A new iron recovery and dephosphorization approach from high‑phosphorus …
Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting – gas-based reduction (ORGR) and magnetic separation process was developed. The underlying …
Increasing Iron and Reducing Phosphorus Grades of Magnetic-Roasted High
The available reserves of high-phosphorus oolitic iron ore located in Western Hubei, China, exceed 2 billion tons. This is a chemical sedimentary iron ore, mainly composed of oolite (more than 60%) [8,9].Specifically, the ore comprises nuclear oolite (quartz or iron material), a collophane girdle, hematite, and a limonite girdle; the …
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 …
Technological Challenges of Phosphorus Removal in High-Phosphorus …
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.
Preparation of Reduced Iron Powder from High Phosphorus Iron Ore…
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 ...
The Behavior of Phosphorus in the …
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 …
Characterization studies on Agbaja iron ore: a high …
Iron ores with phosphorus content lower than 0.07% P are commercially desired as they are suitable for use in iron production. As a consequence, a lot of …
Synchronous Upgrading Iron and Phosphorus Removal from High Phosphorus
Li et al. reported the effect of sodium sulfate on reduction roasting and P removal from high-phosphorus oolitic hematite ore.The results showed that a magnetic concentrate with total iron grade of 92.7% and phosphorus content of 0.09% was produced from an oolitic hematite ore containing 48.96% iron and 1.61% phosphorus, …
Removal of phosphorus-rich phase from high-phosphorous iron ore …
A new approach of removing the phosphorus-rich phase from high-phosphorous iron ore by melt separation at 1573 K in a super- gravity field was investigated. The iron-slag separation by super-gravity resulted in phosphorus being effectively removed from the iron-rich phase and concentrated as a phosphorus-rich …
Influence of Sodium Salts on Reduction Roasting of High-Phosphorus
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 CaCO 3, Ca(OH) 2, Na 2 SO 4, and Na 2 CO 3 on the reduction roasting of the iron ore in which phosphorus …
Phosphorus Removal of High Phosphorous Oolitic Iron Ore …
A process with acid leaching followed by hydrogen-based fluidized reduction and melt separation is presented for recovering DRI (direct reduced iron) from high-phosphorus oolitic hematite in this study, and the aim of this study is to provide theoretical and technical basis for economical and rational use of high phosphorus oolitic iron ores.
Mining Intelligence: World's top iron ore producers
The Australian company produced 276.6 Mt in 2021. #3 BHP Group. BHP, the world's miner and third largest iron ore producer churned out 245.4 Mt of iron …
Synchronous enrichment of phosphorus and iron from a high-phosphorus …
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 …
Green and efficient separation of iron and phosphorus from high …
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 …
Technological Challenges of Phosphorus Removal …
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. …
Technological Challenges of Phosphorus Removal in High-Phosphorus …
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 …
Clean production of Fe-based amorphous soft magnetic …
Clean production of Fe-based amorphous soft magnetic alloys via smelting reduction of high-phosphorus iron ore and apatite Hua Zhang1), Tuoxiao Wang1 ), Guoyang Zhang2 ), Wenjie Wu1), Long Zhao1), Tao Liu1 ),, Shuai Mo1 ), and Hongwei Ni1), 1) The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and …
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 …
Effect of calcium compounds on direct reduction and phosphorus …
The reduction behavior of high-phosphorus iron ore was evaluated as a function of reduction temperature, C/O molar ratio, and CaO addition. High reduction temperature accelerated the reduction of ...
Characterisation of phosphorus and other impurities in …
1. Introduction. Australia's iron ore industry is undergoing a major transformation. Reserves of traditional high-grade ores are becoming depleted while the replacement ore types are lower in grade and sometimes require beneficiation to remove or minimise contaminants such as alumina, silica and phosphorus (Dukino et al., …
Selective recovery of phosphorus from acid leach …
many iron ore production areas, such as West Australia, Brazil, South Africa and Central South of China.1–5 According to the statistical survey, the reserves of high phosphorus iron ore reach 7.45 billion tons in China, and among them more than 4 billion tons was deposited in Hubei province with an average level of 1.0% phosphorus and 50% ...
Slag/metal Separation Process of Gas-reduced Oolitic High-phosphorus …
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 …
Phosphorus removal from high phosphorus oolitic iron ore …
This paper reports the phosphorus removal of high phosphorus oolitic iron ore by acid leaching and its influence factors. The experimental ore is Exi high phosphorus oolitic iron ore with 0.5% phosphorus, 51.7% iron and 0.34% sulphur. After acid leaching, the P content decreases to about 0.07%, the iron loss during acid leaching is about 0.18%, …
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 …
A new iron recovery and dephosphorization approach from high‑phosphorus …
In the traditional roasting process of high-phosphorus iron ore (HPIO), a large amount of sodium or calcium salt needs to be added to enhance iron recovery and dephosphorization, which leads to an ...
XPS and FTIR spectroscopic study on microwave treated high phosphorus …
XPS survey scans of high phosphorus iron ore indicated the presence of Fe, O, Si, Ca and P (Fig. 13, Fig. 14, Fig. 15). It can be seen that the shift in the Fe (2p) peak binding energy corresponds to iron oxide as a main component of the iron ore whereas the shift in the O (1s) peak corresponds to oxygen, phosphate and iron oxides …
A new iron recovery and dephosphorization approach from high‑phosphorus …
Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting–gas-based reduction (ORGR) and magnetic separation process was developed.The underlying …
Thermodynamic analysis of the carbothermic reduction of a high …
A thermodynamic analysis of the carbothermic reduction of high-phosphorus oolitic iron ore (HPOIO) was conducted by the FactSage thermochemical software. The effects of temperature, C/O ratio, additive types, and dosages both on the reduction of fluorapatite and the formation of liquid slag were studied. The results show …
Effect of additives on iron recovery and dephosphorization by reduction
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 Fe 3 PO 7 and apatite was investigated. The results revealed that Na 2 CO 3 had the most significant effect on iron recovery and dephosphorization, followed by CaCO 3, the …
Gasification Removal Behaviour of Phosphorus Compounds …
The gasification removal behaviour of phosphorus from high-phosphorus iron ore is theoretically and experimentally studied in the temperature range of 400–900 …