The conventional methods used for ilmenite ore processing include gravity separation, high-intensity magnetic separation, and electrostatic separation or a combination of them ... Effect of ultrasonic treatment on ilmenite flotation as a function of pH (sodium oleate: 2 × 10 −4 M, ultrasonic time: 3 min, ultrasonic power: 500 W).

In an attempt to increase the rate of carbothermic reduction of ilmenite, several pre- and/or intermediate treatments have been introduced, such as mechanical activation, pre-oxidation, and addition of catalysts (e.g. FeCl 3), to the starting materials of reduction processes [17, 19].However, mechano-thermic reduction of a mixture of …

The effect of microwave radiation upon the mineralogy and magnetic processing of a massive Norwegian ilmenite ore was performed by Kingman et al. [6]. It has been shown that short periods of exposure can cause fracture at grain boundaries, which leads to the formation of inter-granular fractures. ... [11] showed that after 10 min …

14 Citations. Explore all metrics. Abstract. Ilmenite is an essential mineral for the extraction of titanium. Conventional physical separation methods have difficulty …

The present work is devoted to the influence of combined microwave heating at a frequency of 2.45 GHz on the oxidation process of Vietnamese ilmenite ore. In oxidation by this method, the heating rate is high for the first 0.5 h and decreases during subsequent treatment.

In this study, a strategy of calcination treatment on ilmenite ores mixed with manganese ores has been established to introduce Mn into the ilmenite OCs, ... As a result, the Mn-modified ilmenite ore OCs can release O 2 at high temperatures when decreasing the oxygen partial pressure. But more importantly, the reduced OCs can be …

Ilmenite Ore: the ilmenite used in the present study is a natural placer mineral obtained from Abu Ghalaga region in the Eastern Desert in Egypt. Bulk chemical composition of the ilmenite ore in this study was determined using X–ray fluorescence analysis using Pnalytical Axios advanced XRF and is given in Table 1.

The results show that the optimum roasting conditions were a roasting temperature of 500 °C, a roasting time of 210 min, an ilmenite-to- (NH 4) 2 SO 4 mass …

TiO2 production is a key part of Ti metallurgy and Ti recycling, and the process itself has turned out to be energy-consuming and material-consuming. New technologies are needed to utilize complex Ti ores, such as ilmenite, and reduce the carbon footprint of TiO2 extraction. Ammonium sulfate roasting has been revealed as an …

Abstract The main problems with ilmenite flotation in impeller-type flotation machines are the poor flotation behaviour of ilmenite and the negative effect of slimes. These cause high ilmenite losses in tailings even when a large dosage of fatty acid and fuel oil is consumed. In this study, microwave radiation pre-treatment and ilmenite surface …

2.1.1. Ilmenite Ore The ilmenite used in the present study is a natural placer mineral obtained from Abu Ghalaga region in the Eastern Desert in Egypt. Bulk chemical composition of the ilmenite ore in this study was determined using X-ray fluorescence analysis using Pnalytical Axios advanced XRF and is given in table 1.

titanium dioxide and titanium metal. Ilmenite accounts for more than 93% of processed titanium ore, and thus information for titanium ores is presented in the profile to represent the specific mineral ilmenite (Woodruff et al., 2017). Though ilmenite is not used directly in water treatment, iron chlorides produced as a byproduct of

The reduction of ilmenite ore is enhanced by pre-oxidation treatment. The enhancement is attributed to the formation of porous structure during the reduction …

Phase transformations of ilmenite ore during microwave treatment at a frequency of 2.45 GHz under the influence of sucrose. Article. Full-text available. Apr 2022; Oleksandr Myslyvchenko;

9.1.2 Titanium ore purification. Ilmenite and rutile are the most important mineral sources of titanium dioxide pigments; however, it is important to note that these minerals contain other metals in addition to titanium. Depending on the deposits, titanium minerals can contain impurities that must be removed before carrying out the industrial ...

On treatment of normal ilmenite, roasted ilmenite, roasted ilmenite with ZnO or ZnS, with HCl or H 2 SO 4, TiOCl 2 and TiOSO 4 were the titanium based products …

Ilmenite is a black iron-titanium oxide (FeTiO 3) with the main mineral components of hematite, magnetite, pyrite, pyroxene, and amphibole. Ilmenite in placer deposits often contains a large amount of …

Morphological changes with the phase transitions were investigated in detail for the oxidation roasting of Panzhihua ilmenite in air from 873 K to 1173 K (600 °C to 900 °C). It was found that a ...

Pre-oxidation experiment. The objective of the pre-oxidation of ilmenite concentrate is to convert the ilmenite (FeTiO 3) into rutile (TiO 2) and hematite (Fe 2 O 3).Thermodynamic simulation of ...

In MW treatment of ilmenite ore for 60 min, the pseudobrookite (Fe 2 TiO 5) and rutile (TiO 2) phases formed in amounts of 65 and 23%, respectively. However, heating for 60 min up to a temperature of ∼750 °С is insufficient for the …

Chen et al. concluded that microwave treatment of ilmenite ore is a potential highly efficient technique for magnetic separation with low energy consumption. The influence of microwave irradiation on the grindability of gold ores was investigated [12]. It was concluded that microwave assisted grinding produced good results particularly for ...

The reduction of ilmenite ore is enhanced by pre-oxidation treatment. • The enhancement is attributed to the formation of porous structure during the reduction process. • Formation mechanism of porous structure is proposed to explicate the enhancement of reduction for ilmenite. • Pores formation enlarged the particle surface for enhanced ...

Highlights. •. Ilmenite is an iron-titanium mineral but separation from titanaugite is difficult. •. Microwave pre-treatment can selectively promote ilmenite flotation. •. Microwave treatment resulted in loss of Mg 2+ and Ca 2+ ions from titanaugite. •. Optimal microwave conditions were 800 W for 450 s at pH 6.

Ilmenite is the primary ore of titanium, a metal needed to make a variety of high-performance alloys. Most of the ilmenite mined worldwide is used to manufacture titanium dioxide, TiO 2, an important pigment, whiting, and …

For ore A (18.7% hercynite and 32.8% ilmenite) and ore B (9% hercynite and 41.3% ilmenite) poor concentrates containing much less than the required 45% TiO2 have been obtained.

Ilmenite Supply Chain – Full Profile. ilmenite is used, a subsequent step of hydrochloric acid leaching may take place to recover higher grade titanium dioxide. The …

Pulmoddai ilmenite ore, which contains a higher purity of ilmenite, has been extensively mined for many years among the commercially valuable coastal mineral sand deposits in Sri Lanka. ... The process can be categorized into four main stages, namely, acid digestion, hydrolysis, calcination and post-treatment, which are illustrated in Figure …

Phase transformations of two types of iron-based oxides (iron ore and industrial-grade ilmenite) were studied using synchrotron powder diffraction of the samples processed in reducing and oxidizing atmospheres at 1173 K (900 °C) and 1223 K (950 °C), respectively. In iron ore oxidation, the disappearance of the wustite and fayalite phases …

The subsequently magnetic separation trials provided evidence that the recovery rate increased from 44% for raw ore to 72% by microwave treatment. Key words: microwave; ilmenite ore; magnetite; grinding, magnetic separation 1 Introduction Accompanied by the depleting of high grade ore reserves, the utilization of low grade …

Table 5 shows the effects of microwave irradiation treatment on flotation separation of ilmenite-containing ores. It can be seen from Table 5 that microwave irradiation treatment can effectively increase ilmenite flotation recovery (~10–20%) …

A pre-treatment for Oxid-Ilmenite was carried out to enhance its initial reactivity, which can be found elsewhere (Sun et al., 2018). After this pre-treatment, the activated ilmenite ore (denoted as Act-Ilmenite) in its fully oxidized form was employed as the OC for the further studies in this paper.

Ilmenite accounts for more than 93% of processed titanium ore, and thus information for titanium ores is presented in the profile to represent the specific mineral ilmenite (Woodruff et al., 2017). Though ilmenite is not used directly in water treatment, iron chlorides produced as a byproduct of mineral processing can serve as a raw material in ...

DOI: 10.1002/cjce.24432 Corpus ID: 248610215; Oxygen Uncoupling Behaviour for Ilmenite Ore Oxygen Carrier Generated from a Calcination Treatment Mixed with Natural Manganese Ore

After the treatment, Fe 2+ ions on the ilmenite surface are abundantly oxidised to Fe 3+ ions. ... With the continuous consumption of the limited rutile resources, ilmenite ore is becoming a major resource for titanium industries (Belardi, 1997). The conventional methods used for ilmenite ore processing include gravity separation, high ...

With the development of microwave technologies, investigations on the extraction of oxides with the use of microwave irradiation during heat treatment of ilmenite ore were begun. [2, 3]. This ...

It is estimated that by using the microwave process costs could be cut by US$ 50/oz. Kingman and Rowson [11] considered the effect of microwave energy upon the processing of a massive Norwegian ilmenite ore. It was found that large reductions in Bond work index could be obtained after exposure to microwave energy for short periods of time.