Integrated processing of difficultly dressed titanium-containing ores

Kustov, Andrey D.; Кенова, Т. А.; Zakirov, R. A.; Parfenov, O. G.

doi:10.1134/s107042721708002x

Cited by 5 publications

(5 citation statements)

References 3 publications

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“…Main reaction of magnetite reduction through wustite at relatively low temperatures proceeds poorly (Eqs. (7)(8)(9)). Equilibrium reactions (7)(8)(9) are shifted to the right side, starting with 1010 K (…”

Section: Thermodynamic and Kinetic Analysismentioning

confidence: 99%

“…Studies on the technology of processing titanium-magnetite ores are carried out to recover iron, titanium, chromium, vanadium, and other products [3][4][5][6]. Pyrometallurgical [7,8], hydrometallurgical [9] and specific chemical methods for processing enriched titanium-magnetite ores to produce metallic iron and titanium-vanadium fractions are used [10,11]. For several years, we have been developing 1 Nagiyev Institute of Catalysis and Inorganic Chemistry ANAS, 113, H. Javid Ave., AZ 1134, Baku, Azerbaijan 2 Azerbaijan Technical University, 25, H. Javid Ave., AZ-1073 Baku, Azerbaijan * asif.mammadov.47@mail.ru Ó Mammadov A., Pashazade G., Gasymova A., Sharifova U., 2020 [12][13][14] processes for the complex processing of titaniummagnetite concentrates using the non-domain method of direct reduction of granules by natural gas in the solid phase to produce iron powder, titanium dioxide and vanadium.…”

Section: Introductionmentioning

confidence: 99%

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Production of Iron, Titanium Dioxide Modofocations and Titanium

Mammadov¹,

Pashazade²,

Gasymova³

et al. 2020

Ch&Cht

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Conditions for the reduction of titaniummagnetite concentrates (main components are Fe 52-54 % and TiO 2 5-7 %) by natural gas for obtaining iron powder and titanium fraction were studied. Based on the theory of granulation in the drum apparatus, granules with 25 % of soda fluxing additive with optimum diameter, humidity, strength and porosity were obtained. It was found that the reduction reactions in the temperature range of 1143-1198 K are carried out if a mixture of hydrogen and carbon monoxide is added to the natural gas in amount of 15 vol %. Block-diagrams for processing titaniummagnetite concentrates for the production of iron powder α-Fe (purity 99 %), anatase and rutile modifications of titanium dioxide (99 % TiO 2 ) and titanium with a purity of 99% are presented.

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Section: Thermodynamic and Kinetic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Production of Iron, Titanium Dioxide Modofocations and Titanium

Mammadov¹,

Pashazade²,

Gasymova³

et al. 2020

Ch&Cht

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“…Russia ranks second in the world in terms of its proven reserves of titanium raw materials [ 1 , 2 , 3 , 4 ]. At the same time, not a single titanium deposit is being developed in the country, and the demand for raw materials and processing products is mainly satisfied through imports.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sorption Materials from Low Grade Titanium Raw Materials

2022

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In this paper, a universal technology is proposed for processing low-titanium mineral raw material—apatite-nepheline ore waste, including its treatment with sulfuric or hydrochloric acid in a two-stage mode with a sequential increase in the concentration. This technique allowed us to remove nepheline and apatite in the first stage and achieve a titanium mineral content of TiO2 of more than 30%; in the second stage, we were able to convert the titanium into its precursors—titanyl sulfate monohydrate TiOSO4·H2O and a hybrid rutile-silica composition. The key stage in the sorbent synthesis is the reaction of the precursor with a phosphoric acid solution. The preferred sequence of operations begins with the mechanical activation of the precursor, causing morphological changes in it, and subsequent treatment with phosphoric acid at different concentrations under atmospheric conditions and in an autoclave, accompanied by phase transformations. Conditions for the chemical reactions which regulated the composition and structure of the final product and, accordingly, its sorption activity were found. With the help of XFA, the phase compositions of the sorbents were identified, including the individual crystalline phase α-TiP obtained from TS or the crystalline phase αTi(HPO4)2∙H2O, which is in an amorphous silica matrix obtained from a rutile–silica composition.

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“…Owing to the depletion of rich magnetite ore reserves, the research has been developed on technology of titanium ore processing to produce iron, titanium, chromium and vanadium [1][2][3][4]. To determine optimal conditions of oxidation-reduction reactions, thermodynamic calculations are widely used [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, when determining the temperature dependence of the Gibbs free energy of the reaction (1) by equation (2,3), the enthalpy and entropy of melting of these compounds were used: Figure 1 presents the results of calculations using equations (2 and 3). 3.…”

Section: Introductionmentioning

confidence: 99%

Nonequilibrium Thermodynamics of Oxidative Recovery Reactions Vanadium Containing Titanomagnetite Concentrates

Sharifova¹,

Qasimova²,

Mammadov³

2019

Chemical Problems

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Non-equilibrium and equilibrium thermodynamic conditions of direct reduction of magnetite to free iron and oxidation of vanadium (3) to vanadium (5) in granules fluxed by soda vanadist titanomagnetite concentrates using a mixture of natural gas and hydrogen were determined. To determine temperature dependences of Gibbs free energy of redox reactions, the Temkin-Schwartsman equation was modified with due regard for the Gibbs free energy of formation of magnetite-based substitution solid solutions and the vapor pressure of the components in the flow system where the mixture of methane and hydrogen is continuously fed while gaseous reaction products are removed. 3D modeling of the Gibbs free energy difference of reactions proceeding under equilibrium and non-equilibrium conditions was carried out. On the basis of the free energy of the system deviation from the equilibrium state, it revealed that the greatest effect of reducing the temperature of redox reactions is observed in terms of low values of the reaction products pressure As a result of the thermodynamic analysis, the temperature range of 950-970K was chosen to produce metallic iron and sodium vanadate.

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Integrated processing of difficultly dressed titanium-containing ores

Cited by 5 publications

References 3 publications

Production of Iron, Titanium Dioxide Modofocations and Titanium

Production of Iron, Titanium Dioxide Modofocations and Titanium

Synthesis of Sorption Materials from Low Grade Titanium Raw Materials

Nonequilibrium Thermodynamics of Oxidative Recovery Reactions Vanadium Containing Titanomagnetite Concentrates

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