removal of iron from ilmenite

Removal of iron from ilmenite by KOH leaching-oxalate ...

摘要: Oxalic acid was used for the removal of iron from the intermediates of ilmenite leached by KOH liquor. Various parameters, such as pH, temperature, initial oxalate concentration, and illumination were investigated. Meanwhile, it was found that orthorhombic crystal Ti2O2(OH)2(C2O4)·H2O formed as the leaching proceeded.

Catalytic removal of iron from reduced ilmenite ...

2001-3-1 · Catalytic removal of iron from reduced ilmenite 367 In the case of NH4Cl, the pH increases gradually up to 6.2 at 8 hrs, while in the case of glyoxal after an initial increase up to 2 hrs it decreases with a final value of 3.9 at 8 hrs due to formation of free acids in the system during the reaction. Further, the concentration of free acids ...

Removal of Iron from Ilmenite through Selective ...

The removal of trace elements, such as magnesium, in the laboratory experiments was quite similar to the leaching noted in nature between source rock and altered ilmenite. No secondary iron ...

(PDF) Removal of Metallic Iron from Reduced Ilmenite by ...

2020-7-29 · After 9 hours, metallic iron was decreased from 30.3% in reduced ilmenite to 0.5% in synthetic rutile. The addition of 0.4% acetic acid into NH4Cl solution reduces removal time

Removal of iron from ilmenite by KOH leaching-oxalate ...

Oxalic acid was used for the removal of iron from the intermediates of ilmenite leached by KOH liquor. Various parameters, such as pH, temperature, initial oxalate concentration, and illumination ...

Process Development for the Removal of Iron from

2014-12-10 · combined and used to propose a process that could be employed to remove iron from nitrided ilmenite. The proposed process was modelled using the Flowsheet Simulation module in HSC Chemistry 7.0©. The result is a process model that removes most of the iron from nitrided ilmenite and produces a high-quality iron by-product.

Removal of Iron from Titanium Ore through Selective ...

2017-7-21 · A selective chlorination process using magnesium chloride (MgCl 2) as chlorinating agent was investigated with the aim of developing a process for removing iron directly from ilmenite, which is a low-grade titanium ore known as FeTiO 3.Two crucibles, one consisting of titanium ore and the other consisting of a mixture of titanium ore and MgCl 2, were placed in a gas-tight quartz tube, and then ...

Preparation of synthetic rutile from reduced ilmenite ...

2020-1-1 · The effect of NH 4 Cl concentration on the removal of metallic iron is studied by varying the NH 4 Cl concentration in the range of 0.5–2.0 using 100 g of reduced ilmenite with a L/S mass ratio of 6:1, air flow of 0.6 L/min, stirring speed of 400 rpm, at 70 °C for 10 h.

The use of ethylenediammonium chloride as an aeration ...

1999-9-1 · The removal of iron from reduced ilmenite at various oxygen partial pressures at a total gas flow rate of one litre per minute, using EDAC as the catalyst. The question of whether the ammonium chloride or the EDAC was the better catalyst, especially under the conditions of increased oxygen partial pressure, was addressed by repeating the ...

(PDF) Removal of Metallic Iron from Reduced Ilmenite by ...

2020-7-29 · After 9 hours, metallic iron was decreased from 30.3% in reduced ilmenite to 0.5% in synthetic rutile. The addition of 0.4% acetic acid into NH4Cl solution reduces removal time

Removal of Iron from Ilmenite through Selective

2016-6-30 · Removal of Iron from Ilmenite through Selective Chlorination Using PVC PVC에 의한 일메나이트 광석 중 선택염화에 의한 Fe의 제거 Son, Yongik (School of Materials Science and Engineering, Kyungpook National University) ; Ring, Rie (School of Materials Science and Engineering, Kyungpook National University) ;

Removal of iron from ilmenite by KOH leaching-oxalate ...

Oxalic acid was used for the removal of iron from the intermediates of ilmenite leached by KOH liquor. Various parameters, such as pH, temperature, initial oxalate concentration, and illumination were investigated. Meanwhile, it was found that orthorhombic crystal Ti2O2(OH)(2)(C2O4)center dot H2O formed as the leaching proceeded.

Direct Carbothermic Reduction of Weathered Ilmenite for ...

2019-3-15 · The commercial processes to extract iron from ilmenite (FeTiO 3) essentially include energy-intensive methods, such as high-temperature reduction smelting or preoxidation, coupled with reduction by carbon.However, due to altered mineralogy of ilmenite caused by weathering at sea coast, the reduction of iron remains incomplete in either of these processes, demanding a high concentration of

Influence of Ascorbate and Oxalic Acid for the Removal of ...

An investigation of the removal of iron was undertaken by roasting the mineral ilmenite with soda ash in air above 873K. A ternary phase was identified, which played an important role in the ...

Removal of Iron from Titanium Ore through Selective ...

2017-7-21 · A selective chlorination process using magnesium chloride (MgCl 2) as chlorinating agent was investigated with the aim of developing a process for removing iron directly from ilmenite, which is a low-grade titanium ore known as FeTiO 3.Two crucibles, one consisting of titanium ore and the other consisting of a mixture of titanium ore and MgCl 2, were placed in a gas-tight quartz tube, and then ...

Development of Extraction Method and Characterization

2016-5-17 · Titanium compound is generally in combination with iron as ilmenite (FeTiO 3), which so-called iron-titanium sand3,4. Ilmenite contains nearly 53% of TiO 2 (rutile) and is an essential mineral for the processing of titanium with silica impurities of about 10%, iron oxide, vanadium, niobium, tantalum, tin, chromium, and molybdenum compounds.

TITANIUM TETRACHLORIDE PRODUCTION BY THE

2016-3-27 · Because ilmenite contains significant quantities of iron, use of this process requires removal of the iron from the titanium value, in the form of iron (ferric) chloride. Du Pont has claimed that the iron chloride waste is generated through the removal of iron from the ilmenite ore before the physical structure of the ore is destroyed in the

Preparation of synthetic rutile from reduced ilmenite ...

2020-1-1 · The effect of NH 4 Cl concentration on the removal of metallic iron is studied by varying the NH 4 Cl concentration in the range of 0.5–2.0 using 100 g of reduced ilmenite with a L/S mass ratio of 6:1, air flow of 0.6 L/min, stirring speed of 400 rpm, at 70 °C for 10 h.

Removal of Iron from Titanium Ore through Selective ...

Removal of Iron from Titanium Ore through Selective Chlorination Using Magnesium Chloride Jungshin Kang1,+ and Toru H. Okabe2 1Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan 2Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan A selective chlorination process using magnesium chloride (MgCl

Removal of Iron from Ilmenite through Selective

2016-6-30 · Removal of Iron from Ilmenite through Selective Chlorination Using PVC PVC에 의한 일메나이트 광석 중 선택염화에 의한 Fe의 제거 Son, Yongik (School of Materials Science and Engineering, Kyungpook National University) ; Ring, Rie (School of Materials Science and Engineering, Kyungpook National University) ;

Removal of iron from ilmenite by KOH leaching-oxalate ...

Oxalic acid was used for the removal of iron from the intermediates of ilmenite leached by KOH liquor. Various parameters, such as pH, temperature, initial oxalate concentration, and illumination were investigated. Meanwhile, it was found that orthorhombic crystal Ti2O2(OH)(2)(C2O4)center dot H2O formed as the leaching proceeded.

Removal of Iron from Titanium Ore through Selective ...

2017-7-21 · A selective chlorination process using magnesium chloride (MgCl 2) as chlorinating agent was investigated with the aim of developing a process for removing iron directly from ilmenite, which is a low-grade titanium ore known as FeTiO 3.Two crucibles, one consisting of titanium ore and the other consisting of a mixture of titanium ore and MgCl 2, were placed in a gas-tight quartz tube, and then ...

Influence of Ascorbate and Oxalic Acid for the Removal of ...

An investigation of the removal of iron was undertaken by roasting the mineral ilmenite with soda ash in air above 873K. A ternary phase was identified, which played an important role in the ...

TITANIUM TETRACHLORIDE PRODUCTION BY THE

2016-3-27 · Because ilmenite contains significant quantities of iron, use of this process requires removal of the iron from the titanium value, in the form of iron (ferric) chloride. Du Pont has claimed that the iron chloride waste is generated through the removal of iron from the ilmenite ore before the physical structure of the ore is destroyed in the

Alteration of ilmenite | Economic Geology |

Ilmenite and its alteration products in commercial heavy-mineral concentrates were studied by means of chemical analysis, optical microscopy, electron microscopy, electron microprobe, and X-ray diffraction. Breakdown of ilmenite involves oxidation and ultimate removal of iron. Alteration starts on surface of grains and on cleavages and fractures.

An electrochemical investigation of the rusting reaction ...

In this work, acetic and citric acids were used along with ammonium chloride in the removal of iron from reduced Hatinh ilmenite. Iron removal was carried out at 70ºC, 4 liter/min of air flow ...

WO1990004656A1 - Refining of ilmenite by removal of

The presence of chromite in significant amount in ilmenite downgrades the market value of the ilmenite. A substantial amount of the chromite may be removed, firstly by a reduction step, secondly by a leaching, aeration or oxidation roasting step and finally by a physical separation step. An optional preoxidation may precede the reduction step and an optional physical separation step may be ...

Phase Transitions and Microstructural Changes During ...

2021-2-8 · The ore is a weathered ilmenite deposit in which iron oxide has been partially removed by time, and therefore a portion of ilmenite has naturally altered to pseudorutile (Fe 2 Ti 3 O 9). In this phenomenon, pseudorutile is eventually altered to TiO 2 through the leaching removal of iron as hematite.

Removal of Iron from Titanium Ore through Selective ...

Removal of Iron from Titanium Ore through Selective Chlorination Using Magnesium Chloride Jungshin Kang1,+ and Toru H. Okabe2 1Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan 2Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan A selective chlorination process using magnesium chloride (MgCl

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