ʻO ka mahana hana a me ka hoʻohana ʻana i nā pōhaku ahi insulating māmā maʻamau 2

3. ʻO nā pōhaku lepo pōʻalo alumina

ʻO kāna mau mea waiwai nui he mau pōlele alumina a me ka pauka alumini oxide, i hui pū ʻia me nā mea paʻa ʻē aʻe. A ua puhi ʻia ma kahi wela kiʻekiʻe o 1750 degere Celsius. No ka ultra-kiʻekiʻe wela ikehu-ola a me ka insulation mea.
Paʻa loa ia e hoʻohana i nā lewa like ʻole. Maikaʻi kūpono no nā noi i nā kiln wela kiʻekiʻe ma 1800 ℃. Hiki ke hoʻohana ʻia nā pōleʻa hollow e like me ka wela kiʻekiʻe a me ke kiʻekiʻe kiʻekiʻenā mea hoʻopihapiha hoʻonā wela, nā'āpana māmā no ke kiʻekiʻe kiʻekiʻe refractory concrete, kiʻekiʻe-mehana castable, etc. Ma muli o nā hōʻailona kino a me nā kemika, hoʻohana nui ʻia nā alumini hollow ball bricks i nā kiln kiʻekiʻe kiʻekiʻe a me nā mea wela kiʻekiʻe e like me ka petrochemical industry gasifiers, carbon black industry reaction furnaces, metallurgical industry induction furnaces, etc.