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Selective Liberation of High-Phosphorous Oolitic Hematite

As a typical refractory iron ore, high-phosphorus oolitic hematite is distributed widely and is an abundant resource worldwide. There are approximately 30–40 billion tons of high-phosphorus oolitic hematite ores in China, but commercial exploitation and utilization have not been achieved [1–4].

Dephosphorization of high phosphorus oolitic hematite by

Aug 01, 2017 The high phosphorus oolitic hematite has the characteristics of low-grade iron content and high-level harmful impurities, such as phosphorus and aluminium,which limit the development of this oolitic iron ore. In high phosphorus oolitic hematite, phosphorus is mainly in the form of apatite, where the particle size of the crystal is very fine

New Methods for High Phosphorus Oolitic Hematite

characteristics of high phosphorus oolitic hematite were studied firstly. Based on which, the new methods of high phosphorus hematite used in the ‘solid state reduction by rotary hearth furnace magnetic separation’ and iron nugget by rotary hearth furnace

Enhance the carbothermic reduction of high phosphorus

Feb 06, 2019 The reduction of high phosphorus oolitic hematite, especially for the accumulation and growth of iron played an important role in subsequent magnetic separation, the influence of

Preparation of Iron Carbide from High Phosphorus Oolitic

In order to find a new way to utilize the high phosphorus oolitic hematite ore as raw material for steelmaking, the reduction and carburization of high phosphorus oolitic hematite by the gas of CH4-H2 were studied. High phosphorus oolitic hematite, reduction and carburization products were investigated by the means of XRD and scanning electron microscope.

Development of Technologies for High Phosphorus Oolitic

High phosphorus oolitic hematite deposit is a kind of refractory iron ore resource of huge amount. At present, it is difficult to be utilised by traditional physical and chemical technology

Dephosphorization Behavior of High-Phosphorus Oolitic

The program not only used blast furnace dust but also recovered iron from blast furnace dust and high-phosphorus oolitic hematite. The analysis results revealed that phosphorus is distributed in gangue mineral and fluorapatite when blast furnace dust is used as reductant. Phosphorus-bearing minerals were not reduced to phosphorus element when

Mineralogy, geochemistry and the origin of high-phosphorus

The main issue with oolitic ores is that they not only contain high levels of phosphorus, but that the phosphorus is finely disseminated through the ore in chemical combination with the iron oxides.In oolites that contain calcium and iron occurring as iron oxides (e.g. hematite or magnetite), phosphorus can exist as a minor component in the

Mechanism of phosphorus removal in beneficiation of high

high phosphorus oolitic hematite, which is one of the most refractory ores in China. One ninth of China’s iron ore resources are oolitic hematite, in which 30−40 billion tons are high phosphorus oolitic hematite. Therefore, the studying and utilization of these resources has important strategic significance to relieve the contradiction

Oolite Wikipedia

Oolite or oölite (egg stone) is a sedimentary rock formed from ooids, spherical grains composed of concentric layers.The name derives from the Ancient Greek word ᾠόν for egg.Strictly, oolites consist of ooids of diameter 0.25–2 millimetres; rocks composed of ooids larger than 2 mm are called pisolites.The term oolith can refer to oolite or individual ooids.

Selective Liberation of High-Phosphorous Oolitic Hematite

As a typical refractory iron ore, high-phosphorus oolitic hematite is distributed widely and is an abundant resource worldwide. There are approximately 30–40 billion tons of high-phosphorus oolitic hematite ores in China, but commercial exploitation and

Selective Liberation of High-Phosphorous Oolitic Hematite

The results indicated that microwave processing can reduce the mechanical strength of oolitic hematite and improve the liberation of hematite, and acid leaching can improve the microwave-assisted liberation efficiency and reduce the content of phosphorus in the grinding product.

New Methods for High Phosphorus Oolitic Hematite

characteristics of high phosphorus oolitic hematite were studied firstly. Based on which, the new methods of high phosphorus hematite used in the ‘solid state reduction by rotary hearth furnace magnetic separation’ and iron nugget by rotary hearth furnace

Development of Technologies for High Phosphorus Oolitic

High phosphorus oolitic hematite deposit is a kind of refractory iron ore resource of huge amount. At present, it is difficult to be utilised by traditional physical and chemical technology

Reduction Process of High Phosphorus Oolitic Hematite

The changing characteristics of iron mineral along with the reduction time in reduction of a high phosphorus oolitic hematite by carbon were discussed in the paper. The grain growth of metallic iron was investigated in detail. The results showed that the iron mineral in reduction of the oolitic hematite changed as Fe2O3→Fe3O4→FeO→Fe, and finally was reduced to metallic iron.

Preparation of Iron Carbide from High Phosphorus Oolitic

In order to find a new way to utilize the high phosphorus oolitic hematite ore as raw material for steelmaking, the reduction and carburization of high phosphorus oolitic hematite by the gas of CH4-H2 were studied. High phosphorus oolitic hematite, reduction and carburization products were investigated by the means of XRD and scanning electron microscope.

Study on Phosphorus Removal of High-Phosphorus Oolitic

The results showed that high-phosphorus oolitic hematite could be exploited on industrial scale, with the new process direct reduction roasting grinding magnetic separation, and that the

Dephosphorization Behavior of High-Phosphorus Oolitic

The program not only used blast furnace dust but also recovered iron from blast furnace dust and high-phosphorus oolitic hematite. The analysis results revealed that phosphorus is distributed in gangue mineral and fluorapatite when blast furnace dust is used as reductant. Phosphorus-bearing minerals were not reduced to phosphorus element when

Selective Liberation of High-Phosphorous Oolitic Hematite

The results indicated that microwave processing can reduce the mechanical strength of oolitic hematite and improve the liberation of hematite, and acid leaching can improve the microwave-assisted liberation efficiency and reduce the content of phosphorus in

New Methods for High Phosphorus Oolitic Hematite

characteristics of high phosphorus oolitic hematite were studied firstly. Based on which, the new methods of high phosphorus hematite used in the ‘solid state reduction by rotary hearth furnace magnetic separation’ and iron nugget by rotary hearth furnace

Development of Technologies for High Phosphorus Oolitic

High phosphorus oolitic hematite deposit is a kind of refractory iron ore resource of huge amount. At present, it is difficult to be utilised by traditional physical and chemical technology

Reduction Process of High Phosphorus Oolitic Hematite

The changing characteristics of iron mineral along with the reduction time in reduction of a high phosphorus oolitic hematite by carbon were discussed in the paper. The grain growth of metallic iron was investigated in detail. The results showed that the iron mineral in reduction of the oolitic hematite changed as Fe2O3→Fe3O4→FeO→Fe, and finally was reduced to metallic iron.

Preparation of Iron Carbide from High Phosphorus Oolitic

In order to find a new way to utilize the high phosphorus oolitic hematite ore as raw material for steelmaking, the reduction and carburization of high phosphorus oolitic hematite by the gas of CH4-H2 were studied. High phosphorus oolitic hematite, reduction and carburization products were investigated by the means of XRD and scanning electron microscope.

The stability, characteristics and magnetic properties of

of the high phosphorus oolitic hematite is shown in Table 1. Experimental methods Two-step process for the preparation of iron carbide. The preparation of Fe 3C from high phosphorus oolitic hematite at 105 Pa was carried out using a two-step process, which was H 2 reduction and subsequent carburization with CH 4. Firstly, the

Study on Phosphorus Removal of High-Phosphorus Oolitic

The results showed that high-phosphorus oolitic hematite could be exploited on industrial scale, with the new process direct reduction roasting grinding magnetic separation, and that the

Application of Wood Char in Processing Oolitic High

Phosphorus removal from oolitic high-phosphorus hematite using direct reduction followed by melting separation was investigated. At the direct reduction stage, highly volatile wood char was prepared by carbonizing jujube wood at 673 K for 2 h and was used as reducing agent. The results of the direct reduction tests show that at a temperature of 1 373 K, a char mixing ratio of 0. 8, and a

Mechanism of phosphorus removal in beneficiation of high

High phosphorus oolitic hematite deposit is a kind of refractory iron ore resource of huge amount. At present, it is difficult to be utilised by traditional physical and chemical technology

Innovative Method for Separating Phosphorus and Iron from

Jun 22, 2014 Meanwhile, the experiments of high-phosphorus hematite used in rotary hearth furnace iron nugget processes are studied as well. The results indicate that the iron nugget process is a feasible and efficient method for iron and phosphorus separation of high-phosphorus oolitic hematite. The phosphorus content in iron nuggets is relatively low.

Distribution Characteristics of Phosphorus in the Metallic

The distribution characteristics of phosphorus in the metallic iron, and the reduction behaviors of hematite and fluorapatite during solid-state reductive roasting of a phosphorus-rich (1.3 mass%) oolitic hematite ore were investigated in the temperature range of 900°C–1200°C.

The Behavior of Phosphorus During Reduction and

Jun 13, 2016 High-phosphorus oolitic hematite has not been widely utilized due to high content of phosphorus. Ca3(PO4)2 is the main component containing phosphorus in high-phosphorus oolitic hematite. In the present work, the thermodynamics was studied for Ca3(PO4)2 reduction by H2 gas and then carburization by CH4 gas. The results show that phosphorous in Ca3(PO4)2 cannot be reduced

Slag/Metal Separation from H2-Reduced High Phosphorus

Oolitic hematite ore, characterized by complex mineral phases, unique concentric oolitic texture and high phos-phorus content, is considered to be one of the most refrac-tory iron ore resources. It is widely distributed in France, Canada, Saudi Arabia and China.1) There are approximately 22 billion tons of high-phosphorus iron ores with an average

Oolitic Hematite Separating Process Xinhai

Oolitic hematite has thin mosaic granularity hematite and it is mutual packages with siderite, chamosite and phosphorus-containing mineral which makes oolitic hematite iron grade and phosphorus content difficult to achieve the requirements of smelting, and become one of the most refractory hematite iron ore processing and machine recognized at