西宁钢厂发生一起由于空气/污氮气预换热器泄漏导致的制氧机停机事故，介绍了故障经过，详细分析了事故原因，提出了处理措施。%A breakdown of the oxygen generator caused by leakage in the air/waste-ni-trogen pre-heat exchanger happened in Xining Steel. The whole course of the accident was introduced, causes of the accident were analyzed in detail and treatment measures were also put forward.
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