What is the difference between clay bricks and three-level high alumina bricks?

Kusiyanitsa kwakukulu pakati pa njerwa zadothi ndi njerwa za aluminiyamu ndizambiri zotayidwa komanso kuchuluka kwake.

Njerwa zokhala ndi 40-48% zotayidwa ndi njerwa zadongo. Njerwa zadongo zimakhala ndi zisonyezo zosiyanasiyana za N-1, N-2, N-3, ndi N-4 pamiyeso yadziko. Popanga ndi kugwiritsira ntchito, njerwa zadothi za N-2, N- 3 zimagwiritsidwa ntchito kwambiri, komanso ndizomwe zimapangidwa ndi opanga ambiri. Kuchuluka kwa voliyumu kuli pakati pa 2.1-2.15. Pankhani ya njerwa zadothi za N-1, zisonyezo zina ndizokwera kuposa njerwa zazitali za alumina.

Bricks with 55% aluminum content are third-grade high-alumina bricks with a bulk density between 2.15-2.25. At present, due to the production area and raw materials, the aluminum content of clay bricks is about 56%. The aluminum content of the clay bricks in Xinmi, Henan is about 56%, and the body density is above 2.15, which is basically a third-grade high-alumina brick. Moreover, the firing temperature is high, and the chemical index is not lower than the third-grade high alumina brick, but there is a difference in the softening temperature of the load.

The aluminum content of the three-level high alumina bricks currently produced is about 63%, and some have 65%. The body density is above 2.25, and the load softening temperature is slightly lower. In terms of chemical indicators, it is only different from the second grade high alumina bricks in unit weight and load softening temperature.

Maonekedwe a njerwa zadothi komanso njerwa za kalasi yachitatu adali osiyana. Njerwa zadothi ndizofiyira-chikasu, ndipo njerwa zachitatu-alumina zapamwamba zimakhala zoyera komanso zachikasu.

Pali kusiyana pakati pa kulemera pakati pa njerwa zadothi ndi kalasi lachitatu njerwa zapamwamba za alumina. Njerwa zadothi zomwezo ndizopepuka kuposa njerwa zitatu zapamwamba za alumina. Kutentha kotentha kumakhalanso kotsika ndi 20-30 ° C.

Njerwa zadothi ndi magalasi atatu apamwamba a njerwa za alumina zimakhala ndi mphamvu pakukakamira komanso kutentha kwakanthawi kochepa. Mphamvu yothina ya njerwa zadothi ndi 40Mpa, pomwe mphamvu yothina ya kalasi lachitatu njerwa za alumina ndi 50Mpa. Katundu wofewa wa njerwa zadothi nawonso ndiwokwera kuposa gulu lachitatu. Refractoriness ya njerwa ya aluminium ndi 30-40 ℃, ndipo mawonekedwe ake amakhala pafupifupi 30 ℃ kutsika.