Assessing the Gas Permeability of the Cohesive Zone in the Blast Furnace

2019 ◽  
Vol 49 (3) ◽  
pp. 179-184
Author(s):  
A. V. Kuzin ◽  
N. S. Khlaponin
Keyword(s):  
Blast Furnace ◽  
Cohesive Zone ◽  
Gas Permeability

scholarly journals Gas Permeability in Cohesive Zone in the Ironmaking Blast Furnace

2017 ◽  
Vol 57 (9) ◽  
pp. 1531-1536 ◽  
Author(s):  
Jun Ishii ◽  
Ryota Murai ◽  
Ikuhiro Sumi ◽  
Yang Yongxiang ◽  
Rob Boom
Keyword(s):  
Blast Furnace ◽  
Cohesive Zone ◽  
Gas Permeability

scholarly journals Analysis of the methods of management of the domain melt on the basis of information about the form and position of the cohesive zone

2018 ◽  
pp. 151-164
Author(s):  
I.G. Muravyova ◽  
N.G. Ivancha ◽  
E.A. Beloshapka ◽  
V.I. Vishnyakov ◽  
E.P. Ermolina ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Plastic Zone ◽  
Cohesive Zone ◽  
Iron Ore ◽  
Gas Permeability ◽  
Smelting Process ◽  
Hollow Cone ◽  
Furnace Melting ◽  
And Control ◽  
Main Influence

The aim of the work is to formulate recommendations on the adoption of control actions on the course of smelting in modern conditions. The ideology of the modern intellectual decision support system for blast smelting management is based on providing the optimal plastic zone in the blast furnace (DP). Blast furnace melting control methods are based on information on the shape and position of the plastic zone in the blast furnace. According to the results of research carried out by various scientists, it was shown that the plastic zone is a hollow cone, the walls of which consist of alternating horizontal coke layers with high gas permeability and low-permeable for gas layers of iron ore materials that are in a softened, semi-molten state. The work describes the factors that determine the shape and position of the plastic zone in the DP. The analysis carried out showed that the mode of loading of charge materials has the main influence on the formation of the plastic zone. It was noted that, in addition to various modeling methods, it is advisable to create a criterion for assessing the shape and position of the plastic zone, which would take into account its thickness, profile and position in the DP, to control and control the blast smelting process. Developed recommendations for making management decisions during smelting.

scholarly journals Phase Transformation of Cohesive Zone in a Water-quenched Blast Furnace

2018 ◽  
Vol 58 (10) ◽  
pp. 1775-1780 ◽  
Author(s):  
Xiaoyue Fan ◽  
Kexin Jiao ◽  
Jianliang Zhang ◽  
Kaidi Wang ◽  
Zhiyu Chang
Keyword(s):  
Phase Transformation ◽  
Blast Furnace ◽  
Cohesive Zone

scholarly journals Microstructure Change and Primary Slag Melting of Sinter in the Cohesive Zone of a Blast Furnace

2015 ◽  
Vol 55 (6) ◽  
pp. 1223-1231 ◽  
Author(s):  
Miyuki Hayashi ◽  
Kyohei Suzuki ◽  
Yasuhiro Maeda ◽  
Takashi Watanabe
Keyword(s):  
Blast Furnace ◽  
Cohesive Zone ◽  
Microstructure Change ◽  
Slag Melting

scholarly journals Relationship and Mechanism Analysis of Soft-Melt Dropping Properties and Primary-Slag Formation Behaviors of the Mixed Burden in Increasing Lump Ore Ratio

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1254 ◽  
Author(s):  
Yun-Fei Li ◽  
Zhi-Jun He ◽  
Wen-Long Zhan ◽  
Wei-Guo Kong ◽  
Peng Han ◽  
...  
Keyword(s):  
Pressure Difference ◽  
Cohesive Zone ◽  
Gas Permeability ◽  
Effective Means ◽  
Maximum Pressure ◽  
Slag Formation ◽  
Mechanism Analysis ◽  
Temperature Zone ◽  
Slag Properties ◽  
The Relationship

At present, cost reduction and environmental protection are the mainstream of blast furnace (BF) development and the high lump ore ratio is an effective means. Therefore, it is significant to explore the relationship and mechanism of burden soft-melt dropping and its primary-slag formation behaviors under increasing lump ore ratio. In this paper, the melt–drop test is carried out on the single ore and mixed burden, and obtained primary-slag properties are subjected to analysis. The experimental results show that the primary-slag of lump ore contains a large amount of FeO and SiO2, so it simply produces many low melting point compounds, which cause terrible soft-melt dropping properties and primary-slag formation behaviors. Notably, mixing with sinter and pellet can effectively improve both the properties. With the increase in lump ore ratio, the CaO in the primary-slag decreases, FeO and SiO2 increase, resulting in the melting temperature of the primary-slag sequentially decreasing and the cohesive zone moves to the low temperature zone. In addition, the maximum pressure difference increases, and the gas permeability deteriorates. Increasing the sinter ratio can overcome the defect of high lump ore ratio that can effectively improve the poor softening performance, melting performance and the position and thickness of the cohesive zone. However, because of the pulverization performance, the maximum pressure difference and gas permeability of the burden become worse.

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