Unlike previous dephosphorization studies, the present work complies with a concept to recover phosphorus within the utilization of high-phosphorus oolitic iron ores to prepare Fe-P alloy for high-phosphorus steel production.Simultaneous enrichment of iron and phosphorus can be achieved by directly alloying the high-phosphorus oolitic …
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 …
Minerals 2021, 11, 247 4 of 17 Table 3. Chemical composition of apatite ore (mass %). P TFe SiO2 CaO Al2O3 MgO F Cl 17.56 0.012 3.44 53.49 <0.01 <0.01 4.73 0.086 Table 3 states clearly 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 …
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 …
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–SiO 2 –FeO–Al 2 O 3 slag. In this study, the P content of …
The results show that by only adopting traditional magnetization roasting–magnetic separation, an iron ore concentrate containing 57.49% Fe and 1.4% P2O5 at an iron recovery rate of 87.5% and a ...
2.1.2. Phase analysis of iron in ore To ascertain the composition of the iron phase in oolitic hematite, the phase of the iron element in oolitic hematite was analyzed. Iron phase was usually analyzed by magnetic separation, acetic acid treatment, tin chloride and hydrogen chloride treatment, aqua regia treatment and other titration operations.
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%, …
Trans. Nonferrous Met. Soc. China 22(2012) 2806âˆ'2812 Mechanism of phosphorus removal in beneficiation of high phosphorous oolitic hematite by direct reduction roasting with dephosphorization agent XU Cheng-yan, SUN Ti-chang, KOU Jue, LI Yong-li, MO Xiao-lan, TANG Li-gang Key Laboratory of High-Efficient Mining and …
Keywords High-phosphorus oolitic hematite Iron recovery Dephosphorization Gas-based direct reduction Magnetic separation 1 Introduction 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
Oolitic hematite ore with high-phosphorus content is currently recognized as one of the most refractory iron ore resources in the world. ... G. Li, C. Xie and Y. Zhang et al., "Influence of additives on dephosphorization of oolitic hematite by direct reduction process," TMS 2010 — 139th Annual Meeting and Exhibition, Seattle, WA, United ...
Due to the complex mineral phase structure, the dephosphorization of high-phosphorus oolitic iron ore is quite difficult [3], which limits the wide applications in iron and steel metallurgy, because the high P content will lead to "cold brittleness" [22]. However, high-phosphorus oolitic iron ore with high P content is an ideal raw material ...
Bio-leaching was applied by Jiang et al. for the dephosphorization of iron ore (Delvasto et al., 2008, Jiang et al., 2007). For an iron ore bearing 1.12% P, dephosphorization of 86.6% was attained under the conditions of the pyrite addition of 20%, initial pH of 1.7–2.0, and nutrient medium without phosphorus (Jiang et al., 2007).
which indicates that the ore is an acid iron ore [35]. To determine the state of iron within the ore, Table 2 presents the findings from the chemical phase analysis of iron. The primary iron states in the raw ore were identified as hematite and limonite, comprising 45.52% of the total iron content, with a distribution of 92.26%.
In this paper, the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting …
The dephosphorization of high phosphorus iron ore has been researched in many countries, such as physical separation, 6,7,8,9,10) bio-leaching, 11,12) flotation, 13,14) hydrometallurgical process. 15,16) But the oolitic structure of the ore prevents the effective use of physical concentration and flotation separation, and necessitates the use ...
Heavy dependence upon imported iron ore concentrates is one of the most significant challenges for China's pyrometallurgical industry. In China, high-phosphorus oolitic hematite constitutes approximately 11.1% of iron reserves, hence the application of recovering these refractory ores can be considered based on current situation …
The results show that the phosphorus primarily existed in the slag phase 10 min before reduction, and a large amount of phosphorus migrated into iron phase from …
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 …
The dephosphorization of high phosphorus iron ore has been researched in many countries, such as physical separation, 6,7,8,9,10) bio-leaching, 11,12) flotation, 13,14) hydrometallurgical process. 15,16) But the …
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 …
Industry test on phosphorus removal and direct reduction of the "Ningxiang type" high-phosphorus oolitic hematite ore has been carried out in a tunnel kiln on the basis of laboratory experiment. The iron grade and phosphorus content of the initial sample are 42.46% and 0.867%, respectively. The results showed that high-phosphorus oolitic …
China has large reserves of high-phosphorus iron ore resources, with reserves of 7.45 billion tons, accounting for 14.86% of the total reserves of iron ore resources [].These high-phosphorus iron ores are mainly distributed in Hubei, Hunan, Yunnan, Sichuan, Guizhou, Inner Mongolia, and other regions [].Due to the complex …
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 …
In this paper, the process of direct reduction roasting using magnetic separation to produce direct reduction iron (DRI) from high-phosphorus oolitic hematite, using coal slime and blast furnace dust as reductant, is …
The iron ore reserves of 3.72 billion tons, account for approximately 73.5% of the sedimentary iron ore in China (Lu et al., 1994). The high phosphorus oolitic hematite has the characteristics of low-grade iron content and high-level harmful impurities, such as phosphorus and aluminium (Wei, 2010), which limit the development of this oolitic ...
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.
Reduction roasting of high-phosphorus oolitic iron ore (HPOIO) requires the addition of expensive alkali metal compounds to enhance dephosphorization. In this paper, the eggshell waste from the catering industry was used to replace traditional dephosphorization agents, which not only avoided environmental problems caused by …
The technology of direct reduction by adding sodium carbonate (Na2CO3) and magnetic separation was developed to treat Western Australian high phosphorus iron ore. The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy. It is found that phosphorus exists within limonite in the …
Despite the abundant reserves of iron ore resources in China, the overall iron ore is characterized by the behavior of low grade, fine grain size, and high impurities, resulting in the situation of importing large quantities of iron ore from abroad and the unavailability of domestic resources for many years [1,2,3,4].Oolitic hematite ore with a …
A new iron recovery and dephosphorization approach from high‑phosphorus oolitic iron ore via oxidation roasting-gas-based reduction and magnetic separation …
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 …
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 …
Bio-leaching was applied by Jiang et al. for the dephosphorization of iron ore (Delvasto et al., 2008, Jiang et al., 2007). For an iron ore bearing 1.12% P, dephosphorization of 86.6% was attained under the conditions of the pyrite addition of 20%, initial pH of 1.7–2.0, and nutrient medium without phosphorus (Jiang et al., 2007). …
urgent need,1,2) such as oolitic iron ore. The oolitic iron ore is a typical complex resource, which mainly distributes in China, USA, Canada, and Egypt.3–5) The reserves of oolitic iron ore resources in China reach 10 billion tons, which are mainly located in Hubei and Hunan province. The oolitic iron ores in those areas mostly contain high ...
Dephosphorization process of high phosphorus oolitic iron ore by acid leaching and leaching kinetics were investigated in the paper. The high phosphorus ore samples (51%T.Fe, 0.52%P) used in this work were …
