Selective recovery of phosphorus from acid leach liquor of iron ore …

1. Introduction. There is huge amount of high phosphorus iron ore resources in many iron ore production areas, such as West Australia, Brazil, South Africa and Central South of China. 1–5 According to the statistical survey, the reserves of high phosphorus iron ore reach 7.45 billion tons in China, and among them more than 4 billion tons was deposited in Hubei …

A new iron recovery and dephosphorization approach from …

Around 54% of phosphorus (P), 21% of Al 2 O 3, and 61% of SiO 2 can be preliminarily removed from unroasted oolitic hematite ore. Through further dephosphorization with dilute sulfuric acid at room temperature, a high-quality Fe concentrate with 63.3% Fe, 0.04% P, and a Fe recovery rate of 96% was obtained.

Intensifying Gaseous Reduction of High Phosphorus Iron Ore …

Gaseous reduction kinetics of the high phosphorus iron ore fines from Hubei in China and effect of microwave pretreatment on the gaseous reduction behavior were studied. Gaseous reduction kinetics were investigated by TG (Thermogravimetric) methods using LINSEIS STA PT 1600 thermal analysis equipment. Microwave pretreat-ments to the ore fines with four …

Removal of Phosphorus From High Phosphorus Iron Ores …

Key words: high phosphorus; iron ore; dephosphorus; selective leaching; hydrochloric acid; dephosphorization ratio China is rich in high phosphorus iron ores re- sources. The reserves of high phosphorus iron ore accounts …

Review on High Phosphorous in Iron Ore: Problem and Way …

The high phosphorus iron ore is ground to a finer size fraction and beneficiated using the flotation process to remove unwanted phosphorus, alumina, silica, and alkalis (Na, K, etc.) and provide a super feed free from impurities for the blast furnace.

Phosphorus Removal and Iron Recovery from High …

To efficiently utilize high-phosphorus oolitic hematite resources, a method using direct reduction followed by melting separation was proposed. In this study, direct reduction …

Strengthening iron enrichment and …

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...

Migration behavior of iron and phosphorus during gas …

In this study, we presented simultaneous enrichment of iron (Fe) and phosphorus (P) to recover P from high-phosphorus iron ore and clarified the migration of P from the …

Green and efficient separation of iron and phosphorus from …

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

Smelting Potential of HIsmelt Technology for High-Phosphorus Iron Ore …

The iron recovery rate for high-phosphorus iron ore reached 92% with relatively high phosphorus content of pig iron about 0.28%under the reduction temperature of 1450 °C.

Gasification Behavior of Phosphorus during Hydrogen-rich …

With the development of China's iron and steel industry, the demand for iron ore is increasing, and the contradiction of iron ore shortage is prominent. 1, 2) China is rich in high-phosphorus …

Strengthening iron enrichment and dephosphorization of high-phosphorus

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 …

Migration behavior of iron and phosphorus during gas …

Especially in China, high-phosphorus oolitic hematite is widely distributed in the Hunan, Hubei, and Yangtze River basins, accounting for over 10 % of China's iron ore reserves (Sun et al., 2014, Keith, 2018), which presents a special concentric oolitic layered structure.

Studying on mineralogical characteristics of a refractory high

Effect of additives on iron recovery and …

In Western Hubei, China, phosphorus mainly exists in the form of apatite in high-phosphorus oolitic iron ore, and the iron minerals in raw ore contain phosphorus. Therefore, the dephosphorization of raw ore is more difficult. 10 20 30 40 50 60 70 80 90 2 / (°) Intensity / a.u. D C/E A/E A/B/D A/B/D A/B A A A A A B E B A Hematite(Fe2O3) B ...

Intensifying Gaseous Reduction of High Phosphorus Iron Ore …

The results indicated that when high-phosphorus iron ore concentrates containing 54.92 mass pct iron and 0.76 mass pct phosphorus were directly processed through acid leaching, iron ore ...

A new way to efficient utilization of eggshell waste: As green

Reduction roasting of high-phosphorus oolitic iron ore (HPOIO) requires the addition of expensive alkali metal compounds to enhance dephosphorization. In this paper, the eggshell waste from the catering industry was used to replace traditional dephosphorization agents, which not only avoided environmental problems caused by mining, but also ...

Iron recovery and dephosphorization behaviors from high …

Among them, high-phosphorus oolitic hematite (HPOH) is a competitive choice since it has a relatively high iron content (average 52%) and a large reserve of 3.72 × 10 9 t, …

A novel direct reduction-flash smelting separation

The iron ore with high phosphorus content is a common complex symbiotic iron ore species, and it is widely distributed in the United States, France, Russia, Australia and China [[1], [2], [3]]. Most of this type of ore presents an oolitic microstructure [1].

Dephosphorization of high phosphorus oolitic hematite …

The iron ore reserves of 3.72 billion tons, account for approximately 73.5% of the sedimentary iron ore in China (Lu et al., 1994). The high phosphorus oolitic hematite has the characteristics of low-grade iron content and high-level harmful impurities, such as phosphorus and aluminium (Wei, 2010), which limit the development of this oolitic ...

Reaction Characteristics and Existing Form of …

Despite the abundant reserves of iron ore resources in China, the overall iron ore is characterized by the behavior of low grade, fine grain size, and high impurities, resulting in the situation of importing large quantities of iron …

Direct Reduction of High-Phosphorus Oolitic Hematite: …

High-phosphorus (P) iron ore, particularly oolitic hematite, has remained unexploited due to technological and cost limitations in mining. Effectively developing this ore involves not just utilizing its iron content but crucially extracting P to reduce exploitation costs. Here, we applied a direct reduction-magnetic separation process to recover these valuable …

Iron ore

Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in colour from dark grey, bright yellow, deep purple, to rusty red. The iron itself is usually found in the form of magnetite (Fe 3 O 4), hematite (Fe 2 O 3), goethite, limonite or siderite.Hematite is also known as "natural ore".