Solid-phase prereduction of iron-vanadium concentrates and liquid-phase separation of the products of their reduction

Рощин, В. Е.; Асанов, А. В.; Рощин, А. В.

doi:10.1134/s0036029510110029

Cited by 18 publications

(5 citation statements)

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“…He 14) studied the distributions of titanium, vanadium, and chromium on the iron and slag in the smelting of CVTM in BF due to the specific reactions of valuable components. Li 15) studied that the addition of V 2 O 5 promoted the reduction rate of iron ore to iron carburization due to the catalytic effect of reduced metallic iron on methane cracking which accelerates the reduction and carburization of iron ore. Roshchin 16) studied the reduction of Fe from the iron-vanadium concentrates, and vanadium and chromium are fixed by titanium oxides and are not present in both of residual magnetite and metallic phase. Zhao 17) studied the reduction behavior of FeV 2 O 4 and FeCr 2 O 4 during the direct reduction of VTM.…”

Section: Effect Of V 2 O 5 Addition On Oxidation Induration and Swellingmentioning

confidence: 99%

Effect of V2O5 Addition on Oxidation Induration and Swelling Behavior of Chromium-Bearing Vanadium Titanomagnetite Pellets with Simulated Coke Oven Gas Injection into Blast Furnace

2019

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The study discusses the oxidation induration and swelling behavior of chromium-bearing vanadium titanomagnetite pellets (CVTP) with V 2 O 5 additions, and the reduction swelling index (RSI) and compressive strength (CS) of reduced CVTP were investigated with simulated coke oven gas (COG) injection into the blast furnace (BF). The results show that the CS of CVTP decreases and the porosity of CVTP increases with increasing V 2 O 5 additions. The proportion of microsize pore size distribution of CVTP between 0 to 5 μm decreases notably while the pore size distribution between 5 to 30 μm increases with increasing V 2 O 5 additions. The V 2 O 5 mainly exists in the form of V 2 Ti 3 O 9 and V 1.93 Cr 0.07 O 3 in CVTP and V 2 TiO 5 in reduced CVTP. The V-bearing spinels on the grain boundaries with fragmentized and prismatic structure restrain the CS of CVTP. The CS of reduced CVTP decreases and RSI increases with increasing V 2 O 5 additions. The V 2 O 5 addition facilitates the aggregation and diffusion of metallic iron particles, and the shape of the metallic iron whiskers transform round dot to prismatic. The pores and intervals enlarge, and thickness of lamellar crystals thickens gradually with increasing V 2 O 5 additions. The study could supply the theoretical and technical basis for the utilization of CVTP and other V-bearing ores with COG recyclable technology. KEY WORDS: V 2 O 5 ; oxidation induration; reduction swelling index; coke oven gas; chromium-bearing vanadium titanomagnetite pellets.

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Section: Effect Of V 2 O 5 Addition On Oxidation Induration and Swellingmentioning

confidence: 99%

Effect of V2O5 Addition on Oxidation Induration and Swelling Behavior of Chromium-Bearing Vanadium Titanomagnetite Pellets with Simulated Coke Oven Gas Injection into Blast Furnace

2019

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“…The prereduction is carried not only during processing of iron [1][2][3], but also chromium [4][5][6][7], manganese [8][9], as well as titanomagnetite and ilmenite ores [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Pyro-Metallurgical Processing of Ilmenite Concentrate with Production of Iron and Titanium Oxides

Smirnov

Гамов

2021

SSP

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The main problem of processing of ores with a high content of titanium oxides is refractory slag based on TiO2, which makes it difficult to melt. The methods of processing of titanomagnetite and ilmenite ores were analyzed. It is shown that the existing scheme of processing does not meet the requirements of complex use of materials. The paper presents the results of laboratory studies on reduction of ilmenite concentrate and subsequent pyrometallurgical separation of reduction products without addition of flux or slag-forming materials. Solid-phase reduction of iron enabled to extract iron selectively from the ilmenite crystal lattice, not diluting the oxide phase with the reducing agent ash. Using the advantages of solid-phase reduction, the possibility of obtaining pure iron and slag with a high content of titanium oxides was shown.

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“…Thereby, the ore of the Suroyam deposit is unsuitable for the extraction of iron and vanadium using the existing processing scheme. However, it remains a raw material for the future possibility of iron and vanadium production ore when using new theories and technologies for their processing [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Solid-Phase Reduction of Iron from Suroyam Titanomagnetite Ore during Metallization in Rotary Kiln

Smirnov

Салихов

Roshchin

2019

MSF

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In this work the solid-phase reduction of iron from the Suroyam titanomagnetite ore was studied during metallization in a rotary kiln. The technique of preparation of the ore and reducing agent for metallization and the process of continuous processing of materials in a rotary kiln were described in detail. For metallization the temperature was chosen 1150°C, due to low melting point of apatite from one of the components. The results of the electron microscope analysis of the initial ore and samples subjected to metallization for 1-hour reduction time were presented. The reduction of iron occurred despite absence of pores and contact with a reducing agent in the grains of titanomagnetite. Iron in the grains of titanomagnetite surrounded by apatite was reduced to wustite; whereas, iron surrounded by clinopyroxene was reduced to metallic iron. This indicated the effect of composition of the gangue materials on the reduction process.

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Solid-phase prereduction of iron-vanadium concentrates and liquid-phase separation of the products of their reduction

Cited by 18 publications

References 0 publications

Effect of V<sub>2</sub>O<sub>5</sub> Addition on Oxidation Induration and Swelling Behavior of Chromium-Bearing Vanadium Titanomagnetite Pellets with Simulated Coke Oven Gas Injection into Blast Furnace

Effect of V<sub>2</sub>O<sub>5</sub> Addition on Oxidation Induration and Swelling Behavior of Chromium-Bearing Vanadium Titanomagnetite Pellets with Simulated Coke Oven Gas Injection into Blast Furnace

Pyro-Metallurgical Processing of Ilmenite Concentrate with Production of Iron and Titanium Oxides

Solid-Phase Reduction of Iron from Suroyam Titanomagnetite Ore during Metallization in Rotary Kiln

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