Cov txheej txheem tseem ceeb ntws rau kev rov ua kom tooj liab los ntawm electroplating sludge ntawm hluav taws xob cua sov raj

Cov txheej txheem tseem ceeb ntws rau kev rov ua kom tooj liab los ntawm electroplating sludge ntawm hluav taws xob cua sov raj

1.1.1 Copper leaching

Tom qab qee qhov kev kho mob ua ntej ntawm cov sludge, ammonia, sulfuric acid, lossis hlau sulfate yog siv los tshem cov tooj liab los ntawm cov sludge. Ammonia dej leaching muaj kev xaiv zoo, tab sis nws muaj cov ntxhiab tsw ntxhiab thiab xav tau kev sib khi siab ntawm cov khoom siv leaching. Thaum cov concentration ntawm NH3 ntau dua 18 feem pua, qhov volatilization ntawm ammonia dej yog qhov tseem ceeb, uas yuav ua rau poob ntawm ammonia dej thiab deterioration ntawm kev khiav hauj lwm ib puag ncig [4]; Sulfuric acid leaching [5,6] muaj lub sijhawm luv luv thiab ua haujlwm zoo dua, tab sis sulfuric acid muaj zog corrosiveness thiab siab yuav tsum tau rau reactor los tiv thaiv corrosion; Lub leaching efficiency ntawm hlau sulfate yog siab dua [7], tab sis cov tshuaj tiv thaiv lub sij hawm ntev dua, yog li yuav tsum tau ib tug loj reactor ntim. Kev xaiv ntawm txoj kev leaching yuav tsum tau txiav txim siab raws li cov khoom ntawm cov sludge.

1.1.2 Kev sib cais thiab purification ntawm tooj liab hauv leaching tov

Siv ntau yam thev naus laus zis los cais thiab rho tawm tooj liab los ntawm cov tshuaj leaching, yog li rov qab los ntawm cov hlau tooj liab lossis tooj liab ntsev.

1.2 Main recycling thiab siv technologies ntawm tooj liab

Raws li qib ntawm kev siv tooj liab, txoj hauv kev kho thiab siv dav siv electroplating tooj liab uas muaj sludge tuaj yeem muab faib ua peb pawg.

(1) Stabilize electroplating tooj liab uas muaj sludge kom txo nws cov kev puas tsuaj ib puag ncig yam tsis tau rov ua dua cov hlau tooj hauv nws. Txoj hauv kev tseem ceeb yog siv cov khoom ua kom khov kho kom ruaj khov thiab ruaj khov electroplating sludge, thiab tom qab ntawd nqa cov khoom pov tseg, reclamation lossis stacking kho.

(2) Txhawm rau kom siv tau cov electroplating tooj liab uas muaj cov sludge, cov txheej txheem kev kho mob tau txais los ua cov txheej txheem electroplating tooj liab uas muaj cov sludge rau hauv cov khoom siv xws li cov khoom siv hauv tsev, hloov cov yas, cov tshuaj tanning, thiab lwm yam. [8].

(3) Ntau yam kev kho lub cev thiab tshuaj siv tau los rho cov tooj liab los ntawm cov sludge thiab thaum kawg rov qab los ntawm cov hlau tooj liab lossis tooj liab ntsev, ua tiav kev siv cov khoom siv electroplating sludge.

2. Electroplating sludge peev txheej siv tshuab

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