Nonlinear system identification of the reduction nickel oxide smelting process in electric arc furnace

[摘要] As the title implies the article describes the nonlinear system identification of the reduction smelting process of nickel oxide in electric arc furnaces. It is suggested that for operational control ratio of components of the charge must be solved the problem of determining the qualitative composition of the melt in real time. The use of 0thharmonic of phase voltage AC furnace as an indirect measure of the melt composition is proposed. Brief description of the mechanism of occurrence and nature of the non-zero 0thharmonic of the AC voltage of the arc is given. It is shown that value of 0thharmonic of the arc voltage is not function of electrical parameters but depends of the material composition of the melt. Processed industrial data are given. Hammerstein-Wiener model is used for description of the dependence of 0thharmonic of the furnace voltage from the technical parameters of melting furnace: the melt composition and current. Recommendations are given about the practical use of the model.

[发布机构] Candidate of Technical Sciences, Saint-Petersburg Mining University, Russia^1

[效力级别] 材料科学

[关键词] Electric arc furnace;Electrical parameter;Hammerstein-Wiener models;Indirect measure;Material compositions;Melt compositions;Operational control;Qualitative compositions