Nneɛma a ɛma ɛyɛ hyew
Alumina birikisi a ɛkorɔn-wɔ ahoɔden a ɛkorɔn sen ogya dɔte birikisi anaa semi-silica birikisi, a ɛkɔ 1750–1790 digrii ; wɔkyekyɛ wɔn mu sɛ nneɛma a ɛyɛ hyew a ɛkorɔn-grade.
Refractoriness wɔ adesoa ase
Esiane wɔn Al2O3 dodow a ɛkɔ soro ne efĩ a ɛba fam-a ɛde ahwehwɛ a ɛyɛ mmerɛw a ɛnyɛ den-melting phases-alumina a ɛkorɔn-alumina nneɛma no da ahoɔden a ɛkorɔn adi wɔ adesoa ase sen ogya dɔte birikisi. Nanso esiane sɛ mullite ahwehwɛ no nnyɛ ntamadan a ɛka bom nti, sɛnea ɛyɛ den sɛ ɛbɛhyew wɔ adesoa ase no da so ara sua sen silica birikisi de.
Slag a ɛko tia
Esiane sɛ Al2O3 dɔɔso nti, alumina birikisi a ɛdɔɔso -yɛ n’ade te sɛ nneɛma a ɛnyɛ nea ɛyɛ hyew a ɛnyɛ nea ɛyɛ hyew na ebetumi ako atia nsu a asɛe denam acidic ne basic slags nyinaa so. Nanso, esiane SiO2 a ɛwɔ hɔ nti, sɛnea wɔko tia basic slag no yɛ mmerɛw kakra sen sɛnea wɔko tia acidic slag.