What causes damage to the ladle breathable brick?

In the process of using ladle air-permeable bricks in steel factories, the main reasons for the damage of air-permeable bricks are thermal stress, mechanical stress, mechanical abrasion, and chemical erosion.

Bata sing bisa ditembus udara kasusun saka rong bagean: inti sing bisa dirawat ing udara lan bata kursi sing bisa ditembus kanthi udara. Nalika gas ing ngisor iki diuripake, permukaan kerja inti sing bisa ditembus kanthi udara bakal langsung ngubungi baja cair suhu tinggi. Amarga jumlah panggunaan saya mundhak, amarga panas lan adhem sing cepet banget, mula erosi inti bata ventilasi luwih jero, lan gampang ngasilake retakan.

Lumahing bata saka bata sing bisa ditembus ing ngisor iki ana ing kontak langsung karo baja cair suhu tinggi, lan suhu ing lumahing non-kerja relatif kurang. Volume bata sing teles ing udara lan bahan tahan panas ing sacedhake owah-owahan amarga owah-owahan suhu sajrone proses daur ulang gabung baja, tuang, lan ndandani panas. Owah-owahan volume, amarga ana gradien suhu lan bedane koefisien ekspansi termal ing antarane lapisan metamorf lan lapisan asli, tingkat volume pangowahan saka permukaan batu bata ventilasi menyang permukaan sing ora digunakake mboko sithik, sing bakal nyebabake nyukur bata sing duwe ventilasi. Gaya geser nyebabake bata ventilasi duwe retak ing arah melintang, lan ing kasus sing parah, bata ventilasi bakal pecah ing arah melintang.

During the tapping process, the molten steel will have a high-strength scouring of the bottom of the ladle, which will accelerate the erosion of the air-permeable brick. When the upper surface of the breathable brick is higher than the bottom of the bag, it will be sheared and washed by the flow of molten steel. The part higher than the bottom of the bag will generally be washed away after one use. In addition, after refining, if the valve is quickly closed, the reverse impact of molten steel will also accelerate the corrosion of the ventilating brick.

Lumahing inti inti bata sing bisa ditembus bisa kontak karo slag baja lan baja cair suwene. Slag baja lan baja cair ngemot oksida besi, oksida ferro, oksida mangan, oksida magnesium, silikon oksida, lan liya-liyane, dene komponen bata sing bisa ditembus udara kalebu alumina, silikon oksida, lsp. Bakal menehi reaksi kanggo ngasilake bahan leleh (kayata FeO · Al2O3, 2 (MnO) · SiO2 · Al2O3, lsp) banjur dicuci.