Daim ntawv thov tseem ceeb ntawm bismuth oxide (bismuth trioxide) hauv kev kho dej thiab zinc hydrometallurgy

Daim ntawv thov tseem ceeb ntawm bismuth oxide (bismuth trioxide) hauv kev kho dej thiab zinc hydrometallurgy
Kev phom sij ntawm chloride ions hauv dej feem ntau suav nrog plaub yam hauv qab no:
1. Kev cuam tshuam rau cov nroj tsuag thiab cov qoob loo loj hlob: Thaum qhov loj ntawm cov tshuaj chloride ion nyob rau hauv cov dej irrigation nce mus txog 142-355mg/L, qee cov qoob loo tsis tuaj yeem tsim cov protein, uas ua rau muaj kev puas tsuaj rau cov nroj tsuag thiab cov qoob loo. Thaum qhov loj ntawm cov tshuaj chloride ion ntau dua 355mg / L, feem ntau cov qoob loo thiab cov nroj tsuag yuav raug tshuaj lom tuag.
2. Corrosion: chloride ions nyob rau hauv cov kev daws teeb meem tuaj yeem ua rau cov zaj duab xis passivation ntawm cov hlau thiab alloy nto mus rau qhov sib txawv, ua rau intergranular corrosion, crevice corrosion, pitting corrosion, thiab lwm yam, cuam tshuam rau kev ua haujlwm ntawm cov khoom siv thiab ua rau muaj kev phom sij.
3. Toxicity: Thaum qhov concentration ntawm chloride hauv dej siab dua 100mg / L, tib neeg tuaj yeem raug tshuaj lom rau ntau qib tom qab noj mov, cuam tshuam rau cov metabolism hauv ib txwm. Thaum cov ntsiab lus chloride siab dua 8g / kg, cov kev ua haujlwm lom neeg, ntau haiv neeg thiab microbial cov qauv hauv cov av yuav hloov pauv loj. Thaum cov chloride ion nyob rau hauv dej siab tshaj 500mg / L, coob tus ntses yuav tuag.
4. Kev cuam tshuam rau lub neej ib txwm nyob ntawm lub tsev: thaum cov ntsiab lus chloride ion nyob rau hauv cov pob zeb loj, qhov cuab lub zog yuav corroded, uas yuav ua rau cov pob zeb nthuav dav thiab xoob, txo nws cov tshuaj tiv thaiv corrosion, hnav tsis kam thiab lub zog, thiab ua puas lub tsev qauv.
Cov phom sij ntawm chloride ion hauv zinc smelting feem ntau suav nrog cov hauv qab no:
1. Lub hav zoov ntawm chloride ion cuam tshuam rau cov txheej txheem ntawm zinc electrodeposition, uas tsis tsuas yog aggravates corrosion ntawm txhuas anode, tab sis kuj ua rau nws nyuaj rau sawb zinc thaum electrodeposition;
2. Qhov nce ntawm cov hlau lead anode zog noj kuj ua rau nce cov ntsiab lus ntawm cov hlau lead hauv cathode zinc; Qhov nce ntawm cov tshuaj chlorine saum lub tank electrode yuav ua rau kev ua haujlwm tsis zoo thiab cuam tshuam rau kev noj qab haus huv ntawm cov neeg ua haujlwm. Raws li cov txheej txheem yuav tsum tau, cov ntsiab lus chlorine ion nyob rau hauv cov tshuaj zinc thaum lub sij hawm electrolysis yuav tsum tau tswj hauv qab no 200mg / l kom ntseeg tau tias cov kev vam meej ntawm ntau lawm. Txwv tsis pub, nws yuav ua rau muaj kev cuam tshuam ntau rau zinc electrodeposition, uas yuav cuam tshuam rau kev ua haujlwm ntawm zinc electrodeposition thiab zoo ntawm zinc cov khoom.
Taw qhia rau cov txheej txheem tam sim no ntawm kev tshem cov chlorine ntawm cov dej khib nyiab los ntawm bismuth oxide
1. Txoj kev bismuth oxide yog ntxiv bismuth oxide reagent rau thawj cov tshuaj, thiab bismuth ion tsim nyob rau hauv acidic tej yam kev mob yuav hydrolyze bismuth ion thiab chloride ion los tsim bismuth oxychloride nag lossis daus uas nyuaj rau yaj hauv dej nyob rau hauv ib qho PH ntau, thiaj li tshem tawm chloride ions los ntawm cov tshuaj qub.
2. Nrog rau cov txheej txheem tshem tawm cov tshuaj chlorine no, bismuth oxide tuaj yeem siv rov ua kom huv, txuag nqi ntau lawm
Yog li yuav ua li cas siv bismuth oxide tshem tawm cov tshuaj chlorine hauv zinc hydrometallurgy? Tam sim no, peb yuav qhia txog cov txheej txheem ntawm kev tshem cov tshuaj chlorine hauv zinc hydrometallurgy ntawm theem no, suav nrog kev ntxuav alkali, tooj liab slag thiab ion pauv. Cov khoom siv hauv kev tsim khoom yog zinc oxide plua plav uas tsim los ntawm cov hlau lead smelting sab saum toj tshuab rauv. Cov ntsiab lus txhuas ntawm cov khoom siv yog qhov siab, ncav cuag li 40 feem pua. Ib feem ntawm fluorine thiab chlorine nyob rau hauv cov hmoov av muaj nyob rau hauv daim ntawv ntawm PbF2, PbCl2 thiab lwm yam insoluble tshuaj. Thaum sodium carbonate (los yog sodium hydroxide) siv rau alkaline ntxuav, tus nqi tshem tawm cov tshuaj chlorine tsuas yog ncav cuag li 30 feem pua, uas tsis ua tiav cov txiaj ntsig xav tau; Thaum tooj liab slag yog siv rau kev tshem tawm cov tshuaj chlorine, vim yog cov yam ntxwv ntawm cov khoom siv, zinc oxide plua plav yeej tsis muaj tooj liab, yog li ntau cov tooj liab sulfate thiab zinc hmoov yuav tsum tau ntxiv los tsim cov xwm txheej rau kev tshem tawm cov tshuaj chlorine los ntawm tooj liab slag, ua rau. nyob rau hauv siab chlorine tshem tawm cov nqi. Tsis tas li ntawd, thaum tooj liab slag raug xa rov qab rau kev siv, vim muaj cov yam ntxwv xws li kev cia ntev ntev thiab oxidation ntawm tooj liab slag, cov nyhuv ntawm chlorine tshem tawm los ntawm tooj liab slag rov qab yog tsis ruaj khov; Thaum siv ion pauv txoj kev tshem tawm cov tshuaj chlorine, tsuas yog 50 feem pua ​​​​ntawm cov tshuaj chlorine tuaj yeem raug tshem tawm. Vim tias cov ntsiab lus chlorine ntawm cov khoom no siab, txoj kev sib pauv ion tsis tuaj yeem ua tau raws li cov cai ntawm electrolytic zinc rau chlorine ion tshem tawm. Nyob rau tib lub sijhawm, kev rov tsim dua tshiab ntawm cov resin siv dej ntau thiab tsim cov dej khib nyiab ntau.
Cov yam ntxwv hauv qab no tuaj yeem ua tiav los ntawm kev siv bismuth oxide tshem tawm cov tshuaj chlorine
1. Cov txiaj ntsig ntawm kev tshem tawm cov tshuaj chlorine yog qhov ruaj khov, khaws cia li ntawm 80 feem pua.
2. Bismuth oxide tuaj yeem tshem tawm 30 feem pua ​​- 40 feem pua ​​​​ntawm fluorine thaum tshem cov tshuaj chlorine, uas muab cov kev mob zoo rau kev ua haujlwm ntawm electrolysis.
3. Lub ntsiab reagent noj Los ntawm kev xav ntawm kev lag luam daim ntawv thov, nyob rau hauv tus txheej txheem ntawm kev siv bismuth oxide tshem tawm cov tshuaj chlorine, chav tsev noj ntawm ib tuj zinc ntawm caustic soda yog 66kg / t, thiab chav tsev noj ntawm ib tuj zinc ntawm cov zinc carbonate yooj yim. yog 60kg/t, thiab chav tsev noj cov dej siv los ntxuav oxidation secrets yog 2m3/t. Cov reagent noj me me, cov dej khib nyiab tsim me me, thiab tsis muaj zinc poob. Bismuth oxide yog ib qho kev tawm tswv yim ib zaug thiab tuaj yeem siv tau ntev. Tom qab lub sijhawm ua haujlwm ntev, cov tshuaj chlorine tshem tawm tau poob qis, vim tias lwm yam impurities tshaj tus qauv. Tom qab cov txheej txheem tshem tawm impurity, nws tuaj yeem rov ua dua thiab muab tso rau hauv qhov system dua, thiab cov nyhuv tseem zoo.