Research articleThe chaotic characteristic of the carbon-monoxide utilization ratio in the blast furnace

- Carbon monoxide utilization ratio (CMUR) is proposed to be served as a real-time index to evaluate the energy consumption of blast furnace (BF).
- Use the power spectrum method to analyze the characteristic of CMUR qualitatively.
- Present a new chaotic analysis method to further study the characteristic of CMUR in BF.
- A numerical example to corroborate the existence of the chaotic characteristic of CMUR.

In this paper, carbon monoxide utilization ratio (CMUR) is served as a real-time index to evaluate the energy consumption of blast furnace (BF), and the chaotic analysis method is also presented to study the characteristic of CMUR. Firstly, the time series data measured from two representative BFs are adopted as the sample to investigate the characteristics of CMUR. Secondly, the phase space model of CMUR is reconstructed, and two key related parameters of the model are derived as well. Finally, the value of the chaotic attractor's saturated correlative dimensions in the reconstructed phase space of CMUR is obtained. The result shows that the sample time series of these two BFs have chaos property. Furthermore, the development process of CMUR is also proved to be the chaotic process. It provides a solid foundation for us to further study the chaotic predication and control of CMUR, which helps us to better master the variational tendency of CMUR and provides the effective operation guidance for the BF on the spot to reduce the energy consumption in BF.