氧化铝空心球是采用氧化铝在电弧炉内经高温熔融后吹出的空心球状轻质隔热耐火材料。
Alumina hollow ball is the hollow spherical light insulating refractory made from alumina blown out of electric furnace through high temperature melting procedure.
重点介绍了熔融还原和近终形连铸连轧技术的进展，并指出其在耐火材料应用上存在的某些问题。
Emphasis was placed on the development of smelting reduction and near-net-shape continuous casting and continuous rolling technologies. Their challenge to refractories was also shown in this paper.
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