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.

Dephosphorization of unroasted oolitic ores through

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

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

on journals on dephosphorization of iron ore illia

journals on dephosphorization of iron ore. journals on dephosphorization of iron ore illia. 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.

Direct Dephosphorization from Iron Ore Containing Higher

Keywords: dephosphorization, iron ore, phosphorus, reduction, reaction rate, reaction limit, hydrogen, water vapor, gaseous phosphorus, Fe 2 P JOURNALS FREE ACCESS FULL-TEXT HTML 2014 Volume 100 Issue 2 Pages 325-330

(PDF) Biodephosphorization of iron ores

the fu ngus Aspergillus niger HNA-1 were used to reduce the amount of phosphorus present in iron ore samples from Minas Gerais, Brazil. All these microorganisms were autochthonous to the ore being

The investigation on the middle period dephosphorization

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journals on dephosphorization of iron ore

˜ 60 kg iron ore dephosphorization of steel, Metallurgical and Materials Transactions B, Volume 19, Number 4, 643 ‐648 A Material Flow Analysis of Phosphorus in Japan Matsubae Coal and iron ore are essential raw materials for the production of iron and steel, FeO = iron oxide; De-P = dephosphorization.

Dephosphorization Behavior of High-Phosphorus Oolitic

The dephosphorization mechanism of blast furnace dust and coal slime were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM)-energy dispersive X-ray spectroscopy (EDS). A DRI with 91.88 wt. % iron grade, 88.38% iron recovery and 0.072 wt. % P can be obtained with 30 wt. % blast furnace dust as reductant.

journals on dephosphorization of iron ore

journals on dephosphorization of iron ore. journals on dephosphorization of iron ore illia Study on dephosphorization technology for highphosphorus On Jan 1 2003 J Ji published Study on dephosphorization technology for highphosphorus iron ore 727 Online Solid State Desulphurization of Iron Ore and Empirical . More Details

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

(PDF) Biodephosphorization of iron ores

the fu ngus Aspergillus niger HNA-1 were used to reduce the amount of phosphorus present in iron ore samples from Minas Gerais, Brazil. All these microorganisms were autochthonous to the ore being

Direct Dephosphorization from Iron Ore Containing Higher

Keywords: dephosphorization, iron ore, phosphorus, reduction, reaction rate, reaction limit, hydrogen, water vapor, gaseous phosphorus, Fe 2 P JOURNALS FREE ACCESS FULL-TEXT HTML 2014 Volume 100 Issue 2 Pages 325-330

Optimization of Process Parameters for the IJERT Journal

Jun 10, 2016· Optimization of Process Parameters for the Dephosphorization of iron ore using Nitric Acid written by T. O. Chime, O. D. Onukwuli, I. O. Ani published on 2016/10/06 download full article with reference data and citations

Removal of phosphorus from iron ores by chemical leaching

Dec 01, 2006· 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-leaching, but those occurring in the iron

Metallurgist Volume 64, issue 5-6

Enhancement of Pyro-Hydrometallurgical Technology of Dephosphorization of Brown Iron Ore of the Lisakovsk Field by Hot Leaching Method Authors (first, second and last of 4) L. A. Zainullin

Development of the Continuous Dephosphorization and

Dec 13, 2016· The results confirmed high productivity or a higher rate of dephosphorzation achievable with an increased rate of oxygen blowing and the addition of iron ore. Because of the dephosphorization by low‐basicity slag and the hot recycling of decarburizationslag to dephosphorize the next charge, lime consumption was relatively low.

Comparative Assessment of Phosphorus Removal from Nigeria

The iron ore was found [1] to contain an average of 1.12% phosphorus and after the dephosphorization process, 91.61% phosphorus removal was attained with 1% sulfuric acid after leaching for 20 min at room temperature, during which iron loss was found to be negligible; less than 0.25%. The pH value

Processes for phosphorus removal from iron ore a review

2.1 Phosphate occurrences. Iron ore of high phosphorus content coexists with other minerals in the form of apatite or fluorapatite. Phosphorus is spread on the edge of mineral particles of iron oxide and embedded in quartz or carbonate minerals and a small amount is present in the iron mineral grid (Xia et al., 2011).The most frequent and important constituent of the class of phosphates is

BENEFICIATION, DEPHOSPHORIZATION AND

Nov 30, 2017· BENEFICIATION, DEPHOSPHORIZATION AND DESULPHURIZATION OF AGBAJA IRON ORE. Iron ores are used in blast furnace for the production of pig iron; Agbaja Iron ore has an estimated reserve of over I billion metric tonnes. Unfortunately, this large reserve cannot be utilized for the production of pig iron due to its high sulphur and phosphorus contents.

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.

Technical Report Improvement in Hot-Metal Dephosphorization

ring during dephosphorization, was changed in a range of 0.02 0.42 around a standard value of approximately0.05. Nitrogen was blown from the bottom, and the power density 18) of the stirring by bottom blowing was changed from about 1.6 to 3.6 kW/t. The dephosphori-zation flux was composed only of iron ore and burnt lime, and the

Feasibility Study of Dephosphorization of Slag Generated

Jun 02, 2017· Basic oxygen furnace slag (BOF slag) is an unavoidable by-product of steelmaking process of basic oxygen furnace. The main chemical constituents of BOF slag are CaO, FeO, Al 2 O 3,SiO 2 and MgO. Due to its high metallic value (FeO: 16-20%) and lime content (CaO: 45-50%), it is possible to use in iron making and steelmaking process to replace lime and recover iron and CaO.

Upgrading and dephosphorization of Western Australian iron

The iron concentrate, assaying 94.12wt% Fe and 0.07wt% P at the iron recovery of 96.83% and the dephosphorization rate of 74.08%, is obtained under the optimum conditions. The final product (metal iron powder) after briquetting can be used as the burden for steelmaking by an electric arc furnace to replace scrap steel.

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

Dephosphorization Treatment 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 work were analysed by SEM-EDS and XRD, which showed their oolitic structure and mineral phases.

Direct Dephosphorization from Iron Ore Containing Higher

Keywords: dephosphorization, iron ore, phosphorus, reduction, reaction rate, reaction limit, hydrogen, water vapor, gaseous phosphorus, Fe 2 P JOURNALS FREE ACCESS FULL-TEXT HTML 2014 Volume 100 Issue 2 Pages 325-330

(PDF) DEPHOSPHORIZATION OF OOLITIC GOETHITE IRON ORE

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

Removal of phosphorus from iron ores by chemical leaching

Dec 01, 2006· 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-leaching, but those occurring in the iron

Dephosphorization Treatment of High Phosphorus Iron Ore by

Japan's largest platform for academic e-journals: J-STAGE is a full text database for reviewed academic papers published by Japanese societies Dephosphorization Treatment of High Phosphorus Iron Ore by Pre-reduction, Mechanical Crushing and Screening Methods

Metallurgist Volume 64, issue 5-6

Enhancement of Pyro-Hydrometallurgical Technology of Dephosphorization of Brown Iron Ore of the Lisakovsk Field by Hot Leaching Method Authors (first, second and last of 4) L. A. Zainullin

Development of the Continuous Dephosphorization and

Dec 13, 2016· The results confirmed high productivity or a higher rate of dephosphorzation achievable with an increased rate of oxygen blowing and the addition of iron ore. Because of the dephosphorization by low‐basicity slag and the hot recycling of decarburizationslag to dephosphorize the next charge, lime consumption was relatively low.

BENEFICIATION, DEPHOSPHORIZATION AND DESULPHURIZATION OF

Nov 30, 2017· BENEFICIATION, DEPHOSPHORIZATION AND DESULPHURIZATION OF AGBAJA IRON ORE. Iron ores are used in blast furnace for the production of pig iron; Agbaja Iron ore has an estimated reserve of over I billion metric tonnes. Unfortunately, this large reserve cannot be utilized for the production of pig iron due to its high sulphur and phosphorus contents.

(PDF) Dephosphorization strategies and modeling in oxygen

tensity and ti ming of the flux and iron ore additions. It has been observed that the primary driving factor for dephosphorization in steelmaking is the iron oxide content of slag, rather than

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.

Feasibility Study of Dephosphorization of Slag Generated

Jun 02, 2017· Basic oxygen furnace slag (BOF slag) is an unavoidable by-product of steelmaking process of basic oxygen furnace. The main chemical constituents of BOF slag are CaO, FeO, Al 2 O 3,SiO 2 and MgO. Due to its high metallic value (FeO: 16-20%) and lime content (CaO: 45-50%), it is possible to use in iron making and steelmaking process to replace lime and recover iron and CaO.

An integrated process for the treatment of apatite

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 HNO 3 to produce high‐purity H 3 PO 4.The crude acid obtained is shown to be at least equivalent to, if not better than, the typical wet‐process acid.

Reaction Behavior of Phosphorus in Coal-Based Reduction of

Coal-based reduction followed by magnetic separation is an effective way to recover iron from high phosphorus-containing oolitic hematite ore. Given that high quantities of dephosphorization agent are needed to obtain low phosphorus reduced iron, a novel approach is proposed by the authors. Without prior phosphorus removal, the phosphorus was enriched in the reduced iron during a reduction

Dephosphorization Treatment 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 work were analysed by SEM-EDS and XRD, which showed their oolitic structure and mineral phases.

Strengthening iron enrichment and dephosphorization of

Abstract: The efficient development and utilization of high-phosphorus oolitic hematite is of great strategic significance for the sustainable supply of iron-ore resources in China.In this paper, the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting–leaching process was studied by X-ray diffraction (XRD

An integrated process for the treatment of apatite

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 HNO 3 to produce high‐purity H 3 PO 4.The crude acid obtained is shown to be at least equivalent to, if not better than, the typical wet‐process acid.

(PDF) DEPHOSPHORIZATION OF OOLITIC GOETHITE IRON ORE

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

Dephosphorization Treatment of High Phosphorus Iron Ore by

Japan's largest platform for academic e-journals: J-STAGE is a full text database for reviewed academic papers published by Japanese societies Dephosphorization Treatment of High Phosphorus Iron Ore by Pre-reduction, Mechanical Crushing and Screening Methods

Development of the Continuous Dephosphorization and

Dec 13, 2016· The results confirmed high productivity or a higher rate of dephosphorzation achievable with an increased rate of oxygen blowing and the addition of iron ore. Because of the dephosphorization by low‐basicity slag and the hot recycling of decarburizationslag to dephosphorize the next charge, lime consumption was relatively low.

Hydrometallurgical Process of Dephosphorization of Agbaja

Journal of Asian Scientific Research, 2012, vol. 2, issue 12, 840-855 Abstract: A study on the dephosphorization of Agbaja Iron Ore using hydrometallurgical process has been carried out. The central composite design of 23 response was formulated and used to develop a model equation.

Solid State Desulphurization of Iron Ore and Empirical

dephosphorizing phosphor-containing iron ore using bacteria, giving a yield of above 80% within 3045 days. In countries having high phosphorus-iron ore, the highlighted dephosphorization process is capable of providing a reliable technical support; giving good dephosphorization at low cost.

(PDF) Dephosphorization strategies and modeling in oxygen

tensity and ti ming of the flux and iron ore additions. It has been observed that the primary driving factor for dephosphorization in steelmaking is the iron oxide content of slag, rather than

Feasibility Study of Dephosphorization of Slag Generated

Jun 02, 2017· Basic oxygen furnace slag (BOF slag) is an unavoidable by-product of steelmaking process of basic oxygen furnace. The main chemical constituents of BOF slag are CaO, FeO, Al 2 O 3,SiO 2 and MgO. Due to its high metallic value (FeO: 16-20%) and lime content (CaO: 45-50%), it is possible to use in iron making and steelmaking process to replace lime and recover iron and CaO.

Upgrading and dephosphorization of Western Australian iron

The technology of direct reduction by adding sodium carbonate (Na 2 CO 3 ) and magnetic separation was developed to treat Western Australian high phosphorus iron ore. The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy. It is found that phosphorus exists within limonite in the form of solid solution, which cannot be removed through

Gasification and Migration of Phosphorus from High

Gasification dephosphorization mainly occured from 10 min to 25 min at 1200°C. These findings leads to a new idea on the dephosphorization of a high -phosphorous iron ore, that is, decreasing the reduction temperature to retard melting of iron and simultaneously adding the additives to promote the dephosphorization of fluorapatite.

Effects of Fuel on Gasification Dephosphorization of High

Through using jiuquan bituminous coal, yangquan anthracite, coking coal and charcoal as fuel,under 900 °C simulating the preheat layer of sinter process,research the influence of fuel types and content on gasification dephosphorization.Results show that due to the different volatile matter of coal, the influence on gasification dephosphorization is different, the influence of the highest

Removal of phosphorus from iron ores by chemical leaching

HUANG Jian-ling, YANG Yun-mei, XIE Hong. A study on the dephosphorization of iron ore by phosphorus dissolving agent accompanied with thiobacillus[J]. Journal of Nanjing Forestry University, 1994, 18(2): 25–29.(in Chinese) Google Scholar