Effect of H2 on the Distribution of Phosphorus in the Gaseous Reduction of Hematite Ore

Article Metallurgy & Metallurgical Engineering

Gasification Behavior of Phosphorus during Hydrogen-rich Sintering of High-phosphorus Iron Ore

Yanbiao Chen et al.

Summary: This study proposes a new method of phosphorus gasification removal in a hydrogen-rich sintering process, and analyzes its efficiency and mechanism through experimental and thermodynamic calculations. The experimental results show that the dephosphorization rate first increases and then decreases with temperature in a hydrogen-rich atmosphere, reaching the maximum value at 1,100 degrees C. Compared to carbon reduction, the dephosphorization rate significantly improves in a hydrogen-rich atmosphere. Thermodynamic analysis indicates that adding SiO2 and Na2CO3 can reduce the reduction temperature of apatite.

ISIJ INTERNATIONAL (2022)

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Article Engineering, Chemical

Reduction kinetics of combusted iron powder using hydrogen

C. J. M. Hessels et al.

Summary: Hydrogen reduction of iron oxide fines produced by iron combustion was investigated using thermogravimetric analysis (TGA). The results showed that the morphology of the reduction products depended on temperature but not on the hydrogen partial pressure, with higher temperatures leading to larger pore sizes. Based on analysis, the reduction process could be described by a single-step phase boundary controlled reaction at temperatures below 600℃, and a multi-step mechanism was required for reactions at higher temperatures.

POWDER TECHNOLOGY (2022)

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Article Geochemistry & Geophysics

A New Route to Upgrading the High-Phosphorus Oolitic Hematite Ore by Sodium Magnetization Roasting-Magnetic Separation-Acid and Alkaline Leaching Process

Jian Pan et al.

Summary: This paper proposes an innovative method for upgrading iron and removing phosphorus from high-phosphorus oolitic hematite ore using the sodium magnetization roasting-magnetic separation-sulfuric acid and sodium hydroxide leaching process. The process parameters were optimized and the results show that the method effectively removes phosphorus and upgrades iron, resulting in a high-quality iron product.

MINERALS (2022)

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Article Metallurgy & Metallurgical Engineering