Fluctuation characteristic of billet region gas consumption in reheating furnace based on energy apportionment model

To master the fluctuation characteristic of billet gas consumption in different regions of reheating furnace, a system analysis method about fluctuation degree of billet region gas consumption (BRGC) is put forward in accordance with energy apportionment model. And this system analysis method mainly includes: (i) The space division of reheating furnace; (ii) The simplification of energy apportionment model in reheating furnace; (iii) The classification of billet samples; (iv) The establishment of BRGC standard deviation (BRGCSD) analysis model. A case study shows that (i) the BRGC fluctuates greatly in low temperature area, and fluctuates smoothly in high temperature area; (ii) The volatility degree of BRGC is intensified because of the lower loading temperature; (iii) It is very reasonable that the residence time of billets is controlled in (3,4] and (4,5] range, and the average fluctuation degree is about 0.01 and 0.012 respectively; (iv) The fluctuation of BRGC is amplified in some regions because of mixed charging. The analysis results show that some measures can reduce the fluctuation of BRGC, such as the stable operation of tiny positive pressure, the control of production rhythm, the improvement of billet loading temperature, the optimization of loading plan.