scholarly journals Increasing the efficiency of blast-furnace smelting by improving the quality of iron ore materials

2019 ◽  
pp. 43-60
Author(s):  
A.S. Nesterov ◽  
L.I. Garmash
Keyword(s):  
Blast Furnace ◽  
Cast Iron ◽  
Chemical Composition ◽  
Coke Consumption ◽  
Iron Ore ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Blast Furnace Dust ◽  
Sinter Mixture

It is noted in the work that when mastering the technology of pulverized coal injection (PUT) at the metallurgical enterprises of Ukraine, it is necessary to intensify work, including research, in the direction of improving the quality characteristics of the sinter, the stability of its chemical composition and strength parameters. The analysis of the quality of iron ore raw materials used in sintering production in Ukraine and foreign countries is carried out. The requirements of international and domestic standards for the quality of raw materials and fuels, providing for the injection of large quantities of firearms into the furnace, are given. A methodology for determining the quality of raw materials developed in the HMI is described. The results of a study of the quality of iron ore raw materials according to the developed method are presented. Based on the analysis of the results of the research, requirements were developed for the quality of granular iron ore wastes and their rational amount in the composition of the sinter charge, and the process for the production of granules was developed. Recommendations have been developed on the use in the sinter mixture of a part of the granular components of secondary waste, which allowed to increase the content of secondary resources in the mixture. As a result, the chemical composition of the sinter was stabilized, its strength was improved, the yield of sinter of the second grade was reduced, the removal of blast furnace dust and coke consumption were reduced. Improving the quality of the sinter and the rational distribution of charge materials over the cross-section of the top of the blast furnace allows for self-renewal of the protective skull, to reduce the removal of top dust by 4.3 kg / t of cast iron, and to reduce coke consumption by 19.6 kg / t of cast iron. The developed measures make it possible to increase the competitiveness of products, even at the additional cost of preparing the sinter mixture for sintering.

Research of Titaniferous Ores Melting and Properties of Cast Iron and Slag

2019 ◽  
Vol 391 ◽  
pp. 221-225
Author(s):  
Andrey N. Dmitriev ◽  
R.V. Petukhov ◽  
G.Yu. Vitkina ◽  
E.A. Vyaznikova
Keyword(s):  
Blast Furnace ◽  
Cast Iron ◽  
Chemical Composition ◽  
Iron Ore ◽  
Raw Materials ◽  
Scientific Research ◽  
Economic Indicators ◽  
Furnace Melting ◽  
Technical And Economic Indicators

Questions of melting of iron ore and raw materials with receipt of cast iron and slag are considered in vitro. The chemical composition of cast iron of slag is studied in vitro. The viscosity of slag is researched. Object of research - titaniferous ores with various contents of titan dioxide. The technical and economic indicators of a blast furnace melting an agglomerate and pellets (a consumption of coke and productivity, a chemical composition of cast iron and slag) received from a concentrate of the Kachkanarsky deposit are calculated. The technique of scientific research is used [1].

scholarly journals The physicochemical bases of the pyrometallurgical processing of the titanomagnetite ores

2017 ◽  
Vol 89 (10) ◽  
pp. 1543-1551 ◽  
Author(s):  
A. N. Dmitriev ◽  
G. Yu. Vitkina ◽  
R. V. Petukhov
Keyword(s):  
Experimental Study ◽  
Blast Furnace ◽  
Coke Consumption ◽  
Iron Ore ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Melting Temperatures ◽  
Pyrometallurgical Processing ◽  
Qualitative Characteristics ◽  
Furnace Smelting

AbstractThe questions of an experimental study on the qualitative characteristics of iron ore raw materials (durability, reducibility, softening and melting temperatures) and their influence on indicators of blast furnace smelting (coke consumption and productivity) are considered.

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.

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

Methodical Basis of Investigation of Influence of the Iron Ore Materials and Coke Metallurgical Characteristics on the Blast Furnace Smelting Efficiency

2012 ◽  
Vol 602-604 ◽  
pp. 365-375 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
Galina Yu. Vitkina ◽  
Yu.A. Chesnokov
Keyword(s):  
Blast Furnace ◽  
Laboratory Tests ◽  
Iron Ore ◽  
Analytical Study ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Metallurgical Properties ◽  
Methodical Basis ◽  
Definition Of ◽  
Furnace Smelting

A new method of the estimation of influence of the iron ore materials and coke metallurgical properties on the efficiency of blast furnace smelting is developed. It consists in the following stages: the laboratory tests with the definition of the iron ore materials and coke metallurgical properties; the analytical study of the influence of these characteristics on the efficiency of blast furnace smelting using by mathematical models; the experimental industrial and industrial tests. The developed methodological basis allows to obtain improved criteria for evaluating the metallurgical characteristics of the raw materials and to explain the mechanism of their effect on the reaction of the direct and indirect recovery in the blast furnace. Therefore it allows to formulate recommendations to improve the blast furnace smelting technology.

scholarly journals Benefits and risks of blast furnaces with high intensity

2018 ◽  
Vol 61 (10) ◽  
pp. 760-765
Author(s):  
S. A. Zagainov ◽  
S. V. Filatov ◽  
S. V. Myasoedov ◽  
L. Yu. Gileva ◽  
V. N. Titov
Keyword(s):  
Blast Furnace ◽  
High Intensity ◽  
Iron Ore ◽  
Furnace Productivity ◽  
Gas Temperature ◽  
Blast Furnace Smelting ◽  
Pressure Drops ◽  
Ore Load ◽  
Furnace Height

Increase in the intensity of blast furnace smelting at NLMK JSC is achieved by improving quality of coke and iron ore materials, by increasing pressure under the blast furnace mouth and by oxygen enrichment. It is accompanied by an increase in the rate of wustite indirect reduction and decrease in specific heat losses with cooling water. However, the risks of burden yield problems are significantly lower with high intensity. It has been established that with the change in quality of charge materials, reason for burden yield problems can be also the variation in ore load ratio along the furnace radius. A new method for diagnosing causes of burden yield problems was developed. Using method of mathematical modeling, effect of change in ore load and size of iron-ore materials on peripheral gases temperature change and the degree of CO use were analyzed. The method is based on analysis of joint change in gas temperature and degree of CO use in peripheral area. Analysis of peripheral gases temperature variation and degree of CO use makes it possible to identify reasons of pressure drops along the furnace height. As a result of analysis of pressure drops dynamics changes along the furnace height, there have been found signs that can be used to judge the probability of burden yield problems. The possibility of reducing pressure drops due to redistribution of ore load along the furnace radius and the amount of gases is considered. It is shown that various methods of reducing the amount of gases are accompanied by different changes in coke consumption and furnace productivity. Mathematical model has been developed to select the best combination of parameters changing of the fuel-enriched blast in specific conditions.

Features of the Reducibility of Titanomagnetite Iron Ore Materials

2020 ◽  
Vol 400 ◽  
pp. 176-185
Author(s):  
A.N. Dmitriev ◽  
R.V. Alektorov ◽  
Galina Yu. Vitkina ◽  
S.A. Petrova ◽  
Yury A. Chesnokov
Keyword(s):  
Titanium Dioxide ◽  
Blast Furnace ◽  
Iron Ore ◽  
Economic Indicators ◽  
Blast Furnace Smelting ◽  
Ore Preparation ◽  
Before And After ◽  
Technical And Economic Indicators ◽  
Furnace Smelting

The reducibility of titanomagnetite iron ore materials (agglomerate, pellets) with various TiO2 contents are studied. The mineralogical features of agglomerate and pellets before and after reduction are investigated. Calculations of technical and economic indicators of blast furnace smelting using iron ore materials with different TiO2 contents are carried out. It is shown that an increase in the content of titanium dioxide in pellets and agglomerate (with an increase in the amount of concentrate introduced into them) does not change the quality of iron ore preparation for blast furnace smelting.

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