Siliceous refractories feem ntau yog tsim los ntawm silica. Feem ntau cov ntsiab lus silica tsis tsawg dua 93 feem pua. Yuav kho los yog amorphous refractory. Lub ntsiab ntau yam yog silicon cib. Cov theem tseem ceeb ntawm silicon cib hloov mus rau hauv squamous quartz, quarteite thiab iav los ntawm sintering ntawm 1350 ~ 1 430 degree nrog silica li raw khoom. Qhov tseeb qhov ceev yuav tsum yog 2.31 ~ 2.42 grams ib cubic centimeter. Nws muaj qhov zoo ntawm cov thermal conductivity, siab softening point nyob rau hauv load thiab muaj zog corrosion kuj rau acid slag.
Cov khoom siv siliceous yog cov khoom siv acid refractory, muaj zog tiv thaiv cov kua qaub khib nyiab, tab sis yooj yim rau eroded los ntawm alkaline slag, yooj yim rau kev puas tsuaj los ntawm poov tshuaj oxide, sodium oxide thiab lwm yam oxides, tab sis muaj kev tiv thaiv zoo rau ferrous oxide, hlau oxide thiab lwm yam. oxides. Cov silicon cib ib txwm muaj cov yam ntxwv ntawm qhov kub thiab txias deformation nyob rau hauv load, thiab nws softening kub nyob rau hauv load yog ze rau lub melting point ntawm phosphorus quartz thiab cristalite (1670 degree, 1713 degree). Silicon cib masonry muaj huab cua nruj zoo thiab lub zog muaj zog, tab sis nws qhov tsis zoo tshaj plaws yog qhov tsis tshua muaj thermal shock stability. Silicon cib feem ntau yog siv hauv coke ncu, iav melting kilns, acid steelmaking furnaces thiab lwm yam khoom siv thermal cov khoom siv.
Cov khoom siv raw siv hauv kev ua silicon cib suav nrog cov ntaub ntawv tseem ceeb, cov ntaub ntawv thiab cov khoom siv mineralizing, thiab lwm yam. Cov khoom tseem ceeb ntawm silicon cib yog quartz. Muaj ntau ntau hom quartz nyob rau hauv qhov xwm txheej, los ntawm cov siv lead ua lub xeev ntawm flint nrog cryptocrystalline mus rau qhov zoo tshaj plaws siv lead ua siv lead ua, thiab lwm yam., ob hom ntawm cov ntaub ntawv tsis zoo no tsis haum, yog vim li cas nyob rau hauv cov txheej txheem ntawm calcination, thaum qhov kub thiab txias. quartz mus rau ntau yam kub kub hloov pauv hloov pauv lossis hloov pauv sai sai (xws li flint), lossis kev hloov pauv tshwj xeeb qeeb (xws li siv lead ua), qhov tsim nyog tshaj plaws rau kev tsim cov silica cib refractories yog colloidal quartzite lossis loj quartzite. Tsis tas li ntawd, cov khoom siv hluav taws xob raug rho tawm hauv cov txheej txheem ntawm silicon cib kuj tseem tuaj yeem siv los ua cov khoom siv raw, uas tuaj yeem txo qhov hluav taws xob nthuav dav ntawm lub cib thiab txo cov khoom pov tseg. Txawm li cas los xij, qhov sib ntxiv ntawm cov khib nyiab khib nyiab yuav txo cov refractoriness thiab mechanical zog ntawm cov khoom thiab ua kom cov porosity, yog li cov nyiaj khib nyiab feem ntau yog tswj hauv qab 20 feem pua.
Cov khoom sib txuas hauv kev tsim cov silicon cib yog cov txiv qaub thiab cov organic bonding agents. Txiv qaub yog ntxiv rau lub billet nyob rau hauv daim ntawv ntawm txiv qaub mis nyuj, uas combines nrog quartz hais nyob rau hauv lub billet kom lub zog ntawm lub billet tom qab ziab. Cov feem ntau siv cov organic binder yog sulfite pulp pov tseg, uas yog siv los txhim kho lub plasticity ntawm lub billet thiab lub zog ntawm lub cib tom qab ziab. Lwm lub luag haujlwm ntawm txiv qaub yog ua lub luag haujlwm ntawm cov neeg sawv cev ntawm cov ntxhia hauv kev tua hluav taws los txhawb kev hloov pauv ntawm quartz. Tsis tas li ntawd, kuj tseem muaj cov hlau dov (hlau phosphorus), ca rauv slag, sulfuric acid slag, pyrolusite thiab lwm yam mineralizing agents.
