INFLUENCE OF ALKALI CONTENT IN IRON ORE RAW MATERIALS ON SPECIFIC COKE CONSUMPTION

Vestnik LSTU ◽  
2021 ◽  
pp. 93-96
Author(s):  
Vladimir Nikolaevich Titov ◽  
Irina Vyacheslavovna Kupriyanova ◽  
Tatiana Viktorovna Kravchenko ◽  
Anastasia Dmitrievna Konevzerova
Keyword(s):  
Coke Consumption ◽  
Iron Ore ◽  
Raw Materials ◽  
Alkali Content

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.

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.

Adjustment of a technology of cast iron smelting in the blast furnace of jsc "ural steel" w ith a volume of 1232 см3 with charge h a v in g 95% share of Mikhailovskii GOK pellets

2021 ◽  
Vol 77 (7) ◽  
pp. 768-775
Author(s):  
I. F. Iskakov ◽  
G. A. Kunitsyn ◽  
D. V. Lazarev ◽  
А. А. Red`kin ◽  
S. A. Trubitsyn ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Raw Material ◽  
Material Base ◽  
Hot Metal ◽  
Charging System ◽  
Iron Smelting ◽  
Gas Consumption ◽  
A Charge

To use effectively internal raw material base, JSC “Ural Steel” accomplished I category major overhaul of the blast furnace No. 2. The main purpose of the overhaul was to design a rational profile which could ensure an ability to operate with a charge containing 95 % of Mikhailovskii GOK (mining and concentrating plant) pellets having basicity of 0.5 by CaO/SiO2. The blast furnace No. 2 having useful volume of 1232 m3, was constructed by design of Danieli Corus, the Netherlands, and was blown in on December 30, 2020. In the process of guarantee tests, step-by-step increase of Mikhailovskii GOK pellets (Fetotal = 60.5 %, CaO/SiO2 = 0.5) content in the charge iron ore part was being accomplished from 55 to 95.1%. Charging of the blend containing pellets in the amount of 55% of iron ore part, was done by charging system 4OOCC + 1COOCC (Ore - Coke) with filling level 1.5 m. Under conditions of pellets part increase in the blend, the charging system was changed to decrease their content at the periphery, to increase it in the ore ridge zone and make it intermediate between periphery and the ore ridge. At the pellets share in the iron ore raw materials 0.75 the charging system was used as the following: 3OOCC + 1COOC + 1COOCC, while at the content 95.1% the following charging system was used: 2COOC + 2COOC + 1COOCC. It was noted that in the period of guarantee tests the furnace running was smooth. The average silicon content in the hot metal was 0.70% at the standard deviation 0.666. Sulfur content in the hot metal did not exceed 0.024%, the blowing and natural gas consumption figures were 2100 m3/min and 11000 m3/min correspondently, oxygen content in the blowing 26.5%, hot blowing and top smoke pressure figures were 226.5 and 109.8 KPa correspondently. The productivity of the furnace was reached as high as 2358 t/day at the specific coke rate 433 kg/t of hot metal. After guarantee tests completion, the pellets content in the iron ore part was decreased gradually from 95 down to 50%. The decreasing was made by 5% in every 6 hours of operation. Application of the mastered technology of the blast furnace No. 2 with the increased share of pellets will enable to stably supply the blast furnaces No. 1, 3 and 4 by iron ore raw materials in the proportion of 30-35% of pellets and 65-70% of sinter.

INTEGRAL INDEX OF QUALITY OF IRON ORE RAW MATERIALS AND PREDICTING COMPOSITION OF PIG IRON

Metallurg ◽  
2021 ◽  
pp. 14-19
Author(s):  
P.I. Chernousov ◽  
S.N. Seregin ◽  
R.E. Grishin ◽  
Ya.S. Tsvily
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Pig Iron ◽  
Integral Index ◽  
Index Of Quality

scholarly journals Iron-Ore Sintering Process Optimization / Optymalizacja Procesu Aglomeracji Rudy Żelaza

2015 ◽  
Vol 60 (4) ◽  
pp. 2895-2900 ◽  
Author(s):  
M. Fröhlichová ◽  
D. Ivanišin ◽  
A. Mašlejová ◽  
R. Findorák ◽  
J. Legemza
Keyword(s):  
Iron Content ◽  
Iron Ore ◽  
Raw Materials ◽  
Size Composition ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Iron Ore Sinter ◽  
A Charge ◽  
Iron Ore Concentrate

The work deals with examination of the influence of the ratio between iron ore concentrate and iron ore on quality of produced iron ore sinter. One of the possibilities to increase iron content in sinter is the modification of raw materials ratio, when iron ore materials are added into sintering mixture. If the ratio is in favor of iron ore sinter, iron content in resulting sintering mixture will be lower. If the ratio is in favor of iron ore concentrate and recycled materials, which is more finegrained, a proportion of a fraction under 0.5 mm will increase, charge permeability property will be reduced, sintering band performance will decrease and an occurrence of solid particulate matter in product of sintering process will rise. The sintering mixture permeability can be optimized by increase of fuel content in charge or increase of sinter charge moisture. A change in ratio between concentrate and iron ore has been experimentally studied. An influence of sintering mixture grain size composition, a charge grains shape on quality and phase composition on quality of the produced iron sinter has been studied.

scholarly journals Problems of a Transport Complex of Mining and Processing Plants

2021 ◽  
Vol 334 ◽  
pp. 02034
Author(s):  
Alla Semykina ◽  
Nikolay Zagorodniy ◽  
Yuliya Fomenko ◽  
Alexey Konev
Keyword(s):  
Production Process ◽  
Iron Ore ◽  
Raw Materials ◽  
Rational System ◽  
Material Costs ◽  
Transportation Process ◽  
Processing Plants ◽  
Transport Complex

The article considers problems of a transport complex of mining and processing plants. Requirements for quarry transport are presented. The production process and technological operations of the transportation process are considered. The ways of solving the problems of the transportation process are determined. It is established that when creating a rational system for transporting iron ore raw materials, it is possible to reduce material costs and losses during transportation.

Development of the fundamentals of the technology of complex processing of high-magnesium iron ore raw materials

2021 ◽  
pp. 30-37
Author(s):  
A. N. Smirnov ◽  
S. A. Krylova ◽  
D. I. Alekseev ◽  
V. I. Sysoyev ◽  
A. I. Volkov
Keyword(s):  
Iron Ore ◽  
Raw Materials

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.

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