The amounts of oxygen and sulfur in liquid steel could be reduced by synthetic slag treatment during ld converter tapping, therefore, the quality of liquid steel was improved.

转炉出钢时对钢水进行合成渣处理，可以同时降低钢水中氧和硫的含量，综合提高钢水质量。

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The oxygen activity of converter molten steel directly influences the yield of alloy and quality of steel.

转炉钢水中的氧含量直接影响合金收得率和钢水的质量。

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The automatic pressure control of oxygen is an ideal strategy for steel making to ensure the quality. The author designed a pressure limited and interlock controller for oxygen blowing of converter.

氧压自动控制是保证转炉炼钢质量的理想方案，笔者设计了一套转炉吹氧压力限压及信号联锁控制器。

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