Cyanidation Leaching Techniques rau High-Sulfur thiab High-Arsenic Kub Ores

Kev kho mob ntawm high-sulfur thiab high-arsenic kub ores tau ntev dhau los ua qhov teeb meem nyuaj hauv kev ua cov ntxhia. Vim lawv cov ntxhia complex muaj pes tsawg leeg thiab siab cov ntsiab lus ntawm impurities, tsoos cyanidation txoj kev feem ntau tawm tsam kom zoo extract kub thiab nyiaj. Tsab ntawv xov xwm no yuav muab cov lus qhia ntxaws ntxaws rau ntau txoj hauv kev leaching haum rau high-sulfur thiab high-arsenic kub ore, aiming pab mining practitioners zoo nkag siab thiab siv cov technologies.

Cov yam ntxwv ntawm High-Sulfur thiab High-Arsenic Gold Ores

High-sulfur thiab high-arsenic kub ores feem ntau muaj ntau ntawm sulfides thiab arsenides. Cov impurities no tsis tsuas yog cuam tshuam rau kev ua haujlwm ntawm leaching ntawm kub thiab nyiaj tab sis kuj ua rau muaj kev hem thawj rau ib puag ncig. Yog li ntawd, thaum soj ntsuam nrog xws li ores, cov txheej txheem tshwj xeeb yuav tsum tau los txhim kho tus nqi rov qab ntawm kub thiab nyiaj thiab txo qhov cuam tshuam ib puag ncig.

Oxidative Roasting Method

Txoj kev oxidative roasting yog ib txoj hauv kev uas feem ntau siv los kho cov sulfur thiab high-arsenic kub ore. Txoj kev no oxidizes sulfur thiab arsenic nyob rau hauv cov ore rau hauv gaseous los yog khoom oxides los ntawm high-temperature roasting, yog li tshem tawm impurities. Tom qab roasting, lub ore qauv yuav xoob, uas yog ntau conducive rau leaching ntawm kub thiab nyiaj.

Cov kauj ruam tshwj xeeb ntawm oxidative roasting txoj kev yog raws li nram no:

1. High-temperature roasting yog nqa tawm ntawm high-sulfur thiab high-arsenic kub concentrate tau los ntawm flotation kom tshem tawm cov sulfur thiab arsenic.

2. Cov roasted ore undergoes high-acid pretreatment ntxuav kom dissolve feem ntau ntawm impurities.

3. Cov ore ntxuav yog ces raug cyanidation leaching, qhov twg kub thiab nyiaj yog yaj los ntawm cyanide thiab nkag mus rau qhov kev daws teeb meem.

Thiourea Leaching Method

Txoj kev thiourea leaching txoj kev yog ib qho txheej txheem uas tsis tshua muaj toxicity kub extraction, tshwj xeeb tshaj yog haum rau kev kho kub ores nrog siab arsenic thiab sulfur ntsiab lus. Thiourea hauv cov kua qaub tuaj yeem yaj kub thiab nyiaj sai sai, muaj cov tshuaj toxicity tsawg, thiab yooj yim rau rov tsim dua tshiab. Piv nrog rau cov txheej txheem cyanidation ib txwm, txoj kev thiourea tsis tshua nkag siab rau cov ntxhia hauv cov khoom xws li antimony, arsenic, tooj liab, thiab sulfur. Yog li, nws muaj qhov pom tseeb zoo thaum kho cov sulfur thiab high-arsenic kub ore.

Cov kauj ruam tshwj xeeb ntawm thiourea leaching txoj kev yog raws li nram no:

1. Kub-bearing sulfide concentrate yog tau los ntawm flotation.

2. Lub flotation concentrate yog leached nrog thiourea tov kom rov qab kub thiab nyiaj.

3. Kub thiab nyiaj nyob rau hauv cov tshuaj leaching yog adsorbed los ntawm ion pauv resins lossis activated carbon thiab tom qab ntawd ua kev kho mob tom qab.

Heap Leaching Method

cov Heap leaching txoj kev yog ib txoj kev leaching nrog cov nqi qis qis thiab kev ua haujlwm yooj yim, tsim nyog rau kev kho cov qib qis sulfur thiab high-arsenic kub ore. Txoj kev no suav nrog piling cov ore rau ntawm qhov chaw npaj ua ntej thiab txau lossis percolating nrog cov tshuaj cyanide leaching, tso cai rau cov tshuaj percolate los ntawm cov ore thiab tsim cov nyhuv leaching.

Cov kauj ruam tshwj xeeb ntawm txoj kev heap leaching yog raws li hauv qab no:

1. Cov ore yog crushed rau ib tug tej yam particle loj thiab ces piled rau ntawm qhov chaw.

2. Cov ore yog txau los yog percolated nrog cov tshuaj cyanide leaching, thiab cov tshuaj percolates los ntawm cov ore los tsim cov nyhuv leaching.

3. Cov tshuaj leaching tau sau, thiab kub thiab nyiaj tau rov qab los ntawm cov ion pauv resins, Kev ua kom cov pa roj carbon kev nqus dej, lossis kev hloov zinc.

Stirred Leaching Method

Txoj kev nplawm leaching yog ib txoj kev leaching zoo haum rau kev kho cov nplua-grained oxidized ores los yog sulfide ore calcines. Txoj kev no siv cov tshuaj sulfuric acid uas muaj kuab heev los ntxuav cov ore nyob rau hauv lub tank leaching nruab nrog lub tshuab nplawm. Vim muaj kev sib tov txaus, qhov leaching ceev ceev, thiab tus nqi leaching yog siab.

Cov kauj ruam tshwj xeeb ntawm txoj kev stirred leaching yog raws li nram no:

1. Cov ore yog crushed rau cov khoom zoo (-75um accounting rau 90%) thiab tom qab ntawd ntxiv rau lub tank leaching.

2. Stirred leaching yog nqa tawm nrog ib tug kuj concentrated sulfuric acid tov. Cov tooj liab concentration hauv cov tshuaj leaching yog qhov siab thiab tuaj yeem siv ncaj qha rau tooj liab electrowinning.

3. Cov tshuaj leaching tau txais kev kho mob tom ntej kom rov qab tau kub thiab nyiaj.

xaus

Kev kho mob ntawm high-sulfur thiab high-arsenic kub ores yuav tsum tau txais cov txheej txheem tshwj xeeb ntws los txhim kho tus nqi rov qab ntawm kub thiab nyiaj thiab txo qhov cuam tshuam ib puag ncig. Txoj kev oxidative roasting, thiourea leaching method, heap leaching method, thiab stirred leaching method yog txhua txoj kev kho mob zoo.