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 anu telap dina hawa diwangun ku dua bagian: inti anu tiasa ditembus dina hawa sareng bata korsi anu tiasa ditembus dina hawa. Nalika handap niupan gas dihurungkeun, permukaan anu dianggo inti-perméabel hawa bakal langsung ngahubungi baja cair suhu luhur. Salaku jumlah kali panggunaan ningkat, kusabab panas gancang sareng tiis anu ditampi, beuki jero érosi inti tina bata ventilasi bakal gampang, sareng gampang ngahasilkeun retakan.

Permukaan damel tina bata handap-permeabel handap aya hubungan langsung sareng baja dilebur suhu luhur, sareng suhu permukaan anu henteu dianggo relatif handap. Volume bata-permeabel bata sareng bahan tahan api caketna robih kumargi perubahan suhu nalika prosés daur ulang gabung baja, tuang, sareng perbaikan panas. Parobihan parobihan, kusabab ayana gradién suhu sareng bédana koefisien ékspansi termal antara lapisan metamorphic sareng lapisan aslina, tingkat volume parobihan tina permukaan batu bata ventilasi kana permukaan anu henteu dianggo laun-laun robih, anu bakal nyababkeun geser tina bata anu ngudar. Gaya geser nyababkeun bata ventilasi gaduh retakan dina arah transversal, sareng dina kasus anu parah, bata ventilasi bakal rusak dina arah transversal.

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.

Permukaan kerja tina inti bata anu tiasa ditembus dina udara ngahubungi baja sareng baja cair salami lami. Slag baja sareng waja cair ngandung oksida beusi, oksida ferro, oksida mangan, oksigén magnésium, silikon oksida, sareng sajabana, komponén bata-permeabel bata kalebet alumina, silikon oksida, sareng sajabana, Éta bakal ngaréaksikeun ngahasilkeun low- zat lebur (sapertos FeO · Al2O3, 2 (MnO) · SiO2 · Al2O3, jst) sareng dikumbah.