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首页> 外文会议>Copper and Nickel / Extractive Metallurgy; Light Metals / Extractive Metallurgy >Oxygen Pressure Measurements and Reaction Mechanism in Copper-making Stage of a PS Converter
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Oxygen Pressure Measurements and Reaction Mechanism in Copper-making Stage of a PS Converter

机译：PS转炉制铜阶段的氧气压力测量及反应机理

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摘要

Disposable oxygen probes were applied to a PS copper converter to measure the change of oxygen pressure of molten phases, such as white metal and blister copper, during the copper-making stage. The probes were dipped into white metal through the converter's mouth in intermittent stoppage of the copper blow, or into white metal or blister copper through a tuyere during the blowing. Several measurements were also carried out for blister copper poured into a ladle to investigate the final oxygen pressure in the copper blow. Based on the obtained results, reaction mechanism of the copper-making stage in a PS converter has been deduced as follows. The copper-making stage may be classified into three substages. In the early substage where the tuyeres are completely contacted with white metal, direct oxidation of white metal by oxygen gas contained in the reaction air progresses in the vicinity of the tuyeres. In the intermediate substage where both phases of white metal and blister copper coexist in the converter and the reaction air is blown into the blister copper, oxygen in the reaction air and sulfur in the white metal get dissolved into the blister copper, and then mutual reaction between dissolved oxygen and sulfur proceeds in the bulk of the blister copper under the condition of P_(so_2)≒1 atm regardless of an actual SO_2 concentration in the converter waste gas.
机译：将一次性氧气探针应用于PS铜转换器，以测量制铜阶段中熔融相（例如白色金属和粗铜）的氧气压力变化。在间歇性停止吹铜时，将探头通过转换器的嘴浸入白色金属中，或者在吹气时通过风口将探针浸入白色金属或泡铜中。还对倒入钢包中的粗铜进行了一些测量，以研究吹铜中的最终氧气压力。基于所获得的结果，可以推断出PS转换器中的铜制造阶段的反应机理如下。制铜阶段可以分为三个子阶段。在风口与白金属完全接触的早期阶段，在风口附近，反应空气中所含的氧气直接氧化白色金属。在中间子阶段，转换器中同时存在白色金属和泡铜的两相，并且将反应空气吹入泡铜中，反应空气中的氧气和白色金属中的硫溶解到泡铜中，然后相互反应在P_（so_2）≒1 atm的条件下，无论是转化炉废气中的实际SO_2浓度如何，溶解的氧气和硫之间的关系都会在粗铜中发生。

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