Nkag siab txog Gold Ore Processing CIL, CIP: Sodium Cyanide Siv

Hais lus nruj me ntsis, cov txheej txheem cyanidation tsis poob rau hauv qeb ntawm kev ua cov khoom siv hauv av tab sis yuav tsum tau muab faib ua hydrometallurgy. Kev siv cyanidation los rho tawm kub yog txoj kev siv ntau tshaj plaws hauv ntiaj teb. Nws lub hauv paus CIP yog nyob ntawm kev sib xyaw ntawm cyanide ions nrog kub dawb los tsim kub cyanide, yog li ua tiav qhov yaj ntawm kub. Peb paub tias kub hauv xwm muaj nyob rau hauv lub xeev dawb; txawm tias thaum nws raug encapsulated hauv lwm cov zaub mov, nws tseem yog cov kub elemental thaum raug. Yog li ntawd, peb tuaj yeem hais tias qhov ua tau zoo (rov qab tus nqi) ntawm cov txheej txheem cyanidation hauv kev rho tawm kub, rau qee qhov, nyob ntawm lub peev xwm los tso cov kub encapsulated.

Cov txheej txheem CIL (Carbon In Leach) leaching txheej txheem, tseem hu ua carbon leaching rau kub extraction, yog ib tug txheej txheem uas yuav ntxiv activated carbon rau lub pulp thiab ib txhij ua leaching thiab kub adsorption. Qhov no ua kom yooj yim rau ob kauj ruam ntawm cyanide leaching ntawm lub pulp thiab activated carbon adsorption pom nyob rau hauv CIP (Carbon Hauv Pulp) txheej txheem rau hauv ib kauj ruam, txo qhov poob thaum txo tus nqi tswj. Piv nrog rau cov txheej txheem CCD ib txwm muaj, nws txuag tau 66% ntawm cov nqi peev, ua rau nws nyiam cov txheej txheem rau kev ua haujlwm kub niaj hnub. Hauv cov txheej txheem carbon pulp, "carbon" thiab "pulp" xa mus rau cov pa roj carbon monoxide thiab cov ntxhia pob zeb, feem, es tsis yog kev ncua ntawm cov pa roj carbon monoxide raws li peb feem ntau xav. Nyob ntawm lub sij hawm ntawm cov pa roj carbon activated cov lus qhia, peb xa mus rau cov txheej txheem ntawm leaching raws li adsorption raws li cov pa roj carbon pulp method (CIP), thaum tib lub sij hawm leaching thiab adsorption hu ua carbon leaching method (CIL). Vim nws txoj kev siv cov cuab yeej siv tau zoo dua, ntau cov nroj tsuag cyanide tau siv txoj kev no. Nws cov txiaj ntsig tseem ceeb suav nrog kev tshem tawm qhov xav tau rau kev ntxuav cov ntaub so ntswg thiab cov kua dej sib cais, vim nws ncaj qha siv cov pa roj carbon activated los adsorb kub los ntawm cov ntaub so ntswg, hloov cov ntxhua khaub ncaws, cov kua dej sib cais, thiab kev qhia meej, degassing, thiab zinc hloov cov haujlwm ntawm cov leachate. Qhov no ua kom yooj yim rau cov txheej txheem kev tsim khoom, txhim kho kev ua haujlwm, thiab txo cov khoom siv thiab kev nqis peev hauv vaj tse.

Cov txheej txheem cyanidation yuav tsum nruj sib tsoo fineness.

Rau cov kub-bearing quartz vein oxidized ores, vim cov neeg pluag floatability ntawm cov kub bearing minerals, nws yog feem ntau nyuaj rau ua tiav zoo ntxhia ua cov cim siv flotation txoj kev. Txawm li cas los xij, los ntawm kev siv cov txheej txheem carbon pulp, nws muaj peev xwm ua tiav tag nrho cov nyiaj rov qab ntawm ntau dua 93% nyob rau hauv cov xwm txheej ntawm cov teeb meem me me.

Raws li tau hais ua ntej, qhov ua tau zoo ntawm cov txheej txheem cyanidation nyob ntawm lub peev xwm los tso cov kub kub, ua rau kev sib tsoo tshwj xeeb yog qhov tseem ceeb hauv kev npaj ua haujlwm ntawm cov nroj tsuag carbon pulp. Nyob rau hauv cov pa roj carbon ntau cov nroj tsuag, kev sib tsoo fineness haum rau cyanidation feem ntau yuav tsum tau 80-95% ntawm cov khoom yuav finer tshaj -0.074 hli. Hauv qee qhov mines nrog kev faib cov pob zeb hauv av, qhov yuav tsum tau ua rau ntau dua 95% kom zoo dua -0.037 hli. Qhov no qhia tau hais tias ua tiav qhov yuav tsum tau ua kom zoo nyob rau hauv ib theem ntawm kev sib tsoo hauv cov pa roj carbon pulp nroj tsuag yog qhov nyuaj heev, feem ntau yuav tsum muaj ob lossis peb theem ntawm kev sib tsoo.

Kev tswj ntawm kev sib tsoo concentration yog ua tiav los ntawm kev kho cov dej ntim, ore pub nyiaj, thiab rov qab xuab zeb piv. Yog hais tias qhov sib tsoo concentration siab dhau lawm, cov dej ntim yuav tsum tau nce ntxiv, cov ore pub nyiaj nyob rau hauv ob-theem kaw-circuit sib tsoo txheej txheem yuav tsum tau txo, thiab rov qab xuab zeb ratio yuav tsum tau nce, thiab vice versa. Kev tswj cov dej ntws tawm tuaj yeem tswj tau los ntawm kev kho cov dej ntws tawm ntim dej, qhov siab ntawm cov dej ntws tawm, qhov loj thiab qhov hluav taws xob, thiab qhov hluav taws xob ntws tawm. Kev tswj cov dej ntws zoo yuav tsum tau hloov kho rau qhov siab ntawm cov dej ntws tawm, qhov loj ntawm lub qhov hluav taws xob ntws tawm, tus nqi thiab qhov sib piv ntawm cov pob steel, sib tsoo concentration, thiab cov dej ntws tawm.

Hauv cov ntsiab lus, tag nrho cov kev ntsuas kev ua haujlwm hauv kev sib tsoo yog qhov sib cuam tshuam, ua tiav, thiab kev sib koom ua ke. Yog li ntawd, ib qho kev qhia dav dav thiab kev sib koom ua ke yuav tsum tau ua thaum lub sijhawm hloov kho thiab tswj cov txheej txheem.

Tiv thaiv cov hydrolysis ntawm cyanides tseem ceeb heev.

Cov Cyanides uas peb feem ntau siv (potassium cyanide, Sodium cyanide , calcium cyanide) yog cov hauv paus muaj zog thiab cov ntsev tsis muaj zog, uas yooj yim hydrolysis hauv dej, tsim cov hydrogen cyanide uas tuaj yeem cuam tshuam rau qhov concentration ntawm cyanide ions hauv lub pulp. Yog li ntawd, nws yog qhov tseem ceeb kom tiv thaiv hydrolysis ntawm cyanides thaum lub sijhawm leaching. Txoj kev zoo tshaj plaws yog kom nce qhov concentration ntawm hydroxide ions, uas yog qhov peb feem ntau xa mus rau kev nce tus nqi pH. Tus neeg sawv cev kho pH pheej yig tshaj plaws hauv kev lag luam yog txiv qaub ntsuab, tab sis txiv qaub ntsuab kuj tuaj yeem ua rau flocculation thaum kho pH. Yog li ntawd, peb ntxiv nws thaum lub sijhawm sib tsoo kom ntseeg tau tias nws tau tawg zoo. Thaum lub sijhawm cyanide leaching, cov tshuaj yuav tsum tswj hwm qee qhov alkalinity kom tiv thaiv kev lwj ntawm cyanides, tab sis alkalinity ntawm cov tshuaj cyanide yuav tsum tsis txhob siab dhau, vim qhov no tuaj yeem txo qhov kev yaj ntawm kub.

Raws li lub sij hawm leaching nce, tus kub leaching tus nqi txhim kho, tab sis tom qab ib tug tej yam taw tes, ncua lub sij hawm leaching ntxiv tsis ho nce tus nqi leaching kub. Yog li ntawd, nws yog ib qho tseem ceeb los xyuas kom meej lub sij hawm leaching thaum lub sij hawm cyanide leaching kom lav zoo kub leaching. Feem ntau, tus nqi pH thaum lub sij hawm carbon pulp ua hauj lwm zoo tshaj thaum nws nyob nruab nrab ntawm 10 thiab 11.

Kev tswj cov pulp concentration yog ib qho tseem ceeb ntawm cov txheej txheem cyanidation.

Txawm hais tias nws yog kub thiab cyanide lossis kub cyanide thiab cov pa roj carbon activated, kev sib cuag txaus yog qhov tsim nyog kom ua tiav cov txiaj ntsig zoo ntawm cov ntxhia, uas tso cov kev xav tau siab ntawm cov tawv nqaij. Yog tias qhov concentration siab dhau lawm, nws tuaj yeem yooj yim los nag rau saum npoo ntawm cov pa roj carbon activated; yog tias nws qis dhau, nws tuaj yeem kho tau yooj yim. Tsis tas li ntawd, txhawm rau tswj hwm tus nqi pH uas tsim nyog thiab cyanide concentration, ntau cov tshuaj reagents yuav tsum tau ntxiv. Thaum xaiv cyanide, yam xws li lawv cov txheeb ze muaj peev xwm yaj kub, ruaj khov, thiab qhov cuam tshuam ntawm impurities ntawm kub dissolution yuav tsum raug txiav txim siab.

Tom qab xyoo ntawm kev xyaum ntau lawm, nws ntseeg tau hais tias ib tug concentration ntawm 40-45% rau carbon pulp extraction thiab ib tug cyanide concentration ntawm 300-500 ppm yog ntau haum. Txawm li cas los xij, raws li tau hais ua ntej, kev sib tsoo feem ntau xav tau ob mus rau peb theem ntawm kev ua haujlwm, thiab qhov kawg ntawm cov khoom siv feem ntau yog qis dua 20%. Yog li ntawd, ua ntej nkag mus rau hauv lub leaching lub lag luam, lub pulp yuav tsum tau mus rau ib tug thickening txheej txheem.

Kev tswj hwm ntawm Sodium Cyanide concentration thaum lub sijhawm ua haujlwm leaching yuav tsum ua raws li cov ntsiab cai no: thaum ua kom ntseeg tau tias cov kub yaj zoo, txo qhov sodium cyanide concentration kom tsim nyog kom ua rau sodium cyanide concentration sib xws thoob plaws txhua lub tank leaching, lossis xyuas kom meej tias sodium cyanide concentration hauv cov tank leaching ua ntej siab dua li cov tom qab. Qhov me dua ntawm qhov kev hloov pauv ntawm sodium cyanide concentration tswj hwm hauv txhua lub tank leaching, qhov zoo dua. Nws yog qhov zoo dua rau qhov piv ntawm cov tank leaching uas ntxiv sodium cyanide rau tag nrho cov tank leaching kom siab dua. Kev ntsuas qhov sodium hydroxide concentration ntau zaus yog qhov zoo rau kev tswj hwm cov xwm txheej kev ua haujlwm. Sodium cyanide feem ntau yog ntxiv rau txhua lub tank ntawm qhov concentration ntawm kwv yees li 10%.

Lub Mechanism ntawm Cyanide Leaching Process

Los ntawm cov qauv saum toj no, nws tuaj yeem pom tau tias cov txheej txheem cyanidation yog cov txheej txheem uas yuav tsum tau muaj cov pa oxygen, vim tias kev siv cov pa oxygen thaum lub sijhawm tsim khoom tuaj yeem ua kom nrawm nrawm. Tau kawg, peb tuaj yeem tsim nyog ntxiv cov tshuaj oxidizing, xws li hydrogen peroxide; Txawm li cas los xij, cov oxidants ntau dhau tuaj yeem ua rau tsim cov cyanate ions los ntawm cyanide, uas tsis muaj txiaj ntsig rau cov txheej txheem leaching.

Los ntawm cov mis, peb kuj tuaj yeem pom tias 1 mol ntawm kub tsuas yog 2 mol ntawm cyanide rau complexation. Nyob rau hauv cov nqe lus ntawm huab hwm coj, kwv yees li 1 g ntawm kub yuav tsum tau 0.5 g ntawm cyanide raws li ib tug leaching neeg sawv cev. Txawm li cas los xij, hauv kev tsim khoom tiag tiag, vim muaj kev cuam tshuam ntawm lwm yam minerals, xws li nyiaj, tooj liab, txhuas, thiab zinc, uas tuaj yeem ua rau muaj kev cuam tshuam nrog cyanide, qhov ntau npaum li cas ntawm reagents yuav tsum tsis txhob txwv rau kev suav ib leeg. Nws yuav tsum tau kho raws li qhov kawg leaching tus nqi, thiab kev kho yuav tsum tau taug qab thaum lub ore khoom hloov. Feem ntau, qhov ntau ntawm 200 mus rau 500 lub sij hawm siab dua tus nqi suav yog suav tias tsim nyog. Nyob rau hauv cov ntsiab lus, kom ntseeg tau lub concentration ntawm cyanide ions nyob rau hauv lub pulp yog ib tug tsim nyog mob rau ua tau zoo ntsuas.

Thaum cov kub adsorbed ntawm cov pa roj carbon ntau tshaj 3000 g / t, peb xav tias tag nrho cov pa roj carbon pulp adsorption txheej txheem tiav. Txawm li cas los xij, ores nrog siab impurities ntawm tooj liab thiab nyiaj kuj tuaj yeem cuam tshuam rau lub peev xwm adsorption ntawm cov pa roj carbon activated, uas ua rau kub-loaded carbon tsis ua raws li peb lub hom phiaj. Thaum cov pa roj carbon activated tsis muaj peev xwm adsorption lawm, peb xav tias nws yuav saturated. Rau saturated activated carbon, peb yuav tsum desorb thiab electrolyze kom tau kub. Txawm li cas los xij, cov haujlwm tom ntej no yog qhov nyuaj dua thiab xav tau kev nqis peev loj dua. Hauv cov cheeb tsam uas muaj kub ntau lawm, peb tuaj yeem muag cov kub-loaded carbon rau cov nyiaj tau los, los yog ib txoj kev yooj yim dua yog kom tau kub los ntawm kev kub hnyiab.

Shaanxi United Chemical yog cov chaw tsim khoom thiab cov chaw muag khoom ntawm sodium cyanide, cov tshuaj tseem ceeb siv hauv ntau yam kev lag luam xws li mining thiab tshuaj synthesis. Pab neeg tshaj lij ntawm United Chemical tsis tsuas yog muab cov khoom lag luam tab sis kuj tau mob siab rau muab kev txhawb nqa dav dav. Nrog kev paub txog kev lag luam dav dav, peb cov kws tshaj lij muaj peev xwm los daws cov lus nug lossis cov teeb meem uas koj yuav ntsib. Los ntawm xaiv Shaanxi United Chemical Raws li koj tus neeg muab khoom siv sodium cyanide, koj yuav tau txais kev nkag mus rau ntau yam kev paub thiab kev pabcuam uas tuaj yeem txhim kho koj cov haujlwm thiab txhim kho kev ua haujlwm. Koom tes nrog peb tam sim no kom paub txog kev txhawb nqa kev tshaj lij thiab cov khoom lag luam zoo.