Kev xaiv ntawm stirring ceev thiab cov tshuaj tiv thaiv lub sij hawm rau electroplating ntawm hluav taws xob cua sov raj

Kev xaiv ntawm stirring ceev thiab cov tshuaj tiv thaiv lub sij hawm rau electroplating ntawm hluav taws xob cua sov raj

Peb npaj yuav siv txoj kev txo qis coagulation co nag lossis daus los kho cov dej khib nyiab hauv chav kawm 2 ntxiv rau Table 1 (cov dej khib nyiab yog thawj zaug kho los ntawm cov txheej txheem nag lossis daus, nrog pH ntawm 9.25 thiab Cu2 ntxiv ntawm 4.96 mg / L). Tus neeg sawv cev txo qis yog qib qib ferrous sulfate, thiab flocculant yog polyacrylamide [5]. Tsuas yog nruj me ntsis tswj cov txheej txheem ntawm acidification ua raws li alkalization (pH ntawm 8-9), thiab do sai sai thaum acidification thiab maj mam thaum alkalization. Tom qab ib lub sij hawm ntawm cov tshuaj tiv thaiv sawv, tooj liab thiab lwm yam hlau hnyav tuaj yeem ua ke ua ntej thiab tshem tawm. Vim tias qhov zoo heev ntawm cov hlau hydroxide nag lossis daus thiab kev ua haujlwm tsis zoo ntawm lub cev qhuav dej, polyacrylamide tuaj yeem ntxiv los txhawb cov kua dej sib cais. Txoj kev no tuaj yeem ua rau cov tooj liab seem hauv cov dej ntws tau raws li tus qauv sai thiab kev lag luam zoo.

3 Kev sim cov txiaj ntsig thiab kev sib tham

3.1 Kev txiav txim siab pH

Ntxiv FeSO4 · 7H2O rau cov dej khib nyiab kom Fe2 ntxiv rau hauv cov dej khib nyiab 320 mg/L. Tswj cov pH kawg ntawm ib ncig ntawm 8.8, do sai sai rau 1 feeb, nrog kev sib tw ceev ntawm 120-140 r / min, thiab tom qab ntawd cia nws sawv ntsug rau acidification rau 15 feeb los tshawb xyuas cov nyhuv pH ntawm kev tshem tawm Cu2. ntxiv,

Kev xaiv ntawm stirring ceev thiab cov tshuaj tiv thaiv lub sij hawm

Thaum ntxiv ob lossis ntau dua reagents, tom qab cov reagent tam sim no tau nrawm nrawm, qhov thib ob thiab thib peb reagents yuav tsum tau nplawm tam sim ntawd, nrog lub sijhawm ntawm 0.5 mus rau 1 feeb. Tom qab tag nrho cov reagents ntxiv, ib qho qeeb stirring yuav tsum tau nqa tawm tib lub sij hawm, thiab qeeb stirring yuav tsum tau zam. Qhov kev sim qhia tau hais tias qhov ceev stirring ceev thaum lub sij hawm acidification yog 120-140 r / min, lub sij hawm stirring ceev yog 1 min, qeeb stirring ceev thaum alkalization yog 30-40 r / min, thiab lub sij hawm stirring qeeb yog 15 feeb.

Cov xwm txheej tseem ceeb rau kev kho cov dej khib nyiab nyuaj yog tswj cov acidic tej yam kev mob kom tag nrho dissociate complex, yog li lub sij hawm acidification cov tshuaj tiv thaiv muaj qee yam cuam tshuam rau cov tooj liab tshem tawm. Tswj cov tshuaj tiv thaiv pH ntawm 4.95 thiab 4.97, pH kawg ntawm 8.82 thiab 8.86, thiab Fe2 ntxiv ntawm 320 mg / L. Tshawb xyuas cov nyhuv ntawm acidification lub sij hawm ntawm tooj liab tshem tawm efficiency. Thaum lub sij hawm cov tshuaj tiv thaiv yog 5, 10, 15, thiab 20 raws li, cov seem Cu2 ntxiv rau hauv cov effluent yog<0.20 mg/L, and it is appropriate to choose 15 minutes.

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