Abstract:
Based on arc generation technology to obtain a large area of uniform thermal plasma, it has the advantage of large size of high temperature region and good homogeneity of processing and reaction, which has broad application prospects in the fields of thermal spraying, micro and nano powder preparation, coal pyrolysis to produce acetylene, and so on. The paper reviews the research progress of large volume arc plasma technology and application at domestic and abroad, starting with application requirements. Firstly, various types of large volume arc plasma generators are introduced, including the multiphase AC, multi-electrode DC and magnetic driven rotating arc plasma generators, and the basic principle and characteristics are described for the large volume thermal plasma generation, respectively. Regarding arc control, the paper summarizes the control methods and mechanisms of plasma from the characteristics of the generator structure, including the aspects of electrode configuration, airflow driving, and magnetic field driving. Their effects are further discussed on plasma configuration, dynamic and flow characteristics. Finally, the application and research progress are introduced for the large-size arc plasma at home and abroad. In the view of pain point of arc plasma application, we need to further focus on key scientific and technological issues that urgently need to be addressed. The future development trend of arc plasma technology is prospected, which provides support for the application upgrade and the expansion of new fields of application.
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