cov kua muaj txiaj ntsig tau txais los ntawm desorbing cov kub - cov pa roj carbon monoxide rov qab los ntawm ionization kom tau txais cov khoom kub.