scholarly journals Estimation of indices of BF heat of titanium-magnetite concentrates with different titanium dioxide content

2019 ◽  
Vol 75 (2) ◽  
pp. 154-165 ◽  
Author(s):  
A. N. Dmitriev ◽  
G. Yu. Vit’kina ◽  
R. V. Petukhov ◽  
S. A. Petrova ◽  
Yu. A. Chesnokov
Keyword(s):  
Titanium Dioxide ◽  
Iron Ore ◽  
Raw Materials ◽  
Slag Viscosity ◽  
Hot Strength ◽  
Titanium Dioxide Content ◽  
Metallurgical Processing ◽  
Economic Indices ◽  
Academy Of Sciences ◽  
Titanium Magnetite

Russia owns world largest reserves of titanium- magnetite and ilmenite- titanium- magnetite ores. Following the stepby-step inclusion into metallurgical processing of titanium- magnetite raw materials, the matter of maximum extraction of iron, vanadium and titanium becomes more and more actual. Kachkanar group of deposits of titanium- magnetite ores consists of two deposits: Gusevgoskoe and Sobstvenno-Kachkanar. At present JSC EVRAZ NTMK uses titanium- magnetite sinter and pellets, produced of Gusevgorskoe deposit ores. To make up the dropped out capacities and to keep the volume of mined ore at the level of 55 m t/year, it is planned to put into operation the reserved Sobstvenno-Kachkanar deposit. To process the titanium- magnetite ores of this deposit, their specific peculiarities should be taken into consideration. In particular, the increased TiO2content in iron ore concentrate up to 3.4% might require corrections of the BF technology. In this connection a study of metallurgical properties of lump iron ore raw materials with different titanium dioxide content was carried out. To clarify the pellets phase components a method of X-ray-phase analysis was used. The studies were done at CKP “Ural-M” equipment in the Institute of Metallurgy, Ural branch of Russian academy of Sciences. It was determined that pellets chemistry was represented by hematite (from 77 up to 89%), magnetite (from 2.84 up to 10.44%), complicated diopside (from 2 up to 10%), as well as in a small amount by quartz, hedenbergite, corundum, rutile, ferro-periclase, ilmenite, wollastonite, α-Fe, wustite. Results of viscosity calculation of obtained slags showed that it is within a range, typical for real BF slags viscosity. The obtained values of slag viscosity do not offer problems with slag regime of BF heat. It was shown, that increase of titanium dioxide content in pellets does not give rise to quality deterioration of iron ore raw materials preparation to BF heat as volume of introduced concentrate with increase TiO2content into the materials is increasing. Increase of hot strength and pellets temperature of beginning of softening, the pellets having increased titanium dioxide content, will positively affect main technical and economic indices of BF heat – coke rate and productivity, that was confirmed by BF indices calculation by application of balance logical and statistical model of BF process. 

Processing of Agglomerates and Pellets Containing Various Amounts of Titanium Dioxide

2021 ◽  
Vol 1026 ◽  
pp. 102-108
Author(s):  
Galina Yu. Vitkina ◽  
Andrey N. Dmitriev ◽  
Roman V. Alektorov ◽  
Elena A. Vyaznikova
Keyword(s):  
Titanium Dioxide ◽  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Chemical Properties ◽  
Blast Furnace Smelting ◽  
Mass Transfer Processes ◽  
Titanium Dioxide Content ◽  
Furnace Smelting

Questions about the oxidative roasting of iron ore raw materials (agglomerates and pellets) are studied. Features of the phase structure of the iron ore raw materials containing titan and vanadium are discussed. Reducibility, durability, and the softening and melting temperatures of metallurgical iron ore raw materials are studied in vitro. The objects of the research are titaniferous ores containing different amounts of titan dioxide. The behaviors of agglomerates and pellets in a blast furnace are studied, and the influence of their physical and chemical properties on heat and mass transfer processes are researched by means of a mathematical model. The main indices of blast furnace smelting—productivity, coke consumption, composition of top gas, cast iron, and slag—are shown. It is established that the increase in titanium dioxide content in pellets, as the amount of concentrate with increased TiO2 content increases, does not cause deterioration in the quality of iron ore raw materials being prepared for blast furnace smelting. At the same time, as the hot strength of raw materials increases, the temperature at which softening begins increases and the temperature interval of softening of materials decreases.

A mathematical model of metallization of titanium-magnetite ores of Kachkanar deposit in Midrex shaft furnace

2021 ◽  
Vol 77 (10) ◽  
pp. 1039-1045
Author(s):  
A. N. Dmitriev ◽  
M. O. Zolotykh ◽  
G. Yu. Vit’kina ◽  
L. A. Marshuk ◽  
M. S. Yalunin
Keyword(s):  
Mathematical Model ◽  
Iron Ore ◽  
Raw Materials ◽  
Shaft Furnace ◽  
Block Diagram ◽  
Direct Reduction ◽  
Widespread Application ◽  
Magnetite Pellets ◽  
Metallization Process ◽  
Titanium Magnetite

Development of a technology for obtaining direct reduction iron from titanium-magnetite ores, which will be the main ore base of the Ural ferrous metallurgy in the future, is one of the urgent tasks of metallurgical science. The world and domestic experience of the development of direct iron reduction processes, which are the most environmentally friendly of all existing methods of obtaining iron from ore considered. It was shown that the technology of metallization of iron ore materials in the Midrex shaft furnace has received the most widespread application. It is noted that the accumulated experience of using Midrex technology in Russian Federation will allow increasing the production of metallurgical raw materials with a reduced carbon footprint. An algorithm and a block diagram for calculating technical and economic indicators of the metallization process for the Midrex process shaft furnace are described. A methodology for calculating material and thermal balance of the Midrex process has been developed, taking into account the use of iron ore raw materials containing vanadium and titanium in the charge. On its basis, an algorithm was developed and a mathematical model of the metallization process was implemented, calculations of the metallization process of titanium-magnetite pellets obtained from the ores of the Kachkanar deposit in the Midrex mine furnace were performed. A comparison of the indicators of the metallization process of titanomagnetite pellets carried out in the shaft furnace of JSC “OEMK named after A.A. Ugarov” and obtained using the created software product showed satisfactory convergence of the results.

The Reduction Processes of the Titanium Containing Iron Ores Treatment

2016 ◽  
Vol 369 ◽  
pp. 6-11 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
R.V. Petukhov ◽  
G.Yu. Vitkina ◽  
Yu.A. Chesnokov ◽  
S.V. Kornilkov ◽  
...  
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Electric Melting ◽  
Iron Ores ◽  
X Ray ◽  
Reduction Processes ◽  
Furnace Melting ◽  
Metallurgical Processing ◽  
Converter Melting

The questions of metallurgical processing of titanium-containing ores are considered. The ores and concentrates of the Kachkanarsky deposit of low-titanous and high-titanous are studied. The reducibility, durability, temperatures of a softening and melting of metallurgical iron ore raw materials are studied in vitro. Via X-ray the structural analysis are carried out. The calculations by means of mathematical models of pyrometallurgical processes are executed. Possibility of the processing of these ores according to schemes is shown: «blast furnace melting − converter melting» and «metallization – electric melting».

scholarly journals The complex processing of titanomagnetite concentrates of the Gremyakha-vyrmes deposit with extraction of vanadium and titanium

2021 ◽  
Vol 12 (2-2021) ◽  
pp. 24-25
Author(s):  
A. S. Atmadzhidi ◽  
◽  
K. V. Goncharov ◽  
Keyword(s):  
South Africa ◽  
Titanium Dioxide ◽  
Blast Furnace ◽  
Vanadium Pentoxide ◽  
Raw Material ◽  
Titanium Dioxide Content ◽  
Complex Technology ◽  
Electric Smelting ◽  
Titanium Magnetite ◽  
Preliminary Reduction

Titanomagnetites are a complex raw material with a high content of valuable components: iron (35–65 %), vanadium (0.5–1.5 %) and titanium (2–14 %). Today, titanium–magnetite concentrates are processed in two ways: blast furnace (Russia, China) and using electric smelting (South Africa). The blast–furnace method is applicable only for low–titanium titanomagnetites. In the case of using titanomagnetite concentrates with a titanium dioxide content of more than 4 %, the method of electric smelting with preliminary reduction is applicable. Both technologies aim to recover the two components iron and vanadium, while titanium is not recovered. In this regard, the development of a complex technology for processing titanomagnetite concentrate to obtain iron in granular form, vanadium pentoxide and titanium is urgent.

Pyrometallurgical processing of high-titaniferous ores.

2020 ◽  
Vol 76 (12) ◽  
pp. 1219-1229
Author(s):  
A. N. Dmitriev ◽  
G. Yu. Vit’kina ◽  
R. V. Alektorov
Keyword(s):  
Titanium Dioxide ◽  
Blast Furnace ◽  
Silicon Content ◽  
Raw Materials ◽  
Hot Metal ◽  
Furnace Melting ◽  
Pyrometallurgical Processing ◽  
Chelyabinsk Region ◽  
Titanium Processing ◽  
Titanium Magnetite

The future development of Ural mineral and raw materials base of steel industry is considerably stipulated by the development of deposits of titanium-magnetite ores, the reserves of which are accounted for near 77% of iron ores of Urals. It was shown, that the content of titanium dioxide as well as harmful impurities in the titanium-magnetite have the decisive meaning for selection of processing technology of them for extraction out of them vanadium and other useful components. Technological schemes of the titanium-magnetite enrichment and industrial methods of titanium-magnetite concentrates processing considered. Examples of titanium-magnetite processing  by  coke-BF  and  coke-less  schemes  given.  The problems  of  blast  furnace  melting  of  titanium-magnetite ores highlighted. Main problems relate to formation of refractory compounds in a form of carbo-nitrides during reduction of titanium and infusible masses in blast furnace hearth. It was shown, that intensification if carbides precipitation is stipulated by increase of intensity of titanium reduction at increased temperatures of a heat products and requires the BF heat to be run at minimal acceptable temperature mode. Technological solutions, necessary to implement in blast furnace for iron ore raw materials with increased content of titanium processing were presented, including increase of basicity of slag from 1.2 to 1.25-1.30, increase of pressure at the blast furnace top from 1.8 to 2.2 atm, decrease of silicon content in hot metal from 0.1 to 0.05%, application of manganese-containing additives. It was noted, that theoretically the blast furnace melting of titanium-magnetite is possible at titanium dioxide content in slag up to 40% when application of the abovementioned technological solutions, silicon content in hot metal to 0.01% and very stable heat conditions of a blast furnace. The actuality of titanium and its pigmental dioxide production increase was noted. Possibilities of development of Medvedevskoje and Kopanskoje deposits of high-titaniferous ores in Chelyabinsk region with extraction not only iron and vanadium but also titanium considered.

Development of Metallurgical Processing Technology the Titanomagnetite Concentrate of the Tebinbulak Deposit

2014 ◽  
Vol 670-671 ◽  
pp. 283-289 ◽  
Author(s):  
Andrey N. Dmitriev ◽  
Oleg Yu. Sheshukov ◽  
Galina I. Gazaleeva ◽  
Yury A. Chesnokov ◽  
Evgeniy V. Bratygin ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Raw Materials ◽  
Processing Technology ◽  
High Quality ◽  
Quality Steel ◽  
Ore Processing ◽  
Metallurgical Processing ◽  
Electric Smelting

The approach to solving the problem of processing iron ore raw materials of Tebinbulak titanomagnetite deposit (Uzbekistan) is offered. It can provide high-quality steel products. The two schemes of processing of Tebinbulak ore are shown. The choice between the proposed schemes of the Tebinbulak ore processing: variant of "blast furnace – converter" and variant of "metallization – electric smelting" should be made after thorough analysis based on many factors.

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

Physical-Chemical and Pyrometallurgical Estimation of Processing of Complex Ores with Extraction of Iron, Vanadium, Titanium

2021 ◽  
Vol 407 ◽  
pp. 41-50
Author(s):  
Andrey N. Dmitriev ◽  
Galina Yu. Vitkina ◽  
R.V. Alektorov ◽  
E.A. Vyaznikova
Keyword(s):  
Steelmaking Furnace ◽  
Blast Furnace Smelting ◽  
X Ray ◽  
Arc Steelmaking Furnace ◽  
Vanadium Extraction ◽  
High Base ◽  
Metallized Pellets ◽  
Academy Of Sciences ◽  
Furnace Smelting ◽  
Titanium Magnetite

The metallurgical characteristics of pellets (reducibility, strength after reaction, softening start and end temperatures), phase composition (X-ray phase analysis), and porosity were studied. Blast furnace smelting parameters were calculated using laboratory pellets with different basicities and degrees of metallization. Pellets were obtained from complex titanium-magnetite ores. The vanadium extraction of this ore into metal did not exceed 10 % during smelting of metallized pellets in an arc steelmaking furnace, but special techniques could raise this to 85 %. According to calculations from the Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences (IMET UB RAS), vanadium extraction up to 80–90 % can be achieved by using high-base and partially metallized pellets. The influence of changes in the composition and metallurgical characteristics of titanomagnetite pellets with increasing basicity (especially relative to strength after reduction) should be taken into account.

Russia’s Strategic Interests in the Post-Soviet Space

2010 ◽  
pp. 32-45
Author(s):  
S. Chebanov
Keyword(s):  
World Economy ◽  
Raw Materials ◽  
Organizational Structures ◽  
Economic Space ◽  
Efficient Integration ◽  
The Subject ◽  
Soviet Space ◽  
Cis Countries ◽  
Academy Of Sciences ◽  
Post Soviet Space

The publication represents a version of the key-note report at the session of the Academic Council of the Institute of World Economy and International Relations, Russian Academy of Sciences, on the subject "Russia’s Strategic Interests in the Post-Soviet Space", which took place at IMEMO in March 2010. A spokesperson A.N. Spartak, Dr. Sci. (Economics), Director of the All-Russian Research Conjuncture Institute, presumes that today, in all political and economic multi-vector nature of the CIS countries' present development, with a glance to ramifications of crisis, the integration perspective is growing solicited and attractive for most of them. The understanding is deepening that exactly Russia, with its economic, technological and raw materials potential, receptive market, developed transportation lines and manufacturing tides can provide an efficient integration of the CIS economic space into the world economy, without disarranging herewith technological, industrial and organizational structures of these countries' economies, and avoiding the risk of instability uprise.

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