Qhov teeb meem ntawm cracking ntawmrefractory pob zebyog ib qho teeb meem nyuaj, tab sis ntau yam muaj feem cuam tshuam nrog, suav nrog cov txheej txheem tsim khoom, cov khoom siv raw, thiab cov ntaub ntawv sib khi. Lub ntsiab yog vim li cas muaj feem xyuam rau lub ci ceev.
Lub matrix ntawm refractory pob zeb nyob rau hauv Tuam Tshoj tam sim no mas muaj SiO2 thiab Al2O3 raw cov ntaub ntawv, thiab cov binder yog mas aluminosilicate cement ntawm ceev ceev- hardening thiab ntxov- zog hom. Yog li ntawd, nws yuav tsum tau hais tias lub refractory mortar muaj txaus curing lub sij hawm tom qab kev tsim kho thiab ib tug tsim nyog ci nkhaus.
Rau qhov teeb meem ntawm kev tawg ntawm cov pob zeb refractory, ua ntej, 0.1%-0.3% ntawm cov organic tawg- cov ntaub ntawv pov thawj yuav tsum tau ntxiv rau hauv cov txheej txheem tsim khoom los tiv thaiv qhov tshwm sim ntawm kev tawg ntawm cov tshuaj khib nyiab refractory. Vim tias qhov tawg-pov thawj fibers yuav yaj ntawm 160℃thiab tsim ib txoj kev, uas muaj peev xwm sib npaug ntawm cov nplua thiab nqaim pores ntawm refractory mortar, yog li ua kom cov permeability ntawm refractory mortar thiab accelerating lub tso pa thiab buffering cov dej vapor siab, tiv thaiv qhov tawg ntawm refractory pob zeb los ntawm suden ba kub hloov.
Lwm qhov laj thawj rau kev tawg ntawmrefractory pob zebyog tias thaum lub sij hawm ci, vim qhov kub nce ceev, cov dej dawb hauv cov khib nyiab refractory hloov los ntawm cov kua rau cov roj hauv ib lub sij hawm luv luv, thiab tsim ib qho vapor siab thaum lub ci kub nce. Thaum cov dej vapor nyob rau hauv lub refractory mortar tsis tuaj yeem tawg sai sai thiab tshem tawm, nws ua rau muaj kev nce siab ntawm cov khoom siv lub cev. Thaum qhov sib npaug ntawm cov dej vapor siab hauv cov khoom siv lub cev poob, cov tshuaj khib nyiab refractory yuav tev tawm, flake tawm, thiab tawg.
Tsis tas li ntawd, thaum lub sij hawm tsim kho, qhov cua qhov yuav tsum tau khaws cia kom ntseeg tau tiasrefractory pob zebtxhob tawg. Nws yog qhov zoo tshaj plaws los siv xyoob sticks nrog ib txoj kab uas hla ntawm 3 hli kom tawm hauv qhov cua, nrog 100 qhov ib square meter. Thaum lub sij hawm ci, qhov kub yuav tsum tsis txhob nce sai heev. Qhov kub nce qis dua 150℃yuav tsum tsis txhob siab tshaj 10 degree, thiab lub sijhawm ci ua ntej 350℃yuav tsum ntev li ntev tau.