Taw qhia txog kev paub zinc, hlau zinc synthesized li cas?
Zinc yog ib qho tshuaj lom neeg. Nws cov cim tshuaj yog Zn, thiab nws tus lej atomic yog 30. Nws yog nyob rau hauv lub sijhawm plaub thiab pawg ⅡB ntawm lub sij hawm ntawm cov ntsiab lus tshuaj. Zinc yog lub teeb grey hloov pauv hlau thiab plaub "hom" hlau. Nyob rau hauv niaj hnub kev lag luam, zinc yog irreplaceable nyob rau hauv lub roj teeb tsim thiab yog ib tug tseem ceeb heev hlau. Tsis tas li ntawd, zinc kuj yog ib qho tseem ceeb ntawm cov kab mob rau tib neeg lub cev thiab ua lub luag haujlwm tseem ceeb heev.
Zinc nyuaj rau hlawv hauv huab cua thiab emits lub teeb dawb muaj zog hauv oxygen. Muaj ib txheej ntawm zinc oxide nyob rau saum npoo ntawm zinc, uas tawm cov pa luam yeeb dawb thaum nws hlawv. Lub ntsiab tseem ceeb ntawm cov pa luam yeeb dawb yog zinc oxide, uas tsis tsuas yog thaiv cov zinc hlawv, tab sis kuj tseem cuam tshuam cov xim ntawm cov nplaim taws los ua lub teeb daj. Zinc yog yooj yim soluble hauv acid thiab tuaj yeem hloov tau yooj yim kub, nyiaj, tooj liab, thiab lwm yam. Cov oxide zaj duab xis ntawm zinc muaj qhov siab melting point, tab sis lub melting point ntawm metallic zinc yog tsawg heev. Yog li cua sov cov zinc flakes ntawm lub teeb cawv yuav yaj thiab muag cov zinc flakes, tab sis tsis poob, meej vim yog cov nyhuv ntawm oxide zaj duab xis. Zinc feem ntau yog siv rau hauv steel, metallurgy, machinery, hluav taws xob, tshuaj, lub teeb kev lag luam, tub rog thiab kws tshuaj.
daws kev daws teeb meem:
1. Nqus 360g ntawm cov hlau zinc thiab maj mam ntxiv rau 3340ml ntawm 15% sulfuric acid tov, thiab kub rau 70 ° C rau cov tshuaj tiv thaiv. Thaum H2 tsis dhau lawm, dilute nrog 1200ml dej los npaj cov zinc sulfate tov, tshem tawm 50ml, thiab siv cov so rau tom qab siv. 4g ntawm sodium carbonate tau ntxiv rau 50ml ntawm cov tshuaj diluted, thiab precipitated zinc carbonate precipitate tau ntxuav peb zaug nrog dej (300ml txhua zaus) rau kev siv. Dissolve 7.5 g ntawm ferrous sulfate heptahydrate nyob rau hauv 500 ml ntawm dej, acidify nrog 1 ml ntawm superior qib ntshiab sulfuric acid, tshav kub, thiab ntxiv 30% hydrogen peroxide dropwise mus hloov tag nrho cov Fe2 + ions nyob rau hauv cov tshuaj rau Fe3+ ions. Ntxiv cov tshuaj npaj hlau sulfate rau saum toj no-hais spare zinc sulfate tov, thiab ntxiv cov npaj zinc carbonate precipitate nrog nplawm, ces kub rau 30-40ºC nyob rau hauv ceev stirring, thiab cia nws sawv. Tom qab cov tshuaj tau meej meej, lim nws. [Kev tshem tawm ntawm Fe(OH)3 precipitates nrog As, P, Sb thiab lwm yam impurities]. Cov lim dej yog electrolyzed thiab PH tus nqi raug kho kom Congo liab me ntsis xiav. Thaum lub sij hawm electrolysis, siv qib premium ntshiab los yog zinc flakes li cathode, muaj zinc raws li anode, qhov kev ncua deb ntawm ob electrodes yog 2-3cm, qhov voltage ntawm ob electrodes yog 6V, thiab tam sim no ceev nyob ntawm qhov kub ntawm cov electrolyte. Tom qab 200g ntawm zinc yog precipitated, lub electrolyte yuav tsum tau kho dua nrog hlau sulfate thiab zinc carbonate raws li cov saum toj no txoj kev.
2. Kev npaj zinc yog npaj los ntawm smelting zinc blende ZnS ua cov khoom tseem ceeb. Industrially, ZnS feem ntau yog oxidized thiab calcined rau hauv oxide nrog zoo reactivity. Tom qab ntawd siv txoj kev txo thermal thiab electrolysis los npaj zinc. Tus nqi ua los ntawm zinc roasting block thiab thee hmoov yog muab tso rau hauv zinc smelting rauv ntawm 1300 ~ 1350 ° C rau cov tshuaj tiv thaiv, cov hlau zinc vapor generated los ntawm kev txo cov tshuaj tiv thaiv yog kis mus rau hauv zinc condenser los ntawm cov kav dej, thiab cov hlau zinc raug ntes. Cov hlau zinc tau los ntawm txoj kev no muaj cov ntsiab lus siab impurity. Yuav kom tau txais cov zinc purer, lub tshuab nqus tsev distillation yog yuav tsum tau.
3. Dissolve zinc oxide nyob rau hauv cov khoom siv calcined nrog sulfuric acid, tshem tawm cov hlau los ntawm oxidation, tshem tawm cobalt, tooj liab, npib tsib xee thiab lwm yam impurities nrog zinc hmoov, ces muab tso rau hauv ib tug electrolytic cell nrog txhuas raws li lub anode thiab txhuas phaj raws li cathode. Thaum lub sij hawm electrolysis, metallic zinc yog tso rau ntawm aluminium phaj thiab tev tawm los ua ib yam khoom. Lub purity ntawm hlau zinc ua los ntawm electrolysis tuaj yeem ncav cuag 99.99%.
Xav paub ntau ntxiv Link:https://www.wanmetal.com/
Qhov chaw: Internet
Disclaimer: Cov ntaub ntawv muaj nyob rau hauv tsab xov xwm no tsuas yog siv rau kev siv xwb, tsis yog kev txiav txim siab ncaj qha. Yog tias koj tsis xav ua txhaum koj txoj cai lij choj, thov hu rau peb raws sijhawm.
Post lub sij hawm: Sep-06-2021