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PDF The removal of phosphorus from iron ore by leaching

The iron loss from the ore can be limited to less than 0.5 .2 Alkali oxide concentration in the ore is also decreased as a result of leaching.3 The leached ore is equally good, or even better than unleached ore, as a sinter feedstock for the production of pig iron.4 The principal reaction of the dephosphorization, or acidulation of apatite, under the conditions of percolation leaching

NTERNATIONAL OURNAL OF SCIENCES AND NGINEERING OL O

Chemical leaching of an iron ore involves the attack on the ore by hydrogen ions which act as reducing agents. The main function of these ions is to reduce the oxide ore to metallic or near metallic state depending on the concentration and nature of the chemical involved. During this process, some iron andponents of the iron ore dissolved in the solution. Chang et al 1999

PDF PROCESS ORIENTED CHARACTERIZATION OF OOLITIC IRON

Phosphorus in iron ores is considered as aponent to iron making reflecting in cold shortness of the produced steel. The present study investigates the phosphorus migration pattern resulting from thermal treatment of an oolitic type

Principles of Extractive Metallurgy

Dephosphorization, Degassing, Deoxidation etc. Combination of all unit steps/processes are resulting in Flow Sheets . Flow sheet for copper extraction process Crushing, Grinding, Floatation are unit processes Roasting, smelting, Blowing, Refining, Electrolysis are Unit processes. Flow sheet for iron and steel extraction process. Flow sheet for Zinc extraction process. Various reactors: a

A hydrometallurgical process for the dephosphorization of

A process is proposed for the dephosphorization of iron ore. The process consists of an integrated treatment for the removal of the phosphorus from the ore by leaching and further processing of the leach solution. Phosphoric acid is extracted by isoamyl alcohol iAmOH and stripped by nitric acid solution.

Beneficiation of Iron Ore Mineral Processing Metallurgy

19/3/2017· Beneficiation of Iron Ore and the treatment ofic iron taconites, stage grinding and wetic separation is standard practice. This also applies to iron ores of the nonic type which after a reducing roast are amenable toic separation.

Dephosphorization Treatment of High Phosphorus Oolitic

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 of chemical leaching.

Beneficiation

In the mining industry or extractive metallurgy, beneficiation is any process that improves benefits the economic value of the ore by removing the gangue minerals, which results in a higher grade product concentrate and a waste stream tailings.

Exploring the possibilities of biological beneficiation of

The high P iron ore employed throughout the study was the rejected fraction from aic separation process. The origin of the ore is the Jangada mine in the region of Minas Gerais, Brazil. This ore underwent a crushing process so its size ranged between 7.0 mm and 0.03 mm with an average size of 2.3 mm. X ray diffraction analyses revealed

DEPHOSPHORIZATION OF OOLITIC GOETHITE IRON ORE BY

DEPHOSPHORIZATION OF OOLITIC GOETHITE IRON ORE . BY ROASTING LEACHING PROCESS * Wen Xuan. 1. Gilvana Gomes de Souza. 2. Krassimir Ionkov. 3. Armando Correa de Araujo . 4. Abstract . Oolitic iron ores have significant economical importance because of their extensive resources in the world. However, their utilisation is often quite limited due to the high content of phosphorus inside. The

Removal of Phosphorus from High Phosphorus Iron Ores in

In the process of resource utilization of high phosphorus iron ores, phosphorus should be removed first. Compared to other dephosphorization methods, selective leaching with acid has special advantages such as high dephosphorization ratio, low iron loss and so on. However, a large amount of acidic wastewater containing phosphorus was produced after acid leaching.

PDF PROCESS ORIENTED CHARACTERIZATION OF OOLITIC IRON

Phosphorus in iron ores is considered as aponent to iron making reflecting in cold shortness of the produced steel. The present study investigates the phosphorus migration pattern resulting from thermal treatment of an oolitic type

Processes for phosphorus removal from iron ore a review

Acid leaching is the most efficient method for removal of phosphorus from iron ore. Among the tested acids, sulfuric acid is the most effective for this purpose. The leaching time is low ~20 minutes and the iron loss is negligible less than 0.25 .

Dephosphorization Treatment of High Phosphorus Oolitic

Dephosphorization process of high phosphorus oolitic iron ore by acid leaching and leachingics were investigated in the paper. The high phosphorus ore samples 51 T.Fe, 0.52 P used in this work were analysed by SEM EDS and XRD, which showed their oolitic structure and mineral phases. Among the three kinds of acids H 2SO 4, HCl and HNO 3, sulfuric acid was the most appropriate one for

Principles of Extractive Metallurgy

Dephosphorization, Degassing, Deoxidation etc. Combination of all unit steps/processes are resulting in Flow Sheets . Flow sheet for copper extraction process Crushing, Grinding, Floatation are unit processes Roasting, smelting, Blowing, Refining, Electrolysis are Unit processes. Flow sheet for iron and steel extraction process. Flow sheet for Zinc extraction process. Various reactors: a

Dissertação apresentada à

Dephosphorization of high phosphorus iron ore has been studied worldwide for several decades. Many efforts have been devoted to physical beneficiation methods of high phosphorus iron ores. Some chemical leaching processes have been reported to reduce the phosphorus content of iron

CN101487081A Dephosphorization method for oolitic high

The invention relates to a high phosphate oolitic iron ore dephosphorization method. The raw ore is roasted at the temperature of between 400 DEG C and 800 DEG C after crushing, high intensityic separation is carried out after ore grinding, and acid leaching is carried out to ore powder by using industrial sulfuric acid or industrial nitric acid or industrial hydrochloric acid with the

Processes for phosphorus removal from iron ore a review

Acid leaching is the most efficient method for removal of phosphorus from iron ore. Among the tested acids, sulfuric acid is the most effective for this purpose. The leaching time is low ~20 minutes and the iron loss is negligible less than 0.25 .

Removal of phosphorus from iron ores by chemical leaching

Abstract 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.

Evaluation of iron loss during the simultaneous acid

Abstract The high levels of phosphorus demand operations of dephosphorization for steel manufacturing steps resulting in high costs. One way to minimize these costs is the removal of phosphorus in the iron ore particles using the acid leaching process however, depending on how the phosphorusplexed in the mineral phase requires the application of additional energy. However,

Optimization of Process Parameters for the

treatment on the acid leaching of iron ore. When the ore contained phosphorus in solid solution in the goethite phase, it was found that thermal treatment of the ore at 12000C caused a structural rearrangement of goethite and facilitated the dissolution of phosphorus in mineral acids. In this study nitric acid is used in the removal of phosphorus from Agbaja iron ore. Standard central

HYDROMETALLURGICAL PROCESS OF

A study on the dephosphorization of Agbaja Iron Ore using hydrometallurgical process has been carried out. Theposite design of 23 response was formulated and used to develop a model equation. The optimized result of the equation using Matlab shows that 97.97 degree of dephosphorization was obtained at 117 minutes leaching time, 0.2M leachant concentration and

Exploring the possibilities of biological beneficiation of

The high P iron ore employed throughout the study was the rejected fraction from aic separation process. The origin of the ore is the Jangada mine in the region of Minas Gerais, Brazil. This ore underwent a crushing process so its size ranged between 7.0 mm and 0.03 mm with an average size of 2.3 mm. X ray diffraction analyses revealed

Evaluation of the Acid Baking Technique to Decrease the

When phosphorus is found in solid solution in the goethite phase, the heat treatment process of the iron ore particles can be an efficient technique to its removal7. Such treatment enables the structural rearrangement of goethite, which is converted into hematite and facilitates the release of the phosphorus to the acid leaching process.

Dephosphorization Treatment of High Phosphorus Oolitic

Dephosphorization process of high phosphorus oolitic iron ore by acid leaching and leachingics were investigated in the paper. The high phosphorus ore samples 51 T.Fe, 0.52 P used in this work were analysed by SEM EDS and XRD, which showed their oolitic structure and mineral phases. Among the three kinds of acids H 2SO 4, HCl and HNO 3, sulfuric acid was the most appropriate one for

Investigation of dephosphorization of brown iron ore

In this study, the beneficiation of high phosphorus siderite ore by acid leaching dephosphorization, alkaline oxide reinforced carbothermic reduction andic separation is investigated. X ray

A hydrometallurgical process for the dephosphorization of

A process is proposed for the dephosphorization of iron ore. The process consists of an integrated treatment for the removal of the phosphorus from the ore by leaching and further processing of the leach solution. Phosphoric acid is extracted by isoamyl alcohol

Evaluation of iron loss during the simultaneous acid

Abstract The high levels of phosphorus demand operations of dephosphorization for steel manufacturing steps resulting in high costs. One way to minimize these costs is the removal of phosphorus in the iron ore particles using the acid leaching process however, depending on how the phosphorusplexed in the mineral phase requires the application of additional energy. However,

Dephosphorization Treatment of High Phosphorus Oolitic

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 of chemical leaching.

PDF The removal of phosphorus from iron ore by leaching

The iron loss from the ore can be limited to less than 0.5 .2 Alkali oxide concentration in the ore is also decreased as a result of leaching.3 The leached ore is equally good, or even better than unleached ore, as a sinter feedstock for the production of pig iron.4 The principal reaction of the dephosphorization, or acidulation of apatite, under the conditions of percolation leaching

Dissertação apresentada à

Dephosphorization of high phosphorus iron ore has been studied worldwide for several decades. Many efforts have been devoted to physical beneficiation methods of high phosphorus iron ores. Some chemical leaching processes have been reported to reduce the phosphorus content of iron

Hematite beneficiation technology,processing of iron

Hematite beneficiation technology. 08 31 20 297 Views icon 0 Hematite beneficiation technology . With the rapid economic development, the iron ore resources of the concentrator are decreasing year by year, and the degree of lean, fine and heterogeneous of selected ore is obviously increasing, the supply conditions areg more and more demanding, the difficulty of sorting is

CN101487081A Dephosphorization method for oolitic high

The invention relates to a high phosphate oolitic iron ore dephosphorization method. The raw ore is roasted at the temperature of between 400 DEG C and 800 DEG C after crushing, high intensityic separation is carried out after ore grinding, and acid leaching is carried out to ore powder by using industrial sulfuric acid or industrial nitric acid or industrial hydrochloric acid with the

Evaluation of iron loss during the simultaneous acid

Abstract The high levels of phosphorus demand operations of dephosphorization for steel manufacturing steps resulting in high costs. One way to minimize these costs is the removal of phosphorus in the iron ore particles using the acid leaching process however, depending on how the phosphorusplexed in the mineral phase requires the application of additional energy. However,

Mechanism of phosphorus removal in beneficiation of high

employed the acid leaching process to dephosphorize the Chengde iron ore, and the results showed that sulfuric acid was more effective in dephosphorization than hydrochloric acid and nitric acid. YI et al found that the reduction roastingreverse flotation process was more effective in the beneficiation of oolitic hematite ore

BENEFICIATION, DEPHOSPHORIZATION AND

4.1 Analysis of beneficiation of Agbaja iron ore 118 4.2 Dephosphorization of Agbaja iron ore using hydrochloric acid 129 4.2.1 Effect of HCl concentration on the percentage degree of dephosphorization of Agbaja iron ore 129 4.2.2 Effect of leaching time on the percentage degree of dephosphorization 134 4.2.3 Effect of particle size on the percentage degree of dephosphorization of Agbaja iron

HYDROMETALLURGICAL PROCESS OF DEPHOSPHORIZATION

A study on the dephosphorization of Agbaja Iron Ore using hydrometallurgical process has been carried out. Theposite design of 23 response was formulated and used to develop a model equation. The optimized result of the equation using Matlab shows that 97.97 degree of dephosphorization was obtained at 117 minutes leaching time, 0.2M leachant concentration and

Dephosphorization an overview ScienceDirect Topics

5/1/2012· The optimum slag volume for use in BOF refining using hot metal without hot metal dephosphorization treatment can be calculated. When the amount of slag is too large, the iron loss in the slag increases and the damage to the refractory of BOF worsens. In addition, severe slag foaming disturbs the refining operation.

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