Vim li cas Tabular, Calcined thiab Reactive Alumina rau Refractories?

Thaum tsim tawm siab -kev ua tau zoo tsis zoo li cov refractories, tabular alumina, calcined alumina thiab reactive alumina yog peb feem ntau siv alumina- raws li cov ntaub ntawv. Lawv ua raws li lub cev pob txha, muab tub lim thiab cov khoom siv sintering, sib koom ua ke tswj xyuas cov thermal shock resistance, densification thiab corrosion resistance of castables los yog ramming mixes. Ib qho ntxiv me me ntawm mullite tuaj yeem ua kom zoo dua qhov siab -kub txhua yam cwj pwm.

Tabular alumina yog tsim los ntawm sai sai sintering siab -purity alumina saum 1900℃. Nws tsim cov phaj-zoo li cov muaju uas muaj ntau qhov kaw micropores thiab pom meej porosity tsawg heev. Cov qauv no muab siab refractoriness, zoo heev thermal shock kuj thiab creep kuj. Nyob rau hauv cov cheeb tsam uas muaj qhov kub thiab txias hloov pauv, xws li ladle cuam tshuam zones thiab cement rotary kiln outlets, tabular alumina aggregates tiv thaiv spalling zoo thaum tuav lub hauv ob sab phlu lub ntim stability.

Kub kub calcined alumina micro hmoov tau ua tiav alpha theem kev hloov pauv, nrog kev txhim kho siv lead ua tiav thiab kev ua haujlwm tsis tshua muaj tshuaj lom neeg. Nws yog tsuas yog siv los sau qhov khoob ntawm cov khoom ntxhib thiab txhim kho cov ntim ntim. Activated alumina micro hmoov yog tswj los ntawm qis-kub calcination kom khaws tau qhov chaw siab thiab qhov tshwm sim. Thaum qhov kub thiab txias, nws nyiam tsim lub caj dab sintering, txhawb cov matrix densification, txo cov sintering kub ntawm cov khoom, ho txhim kho lub zog ntawm chav tsev kub thiab nruab nrab kub, thiab txhim khu lub peev xwm los tiv thaiv slag nkag.

Nyob rau hauv cov mis ib txwm, phaj-zoo li corundum tsim ib qho kev sib sau ua ke, calcined alumina micro hmoov nyob rau hauv nruab nrab qhov khoob, thiab activated alumina micro hmoov muab sintering kev ua si, tsim ib tug nruj particle loj faib ntawm peb. Thaum ib qho me me ntawm mullite tau qhia, nws cov koob zoo li cov muaju yog tsim nyob rau hauv qhov chaw ntawm qhov kub thiab txias, uas tuaj yeem txhim kho cov thermal shock resistance thiab siab - kub flexural zog, thiab txo cov txheej txheem tev tawm los ntawm qhov kub thiab txias sib txawv. Ua tib zoo nkag siab txog cov yam ntxwv sib txawv ntawm cov khoom siv raw no muaj qhov tseem ceeb hauv engineering rau txuas lub neej ntawm kiln hauv ob sab phlu thiab txo kev noj cov khoom siv refractory ib tuj hlau.

Yog koj xav paub ntxiv txogtabular, calcined thiab reactive alumina, thov nias nws.