High alumina cib yog ib hom refractory cib khoom tsim los ntawm bauxite li raw khoom, feem ntau yog tsim los ntawm AL2O3 raws li lub ntsiab siv lead ua daim ntawv. Nws yog tsim los ntawm kev xaiv cov ntaub ntawv, batching, ua ntsuab lub cev, thiab high-temperature sintering ntawm 1550 degree thiab 1700 degree.
Cov tshuaj lom neeg muaj pes tsawg leeg thiab lub cev muaj zog ntawm bauxite, raws li cov khoom siv raw rau siab alumina cib, sib txawv heev vim nws cov colloidal sib tov ntawm hlau uas muaj tshuaj thiab txhuas hydroxide nyob rau hauv thaum ntxov theem ntawm kev tsim cov ore qauv.
Puas yog cov mis molecular ntawm monohydrate alumina Al2O3? H2O yog ib qho dawb flake zoo li rhombic siv lead ua nrog ib tug hardness ntawm 7 thiab ib tug ceev ntawm 3.5g / cm3. Lub ntsiab ntxhia ntawm Suav bauxite yog sib xyaw ntawm diaspore thiab kaolinite. Lwm cov ntxhia hauv nruab nrab suav nrog boehmite, dickite, aluminite, rutile, thiab hlau uas muaj cov ntxhia, feem ntau muaj Al2O3 cov ntsiab lus siab thiab cov ntsiab lus Fe2O3 tsawg, uas ua rau txo qis ntawm 14% hauv qhov hluav taws kub. Cov ore yog ib qho nyuaj heev thiab tsis yooj yim tawg.
Puas yog cov mis molecular ntawm alumina Al2O3? 3H2O, uas yog ntau tshaj nyob rau hauv crystallization tshaj monohydrate alumina. Feem ntau tsim cov blocky nodules nrog cov hla ntu thiab qhov ntom ntawm 2.4g / cm3. Muaj cua sov shrinkage zoo ib yam li cov pob av nplaum. Ntshiab alumina muaj ib tug melting point ntawm 2035 degree thiab kuj yog ib tug zoo refractory raw khoom.
[Qhia qee qhov kev paub txog kev ua haujlwm ntawm porosity ntawm siab alumina cib]
Dab tsi yog qhov porosity ntawm siab alumina cib? Qhov pom meej porosity ntawm siab alumina cib tseem hu ua qhib porosity. Qhov feem pua ntawm qhov ntim ntawm qhib pores hauv cov khoom refractory rau tag nrho cov ntim ntawm cov khoom. Tshwj tsis yog tias tau teev tseg, qhov porosity xa mus rau hauv Suav refractory kev lag luam feem ntau yog hais txog qhov pom tseeb porosity.
Qhov pom tseeb porosity yog qhov taw qhia tseem ceeb rau kev ntsuas qhov zoo ntawm cov khoom siv raw khoom lossis cov khoom lag luam, uas tsis tsuas yog cuam tshuam qhov ntom ntawm cov ntaub ntawv refractory, tab sis kuj qhia txog seb lawv cov txheej txheem tsim khoom puas tsim nyog. Tsuas yog cov khoom siv refractory sib sib zog nqus, cov khoom siv tsis tshua muaj porosity los yog cov khoom muaj txiaj ntsig zoo rau kev txhim kho cov khoom zoo, txhim kho cov neeg kho tshuab lub zog, txo qhov chaw ntawm qhov chaw hauv kev sib cuag nrog slag, thiab txhim kho kev pab cuam lub neej.
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