The reaction between reduced ilmenite and oxygen in …

Ilmenite is the primary feedstock for the manufacturing of titanium goods, however it needs to be refined before the usage. Becher is an eco-friendly process for refining ilmenite by rusting metallic iron from reduced ilmenite to separate iron and TiO 2, and NH 4 Cl is the commonly utilized solvent in this method. In the current study, the …

Effect of NH4Cl on the rusting leaching behavior of metallic …

Ilmenite is the primary feedstock for the manufacturing of titanium goods, however it needs to be refined before the usage. Becher is an eco-friendly process for refining ilmenite by rusting metall ... kth.se Publications. Simple search Advanced search - Research publications Advanced search - Student theses Statistics . English ...

Rusting kinetics of metallic iron in reduced ilmenite …

The rusting kinetic of the metallic iron in reduced ilmenite was analyzed. The results show that hydrochloride can significantly increase the reaction rate and …

Effect of NH4Cl on the rusting leaching behavior of metallic …

In other words, the accelerated action of NH 3 and Cl − on the corrosion of metallic iron in reduced ilmenite is one of the reasons why NH 4 Cl has a positive influence on the rusting leaching process.

Review of TiO2-Rich Materials Preparation for the

The Australian National Institute of Chemistry researched and developed the reduction-rusting process which can make synthetic rutile be produced on a large scale. With the reduction-rusting process, the ferric oxide in ilmenite is reduced to iron, which gathers rust in water to obtain the rich material containing titanium dioxide.

A STRUCTURAL MODEL FOR THE RUSTING OF REDUCED …

Abstract. In the new commercially followed process for the production of synthetic rutile, metallic iron present in the reduced ilmenite is oxidized to solid iron oxide using NH4Cl …

An electrochemical investigation of the rusting reaction of ilmenite …

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 ...

Leaching studies of alkali roasted bomarilmenite and

The reaction between reduced ilmenite and oxygen in ammonium chloride solutions. Hydrometallurgy, 18 (1987), pp. 21-38. View PDF View article View in Scopus Google Scholar. Gambogi, 2009. ... Investigations on the effect of certain carbonyl compounds on the removal of iron during the rusting of reduced ilmenite. Trans. …

Effect of NH4Cl on the rusting leaching behavior of metallic …

Ilmenite is the primary feedstock for the manufacturing of titanium goods, however it needs to be refined before the usage. Becher is an eco-friendly process for refining ilmenite by rusting metallic iron from reduced ilmenite to separate iron and TiO 2, and NH 4 Cl is the commonly utilized solvent in this method. In the current study, the …

Review of TiO2-Rich Materials Preparation for the

The method first makes a weak reduction for ilmenite placer with refinery coke as reducer to reduce the Fe 3+ in the mine into Fe 2+ at 900–1000 °C, with percent reduction up to over 90%. The reduction charge is cooled to below 80 °C in the rotary cooler with air being isolated, then is discharged to remove the residual refinery coke via ...

Transformation and separation of metallic iron in reduced …

The major mineral phases of reduced ilmenite are M x Ti 3−x O 5 (0 ≤ x≤2, M = Fe, Mg, Al, etc.) and metallic iron. The major mineral phases of corrosion product at …

Titanium Metallurgy | SpringerLink

(2) Reduction-rusting process: ilmenite is reduced by charcoal in the rotary kiln, where the reduction product is the mixture of fine iron, low-valent titanium oxide, and rutile. After rusting by dilute ammonium chloride or dilute hydrochloric acid solution, the iron is taken away by the solution. The product is artificial rutile.

Removal of Metallic Iron from Reduced Ilmenite by

The e ect of stirring speed on the removal of metallic iron from the reduced ilmenite was investigated by varying the impeller speed in the range of 400 to 1000 rpm. The concentration of ...

10.1016/S0304-386X(02)00088-9 | DeepDyve

Aeration rusting is the process where metallic iron, present in reduced ilmenite, is oxidized by air in a suspension of aqueous NH 4 Cl (Becher et al., 1965; Mohandas et al., 1995, 1997, 1998, ; Kumari et al., 2001) . The major functions of the catalyst are reported (Farrow et al., 1987) that it acts as a buffer for hydroxyl ions and …

(PDF) Flow and Reaction Characteristic in a Stirred Reactor …

The reduced ilmenite is used as raw material (as Table 5), the oxygen flow rate is 0.6 m 3 /h, the liquid-solid ratio is 4:1, room temperature, and the reaction time is 2 h for corrosion reaction.

Catalytic removal of iron from reduced ilmenite

Semantic Scholar extracted view of "Catalytic removal of iron from reduced ilmenite" by E. Kumari et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 213,852,209 papers from all fields of science. Search. Sign In Create Free Account.

A STRUCTURAL MODEL FOR THE RUSTING OF REDUCED ILMENITE …

In the new commercially followed process for the production of synthetic rutile, metallic iron present in the reduced ilmenite is oxidized to solid iron oxide using NH4Cl as catalyst. There is necessity for improving the oxidation process, which is very slow in presence of NH4Cl. Attempts were hence made to study the effects of various organic compounds …

Studies on the upgrading of Indian ilmenites to synthetic …

The metallic iron content of reduced ilmenite was removed by rusting in a solution containing NH4Cl. The reduced ilmenite (50 g) was treated with 300 mL of NH4C1 solution. The ilmenite particles were agi­ tated by passing compressed air through the solution. The pH of the solution was adjusted - 4.5 using dil. HC!.

Removal of Metallic Iron from Reduced Ilmenite by …

The reduced ilmenite, obtained from the carbothermic reduction of ilmenite concentrate in a rotary kiln at about 1100 C, contained 62.88% TiO2 and 28.93% Metallic iron. The …

Strengthening of metallic iron rust in reduced ilmenite

The reduced ilmenite, obtained from the carbothermic reduction of ilmenite concentrate in a rotary kiln at about 1100 °C, contained 62.88% TiO2 and 28.93% Metallic iron.

Preparation of synthetic rutile from reduced ilmenite …

The reduced ilmenite was produced by carbothermic reduction of ilmenite concentrate in a rotary kiln at about 1150 °C for approximately 8 h. The ilmenite concentrate used in this plant is a natural weathered beach sand with the main phases of pseudobrookite and ilmenite. ... Becher is an eco-friendly process for refining ilmenite …

Removal of Metallic Iron from Reduced Ilmenite by Aeration …

The reduced ilmenite, obtained from the carbothermic reduction of ilmenite concentrate in a rotary kiln at about 1100 °C, contained 62.88% TiO2 and 28.93% Metallic iron. ... Metallic iron is then oxidized and precipitated from the solution as a slime in an aeration or 'rusting' step in large tanks using 1% ammonium chloride solution at 80 ...

Preparation of synthetic rutile from reduced ilmenite …

DOI: 10.1016/j.cep.2019.107774 Corpus ID: 214485987; Preparation of synthetic rutile from reduced ilmenite through the aeration leaching process @article{Xiang2020PreparationOS, title={Preparation of synthetic rutile from reduced ilmenite through the aeration leaching process}, author={Jun-yi Xiang and Guishang Pei …

Effect of NH4Cl on the rusting leaching behavior of metallic …

@article{Zhou2023EffectON, title={Effect of NH4Cl on the rusting leaching behavior of metallic phase of iron in reduced ilmenite during TiO2 purification: an electrochemical and density-functional theory study}, author={Lei Zhou and Qiuyue Zhao and Guo-zhi Lv and Zhi-he Dou and Wang-zhong Mu and Ting'an Zhang}, …

Catalytic removal of iron from reduced ilmenite | Request PDF

Investigations carried out to accelerate the rusting of reduced ilmenite show that the addition of small quantities of carbonyl compounds such as glyoxal, glucose and sucrose with NH4Cl ...

a structural model for the rusting of reduced ilmenite

a structural model for the rusting of reduced ilmenite - Acta ... EN English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian …

An electrochemical investigation of the rusting reaction of ilmenite …

Effect of NH4Cl on the rusting leaching behavior of metallic phase of iron in reduced ilmenite during TiO2 purification: an electrochemical and density-functional theory study. Lei Zhou Qiuyue Zhao G. Lv Zhi-he Dou W. Mu Ting'an Zhang

Removal of Metallic Iron from Reduced Ilmenite by …

The reduced ilmenite, obtained from the carbothermic reduction of ilmenite concentrate in a rotary kiln at about 1100 C, contained 62.88% TiO 2 and 28.93% Metallic iron. The particle size was about 200 m and the size distribution was uniform. The e ects of NH4Cl and HCl concentrations, stirring speed, and aeration leaching time on the extent of ...

(PDF) Characterization of Ilmenite from Kerala Coastline, …

3.3.2 Oxidative removal of metallic iron from reduced ilmenite . ... Beneficiated ilmenite after rusting contained stil l about 6 – 7 % residual iron in the metallic and . ferrous state.

An electrochemical investigation of the rusting reaction of ilmenite …

Ilmenite is the primary feedstock for the manufacturing of titanium goods, however it needs to be refined before the usage. Becher is an eco-friendly process for refining ilmenite by rusting metallic iron from reduced ilmenite to separate iron and TiO 2, and NH 4 Cl is the commonly utilized solvent in this method. In the current study, the …

Catalytic removal of iron from reduced ilmenite

Ilmenite is the primary feedstock for the manufacturing of titanium goods, however it needs to be refined before the usage. Becher is an eco-friendly process for refining ilmenite by rusting metallic iron from reduced ilmenite to separate iron and TiO 2, and NH 4 Cl is the commonly utilized solvent in this method. In the current study, the …

Flow and Reaction Characteristic in a Stirred Reactor for

The technology for producing artificial rutile by the reduction-rusting method has the advantages of high product quality and less slag. A computational fluid dynamics (CFD) method is used to simulate the solid-liquid suspension and gas-liquid dispersion characteristics in the stirred corrosion reactor. ... The reduced ilmenite is used as raw ...

An electrochemical investigation of the rusting reaction of …

Ammonium chloride is an established and widely used catalyst in the removal of metallic iron from reduced ilmenite. It has the ability to buffer solution, to prevent …