Dab tsi yog cov khoom ntawm cov cawv khov

Cov xwm txheej uas cuam tshuam rau kev ua haujlwm ntawm Cov Khoom Siv Hluav Taws Xob Roj Tank:

① Sib tov kub. Thaum qhov kub thiab txias heev, stearic acid tsis tuaj yeem yaj tag, yog li cov cawv tsis tuaj yeem tsim tawm. Qhov kub zoo tshaj plaws yog 60 degree. Ntawm 60 degree, ob txoj kev daws teeb meem tsis sib haum tam sim ntawd tom qab sib tov, yog li cov kev daws teeb meem tuaj yeem sib xyaw sib npaug. Tom qab sib tov, thaum lub sij hawm ntuj txias txheej txheem, cov cawv txuas ntxiv solidify, thiab thaum kawg tau ib tug uniform khoom cawv. Txawm hais tias cov khoom tsim tawm ntawm 70 degree kuj muaj qhov zoo nkauj, qhov kub thiab txias no yog ze rau qhov kub ntawm cov kua dej cawv, thiab cov cawv evaporates sai heev, yog li qhov ntsuas kub no tsis haum.

② Tus nqi ntawm stearic acid siv. Raws li tus nqi ntawm stearic acid nce, qhov kev ua tau zoo ntawm cov khoom siv tau zoo tuaj, qhov tshwm sim ntws thaum lub sij hawm combustion yog txo, thiab lub sij hawm hlawv yog txuas ntxiv. Txawm li cas los xij, raws li tus nqi ntawm stearic acid nce, qhov seem ntawm cov khoom seem tom qab combustion nce, thiab cov nqi ntawm cov khoom cawv nce ntxiv. Cov nyhuv zoo dua yog tias tus nqi ntawm stearic acid yog 6%.

③ Tus nqi ntawm alkali. Raws li tus nqi ntawm sodium hydroxide ntxiv nce, lub hardness ntawm cov khoom yuav ntau dua thiab cov nyhuv curing yuav zoo dua. Thaum tus nqi ntawm sodium hydroxide ntxiv tshaj 1.5%, lub sij hawm hlawv yuav luv luv. Qhov ntau alkali ntxiv, tus nqi siab dua thiab ntau dua qhov corrosiveness. Tsis tas li ntawd, qhov pom tseeb hlawv tsw qab yuav tshwm sim. Nws yog qhov zoo dua los tswj cov nyiaj sodium hydroxide ntawm 1.30%.

④ Kev cuam tshuam ntawm cov tshuaj ntxiv rau qhov zoo ntawm cov cawv. Cov nplaim dej cawv yog qhov tsis muaj xim thaum nws kub hnyiab, tab sis cov cawv cawv muaj cov nplaim daj vim yog qhov sib ntxiv ntawm sodium hydroxide. Yog tias 0.5% tooj liab nitrate ntxiv, ntau qhov ntsuas ntawm cov cawv cawv yog qhov tsis muaj kev cuam tshuam, tab sis cov nplaim taws tig xiav thaum hlawv. Cov ntsev sib txawv tuaj yeem raug xaiv thiab ntxiv rau cov cawv cawv kom tau cov nplaim ntawm cov xim sib txawv los ua kom muaj kev zoo nkauj ntawm kev sib xyaw.

⑤ Ua kom muaj yeeb yuj cawv. Los ntawm kev ntxiv cov xim rau cov khoom siv raw, cov khoom tsis muaj xim tsis muaj xim tuaj yeem ua kom muaj yeeb yuj, yog li ntxiv kev txaus siab. Cov xim tuaj yeem yog phenolphthalein, methyl txiv kab ntxwv, methyl liab, tooj liab nitrate, cobalt nitrate, barium chloride, thiab lwm yam.

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