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why is roasting of ilmenite important in ore processing
The final residue after ilmenite roasting with NaOH at 700 °C and the two-stage leaching process is presented in Fig. 16, from which it is evident that the dominant phase is anatase and the remaining impurity is iron, present as ilmenite.
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Sulfuric Acid Leaching of Altered Ilmenite Using Thermal ...
The kinetics of the sulfuric acid leaching of altered ilmenite, mechanisms, and process intensification methods were studied. The effect of changing the chemical composition during grinding was determined. The content of ilmenite and pseudorutile decreased from 5.3% to 3.1% and from 90.2% to 63.1%, respectively. Rutile increased from 4.5% to 28.7%, while a …
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Chemical and morphological transformation of ilmenite ...
In addition to the early flotation and capture of raw mineral to refine its quality, more attentions focus on the pretreatment modification process of ilmenite before hydrochloric leaching, because investigations have proved that oxidation roasting modified the properties of ilmenite and then significantly influenced the leaching results [14,15].
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Titanium Oxide or Titania Pigment by Ilmenite
Titanium dioxide or titania pigment is prepared commercially from ilmenite, an iron-titanium oxide mineral, by the sulfate process.Ilmenite is digested with H2SO4 to yield a titanium sulfate solution. Subsequently, the solution is …
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Up-grading of natural ilmenite ore by combining oxidation ...
Up-grading of natural ilmenite ore by combining oxidation and acid leaching. Rutile (TiO 2) is heavily used in pigments and colorants, and the most abundant source of rutile is ilmenite. Upon oxidation of ilmenite, rutile can be formed with modest energy consumption; furthermore, after leaching, only a few byproducts are formed.
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Minerals | Free Full-Text | Novel Selective Depressant of ...
The products from roughing (roughing ilmenite concentrate) were transferred into a 0.5 L flotation cell (XFD-type flotation apparatus); H 2 SO 4 (2000 g/t), PSSNa (150 g/t) were added in turn and the pulp is stirred 3 min, then the products were collected to complete the first cleaning; the remaining pulp in the flotation cell and ...
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Removal of Metallic Iron from Reduced Ilmenite by …
Abstract: 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% TiO 2 and 28.93% Metallic iron. The particle size was about 200 m and the size distribution was uniform.
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Leaching of ilmenite ores by acidic chloride solutions ...
The direct leaching of Australian ilmenite ore samples with HCl was found to be much more effective with high chloride (Cl −) concentration (~ 500 g/L) in the feed solution. The presence of CaCl 2 was more effective for leaching than that of MgCl 2 and NaCl due to its higher solubility. The effects of pulp density, retention time, HCl concentration, CaCl 2 concentration …
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Leaching behavior of ilmenite with sulfuric acid ...
A study of the rate of dissolution of ilmenite in sulfuric acid solutions has been carried out. The effects of temperature, particle size, stirring speed, and concentration of sulfuric acid on the rate of dissolution of ilmenite has been investigated. Temperature range studied in this investigation was 88° to 115°C, and the Arrhenius activation energy was found to be 64.4 kJ (15.4 kcal) per ...
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EFFECTS OF MICROWAVE RADIATION UPON THE …
Ilmenite Flotation CONC CONC High Intensity MagSep Leaching& Sulphide Flotation Sulphide Dewatering FeTiO3Conc Magnetite Dewatering IlmeniteConc 44.5%Ti02 SulphideConc 5%Ni TAILS TAILS Sulphide Flotation iimenitel,ewatering andDrying Magnetite 63%Fe FIGURE Tellnes ore beneficiation flowsheet.
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A review of mineral processing of ilmenite by flotation ...
Flotation, in most cases, is an effective way to upgrade ilmenite to a commercially qualified level (TiO 2 grade ≥47%) and has been reported frequently ( Chen et al., 2017b, Fan and Rowson, 2000a, Fan and Rowson, 2000b, Liu et al., 2015a, Zhu et al., 2011 ).
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Optimization of Ilmenite Dissolution by Synergistic Effect ...
Acid leaching of ilmenite ore was carried out using HCl acid with a concentration of 37% (w/w) and oxalic acid with a concentration of 99% (w/w) in a 300 cm 3 three-neck glass reactor equipped with a reflux condenser and a mechanical agitator …
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Alkaline pressure leaching of mechanically activated ...
Besides acidic leaching of ilmenite [5][6][7] and alkaline leaching of ilmenite [8], ... which play leading roles in ilmenite flotation, increase by 5.9% and 4.6%, respectively. At the same time ...
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EFFECT OF OXIDATION ROASTING ON ILMENITE …
increase in ilmenite flotation recovery was about 50% at pH values ranging from 4.0 to 4.5. After the roasting of ilmenite at 600 °C, ilmenite was floated with a recovery of
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Optimization of Fine Ilmenite Flotation Performed with ...
Ilmenite is an important raw material for space industry, nautical engineering and medicine. In this study, the effects of pH were investigated by flotation tests. Molecular dynamics simulation, contact angles and Zeta potential measurements were proceeded to explore the flotation mechanism.
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Ilmenite Copper Ore Leaching Flotation Machine for …
Ilmenite Copper Ore Leaching Flotation Machine for Mineral Extraction, Find Details about Flotation Machine, Leaching Flotation Machine from Ilmenite Copper Ore Leaching Flotation Machine for Mineral Extraction - Ganzhou Gelin Mining Machinery Co., Ltd.
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Kinetics of leaching of oxidized and reduced ilmenite in ...
Sample of oxidized ilmenite was then reduced by charcoal for 4 h at 1050 ± 5 °C.The details of the experimental set up for reduction can be found elsewhere (Haseeb et al., 1997).Separate samples of as-received ilmenite (no prior oxidation) were also reduced under otherwise identical conditions to identify the effects of prior oxidation on the extent of …
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Pseudorutile—a New Mineral Intermediate between …
ALTERATION of the mineral ilmenite, FeO·TiO2 in nature involves the processes of oxidation and leaching whereby iron is progressively removed to give a …
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(PDF) Leaching of ilmenite ores by acidic chloride solutions
The optimum conditions for leaching ilmenite in this study were found to be 5–7.5 M HCl solution with a total Cl− concentration of ~ 500 g/L, 3.3% (w/w) pulp density, 70–80 °C and 4–6 h ...
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Leaching and kinetics studies on processing of Abu …
Acid leaching of ilmenite ore was carried out using 1000 cm3 three necked glass reactor provided with a reflux condenser and a mechanical agitator with Teflon-coated stirring rod. A stirring speed of 300 rpm was applied to keep the slurry suspended during the leaching experiment. The desired
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beneficiation of ilmenite by selective leaching
The purpose of ilmenite mineral ilmenite ore is pre-enrichment, ... selective flocculation flotation, carrier flotation, ... Characterization of Ilmenite from Kerala Coastline, India ... 3.3 Beneficiation of Ilmenite Samples ... 3.3.4 Acid leaching of ...
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Kinetics of acid leaching of ilmenite decomposed by KOH ...
The single mineral flotation tests show that after surface dissolution the maximum flotation recovery of ilmenite occurring at a pH of 6.3 is improved from 73% to …
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Sulfation Leaching Treatment ilmenite Concentrate …
Ilmenite charges blended with coke and soda ash were smelted in an electric arc furnace to remove most of the iron as metallic iron and to prepare slags with different FeO levels for sulfation-leaching tests. Pelletized and ground slag charges blended with and without an Na2SO4 additive were reacted with equal proportions of SO2 and O2.
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Ilmenite Chlorination - Metallurgist & Mineral Processing ...
The ilmenite conversion process has been broken down into three general unit operations¬-reduction, smelting, and leaching—as shown in figures 8, 9, and 10. To see what actual flow-rates and energy requirements may be …
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Titanium-enriched ilmenite residue, its application and ...
For example, direct leaching with hydrochloric acid is a simple method of leaching of ilmenite. Specific methods of leaching is described below: 1. The method of direct leaching with hydrochloric acid: A. Ilmenite and hydrochloric acid are mixed in a ratio of 1: 2.5 to 5 ml, and the concentration of hydrochloric acid is 18-30%.
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Process for the electrolytic reductive leaching of ...
The ilmenite ore is admixed with an acidic leach solution in a leaching vessel. The leaching agent is a dilute mineral acid, and preferably is hydrochloric acid, although sulfuric, nitric, phosphoric or hydrofluoric acid may be employed.
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Selective flotation separation of ilmenite from ...
The flotation separation of ilmenite from titanaugite can be performed using the mixed NaOL-DAA in a wide pH range of 5.0–7.0. In this pH range, the recovery of ilmenite remains constant at approximately 90%, while the recovery of titanaugite remains < 25%. The best separation result can be achieved with NaOL-DAA molar ratios of 10:1.
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Sulfuric Acid Leaching of Altered Ilmenite Using Thermal ...
of the efficiency of the leaching process was observ ed. Similar results were obtained when the authors studied the sulfuric acid leaching of ilmenite with the composition of 51% TiO 2, 36.8% FeO, and 4.97% Fe2O3 [17]. It was found that with an increase in acid concentration up to 14 M (79.8 wt%), the rate of the process increased.
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Preparation of titanium dioxide nanostructure from ...
Leaching procedure. The mechanical activation of Kahnooj ilmenite sample was performed by the milling process for 30 min. The leaching experiments were carried out under the following conditions: ore/acid ratio of 10% (w/v) g /mL, diluted sulfuric acid concentration of 45% (v/v), leaching time of 4 h, leaching temperature of 130 °C, and constant stirring rate of 600 rpm.
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Novel Approach for Fine Ilmenite Flotation Using ... - MDPI
Ilmenite disseminated grain size is relatively fine, and it must be finely ground to fully separate ilmenite from gangue and then produce fine-grained minerals, which deteriorates flotation. A novel method using buoyant carriers to improve the recovery of fine ilmenite in froth flotation was introduced in this study. Hydrophobized glass bubbles (HGB) as carrier materials …
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