Yuav Thov Li Cas Kev Sib Txuas Kev Sib Txuas Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Electroplating Tank Fais Fab

Yuav Thov Li Cas Kev Sib Txuas Kev Sib Txuas Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Electroplating Tank Fais Fab

49. Yuav ua li cas tshem carbonate los ntawm cyanide plating tov?

Teb: Cov hau kev tshem tawm cov carbonates los ntawm cov tshuaj cyanide plating muaj xws li: (1) Txoj kev txias - thaum txias cov tshuaj cyanide plating, sodium carbonate tuaj yeem crystallize ntawm cov tshuaj thiab muab tshem tawm. Qhov txias txias yuav tsum nyob ib ncig ntawm 0 degree, thiab lub sij hawm yuav tsum ntau tshaj 8 teev. Thaum lub caij ntuj no, Free cooling tuaj yeem siv tau. Los ntawm kev siv txoj kev txias, qhov poob ntawm cov ntsev hlau yog li 10 feem pua. Txoj kev ua kom txias tsis haum rau kev tshem tawm cov poov tshuaj carbonate vim tias solubility ntawm poov tshuaj ntsev yog siab. (2) Kev siv tshuaj los nag - Calcium sulfate, calcium hydroxide, barium hydroxide, thiab lwm yam tuaj yeem siv tau, thiab lawv cov tshuaj tiv thaiv yog raws li nram no: CaSO4 plus Na2CO3 → CaCO3 ↓ plus Na2SO4Ca (OH) 2 plus Na2CO3 → CaCO3 ↓ plus 2NaOHBa ( ) 2 plus Na2CO3 → BaCO3 ↓ plus 2NaOH. Sodium sulfate tuaj yeem siv rau precipitate sodium carbonate rau hauv calcium carbonate, thiab cov calcium sulfate generated muaj teeb meem tsawg dua sodium carbonate. Nyob rau hauv tartrate cyanide plating tov, muaj cov sulfate ions muaj txiaj ntsig, thiab sulfate kuj tuaj yeem raug tshem tawm los ntawm txoj kev txias, Txoj kev no tuaj yeem tshem tawm cov poov tshuaj carbonate. Qhov kom zoo dua ntawm kev siv calcium hydroxide los yog barium hydroxide yog cov sodium hydroxide uas tsim tom qab cov tshuaj tiv thaiv yuav tsum tau ua nyob rau hauv cov kev daws teeb meem. Hauv cov xwm txheej uas tsis tas yuav muaj alkali, kev kho tsis zoo ntawm anode electrolysis lossis ntxiv cov organic acids (xws li tartaric acid) tuaj yeem siv tom qab kho. (3) Kev kho cov kua qaub - lub hauv paus ntsiab lus ntawm kev siv cov kua qaub rau cov tshuaj carbonate los ua CO2 roj; Cov kua qaub siv rau 2H ntxiv rau Na2CO3 → 2Na ntxiv rau H2O ntxiv rau CO2 ↑ yog tartaric acid, thiab cov tartrate generated yog qhov zoo. Daim ntawv thov ntawm txoj kev no yuav tsum muaj cov cuab yeej ua pa zoo. (4) Dilution method - Txoj kev no yog dilute cov tshuaj kom txo cov concentration ntawm carbonates, uas yuav ua rau poob ntawm ib feem ntawm cov tshuaj thiab yuav tsum tsuas yog siv nyob rau hauv unavoidable xwm txheej.

Dab tsi ntawm kev ua haujlwm tsis zoo tuaj yeem tshwm sim los ntawm ntau cov carbonate hauv cyanide plating tov.

Teb: Thaum muaj cov carbonate ntau dhau hauv cov tshuaj cyanide plating, nws tuaj yeem ua rau muaj qhov tsis zoo hauv qab no: (1) Ua kom muaj zog anodic polarization. (2) Lub cathode efficiency txo. (3) Cov conductivity ntawm cov tshuaj txo qis. (4) Txo gloss ntau yam. (5) Cov txheej yog yooj yim rau kev nkag mus. (6) Cov txheej yog yooj yim spongy (tshwj xeeb tshaj yog nyob rau hauv kub los yog nyiaj plating daws). (7) Lub viscosity ntawm cov tshuaj nce, ua rau kom poob ntau ntxiv.

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