Metals | Free Full-Text | Research on Reaction Mechanism of …
— Editors select a small number of articles recently published in the journal that they believe will be particularly interesting to readers, or important in the respective research area. The aim is to provide a snapshot of some of the most exciting work published in the various research areas of the journal.
Dephosphorization of High-Phosphorus Iron Ore Using …
— With the current tendency for development of a low-cost and eco-friendly process, dephosphorization of high-phosphorus iron ore through microbial process with three different sources of Aspergillus niger strains was studied in this study. Results show that the three strains of A. niger could grow well in the broth, and effectively remove ...
Upgrading and dephosphorization of Western Australian iron ore …
— The reduction roasting followed by magnetic separation process is considered to be a suitable method to treat the high-phosphorus oolitic iron ore. Currently, the dephosphorization mechanism of ...
Research on Reaction Mechanism of Vacuum Carbon …
According to the mineral composition characteristics of high-phosphorus iron ore, the reaction mechanism of fluorapatite was investigated using pure substance and gangue under vacuum carbon thermal reduction (VCTR) conditions. The effects of reduction temperature, basicity, and C/O ratio on the metallization ratio, dephosphorization ratio, …
Preparation of Reduced Iron Powder from High-Phosphorus …
— Dephosphorization is essential for utilizing high-phosphorus iron ore (HPIO), and this work prepared reduced iron powder via reductive roasting in a semi-industrial …
DEPHOSPHORIZATION OF KOTON-KARFE IRON ORE BY …
— Dephosphorization of Koton-karfe iron ore Kogi State, Nigeria has been studied. Sulphuric acid was used to leach 355 +250µm and -180 +125µm size fractions, the analysis was carried out using X–Ray fluorescence (XRF) Spectrometer andinductively-coupledplasma optical emission spectroscopy(ICP-OES). The leaching was conducted …
Comprehensive Utilization of Iron and Phosphorus from …
— The iron and phosphorus in high-phosphorus refractory iron ore were successfully recovered using coal-based reduction followed by magnetic separation and …
Dephosphorisation of western australian iron ore by …
— The iron ore sample used in this study typically contained 0.126% phosphorus, was from the Pilbara region of Western Australia. After roasting at 1250, lump ore (P8o 5.6 mm), pellet 1 (grinding to -1.5 mm before pelletisation) and pellet 2 (grinding to -0.15 mm before pelletisation) were leached in solutions with different …
Dephosphorization
— 1.6.6 Dephosphorization. Phosphorus is a typical minor constituent which is in many steels regarded as impurity and restricted to relatively low contents (for instance max 0.03%P). ... In this approach, various kinds of Fe oxide are utilized, e.g., iron ore, sintered ore, and recycled BOF dust, and in some cases, to prevent slag ing, lime ...
Effect of additives on iron recovery and dephosphorization …
— The effect of CaCO3, Na2CO3, and CaF2 on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of Fe3PO7 and apatite was investigated. The results revealed that Na2CO3 had the most significant effect on iron recovery and dephosphorization, followed by CaCO3, the effect …
Dephosphorization of a High−phosphorus Iron Ore by …
The iron concentrate indexes of total Fe grade 65.50%, total Fe recovery 96.31% and P content 0.16% were obtained, which 77.46% of P removed. The experimental results offer guidance for iron extraction and dephosphorization of iron ore in Algeria.
Dephosphorization of high phosphorus oolitic hematite by …
— Dephosphorization process of high phosphorus oolitic iron ore by acid leaching and leaching kinetics were investigated in the paper. The high phosphorus ore ... A process has been proposed for the treatment of apatite concentrate obtained from the dephosphorization of iron ore. In this process, the apatite is acidulated by HNO3 to …
Mixture of ilmenite and high phosphorus iron ore smelted …
— In order to reasonably utilize the abundant resources of high-phosphorus iron ore and ilmenite in China, the technology of top-blown smelting reduction with oxygen enrichment was used to smelt the mixed ore of high-phosphorus iron and ilmenite. The effect, which is related to basicity, reduction temperature, carbon-oxygen ratio and time …
Reaction Behavior of Phosphorus in Coal-Based …
— Without prior phosphorus removal, the phosphorus was enriched in the reduced iron during a reduction process, then high-phosphorus reduced iron was refined to low phosphorus molten iron and …
Iron recovery and dephosphorization behaviors from high …
— With the depletion of high-quality iron ore resources, high-phosphorus oolitic hematite (HPOH) has attracted great attention due to its large reserve and relatively high iron content. However, HPOH is very difficult to be used in ironmaking process due to its …
Combined processing and dephosphorization of brown iron ore …
DOI: 10.17580/or.2024.02.01 Corpus ID: 269666883; Combined processing and dephosphorization of brown iron ore of the Kokbulak deposit @article{Mukhtar2024CombinedPA, title={Combined processing and dephosphorization of brown iron ore of the Kokbulak deposit}, author={A. A. Mukhtar and A. S. Makashev and …
Upgrading and dephosphorization of Western Australian …
— The technology of direct reduction by adding sodium carbonate (Na 2 CO 3) and magnetic separation was developed to treat Western Australian high phosphorus …
Migration behavior of iron and phosphorus during gas …
— In this study, we presented simultaneous enrichment of iron (Fe) and phosphorus (P) to recover P from high-phosphorus iron ore and clarified the migration of …
A new iron recovery and dephosphorization approach from …
— Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for …
Dephosphorization of High-Phosphorus Iron Ore Using
— 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 …
Dephosphorization kinetics of high-P-containing reduced iron …
— Abstract To comprehensively utilize Fe and P in oolitic hematite ore, an innovative method was proposed to enhance P enrichment in the reduced iron during the reduction process. The reduced iron was then converted to low-P-containing molten iron and high-P-containing slag in the presence of CaO–SiO2–FeO–Al2O3 slag. In this …
An innovation for strengthen iron extraction from …
— With the iron ore resource of easy processing decreased, a large amount of refractory iron ore has been mined. ... The method can efficiently extract iron and dephosphorization with a satisfactory Fe recovery and reduce the cost of smelting by reducing the P content from 0.95 % to 0.29 %. It has the worthwhile for application and …
Research on Reaction Mechanism of Vacuum Carbon …
The results showed that when the metallization ratio of pellets reached maximum (95%), the dephosphorization ratio was only 5.6%, thus indicating adverse result. The reduction processes of high-phosphorus iron ore under vacuum and nitrogen environment were, respectively, compared under the optimal condition.
Influence of Sodium Salts on Reduction Roasting of High …
— ABSTRACT The reduction roasting followed by magnetic separation process is considered to be a suitable method to treat the high-phosphorus oolitic iron ore. Currently, the dephosphorization mechanism of additives such as CaCO3, Ca(OH)2, Na2SO4, and Na2CO3 on the reduction roasting of the iron ore in which phosphorus occurs in apatite …
Upgrading and dephosphorization of Western …
tralian iron ore exists within iron minerals in the form of solid solution [1-2]. The dephosphorization of high phosphorus iron ores has been researched in a number of countries and a vari-ety of dephosphorization process has been developed for different phosphorus compounds. The dephosphorization of high phosphorus iron ores from the …
Roasting-induced phase change and its influence on
— 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 phase after …
Dephosphorization Treatment of High Phosphorus Iron Ore …
This paper proposes a novel process for the pre-treatment of high phosphorus iron ore by pre-reduction, air jet milling and screening methods. The dephosphorization behavior was evaluated as a function of such parameters as the milling gas kinetic energy, E k and specific energy consumption, E sp. At a fixed milling gas kinetic energy, the ...
Dephosphorization of a High−phosphorus Iron Ore by …
— The roasting -leaching technology for iron extraction and phosphorus reduction was proposed with a view to achieving efficient utilization of high-phosphorus …
Reaction Behavior of Phosphorus in Coal-Based Reduction …
— Coal-based reduction followed by magnetic separation is an effective way to recover iron from high phosphorus-containing oolitic hematite ore. Given that high quantities of dephosphorization agent are needed to obtain low phosphorus reduced iron, a novel approach is proposed by the authors. Without prior phosphorus removal, the …
Effect of additives on iron recovery and dephosphorization …
— The effect of CaCO 3, Na 2 CO 3, and CaF 2 on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of …
A STUDY OF THE DEPHOSPHORIZATION OF KOTON KARFE IRON ORE …
— a project dissertation submitted to the school of postgraduate studies, ahmadu bello university, zaria. in partial fulfilment for the award of a doctor of philosophy (ph.d) in metallurgical and materials engineering. department of metallurgical and materials engineering faculty of engineering ahmadu bello university, zaria nigeria may, 2014.
Clean production of Fe-based amorphous soft magnetic …
— Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting reduction …
Effect of calcium compounds on direct reduction and
— The increasing demand for iron ore in the world causes the continuous exhaustion of magnetite resources. The utilization of high-phosphorus iron ore becomes the focus. With calcium carbonate (CaCO3), calcium chloride (CaCl2), or calcium sulfate (CaSO4) as additive, the process of direct reduction and phosphorus removal of high …
Thermomagnetic Enrichment and Dephosphorization of Brown Iron Ore …
— Oolitic brown iron ores are of great economic importance because of the vast reserves that exist in the world. However, their high phosphorus content has limited their use in metallurgy. Exciting enrichment methods are essentially unable to decrease the phosphorus content in such ore, since the phosphorus is present in embedded form as …
A new iron recovery and dephosphorization approach from …
— A new iron recovery and dephosphorization approach from high‑phosphorus oolitic iron ore via oxidation roasting-gas-based reduction and magnetic separation …