Cov khoom siv thermal rwb thaiv tsev yog cov khoom siv nrog cov qauv ntxeem tau, uas muaj cov yam ntxwv ntawm qhov ntim tsawg, siab porosity, thiab thermal conductivity tsawg, thiab tuaj yeem thaiv qhov hloov ntawm cov cua sov. Txawm li cas los xij, nws lub zog tsis siab, thiab nws cov corrosion kuj tsis zoo. Nws feem ntau yog siv rau hauv cov qauv uas tsis yog-load-bearing xws li cov khaubncaws sab nraud povtseg thiab thermal rwb thaiv tsev txheej lossis qhov chaw uas tsis muaj kev sib cuag nrog kev daws teeb meem. Cov ntaub ntawv thermal rwb thaiv tsev yog thawj zaug tau thov los ntawm qee lub tebchaws hauv Tebchaws Meskas thiab Western Europe. Cov kev tshawb fawb tau pom tias cov khoom siv no tuaj yeem txhim kho qhov kev siv ntawm lub zog ntawm cov cua sov thiab txo cov cua sov. Yog li ntawd, nws tau nce sai, thiab kev tshawb fawb kev txaus siab rau nws kuj tseem nce ntxiv.
1. Hydrophobic thermal rwb thaiv tsev khoom
Cov khoom siv thermal rwb thaiv tsev yog cov khoom siv nrog cov qauv ntxeem tau. Vim muaj cov txheej txheem kev npaj sib txawv, nws qhov pores tuaj yeem muab faib ua peb hom: kev sib txuas pores, ib nrab kaw qhov pores thiab kaw qhov pores. Cov pores nyob rau hauv feem ntau cov ntaub ntawv yog kev cob cog rua thiab semi-kaw, thiab muaj ob peb kaw pores. Txuas qhov pores thiab ib nrab kaw qhov pores yog ib qho yooj yim los tsim capillary nkag thiab nqus dej, ua rau cov dej noo hauv cov khoom siv rwb thaiv tsev, uas nyuaj rau tshem tawm. Txawm li cas los xij, cov thermal conductivity ntawm dej ntawm qhov kub ib txwm yog 23 npaug ntawm huab cua, thiab cov thermal rwb thaiv tsev ua haujlwm ntawm cov khoom siv thermal rwb thaiv tsev yuav txo qis heev tom qab nqus dej, thiab nws kuj tseem tsim kev puas tsuaj rau cov khoom nws tus kheej. Tam sim no, feem ntau cov ntaub ntawv rwb thaiv tsev kub tsis yog hydrophobic. Txhawm rau tiv thaiv cov ntaub ntawv rwb thaiv tsev los ntawm kev ntub dej, lawv feem ntau ntim tshwj xeeb, uas ua rau tsis pom kev nce nqi. Yuav ua li cas cov khoom siv nws tus kheej hydrophobic tau dhau los ua kev tshawb fawb tshiab ntawm cov ntaub ntawv thermal rwb thaiv tsev.
2. Ib puag ncig tus phooj ywg thermal rwb thaiv tsev cov ntaub ntawv
Nrog rau kev paub txog kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig, cov kev xav tau siab dua tau muab tso rau pem hauv ntej rau cov khoom siv hluav taws xob hluav taws xob. Txawm hais tias yuav tsum muaj kev ua tau zoo tshaj plaws, nws tseem yuav tsum tau ua kom tsis txhob muaj kev puas tsuaj rau tib neeg lub cev thiab ib puag ncig. Environmentally friendly refractory cov ntaub ntawv yog npaj nyob rau hauv lub keeb kwm yav dhau no, uas yuav tsum tau hais tias cov ntaub ntawv refractory yuav tsis tsim carcinogens thiab tshuaj lom neeg uas ua rau muaj kev puas tsuaj rau ib puag ncig thiab tib neeg lub cev thaum lub sij hawm tsim thiab siv cov txheej txheem.
Piv txwv li, cov khoom siv magnesia-chromium yog siv los ua cov khoom tseem ceeb tshaj plaws nyob rau hauv qhov chaw tua hluav taws ntawm cov cement rotary kiln thiab tooj liab smelting kev lag luam. Txawm hais tias nws muaj kev ua tau zoo ntawm txhua yam, hauv kev siv qhov project, Cr3 ntxiv tau hloov mus rau Cr6 ntxiv, thiab Cr6 ntxiv yog tshuaj lom thiab soluble hauv dej. Nws yuav ua rau muaj kev puas tsuaj rau tib neeg lub cev, thiab nws tseem yuav ua rau muaj kuab paug ib puag ncig thiab dej hauv av. Txhawm rau daws qhov teeb meem no, Nyiv tau kawm txog kev siv MgO-TiO2-Al2O3 raw khoom los hloov cov khoom siv magnesium-chromium. Kev ua tau zoo ntawm cov khoom siv no yog piv rau cov khoom siv magnesium-chromium. Qhov piv tsis yog qhov qis dua, thiab nws muaj qhov tsim nyog pom tseeb porosity thiab zoo dua tiv thaiv slag yaig.
