Piliki alumina kiʻekiʻe (T-19)

Inā ʻoi aku ka nui o ka Al2O3 ma mua o 90%, ua kapa ʻia ʻo corundum brick. Ma muli o nā kumuwaiwai like ʻole, ʻaʻole kūlike nā kūlana o nā ʻāina like ʻole. No ka laʻana, ʻōlelo ʻia nā ʻāina ʻEulopa ʻo ka palena haʻahaʻa o ka ʻike Al2O3 no nā refractory kiʻekiʻe-alumina he 42%. Ma Kina, pili pinepine nā pōhaku alumina kiʻekiʻe i nā pōhaku lepo refractory me ka Al2O3 ʻoi aku ma mua o 48%. Hana ʻia lākou i ka bauxite kūlohelohe kiʻekiʻe, aia nā minerale e like me ka diaspore, bomerite, kaolinite, etc. hana ʻia, hoʻomaloʻo ʻia a hoʻopau ʻia. ʻO ka refractoriness o nā pōhaku alumina kiʻekiʻe ma kahi o 1770 ℃, a ʻo ka mahana hoʻoluʻu haʻahaʻa he 1420 ℃-1550 ℃. ʻO nā pōhaku lepo alumina kiʻekiʻe maʻamau he LZ-80, LZ-75, LZ-65, LZ-55, LZ-48, a me nā mea'ē aʻe. ka umu ahi, ka umu hoʻopāpā a me ke kapuahi rotary. Eia kekahi, hoʻohana nui ʻia nā pōhaku alumina kiʻekiʻe e like me nā pōhaku nānā mālama wela open-hearth, plugs no ka ninini ʻana i nā ʻōnaehana, nā pōhaku nozzle, etc.