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Phosphorus is a major contaminant in steelmaking and current specifications for iron ore, the feedstock used in steelmaking, requires ores averaging less than 0.08% P (bulk). In Australia, the majority of iron ore feedstock production is a blend of low-P (<0.05% P) hematite-rich ores and more common high-P (>0.10% P) goethite-rich ores.
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 destroyed. In contrast, …
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 Technology, Wuhan 430081, …
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 being …
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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 mechanism was investigated …
The efficient development and utilization of high-phosphorus oolitic hematite is of great strategic significance for the sustainable supply of iron-ore resources in China. In this paper, the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting–leaching process was studied by X-ray …
Coarser particles exhibited more fractures than fine particles when the same microwave power and residence time were applied [34,35,54,59]. Omran et al. (2014) demonstrated that iron ore with a ...
Key words: high-phosphorus iron ore; direct reduction; calcium compounds; phosphorus removal; calcium phosphate tribasic Cite this article as: WU Shi-chao, LI Zheng-yao, SUN Ti-chang, LI Xiao-hui, XU Cheng-yan. Effect of calcium compounds on direct reduction and phosphorus removal of high-phosphorus iron ore [J]. Journal of Central South
Developing the innovative technology for efficient utilization of high-phosphate iron ore was the inevitable choice of resource strategy. In this paper, exploring a new method of gasification ...
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. The desired phosphorus content in iron ores used in steel making is < 0.1%. Numerous beneficiation studies are mentioned in the literature; however, there is no commercial scale …
Approximately 50% of the 10Mtpa–12Mtpa ore produced is processed at the mining area plants and the remainder at Point Central. SNIM markets several grades: 0mm to 90mm and 8mm to 30mm lump ores, sinter …
In this study, a high-phosphorus oolitic iron ore containing 44.70% Fe and 1.56% P from western Hubei of China was collected as the sample. The chemical composition, mineral composition, structure characteristics, dissemination characteristics, and iron and phosphorus occurrence state were carried out to investigate the mineralogical characteristics of the high …
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 spectroscopy (SEM-EDS). Table 1 …
The high-phosphorus oolitic hematite ore is embedded with extremely fine grains, with an uneven distribution and a high content of harmful impurities. Iron oxides are intercalated with …
The addition of iron is a convenient way for removing phosphorus from wastewater, but this is often considered to limit phosphorus recovery. Struvite precipitation is currently used to recover phosphorus, and this approach has attracted much interest. However, it requires the use of enhanced biological phosphorus removal (EBPR). EBPR is not yet …
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 speciation ...
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., 2000).The phosphorus content of …
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 gangue is composed of fine …
[1] [2] [3][4][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 ...
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 occurs in apatite have ...
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 increase in production costs. In this paper, the co-reduction roasting followed by magnetic separation process was designed to realize the full ...
Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron …
with gangue minerals, which cause iron and phosphorus to be difficult to separate. High-phosphorus iron ore is a world-recognized complex refractory iron ore. 10) On account of the above-mentioned difficulties, in recent years, experiments using the high-phosphorus iron ore have been carried out to improve the iron grade while considering ...
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 compounds, namely P 4 O …
Due to the continuous development of iron and steel industry, high-quality iron ore is rapidly decreasing year after year. Therefore, some low-grade iron ores turn out to be …
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 (HPOIO) has …
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 Xiao and Xu …
G. Li, S. Zhang, and M. Rao et al., "Effects of sodium salts on reduction roasting and Fe–P separation of high-phosphorus oolitic hematite ore," Int. J. Miner.Process. 2013, 124: 26–34.. Article Google Scholar . S. Weissberger and Y. Zimmels, "Studies on concentration and direct reduction of the Ramim iron ore," Int. J. Miner.
Due to the continuous development of iron and steel industry, high-quality iron ore is rapidly decreasing year after year. Therefore, some low-grade iron ores turn out to be alternative options of steel companies [1, 2].Among them, high-phosphorus oolitic hematite (HPOH) is a competitive choice since it has a relatively high iron content (average 52%) and …
