Flotation Dephosphorization of High-Phosphorus Oolitic Ore …
Table 2. Iron phase composition of high-phosphorus oolitic hematite (%). Mineralogy research indicates that oolitic hematite ore belongs to a high-phosphoric-acid orebody. The primary valuable minerals are hematite and limonite, accompanied by small amounts of magnetite and siderite.
اقرأ أكثر
Studying on mineralogical characteristics of a refractory high
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 ...
اقرأ أكثر
Thermal beneficiation of refractory iron ore
Youssef and Morsi tested a low-grade oolitic iron ore from the Aswan region of Egypt, assaying 45.23% Fe ... The RHF process has clearly achieved deep reduction and opens the possibility of treating lower grade refractory iron ore from beneficiation plants. However, its high energy consumption and low productivity are the obstacles to its ...
اقرأ أكثر
Thermally assisted magnetic separation and
Attempts to develop alternative beneficiation strategies to upgrade the iron content in complex low-grade iron ores hold importance considering the depletion of high-grade iron ores at present. Therefore, the present work was focussed on the enhancement of magnetic separation of a low-grade hematite iron ore using thermal treatment.
اقرأ أكثر
Amenability for processing of oolitic iron ore concentrate for
The oolitic gravity magnetic (GM) iron concentrate was supplied by the Lisakovsky iron ore beneficiation plant in Kazakhstan. The plant flowsheet involves ore …
اقرأ أكثر
BenefIciation of an Oolitic-Iron ORE by Magnetization …
In this study, the beneficiation of an Oolitic-iron ore (containing 45.46wt% Fe2O3) with magnetization roasting by non-coking coal (containing 62.1wt% fixed carbon) under a …
اقرأ أكثر
Beneficiation of a low-grade, hematite-magnetite ore in China
8. In China, most reserves of rich iron ores have now been depleted and sustainable development of low-grade iron ores has become a critical discussion topic in the mining industry today. The aim of this study was to evaluate the applicability of beneficiating a low-grade, hematite-magnetite ore (assaying 18.64% Fe) for subsequent …
اقرأ أكثر
Beneficiation studies of a difficult to treat iron ore using
1. Introduction. The processing and utilization of iron ores are intimately linked to their mineralogical characteristics, liberation pattern, and the nature of inclusion of the impurities such as SiO 2, Al 2 O 3, P and S.The goethitic, oolitic and wad type ores containing high silica and alumina are very difficult to process by conventional …
اقرأ أكثر
Selective Reduction of Iron and Phosphorus from Oolitic Ore
The proved reserves of oolitic rocks in China correspond to nearly 10% of the global reserves of iron ore . The Bakcharsk deposit (28.7 billion tons) is one of the largest deposits of iron ore in Russia and the world . The genesis of most of these rocks determines the high (up to 0.9 wt % and higher) phosphorus content in oolites.
اقرأ أكثر
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 …
اقرأ أكثر
BenefIciation of an Oolitic-Iron ORE by Magnetization …
In this study, the beneficiation of an Oolitic-iron ore (containing 45.46wt% Low-grade iron ores contain many impurities and are difficult to upgrade to make appropriate concentrates for the blast furnace (BF) or direct reduction (DR) technologies. In this study, the beneficiation of an Oolitic-iron ore (containing 45.46wt% ...
اقرأ أكثر
(PDF) Beneficiation of Oolitic Iron Ore Sourced …
Oolitic iron ore is one of the most important iron resources. This paper reports the recovery of iron from high phosphorus oolitic iron ore using coal-based reduction and magnetic...
اقرأ أكثر
Beneficiation of Low-Grade Dilband Iron Ore by Reduction …
This research is aimed at the up-gradation of indigenous Pakistani iron ore, i.e., Dilband iron ore (hematite), by utilizing common metallurgical processes. First, the magnetic properties of the ore were determined. Initially, the iron ore samples contained 34 wt. % Fe in addition to other gangue materials. Therefore, the ore was subjected to a …
اقرأ أكثر
A review on the enrichment of iron values of low-grade Iron ore
On the other hand, the oolitic iron ore shows better reduction within the range of 550-650 • C, beyond which it has the reverse effect [13]. ... In the process of iron ore beneficiation, a ...
اقرأ أكثر
A review on the characterisation and processing of oolitic …
Oolitic iron ores are a distinctive subset of iron ore deposits, and are characterised by their spherical grains composed of concentric layers containing …
اقرأ أكثر
Beneficiation of Oolitic Iron Ores
Accordingly, Hatch and Ironstone are developing a new pyrometallurgical process (Hatch Ironstone Chloride Segregation) to produce metallic iron from high silica and high …
اقرأ أكثر
Recovery of iron from high phosphorus oolitic iron ore …
Oolitic iron ore is one of the most important iron resources. This paper reports the recovery of iron from high phosphorus oolitic iron ore using coal-based reduction and magnetic separation. The influences of reduction temperature, reduction time, C/O mole ratio, and CaO content on the metallization degree and iron recovery were …
اقرأ أكثر
Iron Extraction From Oolitic Iron Ore by a Deep Reduction …
A nearly mono-phased product of iron powder can be extrac- ted from the Xuanlong-type oolitic iron ore by a process of deep-reduction and subsequent wet mill- ing and magnetic separation. The optimized deep-re- duction condition is 1200 -C and 60 min with coal content of 30% in the ore-coal mixture.
اقرأ أكثر
Thermally assisted magnetic separation and
The experiments in WHIMS were carried out in order to understand the role of thermal treatment on the magnetic separation of the iron ore. Initially, the samples thermally treated at temperatures 500, 600, 700, and 800 °C for a fixed time interval of 30 min were undergone WHIMS at different magnetic intensities such as 0.77, 1.05, 1.18 …
اقرأ أكثر
Reduction in fossil fuel consumption by exploiting …
Various beneficiation methods were tried to recover the iron values from the finely disseminated and complex mineral composition of the oolitic iron (48.3% Fe(T)) of Hebei Province and Ningxiang to generate a concentrate of 57.10% Fe(T) to 62.74% Fe(T) with a recovery of 46.8–87% using high-intensity magnetic separation (HIMS) …
اقرأ أكثر
(PDF) Experimental study on the beneficiation of low-grade iron ore …
In this study, the beneficiation of an Oolitic-iron ore (containing 45.46wt% Fe2O3) with magnetization roasting by non-coking coal (containing 62.1wt% fixed carbon) under a stream of argon gas was investigated. Then, a 2500 Gaussian magnet was used for dry magnetic separation method. The effects of roasting time, ore particle size and reaction ...
اقرأ أكثر
Formation and characterization of metallic iron grains in
To reveal the formation and characteristics of metallic iron grains in coal-based reduction, oolitic iron ore was isothermally reduced in various reduction times at various reduction temperatures. The microstructure and size of the metallic iron phase were investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy, …
اقرأ أكثر
Mechanism of phosphorus removal in beneficiation of high …
High phosphorous oolitic hematite ore is one of typical intractable iron ores in China, and the conventional beneficiation methods are found to be impracticable to remove phosphorus from the ore ...
اقرأ أكثر
Beneficiation of an iron ore fines by magnetization roasting …
Semantic Scholar extracted view of "Beneficiation of an iron ore fines by magnetization roasting and magnetic separation" by Yu Jianwen et al. ... Suspension roasting followed by magnetic separation is a promising method to upgrade oolitic hematite ore. An oolitic hematite ore was roasted using suspension roasting technology at …
اقرأ أكثر
Microscopic liberation mechanisms of oolitic iron ore
Microwave liberation is a promising method for beneficiation of oolitic hematite but has not been used in industrial production. This is because the specific microwave energy requirements for iron ...
اقرأ أكثر
Phase transformation in suspension roasting of oolitic …
Fig. 2 Optical image of oolitic iron ore 2.2 Methods The iron ore was roasted in a suspension roasting furnace designed by Northeastern University. The schematic diagram of suspension roasting furnace is shown in Fig. 3. The iron ore samples were crushed and ground to 80% passing 0.074 mm sieve pore size. A 40% H2−60% N2 gas mixture was …
اقرأ أكثر
Effects of sodium salts on reduction roasting and Fe–P separation …
A magnetic concentrate with total iron grade of 92.7% and phosphorus content of 0.09% was obtained from an oolitic hematite ore containing 48.96% iron and 1.61% phosphorus when reduced in the presence of 7.5% sodium sulfate and 1.5% borax and wet magnetic separated under the proper conditions.
اقرأ أكثر
(PDF) Beneficiation of Oolitic Iron Ore Sourced from Gara …
A process involving coal-based direct reduction followed by wet low-intensity magnetic separation is presented in this paper with the objective of promoting the Fe content and …
اقرأ أكثر
Phase transformation during roasting process and magnetic beneficiation …
DOI: 10.1016/J.VACUUM.2017.09.029 Corpus ID: 103764889; Phase transformation during roasting process and magnetic beneficiation of oolitic-iron ores @article{Peng2017PhaseTD, title={Phase transformation during roasting process and magnetic beneficiation of oolitic-iron ores}, author={Tiefeng Peng and X. D. Gao and …
اقرأ أكثر