1.Classified raws li seb lawv zoo li cas los yog tsis
Raws li cov duab ntawm cov khoom xa los ntawm lub Hoobkas tau muab faib ua cov khoom zoo li tus thiab cov khoom tsis zoo. Qhov twg hu ua bricks yog stereotyped khoom. Txhua yam castables, furnace muab tub lim, pounding khoom, hluav taws av nplaum, thiab lwm yam yog cov khoom tsis zoo li qub. Shaped products are divided into dense and heat-insulating type, refractory bricks belong to dense products, concrete is a shaped delivery products, but it is an unshaped product.
2. Raws li lub ntsiab siv lead ua theem acid, alkali xwm faib
(1) cov khoom siv acidic: cov khoom no rau quartz (SiO2) rau thawj theem, SiO2 yog ib qho acidic oxide, pab thiab thiaj li muaj npe. Silica cib yog cov khoom sawv cev ntawm cov khoom siv acidic; ib nrab-silica cib, alkali- tiv thaiv cib, acid- cov cib tiv taus hauv SiO2 cov ntsiab lus ntawm 60% mus rau 80%, yog ib nrab- cov ntaub ntawv acidic.
(2) alkaline material products: MgO, CaO main crystal phase, because MgO, CaO is alkaline earth oxide, so it is called alkaline refractories. Their high melting point, resistance to alkaline slag (C / S>2) erosion peev xwm muaj zog heev, belongs rau cov laus refractory cov ntaub ntawv, tab sis lawv yog ib qho yooj yim mus hydrate. Magnesium-chromium bricks, dolomite cib, olivine cib thiab lwm yam khoom, lub ntsiab lus suav tshuaj muaj pes tsawg leeg kuj yog MgO, CaO kuj belongs rau alkaline cov ntaub ntawv.
(3) Cov khoom siv nruab nrab: Al2O3, ZrO2 lub ntsiab siv lead ua theem, lawv cov cwj pwm tshuaj lom neeg sib txawv, thaum ntsib cov alkaline oxides qhia cov yam ntxwv acidic, xws li tiam MgO, Al2O3, Al2O3, ZrO2; ntsib nrog muaj zog acidic oxides thiab alkaline yam ntxwv. Xws li cov tiam ntawm av nplaum cib, siab alumina cib, mullite cib yog cov sawv cev ntawmnruab nrab cov ntaub ntawv.Zircon cov khoom kuj yog cov khoom nruab nrab.