The effect of hydrochloride on the rusting rate of metallic iron in Panzhihua reduced ilmenite and separation efficiency of titanium and iron by rusting process were studied.The rusting kinetic of…
Aeration leaching was used to obtain synthetic rutile from a 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. The particle size was about 200 μm and the size distribution was uniform. The …
A process based on solid state reduction of iron oxide content of ilmenite with carbon in presence of alkali carbonate catalysts followed by removal of iron content of reduced ilmenite by rusting in NH 4 Cl solution has been investigated for upgrading the Indian ilmenites (Quilon and Orissa grades) to synthetic rutile. The process variables such as …
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.
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.
Download Citation | On Jul 1, 2023, Lei Zhou and others published Effect of NH4Cl on the rusting leaching behavior of metallic phase of iron in reduced ilmenite during TiO2 purification: an ...
Semantic Scholar extracted view of "Effect of NH4Cl on the rusting leaching behavior of metallic phase of iron in reduced ilmenite during TiO2 purification: an …
Download Citation | On Jul 1, 2023, Lei Zhou and others published Effect of NH4Cl on the rusting leaching behavior of metallic phase of iron in reduced ilmenite during TiO2 …
(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.
Semantic Scholar extracted view of "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" by Lei Zhou et al.
An electrochemical investigation to understand the anodic dissolution of reduced ilmenite (RI) has been carried out using a reduced ilmenite carbon paste …
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 …
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 ...
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 ...
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. The corrosion system is a mixture of 2% ammonium chloride and 3% hydrochloric acid.
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.
Reduction, rusting, rutilation and acid wash. In this process ilmenite is subjected to carbothermic reduction followed by rusting in presence of a catalyst. In the rusting step …
The polarization behavior of reduced ilmenite, iron oxide and iron powder carbon paste electrodes was studied [ 29 ], which showed that synthetic rutile and …
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
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
The removal of iron oxide from reduced ilmenite through rusting route to yield synthetic rutile with more than 90% TiO2 is more environment friendly.
Conclusions The leaching of iron from reduced ilmenite at elevated temperatures and pressures has been studied at a fundamental level by electrochemical techniques, and at a practical level by pressure leaching trials. Electrochemical studies showed that the rate of oxidation of iron increases with temper- ature, and that the rate …
A process based on solid state reduction of iron oxide content of ilmenite with carbon in presence of alkali carbonate catalysts followed by removal of iron content of reduced ilmenite by rusting in NH4C1 solution has been investigated for up grading the Indian ilmenites (Qui Ion and Orissa grades) to synthetic rutile.
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 …
In the present work, the corrosion process of reduced ilmenite was investigated, with the emphasis on the effects of corrosion temperature, oxygen flow rate and corrosion time on the transformation of metallic iron. Moreover, the effect of mineral phase of Fe-bearing products on Ti–Fe separation was also investigated.
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
The reaction between reduced ilmenite and oxygen in ammonium chloride solutions. HydrometaUurgy, 18: 21-38. A mechanistic study of the aeration reaction used for removing iron from a reduced ilmenite matrix is described. Using polarization and mixed potential measurements, it was shown that the rate of the …
This paper examines the effectiveness of the method for producing synthetic rutile from ilmenite through pre-oxidation and reductive leaching of pre-oxidized ilmenite in hydrochloric acid. Thermodynamic simulation of the pre-oxidation of ilmenite concentrate was performed to evaluate the phases formed during the process as a function of …
Aeration step, one of the major stages in the Becher process was carried out on reduced Hatinh (Vietnam) ilmenite in NH 4 Cl solution and the effect of several processing parameters were thoroughly investigated including the temperature, time, liquid/solid weight ratio (L/S), air flow rate and concentration of NH 4 Cl solution. The obtained ...
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 Lithuanian česk ...
The results indicated that AASAM could be used as a replacement for the NH4Cl catalyst in the aeration of reduced ilmenite.
The reduced ilmenite is used as raw material (as Table 5), the oxygen flow rate is 0.6 m3/h, the liquid-solid ratio is 4:1, room temperature, and the reaction time is 2 h for corrosion reaction.
Becher process was applied for upgrading Ha Tinh ilmenite concentrate (54-55% TiO2) to synthetic rutile. The process includes reduction of ilmenite concentrate using anthracite coal as reductant, followed by aeration of reduced ilmenite in ammonium chloride solution (NH4Cl). The controlled parameters were temperature and NH4Cl …
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
The traditional aeration leaching process for the upgrading of reduced ilmenite is extremely sluggish and needs significant improvements in its efficiency.
Investigations on the effect of certain carbonyl compounds on the removal of iron during the rusting of reduced ilmenite
