With the present rates of iron ore consumption, currently unusable, high-phosphorus iron ore deposits are likely to be the iron ores of the future as higher-grade iron ore reserves are depleted. Consequently, the design and timely development of environmentally-benign processes for the simultaneous beneficiation of high …
1. Introduction. Economic growth has entailed the extensive consumption of high-quality iron resources [1].In this context, the utilization of refractory iron ore has generated significant research interest [2].Among the reserves of refractory iron ores, high‑phosphorus oolitic iron ore (HPOIO) have reached 20 billion tons; however, the …
Keywords High-phosphorus iron ore · Characterization · Beneciation · Phosphorus removal 1 Introduction Iron ore is the essential raw material from which metallic iron is extracted. The Fe content in the ore should be at least 25 wt% so that it can be used for steel production. Never-
Gas-based reduction at a slow rate to capture migration route of P from original apatite to reduced iron. A detailed statistical analysis was performed for the distribution of P and Fe. Metallic iron provides a site for gasified P, which inhibits volatilization of P and contributes to P and Fe enrichment.
In this work, an innovation which includes processes of grinding, suspension magnetization roasting, and flotation was proposed for efficient utilizing the High …
Global steel production is growing but high-grade ores have been depleted coupled with the decarbonization of the steel industry. The world has to utilize low-grade ores and to use hydrogen in the reduction process to curb CO 2 emissions. The phosphorus distribution behavior in iron ore pellets reduced by CO-H 2 gas mixtures …
With the present rates of iron ore consumption, currently unusable, high-phosphorus iron ore deposits are likely to be the iron ores of the future as higher-grade iron ore reserves are depleted.
High-phosphorus iron ore was added to the feed bin and sent to the cyclone separator by a feeder. The samples were preheated by a cyclone separator. In the suspension furnace, limonite was heated to a high temperature to remove crystal water and transformed into hematite. Then the raw ore with a high temperature entered the …
High iron and low phosphorus content in the concentrate with high iron recovery could be obtained by the combination of reduction and magnetic separation.[9,10] In addition, Yu et al. investigated how alkaline additives such as Ca(OH) 2 and Na 2 CO 3 used in the carbothermic reduction of high-phosphorus iron ore positively affected …
To provide a new method for the dephosphorization of high-phosphorus oolitic iron ore (HPOIO) by reduction roasting, the feasibility of the high-efficiency separation of iron and phosphorus by reduction roasting and magnetic separation process (RRMSP) without a dephosphorization agent was studied. The results showed that the …
To provide a new method for the dephosphorization of high-phosphorus oolitic iron ore (HPOIO) by reduction roasting, the feasibility of the high-efficiency separation of iron and phosphorus by reduction roasting and magnetic separation process (RRMSP) without a dephosphorization agent was studied. The results showed that the …
Carbon deposition [Boudouard reaction Eqn. (Z)] under CO atmos- phere is considered to be the main reason for no other Issue 9 Phosphorus Removal of High Phosphorus Iron Ore by Gas-Based Reduction and Melt Separation 5 800 400 (b) Point 1 I Table 2 Chemical composition of slag sample and iron sample after melt separation …
Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for …
To understand the migration mechanisms of phosphorus (P) during coal-based reduction, a high-phosphorus oolitic iron ore was reduced by coal under various experimental conditions. The migration characteristics and kinetics of P were investigated by a field-emission electron probe microanalyzer (FE-EPMA) and using the basic …
The bacterium Burkholderia caribensis FeGL03, isolated from a Brazilian high-phosphorus iron ore, was used to mobilize the phosphate contained in the same ore. The phosphate-mobilizing ability of the organism was tested in shake-flask cultures containing sterilized crushed iron ore in a chemically-defined liquid culture medium …
The feasibility of dephosphorization using the flotation process and its mechanism of high-phosphorus oolitic hematite were discussed in this paper. The results showed that phosphorus minerals mainly exist in the form of collophane, which can be divided into three types. Block collophane and band collophane could be effectively …
Phosphorous is an undesired element present in iron ore used in the steel making process. It leads to an increase in overall production cost as well as deteriorated steel quality. …
High-phosphorus iron ore is traditionally dephosphorized by chemical process with inorganic acids. However, this process is not recommended nowadays because of its high cost and consequent environmental pollution. With the current tendency for development of a low-cost and eco-friendly process, dephosphorization of high-phosphorus iron ore ...
The high phosphorus iron ore is ground to a finer size fraction and beneficiated using the flotation process to remove unwanted phosphorus, alumina, silica, and alkalis (Na, K, etc.) and provide a super feed free from impurities for the blast furnace.
The feasibility of dephosphorization using the flotation process and its mechanism of high-phosphorus oolitic hematite were discussed in this paper. The results showed that phosphorus minerals …
The gasification removal behaviour of phosphorus from high-phosphorus iron ore is theoretically and experimentally studied in the temperature range of 400–900 °C under H 2 reducing and N 2 atmospheres. In the first step, thermodynamic analysis is conducted to reveal the gasification and reaction behaviours of common phosphorus …
1. Introduction. With the increasing consumption of high-quality iron ore, realizing the efficient utilization of refractory iron ore resources is of strategic significance for the sustainable development of the iron and steel industry (Qin et al., 2023, Sahu et al., 2023, Yuan et al., 2019).Among refractory iron ores, high-phosphorus oolitic iron ore …
In the present study, roasting-induced phase change and its influence on phosphorus removal via leaching has been investigated for high-phosphorus iron ore. The findings indicate that phosphorus in the ore is associated with goethite and exists mainly in amorphous Fe3PO7 phase. The phosphorus remains in the amorphous …
In this study, direct reduction-magnetic separation process was applied to enrich phosphorus and iron to prepare Fe-P crude alloy from a high phosphorus oolitic hematite ore (HPOH). The results show that at lower temperatures and with absence of any of additives, Fe cannot be effectively recovered because of the oolitic structure is not …
The trends and efficacy of ultrasonic pre-treatment before desliming high phosphorus Australian iron ore fines was investigated in the presented fundamental study. The −1 mm iron ore fines (57.5 wt% Fe, 2.47 wt% Si, 2.15 wt% Al, 0.132 wt% P) were subjected to sonication while the ultrasonic power, duration and pumping direction were …
DOI: 10.1016/j.mineng.2024.108765 Corpus ID: 270221833; Migration behavior of iron and phosphorus during gas-based reduction for high-phosphorus iron ore @article{Ji2024MigrationBO, title={Migration behavior of iron and phosphorus during gas-based reduction for high-phosphorus iron ore}, author={Guangheng Ji and Cihong …
The characterization of high phosphorus iron ore was carried out using X-ray diffraction analysis. It can be noticed that the iron ore sample mainly contains hematite phase with total iron percent 55.7% beside some impurities such as quartz, apatite [Ca 5 (PO 4) 3 F] and kaolinite as shown in Figure 1.
Dephosphorization is essential for utilizing high-phosphorus iron ore (HPIO), and this work prepared reduced iron powder via reductive roasting in a semi-industrial rotary kiln follower by ...
1. Introduction. tion results for the equilibrium partial pressures of P2 under experimental conditions, they inferred that the removed phos-Owing to the growing shortage of high …
Slag/metal separation process of the highly reduced oolitic high-phosphorus iron ore fines was investigated. Samples were prepared using the reduced ore fines (metallization rate: 88%) and powder additives of CaO and Na 2 CO 3.Slag/metal separation behavior tests were conducted using a quenching method and the obtained …
Unbeneficiated magnetitic iron ore was used in this study; the relatively high phosphorus content facilitates the detection via scanning electron microscope with energy-dispersive X-Ray …
