Dust formation in the arc heating of zinc-plated steel

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• 作者：A. A. Alpatova ; L. M. Simonyan ; N. Sh. Isakova
• 关键词：arc heating ; zinc ; evaporation ; zinc ; plated steel ; structure ; particles ; composition ; phases
• 刊名：Steel in Translation
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：46
• 期：5
• 页码：303-308
• 全文大小：4,726 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Russian Library of Science
  
• 出版者：Allerton Press, Inc. distributed exclusively by Springer Science+Business Media LLC
• ISSN：1935-0988
• 卷排序：46

文摘

Dust formation in the plasma-arc heating of zinc-plated steel in argon is studied, when the current is 170–190 A, the argon flow rate is 0.06 m3/h, and the pressure in the furnace chamber is 0.1 MPa. Zinc evaporates practically completely in the first 30 s of heating. The structure of the trapped zinc-bearing dust is heterogeneous: the particles are of different shape (spherical, acicular, or membranous particles), different size, and different composition. The composition of individual dust particles is analyzed on an iCAP 6300 spectrometer (Thermo Electron, United States). On that basis, their oxide composition is estimated by means of Terra software. The dust includes particles consisting of ZnO, Fe₂O₄, carbon, and pure iron. The results indicate that, in the plasma heating of zinc-plated steel, the zinc-bearing dust may be captured separately from the other dust in the initial smelting period.