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plasma torch |
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plasma torch [′plaz·mə ‚tȯrch] (engineering) A torch in which temperatures as high as 50,000°C are achieved by injecting a plasma gas tangentially into an electric arc formed between electrodes in a chamber; the resulting vortex of hot gases emerges at very high speed through a hole in the negative electrode, to form a jet for welding, spraying of molten metal, and cutting of hard rock or hard metals. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Plasma arc melting furnaces utilize an arc in a non-reactive gas as a heat source that is applied to the melting of reactive and refractory metals. The plasma arc can be changed from a negative polarity, which is used to initiate heating and melt fluxes, to a positive polarity plasma to enhance sulfur and oxygen removal and aid alloy recovery. and Professor Alex McLean, University of Toronto, were discussing plasma arc furnaces in McLean's office. |
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