Cyanidation txheej txheem thov thiab tshawb fawb rau tooj liab-Bearing Kub Ores

Introduction

Hauv kev rho kub, cov txheej txheem cyanidation tau ntev los ua lub hauv paus tseem ceeb vim nws xaiv tau thiab ua tau. Txawm li cas los xij, thaum cuam tshuam nrog cov hlau kub uas muaj tooj liab, qhov nyuaj ntawm cov mineralogy ua rau muaj kev cov nyom tshwj xeeb. Raws li cov hlau tooj liab, nyiaj, thiab kub thoob ntiaj teb txuas ntxiv poob qis, thiab cov mineralogy ib puag ncig los ua ntau yam, nws yog qhov tseem ceeb heev rau kev ua kom zoo dua cov txheej txheem cyanidation rau cov hlau nyuaj no. Cov ntawv blog no delves rau hauv daim ntawv thov thiab kev tshawb fawb ntawm cyanidation rau cov hlau kub uas muaj tooj liab, lub hom phiaj los muab kev nkag siab rau hauv cov txheej txheem kho mob zoo.

Kev sib tw hauv Cyanidating Copper-Bearing Gold Ores

Mineralogical complexity

Cov pob zeb kub uas muaj tooj liab feem ntau muaj ntau yam minerals, suav nrog cov hlau sulfide minerals xws li pyrite, pyrrhotite, chalcopyrite, thiab sphalerite. Tsis tas li ntawd, lawv yuav muaj cov ions xws li Fe²⁺, Cu²⁺, Zn²⁺, S²⁻, thiab Fe³⁺ hauv cov ore pulp. Thaum lub sijhawm cyanidation leaching, cov khoom no tuaj yeem siv ntau cyanide thiab cov pa oxygen yaj. Piv txwv li, qhov muaj Cu²⁺ tuaj yeem cuam tshuam nrog cyanide, tsim cov khoom ruaj khov, yog li txo cov cyanide dawb uas muaj rau kev yaj kub. Qhov no tsis yog tsuas yog ua rau kev siv cyanide ntau ntxiv xwb tab sis kuj txo qhov ua tau zoo ntawm kev leaching kub.

Kev siv Cyanide

Cov tooj liab ntau hauv cov ores ua rau siv cyanide ntau dhau . Cov tooj liab uas yaj tau hauv cov leach liquors reacts nrog cyanide, ua rau cov nqi khiav lag luam siab heev. Qee zaum, cov qib tooj liab hauv cov pub yuav hloov pauv raws sijhawm, raws li pom hauv Anglo Asian Mining's Geda Bek mine hauv Azerbaijan. Tom qab pib lub tshuab leach thiab resin - hauv - pulp gold ore processing plant, cov qib tooj liab siab dua li qhov xav tau ua rau kev siv cyanide ntau ntxiv, txawm hais tias lub Hoobkas muaj peev xwm tswj tau cov tooj liab ntau hauv cov leach liquors yam tsis cuam tshuam rau kev tsim kub.

Daim ntawv thov ntawm Cyanidation txheej txheem rau tooj liab-Bearing kub Ores

Ammonia - Pab Cyanide Leaching

Ib txoj hauv kev los daws cov teeb meem hauv cyanidating tooj liab-cov kabmob kub ore yog siv ammonia - pab cyanide leaching. Hauv Geda Bek mine, ammonia tau nkag mus rau hauv leaching Circuit Court kom txo tau cyanide noj. Txoj kev no tau pom tias ua tau zoo nyob rau hauv ib nrab ntawm kev rho tawm ntawm tooj liab, yog li ua rau txo qis hauv cyanide noj nyob rau hauv tag nrho - scale leaching system. Kev siv ammonia hauv tooj liab - kub cyanide leach systems muaj keeb kwm ntev, yos rov qab mus rau 1902 thaum Hunt patented nws siv los txo cyanide noj thaum kub leaching los ntawm tooj liab - bearing ores. Cov txheej txheem ammonia - cyanide tau siv los ua lag luam los kho tailings los ntawm Comstock Lode hauv Nevada thiab cupriferous kub ore ntawm Dale, California.

Pretreatment ntawm Ore Pulp

Pretreatment ntawm ore pulp yog lwm kauj ruam tseem ceeb hauv cov txheej txheem cyanidation rau tooj liab-bearing kub ore. Alkaline pretreatment tuaj yeem txo qhov kev siv ntawm cyanide thiab txhim kho cov cyanide leaching tus nqi ntawm kub. Thaum cov ore pulp tsis pretreated, qhov dawb CN⁻ nyob rau hauv nws yog qhov tsawg tshaj plaws, qhia tias CN⁻ tau noj los ntawm Fe²⁺, Zn²⁺, S²⁻ thiab lwm yam ions, thiab cov ntsiab lus ntawm Cu²⁺, Fe³⁺, Zn²⁺ ions kuj yog qhov qis tshaj. Tom qab pretreatment, cov dawb CN⁻ nyob rau hauv lub ore pulp yog kuj siab, thiab cov Cu²⁺, Fe³⁺, Zn²⁺ ions yog siab tshaj cov uas tsis muaj pretreatment, uas txhais tau hais tias noj dawb CN⁻ tom qab pretreatment yog txo, thiab cov teeb meem ions tsis noj los ntawm CN⁻. Yog li ntawd, alkaline pretreatment ua ntej cyanide leaching yuav pab tau.

Kev Tshawb Fawb thiab Kev Txhim Kho Cov Lus Qhia

Kev tsim kho tshiab ntawm Reagents thiab txheej txheem

Cov kws tshawb nrhiav niaj hnub tshawb nrhiav cov tshuaj reagents tshiab thiab cov txheej txheem los txhim kho cov txheej txheem cyanidation rau tooj liab-cov kabmob kub ore. Piv txwv li, kev siv cov oxidants auxiliary yog ib qho chaw ua kom pom tseeb. Ntxiv oxidants (xws li cov pa ntshiab los yog lwm yam oxides) thaum lub sij hawm leaching txheej txheem yuav ua rau kom cov "zoo active oxygen" cov ntsiab lus nyob rau hauv lub ore pulp, txhim kho lub cyanidation leaching ib puag ncig, ua kom lub leaching ceev, shorten lub sij hawm leaching, thiab txo kev noj cyanide. Kev siv cov khoom siv oxidants tau nthuav dav thoob plaws ntiaj teb raws li kev siv tshuab zoo rau kev ua kom zoo rau cov txheej txheem cyanidation. Tsis tas li ntawd, txoj kev loj hlob ntawm cov leaching agents tshiab, xws li thiosulfate, uas tau pom muaj peev xwm nyob rau hauv leaching kub los ntawm tooj liab-bearing kub ore nrog high efficiency, kuj yog ib qho tseem ceeb kev tshawb fawb taw qhia.

Txheej txheem kev koom ua ke thiab optimization

Kev sib xyaw cov txheej txheem sib txawv kuj tuaj yeem ua rau muaj txiaj ntsig zoo dua. Piv txwv li, kev sib koom ua ke ntawm cov nroj tsuag agitation leach nrog heap leach / ADR / SART cov haujlwm uas twb muaj lawm, raws li ua tiav hauv Geda Bek mine, tuaj yeem ua rau tag nrho cov txheej txheem zoo dua. Lub resin - nyob rau hauv - pulp system, qhov twg kub yog zoo tu qab tso los ntawm leach pulp los ntawm kev sib cuag nrog ib tug kub - tshwj xeeb ion exchange resin, yog ib feem tseem ceeb ntawm no kev koom ua ke. Los ntawm kev ua kom zoo ntawm kev sib xyaw ua ke ntawm cov txheej txheem thiab cov cuab yeej siv no, kev ua haujlwm tag nrho ntawm cov txheej txheem cyanidation rau tooj liab-cov kabmob kub ore tuaj yeem txhim kho.

xaus

Cov txheej txheem cyanidation rau tooj liab-cov kabmob kub ore tseem yog ib txoj hauv kev tseem ceeb hauv kev lag luam mining txawm tias nws cov nyom. Los ntawm cov tswv yim xws li ammonia - pab cyanide leaching, ore pulp pretreatment, thiab kev tshawb fawb txuas ntxiv thiab txhim kho cov reagents tshiab thiab cov txheej txheem kev sib koom ua ke, kev ua tau zoo thiab kev lag luam ntawm cov txheej txheem cyanidation tuaj yeem txhim kho. Raws li kev lag luam mining tseem ntsib cov teeb meem ntawm kev poob qis ore qib thiab complex mineralogy, nruam innovation nyob rau hauv cov txheej txheem cyanidation rau tooj liab-bearing kub ore yuav yog ib qho tseem ceeb los xyuas kom meej ruaj khov kub.