Iron ores with phosphorus content lower than 0.07% P are commercially desired as they are suitable for use in iron production. As a consequence, a lot of research efforts have been focused on phosphorus removal from high-phosphorus iron ore [20, 24, 32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48] in a bid to reduce the P content …

2.3.2 Alkaline roasting and water washing of iron ore: P removal The iron ore sample was roasted in a muffle furnace under the different NaOH concentrations (10-50 g/kg-ore), various temperatures (100-300°C), and different times (0.5-2 h). The sample roasted was washed with deionized water at the solid-liquid ratio of 1:10 for 30 seconds.

The removal of phosphorus from iron ore by leaching with nitric acid. Hydrometallurgy, 21: 255-275. A hydrometallurgical method for the removal of phosphorus from iron ore is presented. The apatite content ( ~ 1% ) of a Swedish ore is removed ( > 95 % ) by leaching the ore with nitric acid. The iron loss is less than 0.05% …

Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting reduction …

The trends and efficacy of ultrasonic pre-treatment before desliming high phosphorus Australian iron ore fines was investigated in the presented fundamental study. The −1 mm iron ore fines (57.5 wt% Fe, 2.47 wt% Si, 2.15 wt% Al, 0.132 wt% P) were subjected to sonication while the ultrasonic power, duration and pumping direction were …

Phosphorus can be removed from iron ore by very different routes of treatment. The genesis of the reserve, the mineralogy, the cost and sustainability define …

In this study, a combination of alkali roasting and hydrothermal treatment is used as a method of gangue (Si, Al, and P) removal from iron ores as a means to upgrade low-grade iron ore (limonite ...

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 ...

Microbes, over the course of many years, have demonstrated their capacity for phosphate solubilization, which has paved the way for exploring their role in mitigating phosphorus content in iron ore. In the context of this study, our objective was to investigate the feasibility of employing bioleaching as a method for dephosphorizing iron ore ...

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 …

The B. diminuta strain isolated from the surface of iron ore and phosphorus ore can be used as a flotation agent to separate phosphorus and other harmful impurities [27]. B. diminuta can also ...

This research aims to make a preliminary study of wavellite's floatability and to evaluate the reduction of phosphorus content by froth flotation from a Brazilian iron ore with a P content of 0.82%.

The removal of phosphorus from iron ore by leaching with nitric acid. Hydrometallurgy, 21: 255-275. A hydrometallurgical method for the removal of phosphorus from iron ore is presented. The apatite content ( ~ 1% ) of a Swedish ore is removed ( > 95 % ) by leaching the ore with nitric acid. The iron loss is less than 0.05% while the alkali ...

To provide a new method for the dephosphorization of high-phosphorus oolitic iron ore (HPOIO) by reduction roasting, the feasibility of the high-efficiency …

The iron and phosphorus in high-phosphorus refractory iron ore were successfully recovered using coal-based reduction followed by magnetic separation and the dephosphorization process. The total recoveries of Fe and P were 84.41% and 67.23%, respectively. This process represents an effective approach to the utilization of high …

Due to the very high affinity of iron oxides and hydroxides for phosphorus, a phenomenon much exploited in environmental chemistry …

A new method (gas-based separation plus melt separation) has been proposed to remove phosphorus of the high phosphorus iron ore which was 1.25% of phosphorus content and 50.0% of iron content. HSC chemistry package and the coexistence theory of slag structure were adopted for theoretical analysis. The gas …

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., …

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%, …

Process oriented characterisation of oolitic iron concentrate during dephosphorisation by roasting and leaching. Krassimir Ionkov O. Gomes R. Neumann S. Gaydardzhiev Armando Corea de Araujio. Materials Science. 2016. Phosphorus in iron ores is considered as a deleterious component to iron making reflecting in cold …

The removal of phosphorus from iron ore using a low temperature heat treatment with additives, followed by alkaline or water leaching, has been tested by Fisher-White et al., (2009), with phosphorus being lowered from 0.145–0.075%. ... To provide a new method for the dephosphorization of high-phosphorus oolitic iron ore (HPOIO) by …

High-phosphorus iron ore resource is considered a refractory iron ore because of its high-phosphorus content and complex ore phase structure. Therefore, the development of innovative technology to realize the efficient utilization of high-phosphorus iron ore resources is of theoretical and practical significance. Thus, a method for phosphorus …

The result shows that the iron ore concentrate, assaying 62.35% iron and 0.20% phosphorus content are achieved at the overall iron recovery of 90.54% and dephosphorization of 87.42% under the ...

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 …

Effect of calcium compounds on direct reduction and phosphorus removal of high-phosphorus iron ore. Abstract: 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 (CaCO 3), calcium chloride (CaCl 2), or ...

Accepted Manuscript Improvement of Phosphorus Removal from Iron Ore Using Combined Micro-wave Pretreatment and Ultrasonic Treatment Mamdouh Omran, Timo Fabritius, Ahmed M. Elmahdy, Nagui A. Abdel-

The present study is devoted to improvement of the leaching efficiency during phosphorous removal from high phosphorous gravity-magnetic concentrate. Before leaching the concentrate has been subjected to roasting with the addition of either Ca(OH) 2. or CaO. The oolitic iron ore is roasted at 900°C for one hour.

In order to effectively remove the phosphorus from high phosphorus iron ores, while reduce the amount of acid and the iron losses, phosphorus will be removed in …