Zowoneka njerwa zapamwamba za alumina

Special-shaped high alumina brick grade three high alumina brick is a kind of refractory material, the main component of this refractory brick is Al2O3.

Ngati zomwe zili Al2O3 ndizokwera kuposa 90%, zimatchedwa njerwa ya corundum. Chifukwa cha zinthu zosiyanasiyana, miyezo yadziko siyogwirizana kwathunthu. Mwachitsanzo, mayiko aku Europe adakhazikitsa malire ochepera a Al2O3 okhalanso ndi ma alumina okwera pa 42%. Ku China, malinga ndi zomwe Al2O3 ili ndi njerwa zapamwamba za alumina, zimagawika m’magulu atatu: Gulu I──Al2O3 zili> 75%; Kalasi II──Al2O3 zili ndi 60 ～ 75%; Kalasi III──Al2O3 zili ndi 48 ～ 60%.

Njerwa zapamwamba za alumina

Zambiri Zamalonda

a. Kukonzanso

Kukonzanso kwa njerwa zapamwamba za alumina ndikokwera kuposa njerwa zadothi komanso njerwa za silika, mpaka 1750 ~ 1790 ℃, chomwe ndi chinthu chapamwamba kwambiri chosanja.

b. Katundu wofewetsa

Chifukwa mankhwala okhala ndi alumina okwera amakhala ndi Al2O3 yambiri, zosowa zochepa, komanso matayala ocheperako, kutentha komwe kumachepetsa kutentha kumakhala kwakukulu kuposa njerwa zadongo. Komabe, chifukwa makhiristo a mullite samapanga maukonde, kutentha kochepetsa kutentha sikukhala kofanana ndi njerwa za silika.

c. Kukaniza kwa slag

Njerwa zapamwamba za alumina zili ndi Al2O3 yambiri, yomwe ili pafupi ndi zida zotsalira, ndipo imatha kukana kukokoloka kwa slag acidic ndi slagine slag. Chifukwa cha kuphatikizidwa kwa SiO2, kuthekera kokana slag yamchere ndikofooka kuposa slag acidic.

Kugwiritsa Ntchito Zogulitsa

Amagwiritsidwa ntchito makamaka pakapangidwe kazitsulo zophulika, ng’anjo zotentha, nsonga zamagetsi zamagetsi, ng’anjo zophulika, ng’anjo zowotchera, ndi maiko ozungulira. Kuphatikiza apo, njerwa zapamwamba za alumina zimagwiritsidwanso ntchito ngati njerwa zotseguka zowotchera moto, mapulagi othandizira kuthira, njerwa zam’madzi, ndi zina zambiri. Komabe, mtengo wa njerwa zapamwamba za alumina ndiwokwera kuposa njerwa zadongo, chifukwa chake sikofunikira kugwiritsa ntchito njerwa zapamwamba za alumina pomwe njerwa zadothi zimatha kukwaniritsa zofunikira.