Influence of Type and Consumption of Pellets on Indicators of Blast-Furnace Smelting in the JSC Ural Steel

2021 ◽  
Vol 316 ◽  
pp. 443-448
Author(s):  
Roman R. Dema ◽  
Aleksey N. Shapovalov ◽  
Aleksandr A. Kal'chenko
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Production Data ◽  
Structure And Properties ◽  
Specific Pressure ◽  
Blast Furnace Smelting ◽  
Increase Rate ◽  
A Charge ◽  
Fluxed Pellets ◽  
Furnace Smelting

The article presents the results of the analysis of production data on the operation of the blast furnace No. 1 of Ural Steel JSC for the period from 2013 to 2018. During this period, the Mikhailovsky GOK pellets with different basicities were used. It has been established, that the effectiveness of the use of pellets of different basicities is determined by their behavior in a blast furnace and depends on the proportion of pellets in the iron ore part of the charge. The gas-dynamic conditions of melting deteriorate with an increase in the proportion of pellets in the charge, which is accompanied by an increase in the specific pressure drop and forces the blast rate, to be adjusted. It is necessary to work on 40-45% of fluxed pellets and 20-25% acid pellets in a charge at a blast rate of 2000-2100 m3/min, to minimize coke rate and increase rate of work of blast furnace No. 1 of Ural Steel JSC. An increase in pellet consumption is possible while maintaining the efficiency of blast-furnace smelting only if their high-temperature properties are improved, as a result of optimization of basicity and increase in MgO content, which affects the structure and properties of the silicate binder.

Influence of the consumption of pellets with different basicity on indicators of blast-furnace smelting

2021 ◽  
pp. 4-10
Author(s):  
R. R. Dema ◽  
◽  
A. N. Shapovalov ◽  
S. N. Baskov ◽  
◽  
...  
Keyword(s):  
Blast Furnace ◽  
High Temperature ◽  
Pressure Drop ◽  
Optimal Level ◽  
Coke Rate ◽  
Specific Pressure ◽  
Blast Furnace Smelting ◽  
Gas Dynamic ◽  
Fluxed Pellets ◽  
Furnace Smelting

The results of the analysis of production data on the operation of blast furnace No. 1 (useful volume 1007 m3) of Ural Steel JSC for the period from 2013 to 2018 are presented. During this period, pellets from the Mikhailovsky GOK were used with varying degrees of fluxing: pellets of natural basicity in the ratio of CaO/SiO2 equal to 0.08 ± 0.02 units. (2013-2015) and partially fluxed pellets with a basicity of 0.52 ± 0.05 units. (from 2016 to the present). It has been established that the effectiveness of the use of pellets of various basicities is determined by their behavior in the blast furnace and depends on the proportion of pellets in the iron ore part of the charge. The gas-dynamic conditions of the smelting worsen with an increase in the proportion of pellets in the charge, which is accompanied by an increase in the specific pressure drop and forces the flow rate to be adjusted. There is an optimal level of specific pressure drop (53–55 Pa per 1 m3 of blast per minute) for the operating conditions of blast furnace No. 1 of Ural Steel, which ensures the optimum combination of the melting characteristics. Deviation from the optimal level of pressure drop leads to an increase in coke rate and a decrease in the degree of CO use, which is associated with gas distribution disturbance. Due to the increase in high-temperature properties, the replacement of non-fluxed pellets with off-fluxed pellets improves the gas-dynamic conditions in the lower part of the mine (in the cohesive zone). This leads to a decrease in the total pressure drop and specific pressure drop at a constant flow rate of the blast, and is a reserve for melting intensification. To minimize coke rate and maintain the high-performance operation of blast furnaces of Ural Steel JSC, it is necessary to work on 40–45 % of fluxed or 20–25 % acid pellets in a charge. An increase in pellet consumption while maintaining the efficiency of blast-furnace smelting is possible only if their high-temperature properties are improved. The improvement of these properties is possible as a result of optimizing the basicity and increasing the MgO content, which affects the structure and properties of the silicate bond. This work is carried out within a framework of the government order (No. FZRU-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation.

Development of the Process for Obtaining Iron-Ore Pellets with Required Metallurgical Properties

2019 ◽  
Vol 946 ◽  
pp. 450-455
Author(s):  
Boris Yur'ev ◽  
Vyacheslav Dudko
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Heating Rates ◽  
Blast Furnace Smelting ◽  
Metallurgical Properties ◽  
Ore Pellets ◽  
Oxidation Reduction ◽  
Strength Behavior ◽  
Fluxed Pellets ◽  
Furnace Smelting

We have studied the influence of oxidation-reduction reactions on the structure and strength behavior of the Kachkanar fluxed pellets both in their initial condition and during reduction. It has been discovered that at heating rates and temperatures found in industrial units the roasted pellets that are not oxidized to a full extent and are characterized by zonal structure do not meet the requirements imposed for the blast-furnace smelting raw materials. To develop a process that would ensure high metallurgical properties, we have analyzed the hematite dissociation reaction. It was found that the temperature and the content of slag-forming oxides influence this reaction. A sinter pot was used to carry out the research and determine metallurgical properties of partially dissociated pellets. The obtained results helped to develop a process to dissociate hematite at lower temperatures with calcium ferrosilicate melt. Such pellets are reduced at the temperatures of over 700оС, which prevents their destruction in blast furnaces.

Mathematical Model of Forecasting the Iron Ore Materials and Coke Quality Indicators

2011 ◽  
Vol 312-315 ◽  
pp. 1198-1203 ◽  
Author(s):  
A.N. Dmitriev ◽  
Yu.A. Chesnokov ◽  
G.Yu. Arzhadeeva ◽  
Yu.P. Lazebnaya
Keyword(s):  
Mathematical Model ◽  
Blast Furnace ◽  
Quality Indicators ◽  
Iron Ore ◽  
Coke Quality ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Furnace Technology ◽  
Furnace Smelting

The iron ore raw materials and coke quality is the basic reserve of improvement of blast furnace technology. Some of the quality indicators of iron ore raw materials and coke and their influence on the main parameters of the blast furnace smelting are considered in this paper.

Improvement of the technology for the production of pellets and new iron ore raw materials for modern blast-furnace smelting. Volume 1.

2019 ◽  
Author(s):  
Feleks Zhuravlev ◽  
Vitalii Lyalyuk ◽  
Nikolay Stupnik ◽  
Vladimir Morkun ◽  
Evgeny Chuprinov ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Furnace Smelting

The Coke and Iron Ore Materials Kinetic Characteristics and Quantitative Indicators of Blast Furnace Process

2012 ◽  
Vol 322 ◽  
pp. 87-106 ◽  
Author(s):  
A.N. Dmitriev ◽  
Yu.A. Chesnokov ◽  
G.Yu. Arzhadeeva
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Energy Costs ◽  
Blast Furnace Process ◽  
Blast Furnace Smelting ◽  
Furnace Process ◽  
General Energy ◽  
Quantitative Indicators ◽  
Furnace Smelting

The most important problem at the blast furnace process developing is the great coke consumption decreasing at the minimization of the general energy costs. One of the most effective ways of iron-making technical progress is the iron ore materials and coke physicochemical properties improvement which allows to increase the iron productivity and decrease the specific coke rate without construction of new blast furnaces and concentrating mills. Some of the quality indicators of iron ore raw materials and coke and their influence on the main parameters of a blast furnace smelting are considered in the paper.

The Reducibility of the Iron Ore Materials as Instrument of the Coke Consumption Decrease in the Blast Furnace Smelting

2013 ◽  
Vol 334-335 ◽  
pp. 375-380 ◽  
Author(s):  
A.N. Dmitriev ◽  
Yu.A. Chesnokov ◽  
Galina Yu. Vitkina
Keyword(s):  
Blast Furnace ◽  
Coke Consumption ◽  
Iron Ore ◽  
Diffusion Processes ◽  
Reduction Kinetics ◽  
Blast Furnace Smelting ◽  
Reduction Of Iron ◽  
Kinetics Of ◽  
And Diffusion ◽  
Furnace Smelting

The technique of defining the minimum coke consumption in blast furnace smelting allows for the calculation of the reserve of coke economy on the basis of thermodynamic principles. In this reserve the constitutive role belongs to the reducibility of the iron ore materials (the agglomerate and pellets). In the present paper, the questions of the reduction kinetics of the iron ore materials and diffusion processes at reduction of iron from its oxides are considered. It is shown that the reducibility of the iron ore materials is the basic reserve of economy the scarce and expensive coke in the blast furnace smelting.

Research on Technology of Blast Furnace Optimization of Operation Principle

2012 ◽  
Vol 516-517 ◽  
pp. 401-403
Author(s):  
Yan Bin Chi ◽  
Shuang Ping Yang ◽  
Jie Dong ◽  
Cong Rong Zhang
Keyword(s):  
Blast Furnace ◽  
Economic Effect ◽  
Furnace Operation ◽  
Production Data ◽  
Comparison Analysis ◽  
Blast Furnace Smelting ◽  
Operation System ◽  
Injection Ratio ◽  
Furnace Smelting ◽  
Production Conditions

By study the development situation of blast furnace smelting in china and the blast furnace operation system and technology, combined with production conditions of JISC BF, based on a large number of the production data, the comparison analysis test on JISC BF operation system and technology was did. Through continuously optimization and practice, the relatively suitable operation system and technology of JISC BF at present was explored, which could reduce the coke ratio into furnace while increasing the coal injection ratio and making great economic effect.

Improvement of technology and equipment for the production of iron ore raw materials for modern blast-furnace smelting

2017 ◽  
Author(s):  
Vitalii Lyalyuk ◽  
Nikolay Stupnik ◽  
Feleks Zhuravlev ◽  
Evgeny Chuprinov ◽  
Irina Lyachova ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Furnace Smelting
Sign in / Sign up

Export Citation Format

Share Document