The work principle and maintenance method of bottom gas-feeding brick in top-bottom duplicate blown converter are stated, it is proposed how to make the bricks synchronized with furnace life.

论述了顶底复吹转炉底部供气砖工作原理、维护方法，提出了如何操作才能使底部供气砖与炉龄同步的理论与具体措施。

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Alumina hollow ball is the hollow spherical light insulating refractory made from alumina blown out of electric furnace through high temperature melting procedure.

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。

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The Arcon is a recently developed combination of a top -blown oxygen converter and a DC arc furnace with a single electrode, which can alternate with the top oxygen lance.

电转炉是新近开发的将氧气顶吹转炉与直流电弧炉相结合的技术，其电极与顶吹氧枪可交替使用。

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