Around 54% of phosphorus (P), 21% of Al 2 O 3, and 61% of SiO 2 can be preliminarily removed from unroasted oolitic hematite ore. Through further dephosphorization with dilute sulfuric acid at room temperature, a high-quality Fe concentrate with 63.3% Fe, 0.04% P, and a Fe recovery rate of 96% was obtained.
The influence of microwave treatment on the liberation of iron ore from the high phosphorus oo-litic iron ore from Aswan region, Egypt was studied. The effect of microwave power, exposure time and grain size on the liberation of iron ore was
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 …
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). ... one can expect that the DR-smelter-BOF steelmaking route is ideal for processing high-phosphorus iron ores. Lower phosphorus in …
High-phosphorus oolitic hematite is a potential iron ore resource. China and Europe have 4・ billion tons and more than 14 billion tons of iron reserves, respectively.1・) Corresponding …
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 P from the …
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 …
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 ...
The oolitic high-phosphorus iron ore is an iron ore with a complicated mineral structure. The minerals in the ore particles are closely associated. As the ore has a high phosphorous level of approximately 1.0 wt%, it could not be employed using the traditional iron and steel-making technological route. To utilize the ore, many researchers have ...
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 …
The iron recovery rate for high-phosphorus iron ore reached 92% with relatively high phosphorus content of pig iron about 0.28%under the reduction temperature of 1450 °C. Although decreasing amplitude of phosphorus content was remarkable(0.9% in raw iron ore vs. 0.28% in pig iron), the molten iron was still not satisfied with the requirement ...
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. … Expand. 18 [PDF] Save. Bio-extraction of phosphorus from goethite ore with alkali addition.
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 through …
Phosphorus is one of the most deleterious elements in iron ore as it follows iron during downstream reduction processes, forming iron phosphides that make steel brittle. …
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 that the minimum thermodynamic …
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%) …
Key words: high phosphorus iron ore fine; gaseous reduction; kinetics; microwave pretreatment Nowadays how to utilize the large deposit of oolitic high-phosphorus ore in Hubei is receiving more and more attention from many iron and steel making en- terprises in China. Researchers in universities and institutes are also seeking effective methods ...
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 invention provides a method for dephosphorization of high-phosphorus iron ore by suspension state oxidation-reduction roasting-acid leaching. The method comprises crushing and grinding high-phosphorus iron ore to obtain ore powder; placing the magnetic concentrate into a heating chamber of a suspension roasting furnace for pre-oxidation roasting, then carrying …
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 …
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 ...
The gasification removal behaviour of phosphorus from high-phosphorus iron ore in the temperature range of 400–900 °C under H 2 reducing and N 2 atmosphere was …
High-phosphorus oolitic hematite is recognized as one of the most refractory iron ores due to the intergrowth of phosphorus and iron, making traditional separation techniques ineffective. Gas-based direct reduction followed by magnetic separation is of significance to realize the efficient recovery of iron from low-grade iron ore, accompanying …
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 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-phosphorus iron ore …
In China, high-phosphorus iron ore, also known as "China Ningxiang type iron ore", is widely distributed in Hubei, Hunan and other regions. It has been found that this kind of iron ore reserves are around 3.805 billion tons, and the Guandian iron ore reserves in Jianshi County, Enshi Prefecture, Hubei Province alone have exceeded 420 million tons.
The spectrophotometer was previously calibrated with standard minerals from a british collection. Phosphorous content of the ore material was 0.18% (w:w) and, therefore, it is considered as a high-phosphorus iron ore. Bacteria were detached from the ore material by shaking in sterile distilled water for a period of 24 h.
The global confirmed reserves of high-phosphorus iron ore exceed 20 billion tons, mainly distributed in countries such as Algeria, China, Kazakhstan, and Nigeria. Due to the abundant ooids, complex composition, fine-grained phosphorus mineral dissemination, low grade and high phosphorus content in this iron ore, it has been recognized by the ...
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 of ventilated oxygen to iron …
Optical microscopy results from a polished cross section of the ore (Fig. 1) show the oolitic structure of the ore, composed of lighter spherical grains in concentric layers embedded in a darker matrix. The presentation of the ore is consistent with the structure of oolitic ores.
An innovative process of coal-based reduction followed by magnetic separation and dephosphorization was developed to simultaneously recover iron and phosphorus from one typical high-phosphorus refractory iron ore. The experimental results showed that the iron minerals in iron ore were reduced to metallic iron during the coal-based reduction and the …
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 ...
The high phosphorous oolitic iron ore used in this study was collected from the Aswan region of Egypt. The area east of Aswan represents the main manifestation of the Cretaceous oolitic ironstone bands of southern Egypt, which are confined to clastic successions belonging to the "Nubian" sandstones, or "Nubia facies" [6]. Fig. 1 and Table 1 show the XRD …
