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.

Isitini esivuleka ngumoya sinezingxenye ezimbili: isitini esingenelwa ngumoya kanye nesitini esihlala umoya. Lapho kuvulwa igesi ephansi, indawo yokusebenza yomgogodla ovunyelwe emoyeni izothinta ngqo insimbi encibilikiswe ekushiseni okuphezulu. Njengoba inani lezikhathi zokusetshenziswa landa, ngenxa yokushisa okusheshayo nokubandayo elikutholayo, kuya ngokujula ukuguguleka komgogodla wesitini esingena umoya, futhi kulula ukukhiqiza imifantu.

Ubuso obusebenzayo besitini esinciphisa umoya phansi buxhumana ngqo nensimbi encibilikisiwe esezingeni eliphezulu, futhi izinga lokushisa lendawo engasebenzi lincane kakhulu. Umthamo wezitini ezivumela umoya nezinto ezisetshenziswayo eziseduze ziyashintsha ngenxa yezinguquko zokushisa ngesikhathi senqubo yokuphinda kusetshenziswe insimbi ukujoyina, ukuthulula nokulungisa okushisayo. Ukushintshwa kwevolumu, ngenxa yokuba khona kwe-gradient yezinga lokushisa nokwehluka kokulingana kokushisa okushisayo phakathi kongqimba lwe-metamorphic kanye nongqimba wokuqala, izinga lokushintsha kwevolumu lisuka ebusweni bokusebenza kwesitini esingena umoya liye endaweni engasebenzi lishintsha kancane kancane, okuzobangela ukugundwa kwesitini esingena umoya. Amandla we-shear abangela ukuthi isitini esingenisa umoya sibe nemifantu ohlangothini olunqamulelayo, futhi ezimweni ezinzima, isitini esingena umoya sizongena ohlangothini olunqamulelayo.

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.

Ubuso obusebenzayo besizinda sezitini esingena ngaphakathi emoyeni buxhumana nensimbi yensimbi nensimbi encibilikisiwe isikhathi eside. Insimbi yensimbi nensimbi encibilikisiwe iqukethe i-iron oxide, i-ferrous oxide, i-manganese oxide, i-magnesium oxide, i-silicon oxide, njll. izinto ezincibilikayo (ezifana ne-FeO · Al2O3, 2 (MnO) · SiO2 · Al2O3, njll.) futhi zikhukhulwe.