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在金属熔体真空处理时,由于压力降低而引起的反应,对熔体起着精炼作用.属于这类过程的有:1、按2H_(Me)={H_2}反应式以降低熔体镜面上气体分压力的办法从金属中除去溶解在其中的气体.2、取决于压力的加速化学反应,例如,在钢水中碳按C_(Me)+O_(Me)={CO}反应式氧化成为一氧化碳.3、蒸气压超过被精炼金属蒸气压的各元素被馏出,例如,钠按Na_(Me)={N_2}反应式馏出.
In the vacuum treatment of metal melt, due to the pressure drop caused by the reaction, plays a refining role on the melt. There are such processes are: 1, according to 2H_ (Me) = {H_2} reaction to reduce the melt mirror Gas partial pressure to remove the gas dissolved in the metal .2, depending on the pressure of the accelerated chemical reaction, for example, in the molten steel by C_ (Me) + O_ (Me) = {CO} reactive oxidation of carbon monoxide .3, each element whose vapor pressure exceeds the vapor pressure of the refined metal is distilled out, for example, sodium is reacted by Na Me (Me) = {N 2}.