Cov txheej txheem tseem ceeb ntawm Agitation Cyanidation Leaching hauv Kub Mines

Introduction

Kev siv tshuaj cyanidation leaching, uas tau siv rau hauv kev tsim khoom lag luam txij li xyoo 1887. yog ib qho txheej txheem Leaching minerals uas siv cov tshuaj Cyanide ua cov neeg sawv cev leaching los rho tawm kub thiab nyiaj los ntawm cov khoom siv raw kub thiab nyiaj. Agitation cyanidation leaching yog ib qho ntawm cov txheej txheem tseem ceeb hauv cyanidation leaching, thiab siv dav hauv kev lag luam mining kub.

Lub hauv paus ntsiab lus ntawm Agitation Cyanidation Leaching

Cyanide, xws li Sodium Cyanide (NaCN), yog ib qho tseem ceeb hauv cov txheej txheem cyanidation. Sodium cyanide yog ib qho tsis muaj xim thiab pob tshab siv lead ua, feem ntau yog greyish-daj vim muaj cov khoom tsis huv. Nws yaj tau zoo heev hauv dej, nrog rau kev yaj hauv dej ntau dua 20%. Thaum pH ntawm nws cov kua dej yog acidified rau pH = 7. cyanide yuav luag tag nrho decomposes rau hauv volatile hydrogen cyanide roj, uas yog ib qho tsis muaj xim thiab muaj kuab lom heev. Hauv cov kua, hydrogen cyanide yog ib qho kua qaub tsis muaj zog, nyuaj rau ionize, thiab tsis muaj leaching nyhuv rau kub thiab nyiaj. Thaum pH tus nqi yog 12. cyanide hauv cov kua yuav luag tag nrho dissociates rau hauv cyanide ions. Yog li ntawd, kev ua haujlwm cyanidation yuav tsum tau ua nyob rau hauv ib qho alkaline nruab nrab.

Feem ntau, nyob rau hauv lub xub ntiag ntawm oxygen, lub cyanidation leaching ntawm kub yog ib tug electrochemical corrosion txheej txheem. Cyanide reacts nrog kub nyob rau hauv ib qho chaw alkaline nrog kev koom tes ntawm cov pa oxygen, tsim cov dej-soluble kub cyanide complexes, yog li ua kom lub dissolution ntawm kub los ntawm cov ore.

Txheej txheem ntawm Agitation Cyanidation Leaching

1. Kev npaj ntawm Leaching Raw Materials

• Kev Sib Tsoo : Cov hlau kub nyoos uas tau khawb los yuav raug muab tso rau hauv lub tshuab zom ua ntej kom sib tsoo. Cov txheej txheem sib tsoo muab faib ua kev sib tsoo ntxhib, kev sib tsoo nruab nrab, thiab kev sib tsoo me me. Cov tshuab zom pob zeb thiab cov tshuab zom pob zeb feem ntau siv rau kev sib tsoo ntxhib thiab nruab nrab, feem ntau yog siv los rhuav cov hlau loj ua tej daim me me, feem ntau yog tswj qhov loj ntawm cov hlau me me ntawm ob peb centimeters. Cov tshuab zom rauj feem ntau yog siv rau kev sib tsoo me me.

• Kev Sib Tsoo : Cov hlau uas raug tsoo yuav nkag mus rau hauv lub tshuab sib tsoo pob kom sib tsoo ntxiv kom tau qhov loj me uas tsim nyog. Feem ntau, nws yuav tsum tau kom qhov loj me ntawm cov hlau txog -200 mesh uas yog 60% - 90%, kom cov hlau kub sib cais tag nrho. Feem ntau, cov tshuab sib tsoo pob hom lattice siv rau kev sib tsoo ntxhib, thiab cov tshuab sib tsoo pob hom overflow siv rau kev sib tsoo zoo.

• Kev Npaj Slurry : Cov hmoov av ore pulp nkag mus rau hauv lub tank stirring. Ntxiv dej kom tsim nyog los kho qhov concentration ntawm cov hmoov ore pulp, feem ntau tswj tau ntawm 30% - 50%. Tib lub sijhawm, ntxiv cov adjusters xws li lime los kho qhov pH ntawm cov hmoov ore pulp mus rau 10 - 11. tsim kom muaj ib puag ncig alkaline uas ua rau cyanidation leaching thiab tiv thaiv kev yaj ntawm lwm yam impurities.

2. Kev ntxhov siab Cyanidation Leaching

• Ntxiv Cov Tshuaj Reagent Leaching : Cov tshuaj cyanide xws li sodium cyanide (NaCN) lossis potassium cyanide (KCN) raug ntxiv rau hauv cov hmoov hlau uas tau kho lawm. Thaum lub sijhawm sib xyaw tag nrho, cyanide ua rau muaj kev sib xyaw nrog kub los tsim cov tshuaj kub cyanide uas yaj tau hauv dej.

• Cov Khoom Siv Rau Kev Tso Kua : Cov txheej txheem tso kua feem ntau yog ua nyob rau hauv ntau lub thoob dej sib xyaw uas txuas nrog cov koob. Cov thoob dej sib xyaw muaj peev xwm muab faib ua peb hom raws li ntau txoj kev sib xyaw: cov thoob dej sib xyaw cua uas raug nias, cov thoob dej sib xyaw tshuab, lossis cov thoob dej sib xyaw.

• Cov Xwm Txheej Kev Tawm : Qhov concentration ntawm Sodium cyanide hauv cov ore pulp feem ntau yog 0.02% - 0.1%. Lime raug ntxiv thaum lub sijhawm ua haujlwm kom ua rau cov ore pulp pH = 9 - 12. Cua raug sau kom tswj tau qhov sib piv zoo tshaj plaws ntawm qhov concentration oxygen yaj thiab qhov concentration sodium cyanide hauv cov ore pulp. Lub sijhawm tawm feem ntau yog 24 - 48 teev kom ntseeg tau tias kub yaj tag.

3. Khoom-kua sib cais thiab ntxuav

• Kev Sib Cais Khoom Khob-Kua : Tom qab leaching, cov ore pulp raug kev sib cais khoom khob-kua los ntawm cov khoom siv xws li thickeners thiab lim kom tau txais cov kua kub thiab cov leaching residue. Cov thickeners siv lub hauv paus ntsiab lus ntawm gravitational sedimentation kom ua rau cov khoom khov hauv cov ore pulp poob rau hauv qab, thiab cov supernatant yog cov kua kub. Cov lim dej ntxiv lim cov dej ntws ntawm cov thickener kom txhim kho cov nyhuv ntawm kev sib cais khoom khob-kua.

• Kev Ntxuav : Yuav kom tau txais kev sib cais txaus ntawm cov cyanide leachate thiab cov leach residue, feem ntau siv cov txheej txheem ntxuav ntawm 3 - 5 theem ntawm kev ua kom tuab, kev lim dej, lossis kev sib xyaw ua ke ntawm ob qho tib si. Qhov no yog ib qho kev ua haujlwm tseem ceeb rau kev ntxuav cyanidation. Txoj kev siv feem ntau yog txoj kev sib cais tam sim no (CCD txoj kev). Cov thickeners siv hauv txoj kev no tuaj yeem faib ua ib txheej thiab ntau txheej. Ntau lub cyanidation concentrators hauv Suav teb siv 2 - 3 txheej thickeners rau kev sib cais khoom khov-kua thiab kev ntxuav tam sim no tas mus li.

4. Kub rov qab

• Txoj Kev Hloov Pauv Hmoov Zinc : Hmoov zinc raug ntxiv rau hauv cov kua kub uas muaj cov tshuaj kub. Zinc ua rau cov tshuaj kub cyanide ua rau muaj kev hloov pauv, ua rau kub txo qis rau hauv cov kub hlau thiab ua rau nws poob. Tom qab lim dej, cov av kub tau txais, thiab cov av kub raug smelted los ntawm cov txheej txheem xws li yaj kom tau txais cov kub nyoos.

• Txoj Kev Nqus Cov Pa roj Carbon Activated : Cov pa roj carbon activated raug ntxiv rau hauv cov kua kub uas muaj cov kub, thiab cov pa roj carbon activated raug nqus los ntawm cov pa roj carbon activated. Tom qab ntawd, kub raug rov qab los ntawm cov pa roj carbon activated los ntawm cov txheej txheem xws li desorption thiab electrowinning. Txoj kev no tuaj yeem faib ua txoj kev carbon-in-pulp (CIP) thiab txoj kev carbon-in-leach (CIL).

• Txheej Txheem CIP : Ua ntej, cyanidation leaching raug ua tiav, thiab tom qab ntawd cov pa roj carbon activated raug ntxiv rau hauv cov ore pulp kom nqus tau kub. Hauv txheej txheem CIP, leaching thiab adsorption yog ob txoj haujlwm ywj pheej. Hauv kev ua haujlwm adsorption, cov txheej txheem leaching tau ua tiav lawm, thiab qhov loj me, ntau npaum li cas, thiab cov xwm txheej ua haujlwm ntawm cov tank adsorption raug txiav txim siab los ntawm cov txheej txheem adsorption.

• Txheej Txheem CIL : Cov pa roj carbon ua kom muaj zog ntxiv rau hauv lub tank leaching, thiab kev leaching thiab adsorption tau ua tiav tib lub sijhawm, uas yog, kev leaching thiab adsorption tshwm sim tib lub sijhawm. Hauv cov txheej txheem CIL, kev ua haujlwm leaching thiab adsorption tau ua tiav tib lub sijhawm. Feem ntau, kev ua haujlwm leaching xav tau lub sijhawm ntev dua li kev ua haujlwm adsorption. Yog li ntawd, qhov loj me, aeration, thiab dosing ntawm lub tank yog txiav txim siab los ntawm cov txheej txheem leaching. Txij li thaum tus nqi adsorption yog ib qho kev ua haujlwm ntawm qhov concentration ntawm cov kub yaj hauv cov tshuaj, txhawm rau kom nce qhov concentration ntawm cov kub yaj hauv cov tank adsorption pem hauv ntej thiab tib lub sijhawm nce lub sijhawm leaching, 1 - 2 theem ntawm pre-leaching feem ntau yog ntxiv ua ntej leaching thiab adsorption.

5. Kev kho mob tailing

Cov tailings tom qab Gold Recovery feem ntau muaj qee qhov seem cyanide thiab lwm yam impurities. Rau cov kev cai tiv thaiv ib puag ncig, cov tailings yuav tsum tau kho kom zoo. Cov txheej txheem kho mob feem ntau suav nrog cov txheej txheem oxidation tshuaj (xws li txoj kev sulfur dioxide - huab cua), kev lwj ntawm ntuj, lossis cov txheej txheem biodegradation kom txo qhov concentration ntawm cov seem cyanide kom qis dua tus qauv hauv tebchaws thiab tiv thaiv kev ua qias tuaj rau ib puag ncig. Cov tailings kho tau tuaj yeem pov tseg los ntawm kev sib sau ua ke lossis lwm txoj hauv kev tsim nyog.

xaus

Kev siv Agitation cyanidation leaching yog ib qho txheej txheem tseem ceeb hauv kev rho tawm kub ntawm cov pob zeb kub. Los ntawm ntau yam txheej txheem xws li kev npaj cov khoom siv raw, kev sib xyaw ua ke, kev sib cais khoom khov - kua, kev rov qab tau kub, thiab kev kho cov tailings, kub tuaj yeem rho tawm tau zoo ntawm cov pob zeb kub. Txawm li cas los xij, vim yog qhov lom ntawm cyanide, thaum siv Agitation Cyanidation Leaching , yuav tsum tau ua tib zoo saib xyuas kev tsim khoom thiab kev tiv thaiv ib puag ncig kom ntseeg tau tias kev lag luam khawb kub muaj kev txhim kho tas mus li.