Lub tshuab hluav taws xob sulfidation ntawm cov khoom siv tooj liab tsawg hauv cov dej acidic siv lub hauv paus ntsiab lus ntawm cov hlau pH txawv dej nag lossis cais cov hlau ions xws li hlau thiab txhuas hauv cov dej khib nyiab ua ntej kom huv tooj liab. Los ntawm kev ntxiv sulfide reagents, pH ntawm qhov kev tiv thaiv sulfidation yog tswj hwm kom muaj qhov tshwj xeeb ntawm tooj liab, thiab qib siab tooj liab ua kom muaj kev sib cais. Cov noob txiv cov laus uas muaj hnub nyoog ntxiv ua voj voog kom cov tshuaj tiv thaiv loj dua thiab ntom ntom thiab ua kom loog ntawm txoj kev loog. Txais yuav qhov kawg yooj yim nqus cov cuab yeej kom paub meej qhov rov ua dua tshiab ntawm leej faj reagent.
Txheej txheem txaus
Cov txheej txheem vulcanization feem ntau suav nrog ob ntu: cov txheej txheem tshem tawm hlau thiab txheej txheem hlau rov qab. Cov txheej txheem tshem tawm cov hlau siv acidic khib nyiab ua cov khoom siv raw, thiab ntxiv rau calcium carbide slag rau cov kua qaub ua acidic. Qhov ntau ntawm cov ferric ions nyob hauv cov kua dej acidic raug tshem tawm hauv daim ntawv ntawm hlau hydroxide nag; cov txheej txheem hlau rov qab siv cov dej tsis muaj hlau thiab sodium hydrosulfide Cov tshuaj tiv thaiv nyob rau hauv lub pas dej sib chwv sib txuas ua rau tooj liab sulfide. Cov hlau sulfide raug sib cais hauv cov pas dej sulfide tuab, thiab cov tooj liab sulfide muaj zog yog lub cev qhuav dej kom tau txais cov sulfide mloog.
Cov ntsiab lus Tshwj Xeeb
Cov txheej txheem ntawm cov tshuaj sulfide sib xyaw ua ke tshuab kom rov zoo cov tooj liab hauv cov kua qaub pov tseg. Los ntawm cov ntawv thov kev lag luam, cov khoom siv tooj liab qis rau hauv cov kua qaub ua haujlwm cov dej khib nyiab tau zoo tau. Tus nqi tooj liab rov qab yog ntau dua 95%, tooj liab siab mloog qib yog ntau dua 35%, thiab tus nqi tooj liab rov qab rau ib tus nqi yog 20,000 yuan / ton, uas paub tseeb txog kev rov ua dua ntawm cov khoom muaj hlau zoo hauv cov dej khib nyiab, thiab cov tooj liab seem hauv cov kua qaub tso quav qis dua qis dua 0.5 mg / L.
Xyoo 2008, Dexing Copper Mine thov siv cov thev naus laus zis los ua cov tooj dag dej tooj cev, siv cov kua dej acid nrog cov ntsiab lus tooj liab ntawm 120 mg / L. Raws li xyoo 2011, tag nrho ntawm 22.71 lab tons ntawm cov dej muaj cov kua qaub kua qaub qis qis tau siv thoob plaws, thiab 2,875 tons ntawm tooj liab tau rov qab tau.
Hauv xyoo 2010, Dexing Copper Mine ua lub npib tsib xee thiab cobalt rov ua dua tshiab. Cov khoom siv rov ua dua tshiab siv cov ion pauv thiab sulfide sib xyaw tshuab kom rov zoo-siab (5 mg rau ib liter) nickel thiab cobalt hauv cov kua qaub, thiab kev rov ua haujlwm txhua xyoo ntawm nickel thiab cobalt yog ze li 40 tons. Cov thev naus laus zis no tau txais txiaj ntsig tsawg ntawm tooj liab, npib tsib xee, cobalt, zinc thiab lwm yam khoom siv hlau hauv cov dej acidic ntawm cov mines. Nws muaj qhov zoo ntawm kev siv hluav taws xob tsawg, kev siv tus nqi qis, kev khwv nyiaj ntau, thiab kev ua qias tuaj ib puag ncig tsawg. Nws muaj cov txiaj ntsig zoo ntawm nyiaj txiag thiab ib puag ncig thiab qhib kev tshiab rau cov lag luam tsuas. Cov ntsiab lus tau txais txiaj ntsig muaj cov txiaj ntsig zoo nce qib.
