Silicon Brick yog Acid Refractory khoom
Silicon cib yog cov khoom siv acid refractory, nrog rau kev tiv thaiv zoo rau cov kua qaub slag yaig, load softening kub txog li 1640 ~ 1670 degree, lub sij hawm siv sij hawm ntev yog qhov ruaj khov ntawm qhov kub thiab txias.
Cov ntxhia theem muaj pes tsawg leeg ntawm silicon cib feem ntau yog squamous quartz thiab cristobalite, thiab me me ntawm quartz thiab vitreous. Lub thermal stability ntawm silicon cib ntawm qhov kub thiab txias yog qhov tsis zoo vim qhov hloov pauv ntawm cov khoom siv lead ua thiab cov ntim ntawm squamite, cristobalite thiab residual quartz. Thaum siv, nws yuav tsum maj mam ua kom sov thiab txias hauv qab 800 degree C kom tsis txhob tawg. Yog li ntawd, nws tsis tsim nyog siv rau hauv qhov cub nrog qhov kub thiab txias hloov qis dua 800 degree C.
Cov khoom thiab cov txheej txheem ntawm silicon cib yog ze ze rau kev hloov pauv crystalline ntawm SiO2, yog li qhov tseeb lub ntiajteb txawj nqus yog qhov tseem ceeb ntawm cov khoom siv silicon cib. Qhov kev xav tau dav dav yog qis dua 2.38, thiab qhov zoo ntawm silicon cib yuav tsum qis dua 2.35. Qhov tseeb lub ntiajteb txawj nqus yog me me, xav txog qhov ntau ntawm squamoid quartz thiab cristobalite nyob rau hauv lub cib, tus nqi ntawm residual quartz yog me me, yog li cov residual linear expansion yog me me, thiab lub zog poob ntawm kev siv kuj yog me me. Muaj xya crystalline thiab ib qho amorphous variants ntawm silica. Cov kev hloov no tuaj yeem muab faib ua ob pawg: thawj hom kev hloov pauv yog quartz, squamous quartz thiab cristobalite, lawv cov qauv siv lead ua sib txawv heev, thiab kev sib hloov ntawm ib leeg qeeb heev; Qhov thib ob hom variant yog cov subspecies ntawm qhov sib txawv saum toj no, thiab -hom, uas zoo sib xws hauv cov qauv thiab hloov pauv sai ntawm ib qho mus rau lwm qhov. Hauv txoj kev xav, lawv txoj kev sib hloov pauv kev sib raug zoo yog pom nyob rau hauv daim duab "Transformation Relationship of silica variants".
Cov khoom siv raw rau kev ua silicon bricks yog silica. Qhov siab dua SiO2 cov ntsiab lus ntawm silica raw khoom, qhov siab dua qhov refractoriness. Cov impurities uas phem tshaj plaws yog Al2O3, K2O, Na2O, thiab lwm yam, uas txo cov refractoriness ntawm refractory khoom. Silica cib nrog SiO2 cov ntsiab lus tsis tsawg tshaj li 96% silica raws li raw cov ntaub ntawv, ntxiv mineralizing agents (xws li hlau scale, txiv qaub mis nyuj) thiab bonding agents (xws li molasses, sulfite pulp pov tseg kua), los ntawm kev sib tov, molding, ziab, hlawv. thiab lwm yam txheej txheem los tsim.