Technical Requirements of Granulation, Piling and Spraying in Gold Pile Leaching Process

Cov txheej txheem leaching ntawm cov kub suav nrog kev muab cov kub qis lossis cov tailings flotation tso rau ntawm cov khoom siv hauv paus thiab txau cov tshuaj Sodium cyanide kom yaj cov kub hauv cov hlau thiab rov qab los ntawm cov tshuaj cev xeeb tub. Cov txheej txheem no feem ntau suav nrog kev tsim kho qhov chaw leaching, kev kho hlau ua ntej (crushing lossis granulation), piling, tshuaj tsuag leaching, rov qab tau kub los ntawm cov tshuaj cev xeeb tub, thiab kev tua kab mob thiab tshem tawm cov khib nyiab hlau. Thaum lub sijhawm leaching, ntau yam kev ntsuas yuav tsum tau tswj kom ua tiav cov txiaj ntsig zoo. Tsab xov xwm no yuav qhia txog cov kev cai ntawm kev granulation, piling thiab txau.

1. Granulation

Yuav kom cov txheej txheem leaching ntawm cov kub ua tiav, cov khoom siv leaching yuav tsum muaj qhov permeability zoo kom cov tshuaj cyanide hla dhau cov ore. Feem ntau cov ores yuav tsum tau tsoo kom txog 25.4 hli lossis me dua ua ntej granulating kom pom cov kub uas muaj nyob hauv cov ore thiab txhim kho qhov ceev ntawm kev rov qab tau kub.

Thaum lub sijhawm ua granulation, cov txiv qaub siv yuav tsum ncav cuag tus nqi pH ntawm 9.5 - 10.5. Vim yog qhov av noo siab ntawm cov hlau (nrog cov dej ntau dua 10%) thiab ntau yam tsis huv hauv cov hlau, qhov concentration ntawm Sodium Cyanide yuav tsum tau nce thaum lub sijhawm ua granulation. Qhov concentration ntawm sodium cyanide raug tswj ntawm kwv yees li 60 - 150 grams ib tuj ntawm cov hlau kub. Tag nrho cov dej hauv cov hlau feem ntau yuav tsum tsis pub tshaj 30%, txwv tsis pub cov hlau yuav yooj yim xoob thiab mos. Lub sijhawm kho yuav tsum ntau dua 72 teev. Yog tias los nag thaum lub sijhawm ua granulation, cov hlau yuav tsum tau npog kom tiv thaiv kev poob kub.

2. Tshem tawm

Cov pob zeb kub leaching qhov chaw tuaj yeem teem rau ntawm txoj kab nqes, hauv hav lossis hauv av tiaj tus. Txawm li cas los xij, rau hauv av tiaj tus, txoj kab nqes ntawm 3% - 5% yog xav tau. Qhov siab ntawm cov ore pawg yuav tsum tsis txhob siab dhau thaum pib, nyiam dua 3 - 4 meters, thiab tuaj yeem nce ntxiv tom qab leaching tus nqi stabilizes.

Tom qab ntxuav thiab ua kom av tiaj tiaj lawm, yuav tsum tau siv tshuaj tiv thaiv kom tsis txhob ntws. Yuav kom tiv thaiv tau cov pob zeb, yuav tsum muaj cov kwj dej ntws tawm nyob ib puag ncig qhov chaw uas cov pob zeb yuav tawm. Cov txheej txheej ntawm qhov chaw uas cov pob zeb yuav tawm tuaj yeem muab tso rau ntawm lub hauv paus uas tau nias kom nruj li 0.5m, thiab tom qab ntawd muab cov tshuaj sodium Carbonate txau rau ntawm nws kom txhim kho nws txoj kev ua haujlwm tiv thaiv kom tsis txhob ntws.

3. Txau

3.1 Txau Concentration

Cov agglomerated ore hais tom qab granulation yuav tsum tsis txhob muab ntxuav dua. Tus nqi pH yuav tsum tau kho los ntawm cov txheej txheem granulation. Vim lub complex muaj pes tsawg leeg ntawm kub ores, qhov concentration ntawm sodium cyanide thaum lub sij hawm thawj zaug txau tuaj yeem tsim nyog. Nws tuaj yeem tswj tau ntawm 0.1% - 0.08% thaum lub sijhawm ncov (thaum kub leaching concentration yog siab tshaj), thiab tom qab ntawd tuaj yeem txo mus rau 0.08% - 0.06%. Nyob rau theem tom ntej, nws tuaj yeem txo qis rau 0.04% - 0.02%. Cov concentration ntawm sodium cyanide tuaj yeem hloov kho txhua lub sijhawm raws li cov ntsiab lus kub hauv cov tshuaj cev xeeb tub.

3.2 Spray Cycle

Lub sij hawm txau yog feem ntau 7 - 8 teev nyob rau ib hnub, thiab feem ntau yuav tsum tsis pub tshaj 10 teev (tab sis cov tshuaj yuav tsum tau txo). Feem ntau, nws yog tshuaj tsuag rau 1 teev thiab nres rau 1 teev lossis tshuaj tsuag rau 1 teev thiab nres rau 2 teev. Lub sij hawm txau yuav tsum tsis txhob ntev dhau, kom cov ore pawg tuaj yeem ua pa oxygen thaum tsis txau. Yog hais tias lub sij hawm txau yog ntev thiab ntau zaus, nws yuav ua rau kom lub ntim ntawm cov tshuaj, txo cov concentration ntawm cov niam cawv, thiab pov tseg sodium cyanide. Nyob rau tib lub sij hawm, nws yuav ua rau kom lub ntim ntawm niam cawv thiab cuam tshuam lub peev xwm adsorption ntawm kub-loaded carbon.

3.3 Kev siv tshuaj tsuag

Qhov muaj zog ntawm cov tshuaj tsuag yog nyob ntawm lub sijhawm txau thiab qhov ntau npaum li cas ntawm cov tshuaj tsuag. Feem ntau, qhov muaj zog ntawm cov tshuaj tsuag yuav tsum tau tswj ntawm 6 - 20L/m2•h (6 - 20L/m2×teev), thiab tsis pub tshaj 25 - 30L/m2•h (uas tuaj yeem xam raws li thaj chaw ntawm qhov chaw leaching, qhov ntau npaum li cas ntawm cov tshuaj tsuag txhua hnub thiab lub sijhawm). Yog tias qhov muaj zog ntawm cov tshuaj tsuag siab, nws yuav ua rau qhov ntim ntawm cov tshuaj yaj hauv cov tshuaj yaj, ua rau cov kub concentration tsis sib haum, thiab cuam tshuam rau lub peev xwm nqus ntawm Activated Carbon (feem ntau, lub peev xwm nqus ntawm cov tshuaj yaj hauv ...

Hauv kev xaus, cov saum toj no yog cov kev cai ntawm granulation, piling thiab txau nyob rau hauv lub kub pawg leaching txheej txheem. Cov txheej txheem kub leaching yog dav siv vim nws cov txheej txheem yooj yim, cov cuab yeej siv tsawg thiab tus nqi qis. Hauv kev tsim khoom tiag tiag, kuv cov tswv yuav tsum tau them sai sai rau kev tswj hwm qhov tsis sib xws ntawm txhua qhov txuas kom ntseeg tau cov txiaj ntsig zoo leaching.