Xov xwm

Kev txhim kho xwm txheej ntawm cov txheej txheem ua vaj tsev

Tam sim no, cov pob zeb txhawb ntxiv yog cov qauv siv dav tshaj plaws hauv Suav teb, suav nrog feem ntau ntawm tag nrho. Nyob rau tib lub sijhawm, nws tseem yog thaj chaw uas muaj cov pob zeb tsim kho tshaj plaws hauv ntiaj teb. Cov khoom tsim tawm ntawm nws cov khoom siv raw khoom tseem ceeb tau nce mus txog 1.882 billion tons hauv xyoo 2010, suav txog li 70% ntawm lub ntiaj teb tag nrho cov zis.

Lub hauv paus ntsiab lus ua haujlwm ntawm kev ua vaj tsev

Qhov laj thawj vim li cas cov pob zeb txhawb nqa tuaj yeem ua haujlwm ua ke tau txiav txim siab los ntawm nws tus kheej cov khoom siv. Ua ntej tshaj, cov hlau hlau thiab cov pob zeb muaj kwv yees li tib coefficient ntawm kev nthuav dav cua sov, thiab qhov sib nrug ntawm cov hlau tuav thiab cov pob zeb me me ntawm qhov kub ib yam. Qhov thib ob, thaum cov pob zeb ua kom tawv tawv, muaj kev sib raug zoo ntawm cov cement thiab cov cuab yeej txhawb nqa, kom muaj kev nyuaj siab tuaj yeem hloov pauv tau zoo ntawm lawv; Feem ntau, cov nplaim ntawm qhov cuab yeej tseem ua tiav rau hauv qhov ntxhib thiab sib cais ntawm cov kab tav tav (hu ua rebar) txhawm rau txhim kho kev sib txuas ntawm cov pob zeb thiab txhawb nqa ntxiv; Thaum qhov no tseem tsis txaus los hloov qhov nro ntawm qhov txhawb nqa thiab ua vaj tse, qhov kawg ntawm qhov kev txhawb zog feem ntau yog khoov 180 degrees. Qhov thib peb, cov tshuaj alkaline hauv cov cement, xws li calcium hydroxide, potassium hydroxide thiab sodium hydroxide, muab ib puag ncig alkaline, uas tsim cov yeeb yaj kiab tiv thaiv tsis zoo rau ntawm qhov txhawb nqa, yog li nws nyuaj rau corrode ntau dua nyob hauv qhov nruab nrab thiab acidic ib puag ncig. Feem ntau hais lus, ib puag ncig nrog pH tus nqi siab dua 11 tuaj yeem tiv thaiv kev txhawb nqa los ntawm kev xeb; Thaum raug rau huab cua, tus nqi pH ntawm cov pob zeb txhawb nqa tau maj mam poob qis vim yog acidification ntawm carbon dioxide. Thaum nws qis dua 10, qhov kev txhawb zog yuav raug corroded. Yog li, nws yog qhov tsim nyog los xyuas kom cov tuab ntawm txheej txheej tiv thaiv thaum tsim kho.

Kev qhia tshwj xeeb thiab hom kev xaiv qhov cuab lub zog

Cov ntsiab lus ntawm kev txhawb zog hauv kev txhawb nqa pob zeb feem ntau yog me me, suav txij li 1% (feem ntau hauv kab teeb thiab pob zeb) mus rau 6% (feem ntau hauv kab). Qhov seem ntawm kev txhawb zog yog ncig. Txoj kab uas hla ntawm kev txhawb nqa hauv Tebchaws Meskas nce los ntawm 0.25 txog 1 nti, nce ntxiv 1/8 nti hauv txhua qib; Hauv Tebchaws Europe, los ntawm 8 txog 30 hli, nce ntxiv 2 hli ntawm txhua theem; Suav teb av loj tau muab faib ua 19 ntu los ntawm 3 txog 40 hli. Hauv Tebchaws Meskas, raws li cov ntsiab lus carbon hauv kev txhawb nqa, nws tau muab faib ua 40 steel thiab 60 steel. Cov tom kawg muaj cov ntsiab lus carbon ntau dua, muaj zog dua thiab nruj, tab sis nws nyuaj rau khoov. Hauv ib puag ncig muaj kuab paug, cov hlau tuav ua los ntawm electroplating, epoxy resin thiab stainless hlau kuj tseem siv.