Journals On Dephosphorization Of Iron Ore
A new way to efficient utilization of eggshell waste: As green
Semantic Scholar extracted view of "A new way to efficient utilization of eggshell waste: As green dephosphorization agent and accelerator for reduction roasting of high-phosphorus oolitic iron ore" by Shichao Wu et al.
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 …
Dephosphorisation of western australian iron ore by …
The technology of direct reduction by adding sodium carbonate (Na2CO3) and magnetic separation was developed to treat Western Australian high phosphorus iron ore.
Journal of Chemical Technology & Biotechnology
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 produce high-purity H3PO4. ...
Green and efficient separation of iron and phosphorus from …
To provide a new method for the dephosphorization of high-phosphorus oolitic iron ore (HPOIO) by reduction roasting, the feasibility of the high-efficiency …
Gasification Removal Behaviour of Phosphorus Compounds …
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 …
A new iron recovery and dephosphorization approach from …
The results showed that the powdery reduced iron produced contained 91.37% iron and 0.14% phosphorus, and the iron recovery was 92.81%, which is an …
Dephosphorization of high phosphorus oolitic
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 … Expand
Direct Reduction of High-phosphorus Oolitic Hematite Ore …
Direct reduction of high-phosphorus oolitic hematite ore based on biomass pyrolysis gases (CO, H 2, and CH 4), tar, and char was conducted to investigate the effects of reduction temperature, iron ore-biomass mass ratio, and reduction time on the metallization rale.In addition, the effect of particle size on the dephosphorization and …
Processes for phosphorus removal from iron ore
There are many citations in literature on the reduction of phosphorus in iron ore through anionic flotation, using a fatty acid as collector and sodium silicate as a depressant of iron oxides, when the mainphosphorus-bearing mineral is apatite (Ranjbar, 2002 RANJBAR, M. Dephosphorization of iranian iron oxide fines by flotation. Erzmetall, v ...
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 …
Removal of phosphorus from iron ores by chemical leaching
Alkali-leaching and acid-leaching were proposed for the dephosphorization of Changde iron ore, which contains an average of 1.12% for phosphorus content. Sodium hydroxide, sulfuriced, hydrochloric and nitric acids were used for the preparation of leach solutions. The results show that phosphorus occurring as apatite phase could be removed by alkali …
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 …
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 …
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 …
Characterisation of phosphorus and other impurities in …
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. ... (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron recovery and dephosphorization from HPOIO by …
Optimization of Process Parameters for the Dephosphorization of iron …
An attempt has been made in this study to optimize the process variables for the dephosphorization of iron ore using nitric acid. Standard central composite design with 2 full factorial was used to develop the model. The model was optimized using
Dephosphorization kinetics of high-P-containing reduced iron …
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 …
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 of CaF2 was …
Dephosphorization behavior of reduced iron and the …
Reduced iron (1.74% P) is produced from oolitic hematite ore by coal-based reduction and magnetic separation. To realize the comprehensive utilization of Fe and P, the dephosphorization behavior of the reduced iron is investigated in the presence of CaO–SiO 2 –FeO–Al 2 O 3 slag. The P content of the final iron and the P 2 O 5 content …
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 simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting–gas-based reduction (ORGR) and magnetic separation process was developed.The underlying …
Dephosphorization of a High−phosphorus Iron Ore by …
Dephosphorization of a High−phosphorus Iron Ore by Magnetic Roasting−leaching Process. WANG Shaoxing 1, NING Guodong 1, LIU Yingzhi 1,*,,, LI Yanjun 2, 3. 1. …
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 …
Dephosphorization of unroasted oolitic ores through alkaline …
The present study of phosphorus removal from an unroasted iron ore via alkaline leaching method examined the possibility of dephosphorization from goethite ore at low temperature. The iron ore concentrate used in this study is an oolitic type of iron ore consisting primarily of goethite, in which phosphorus does not form a discrete mineral ...
Upgrading and dephosphorization of Western Australian iron ore …
The technology of direct reduction by adding sodium carbonate (Na2CO3) and magnetic separation was developed to treat Western Australian high phosphorus iron ore.
Comprehensive Utilization of Iron and Phosphorus from …
An innovative process of coal-based reduction followed by magnetic separation and dephosphorization was developed to simultaneously recover iron and …
Dephosphorization behavior of reduced iron and the …
Reduced iron (1.74% P) is produced from oolitic hematite ore by coal-based reduction and magnetic separation. To realize the comprehensive utilization of Fe and P, the …
Upgrading and dephosphorization of Western Australian …
The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy. It is found that phosphorus exists within limonite in …
Dephosphorisation of western australian iron ore by …
More than 80% of Western Australian iron ore contains an average of 0.15% phosphorus, and attracts a penalty due to its high level of phosphorus when …
Removal of Phosphorus From High Phosphorus Iron Ores …
After drying, the dephosphorization iron ore sample was obtained. The P content of all samples including high phosphorus iron ore was analyzed by bismuth- phosphomolybdenum blue spectrophotometric method (JH-722N, Shanghai Qing Hua Science and Tech- nology Instrument Co Ltd China). 2 Results and Discussion 2. 1 On …
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 ...
Dephosphorization of a High−phosphorus Iron Ore by …
In response to the characteristics of high-phosphorus iron ore, which the complex symbiotic relationship between iron minerals and phosphate minerals in high-phosphorus iron ore and the difficulty in efficient utilization through conventional beneficiation methods. The roasting -leaching technology for iron extraction and phosphorus reduction was …
Dephosphorization kinetics of high-P-containing reduced …
In this study, the P content of the final iron after 0–1,800 s dephosphorization was investigated at different slag composition conditions, and the dephosphorization …
Metals
The pre-dephosphorization of reduced iron was performed at 1873 K, indicating a higher basicity or FetO content of CaO-based slag was beneficial to dephosphorization of the reduced iron. Coal-based reduction followed by magnetic separation is an effective way to recover iron from high phosphorus-containing oolitic …
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 ...