Refractory bricks yog inorganic non-metallic cov ntaub ntawv nrog ib tug refractoriness ntawm tsis tsawg tshaj li 1580 degree. Lawv yog cov ntaub ntawv yooj yim rau cov cuab yeej siv hluav taws xob kub, cov khoom siv rau cov khoom siv thermal xws li masonry kilns, thiab rau kev tsim khoom ntawm cov thawv kub kub thiab cov khoom siv los yog rau lub hom phiaj tshwj xeeb. Cov khoom siv ua haujlwm. Kev ua tiav ntawm kev siv cov cib refractory nyob rau hauv qhov kev txiav txim siab kub yuav tsum muaj cov txheej txheem zoo, thermal zog, txhua yam khoom thiab kev ua tau zoo, uas yog, siab refractoriness, softening kub nyob rau hauv load, thermal shock kuj thiab tshuaj corrosion kuj. Nws tuaj yeem tiv taus ntau yam kev hloov pauv ntawm lub cev thiab tshuaj lom neeg thiab ua tau raws li cov khoom siv thermal thiab cov khoom siv.
Tom qab ntawd muaj lus nug, yog vim li cas thiaj li refractory cib tiv taus kub? Vim li cas lwm cov ntaub ntawv tsis tuaj yeem tiv taus qhov kub thiab txias? Nov yog rau koj:
1: Los ntawm kev txheeb xyuas raw khoom
Cov khoom siv raw siv hauv kev tsim cov cib refractory feem ntau yog cov khoom siv ntuj, xws li bauxite, silica, magnesite thiab lwm yam khoom siv raw tom qab ua tiav. Muaj peb hom refractory cib.
Thaum siv bauxite ua raw khoom los tsim aluminium-silicon refractory cib, nws lub ntsiab tivthaiv yog alumina, uas yog hydrated alumina muaj impurities. daws. Lub hom phiaj tseem ceeb yog rau txhuas smelting thiab ua cov ntaub ntawv refractory, vim hais tias lub refractoriness ntawm siab alumina bauxite clinker yog siab li 1780 degree, muaj zog tshuaj stability thiab zoo lub cev. Ultra-siab kub refractory cib fused zirconium corundum cib tuaj yeem tsim los ntawm purifying bauxite ntawm qhov kub thiab txias los tsim cov corundum lub ntsiab siv lead ua theem nrog alumina cov ntsiab lus ntau dua 90 feem pua.
Cov khoom siv raw rau kev ua siliceous refractory cib yog silica, thiab cov khoom tseem ceeb yog SiO2. Cov ntsiab lus siab dua, qhov siab dua qhov refractoriness. Qhov phem tshaj impurities yog AL2O3, K2Aw, Na2O, thiab lwm yam. Kev tsim cov silica bricks siv tej yam ntuj tso silica li raw khoom, ntxiv rau ib tug tsim nyog tus nqi ntawm mineralizer los txhawb kev hloov dua siab tshiab ntawm quartz nyob rau hauv ntsuab lub cev rau tridymite. Nws maj mam raug rho tawm haujlwm ntawm 1350 ~ 1430 degree hauv qhov chaw txo qis. Nws muaj qhov kub thiab txias zog. Lub softening kub nyob rau hauv load yog 1620 degree.
Magnesite yog cov khoom siv tseem ceeb rau kev ua magnesia refractory cib. Nws cov ntsiab lus tseem ceeb yog MgO, thiab magnesia muaj cov khoom siv hluav taws xob zoo. Nws tuaj yeem hloov mus rau hauv cov muaju los ntawm kev kub hnyiab ntawm qhov kub siab tshaj 1000 ° C, thiab nws tuaj yeem ua sintered magnesia thaum nws nce mus rau 1500-2000 degree C. Tom qab tau crushed rau ib qho me me los yog hmoov, nws tuaj yeem ua tau. rau hauv magnesia cib los yog magnesia ramming khoom. Alkaline refractory bricks muaj zog tiv thaiv alkaline slag, tab sis tsis tuaj yeem tiv taus qhov yaig ntawm acid slag. Lub refractoriness yog siab tshaj 2000 degree, tab sis nws softening point nyob rau hauv load tsuas yog 1500 degree, thiab thermal shock stability tsis zoo.
2: Nws belongs rau inorganic non-metallic cov ntaub ntawv
Inorganic non-metallic cov ntaub ntawv, organic polymer cov ntaub ntawv thiab cov ntaub ntawv hlau yog teev raws li peb cov ntaub ntawv loj. Cov yam ntxwv ntawm cov ntaub ntawv zoo tib yam inorganic hlau yog: siab compressive zog, siab hardness, kub tsis kam, corrosion kuj, thiab ceramics nyob rau hauv corrosion kuj, refractory cov ntaub ntawv nyob rau hauv Nws muaj cov yam ntxwv zoo heev nyob rau hauv tshav kub thiab tshav kub rwb thaiv tsev kev ua tau zoo, uas yog incomparable rau hlau. cov ntaub ntawv thiab cov ntaub ntawv polymer. Txawm li cas los xij, piv nrog cov ntaub ntawv hlau, nws muaj zog tawg tsawg thiab tsis muaj ductility. Piv nrog cov ntaub ntawv polymer, qhov ntom ntom yog loj dua thiab cov txheej txheem tsim khoom yog qhov nyuaj.
3: Kev tsim thiab sintering
Cov txheej txheem ntau lawm ntawm refractory bricks yog tsim cov khoom resistant rau kub kub tom qab cov txheej txheem ntawm ntxhia crushing - raw khoom sib tov - tshuab tsim - kub kub firing, thiab lub sintering kub ntawm lub ntsuab lub cev nyob rau hauv lub kub qhov cub qhov cub yuav siab dua. tshaj li ntawm cov khoom Lub softening kub nyob rau hauv load yog feem ntau siab tshaj 1500 degree rau sintering. Lub refractoriness yog siab tshaj 1770 degree. Kub kub kuj yog qhov zoo. Refractory bricks feem ntau yog siv rau hauv ob sab phlu ntawm kilns xws li steelmaking fais furnaces, iav melting furnaces, thiab cement rotary furnaces.
Cov ntsiab lus: Peb lub laj thawj yog vim li cas cov cib refractory tuaj yeem tiv taus qhov kub thiab txias yog raws li nram no: ① Cov khoom siv raw khoom siv hauv cov cib refractory muaj siab refractoriness. ② Raws li cov khoom siv tsis muaj tshuaj lom neeg tsis yog xim hlau, qib ntawm nws siv yog txiav txim siab los ntawm qib ntawm cov khoom siv raw. ③ Lub cev ua tiav yog raug kub siab tshaj 1500 degree hauv qhov kub kub qhov cub, yog li cov cib refractory tuaj yeem tiv taus qhov kub thiab txias thiab haum rau qhov kub kub hauv ob sab phlu.
