1. Kev sib cais ntawm nitric acid los rho tawm kub qhov kev sib cais ntawm nitric acid tuaj yeem siv, concentrated nitric acid rau hauv beakers, qhov xav tau los rho tawm kub rau hauv cov hlau rau hauv beakers. Lub Beaker ces muab tso rau ntawm lub beaker tuav thiab cua sov nrog lub teeb cawv kom tsim cov kub flaky.
2. Kev sib cais aqua regia ntxiv rau kev rho tawm kub, kev sib cais aqua regia yog siv. Tom qab sib tov ib feem nitric acid thiab peb feem hydrochloric acid rau hauv aqua regia, cov hlau uas xav tau rho tawm raug muab tso rau hauv aqua regia thiab lim tom qab cov hlau ua haujlwm tas. Tom qab ntawd nws raug cua sov thiab thaum kawg hloov nrog cov ntawv tooj liab, uas kuj tuaj yeem rho tawm ntawm kub.
3. Txoj kev sib cais H2SO4 sib tov H2SO4 thiab H2O4 hauv qhov sib piv ntawm ib mus rau ib, tom qab ntawd muab cov thev naus laus zis uas xav tau los ua kom zoo rau hauv cov tshuaj H2O4, thiab tos kom txog thaum kawg ntawm cov tshuaj tiv thaiv hlau, cov khoom xim daj yog kub.
Cov khoom siv raw ntawm kev rho kub yav dhau los, cov khoom siv raw ntawm kev rho kub feem ntau yog los ntawm cov hlau kub, cov hlau kub uas tau khawb los ntawm cov chaw khawb kub, uas kuj muaj lwm yam hlau muaj nqis. Raws li peb txhua tus paub, kub yog siv dav hauv cov khoom siv hluav taws xob, cov hniav nyiaj hniav kub, roj teeb, zaj duab xis kho mob, cov xov hlau, thiab lwm yam. Yog li tam sim no cov khib nyiab hluav taws xob, cov khib nyiab hniav nyiaj hniav kub kuj tuaj yeem ua kom kub thiab lwm yam hlau muaj nqis. Kev ua kom kub yog cov txheej txheem ntawm kev tshem tawm cov khoom tsis huv ntawm cov kub bullion lossis alloyed hauv cov khoom me me kom cov khoom kub ua tau raws li cov kev cai zoo ntawm cov qauv kev lag luam kub.
Thaum ua hmoov lossis flakes, siv tau Hasung lub tshuab ua hmoov hlau thiab lub tshuab ua flakes hlau rau lub hom phiaj ua kom kub. Tom qab ua tiav lawm, siv Hasung lub tshuab casting kub kom tau txais cov kub ci ntsa iab.
Lub sijhawm tshaj tawm: Lub Yim Hli-28-2023
