He ʻano pōpopo lehu lele e lana ana ma ka ʻili wai.He keʻokeʻo hina, lahilahi a hakahaka ma ka paia, māmā loa i ke kaumaha, me ke kaumaha o 720kg/m3 (kaumaha) a me 418.8kg/m3 (māmā), ka nui o ka nui o kahi 0.1mm, pani a paʻa i ka ʻili, liʻiliʻi i loko. thermal conductivity, a me ke ahi pale ≥ 1610 ℃.ʻO ia kahi refractory mālama wela maikaʻi, hoʻohana nui ʻia i ka hana ʻana i nā castables māmā a me ka ʻaila ʻaila.ʻO ka hana kemika o ka pahu lana ka nui o ka silicon dioxide a me ka alumini oxide.He nui nā hiʻohiʻona, e like me nā ʻāpana maikaʻi, hollow, ke kaumaha māmā, ka ikaika kiʻekiʻe, ke kūpaʻa ʻana, ke kūpaʻa wela kiʻekiʻe, ka insulation thermal, insulation a me ka retardancy ahi.ʻO ia kekahi o nā mea maka i hoʻohana nui ʻia i ka ʻoihana pale ahi.

Hoʻolauna

Hana maikaʻi a me ka hoʻohana ʻana i nā lei lana

Kūleʻa ahi kiʻekiʻe.ʻO nā mea kemika nui o ka pahu lana he silika a me nā alumini oxides, kahi o ka silicon dioxide ma kahi o 48-66% a ʻo ka alumini oxide ma kahi o 26-36%.No ka mea he 1720 ℃ ka helu heheʻe o ka silicon dioxide a ʻo ka alumini oxide he 2060 ℃, he mau refractory kiʻekiʻe lāua.No laila, he pale ahi kiʻekiʻe loa ka pahu lana, a hiki i ka 1620-1800 ℃, e hana ana i kahi refractory kiʻekiʻe.ʻO ke kaumaha māmā, ka wela wela.ʻO ka paia o ka pahu e lana ana he lahilahi a hakahaka, a ʻo ka lua he semi vacuum.He liʻiliʻi loa ka nui o ke kinoea (N2, H2, CO2, etc.), a lohi loa ka lawe ʻana i ka wela.No laila, ʻaʻole māmā wale ke kaumaha o nā pahu lana (250-450 kg/m3).ʻO 1-250 microns ka nui o nā ʻāpana kūlohelohe o nā pahu lana.Hiki ke hoʻohana pololei ʻia nā lei drift me ka ʻole o ka wili ʻana.Hiki i ka fineness ke hoʻokō i nā pono o nā huahana like ʻole.ʻO nā mea hoʻoheheʻe wela māmā ʻē aʻe he nui ka nui o ka nui (e like me ka perlite).Inā wili ʻia lākou, e hoʻonui nui ʻia ka hiki, a e hoʻemi nui ʻia ka insulation thermal.Ma kēia ʻano, ʻoi aku ka maikaʻi o ka Drifting beads.ʻOi aku ka maikaʻi o ka pale uila.ʻO ka pahu lana ma hope o ke koho ʻia ʻana o ka peʻa magnetic he mea hoʻolalelale me ka hana maikaʻi loa a ʻaʻole hoʻokele uila.ʻO ka mea maʻamau, e emi ana ke kūpaʻa o nā insulators me ka piʻi ʻana o ka mahana, aʻo ka piʻi ʻana o nā pahu lana me ka piʻi ʻana o ka mahana.ʻAʻole loaʻa kēia pono i nā mea insulating ʻē aʻe.No laila, hiki ke hoʻohana ʻia e hana i nā huahana insulating ma lalo o nā kūlana wela kiʻekiʻe.