The technology of out-of-furnace treatment is referred to pretreatment of hot metal and refining of molten steel.

炉外处理技术是铁水预处理和钢水精炼技术的总称。

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The elimination of inclusions from molten steel before casting into mould using ladle refining operation and tundish metallurgy is the key practice to obtain clean steel.

采用钢包精炼方法把夹杂物消灭在钢水进入结晶器之前是获得“干净”钢水的关键。

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It is shown that, for the refining of extra-low oxygen steel under low vacuum, blowing argon through porous plug into molten steel can effectively remove oxide inclusions from molten steel.

结果表明，在真空感应熔炼过程中，通过透气砖向熔池吹氩，可以实现在较低的真空度下熔炼超低氧钢，以及有效去除钢中的氧化物夹杂物颗粒。

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