The research of multi-modality control strategy of arc furnace electrode regulation
During the electric arc furnace work process, electrode arc lengths show strong random disturbs and lead to performance deterioration such as power consumption, product quality and electric network. Using a single control strategy can not satisfy the requirements of different work conditions. This paper bases on the experiences of experts, puts forward division measures of multi modality control strategy for different requirements to adjust to the smelting temperatures and power of different stages in steel making process. It identifies the feature motion state of the electric arc furnace on line, and then selects the optimal controller in different phases to deal with the problem. In this paper, multi-modality division, program implementation and algorithm model used in control strategy provide a theoretical basis and model reference for the optimal design of electric arc furnaces electrode regulator system.
Fused magnesia manufacturing process: a survey
This paper provides an overview of the manufacturing process of fused magnesia. A brief introduction to fused magnesia and its industrial production process are presented first. In order to meet the market requirements and reduce costs, fused magnesia industrial process begins to focus on these issues: high energy consumption, serious pollution, low utilization of raw materials. So the issues related to fused magnesia are reviewed. The literature work related to the fused magnesia manufacturing process is divided into four categories: modeling, optimization, control, and experimental constraints. As can be seen, with the continuous development of intelligent manufacturing technology, fused magnesia manufacturing process begins to emerge new opportunities. Research trends and opportunities are presented in the final section, with an emphasis on future potential intelligent technologies.
Mössbauer spectroscopy for determining phase stability in the ferrosilicon system
We present studies of phase dynamics of the silicon rich part of the Fe−Si system performed with Mössbauer spectroscopy. Standard spectra are obtained in very pure samples and these are applied to the studies of commercial 75& ferrosilicon. We find that the semistable high temperature alpha phase, known for considerable concentration of vacancies, needs multiple quadrupole doublets to fit the data. Finally it is shown how the Mössbauer effect can be applied to quality control in ferrosilicon production.