SciELO - Scientific Electronic Library Online

 
vol.110 número12Implementation of the first commercial scale DC smelter for ferronickel production from low grade laterite ores-technology building blocks and lessons learnedTheoretical and practical aspects of Cr(VI) in the South African ferrochrome industry índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Journal of the Southern African Institute of Mining and Metallurgy

versão On-line ISSN 2411-9717

Resumo

REYNOLDS, Q.G.; JONES, R.T.  e  REDDY, B.D.. Mathematical and computational modelling of the dynamic behaviour of direct current plasma arcs. J. S. Afr. Inst. Min. Metall. [online]. 2010, vol.110, n.12, pp. 733-742. ISSN 2411-9717.

The problem of direct-current plasma arc behaviour, interaction, and dynamics is considered in the context of metallurgical DC arc furnace applications. Particular attention is paid to the transient flow behaviour of arc systems. A mathematical formulation of the physics used to describe the arc system is presented, and includes the spatial and temporal evolution of fluid flow, heat transfer, and electromagnetism. Based on this formulation, a numerical model is developed using a finite difference approach on a regular cartesian grid in both two and three dimensions, with a special focus on robust stability, high resolution modelling, and high performance. A collection of results produced using the numerical model to study pilot plant-scale furnaces is then presented. These address a range of process and design variables and their effect on the numerical model's results. Where possible, the qualitative behaviour of the model is compared to available experimental data. A number of novel effects and phenomena are seen in the dynamic behaviour of the DC plasma arc model for both single and multiple arc systems, which may lead to improved understanding, control, and manipulation of such systems where they occur in industrial applications.

Palavras-chave : Pyrometallurgy; direct-current furnace; plasma arc; modelling.

        · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License