Numerical Analysis of Effects of Different Blast Parameters on the Gas and Burden Distribution Characteristics Inside Blast Furnace

Abstract

Blast parameters are easy to be changed and are often applied to control the gas distribution in blast furnace. However, the effects of blast parameters on the gas and solid distribution characteristics were seldom investigated. Therefore, a 3D model considering gas and solid fluid phases is developed and used to analyze effects of blast parameters on the gas and solid distributions in the blast furnace B of Baiyi Steel. The results show that the gas temperature increases a little in the lower part while decreases in the middle and top parts of blast furnace when the oxygen enrichment ratio and blast temperature increase. The CO utilization ratio increases with the increase of oxygen enrichment ratio, humidified blast amount and blast temperature, and it increases most for the case of blast temperature. The metallization ratio at the bottom of the blast furnace increases with the increase of oxygen enrichment ratio and humidified blast amount while it decreases with the increase of gas temperature.

A Comprehensive Review of Characterization Methods for Metallurgical Coke Structures

“…[ 10 , 11 , 12 , 13 , 14 ]. Oxygen-enriched blast technology is another well-used method to decrease the coke ratio by increasing the production rate of hot metal through enhancing the combustion intensity of coke and pulverized coal [ 15 , 16 ]. However, these methods result in higher requirements of coke quality, especially the coke strength.…”

A Novel Prediction Method for Blast Furnace Gas Utilization Rate Based on Dynamic Weighted Stacked Output‐Relevant Autoencoder

“…Over the last decades, many experts and scholars have been dedicated to the research for GUR; in general, these researches can be divided into two categories: mechanism‐driven [ 7–10 ] and data‐driven. [ 4,11–15 ] Mechanism‐driven methods have the advantage of strong interpretability, for instance, Kou et al [ 7 ] proposed a 3D mechanism model to analyze the effect of different blast parameters on the GUR. Xiang et al [ 8 ] combined the BF ironmaking mechanism with the actual production data and investigated the association of GUR with other production efficiency indicators.…”

“…However, BF is a typical black-box system that lacks direct and effective measuring means to understand the internal state of the furnace, [5,6] making accurately obtaining GUR in real-time is not easy.Over the last decades, many experts and scholars have been dedicated to the research for GUR; in general, these researches can be divided into two categories: mechanism-driven [7][8][9][10] and datadriven. [4,[11][12][13][14][15] Mechanism-driven methods have the advantage of strong interpretability, for instance, Kou et al [7] proposed a 3D mechanism model to analyze the effect of different blast parameters on the GUR. Xiang et al [8] combined the BF ironmaking mechanism with the actual production data and investigated the association of GUR with other production efficiency indicators.…”

“…Over the last decades, many experts and scholars have been dedicated to the research for GUR; in general, these researches can be divided into two categories: mechanism-driven [7][8][9][10] and datadriven. [4,[11][12][13][14][15] Mechanism-driven methods have the advantage of strong interpretability, for instance, Kou et al [7] proposed a 3D mechanism model to analyze the effect of different blast parameters on the GUR. Xiang et al [8] combined the BF ironmaking mechanism with the actual production data and investigated the association of GUR with other production efficiency indicators.…”

Observation of the Effect of Various Operating Factors on the Cohesive Zone Using the Blast Furnace Irregularity Simulator

“…The main zone of unstable motion in a BF is generally the cohesive zone, which is known to play a crucial role in achieving stable and efficient BF operation. [ 10–18 ] Through this zone, gas is redistributed for the prereduction of iron ore in the shaft zone, where a countercurrent flow of gas and solids occurs. It is also within this zone that the liquid phase (molten iron and slag) is generated and the complex multiphase flow in the lower part of the BF begins.…”