He aha nā pōhaku Magnesia Alumina Spinel? He alakaʻi piha no nā mea hoʻohana ʻoihana

I nā kaʻina hana ʻoihana kiʻekiʻe e like me ka hana sima, ka hana kila, a me ka hana aniani, he mea koʻikoʻi nā mea refractory no ka paʻa o ka hana a me ka kaohi ʻana i nā kumukūʻai.Nā pōhaku spinel magnesia alumina, kahi koho kiʻekiʻe no nā mea hoʻohana ʻoihana ma ka honua holoʻokoʻa, kū i waho me ke kūpaʻa wela kupaianaha, ke kūpaʻa i ka pala, a me ka launa pū ʻana me ke kaiapuni.Ua wehewehe kēia alakaʻi i nā mea nui o nā piliki spinel magnesia alumina no kāu mau pono ʻoihana.

1. Ka wehewehe ʻana o nā pōhaku lepo Magnesia Alumina Spinel

ʻO nā piliki spinel magnesia alumina he mau mea refractory alkaline synthetic i haku ʻia me ka magnesium oxide maʻemaʻe kiʻekiʻe (MgO, 80%-92%) a me ka alumini oxide (Al₂O₃, 3%-14%). ʻO kā lākou mau ʻano crystalline nui—periclase a me ka magnesia-alumina spinel (MgO·Al₂O₃)—e hana i kahi ʻano paʻa ma o ka sintering wela kiʻekiʻe. Ma ke ʻano he koho ʻē aʻe ʻaʻohe chromium i nā refractories kuʻuna, pale nā ​​​​piliki spinel magnesia alumina i nā hoʻokuʻu chromium hexavalent ʻawahia, e kūlike piha ana me nā kūlana kaiapuni honua.

2. Nā Waiwai Koʻikoʻi o nā Piliki Spinel Magnesia Alumina

ʻO nā hiʻohiʻona koʻikoʻi o nā pōhaku spinel magnesia alumina:

• ① Kūlana paʻa haʻalulu wela maikaʻi loa, e kū ana i 12-20 mau pōʻaiapuni hoʻoluʻu wai ma 1100°C;
• ② Ke kūpaʻa kiʻekiʻe o ka mahana, me kahi kiko heheʻe o 2135°C a me ka refractoriness ma lalo o ke kaumaha >1700°C;
• ③ Kūʻē ikaika i ka pala a me ka slag e kūʻē i nā slags alkaline, nā kinoea acidic, a me nā metala alkali;
• ④ Ikaika kūkulu hilinaʻi, me ka nui o ka nui ≥2.90 g/cm³ a ​​me ka ikaika kuʻi anu ≥45 MPa.