Research on mechanism change of temperature effect on dephosphorization in the bottom-blown O2–CaO process of semi-steelmaking

Wang, Chunyang; Zhu, Rong; Dong, Kai; Wei, Guangsheng; Xue-ping, Ren; Zhou, Yun; Xue, Zhengliang; Feng, Chao

doi:10.1016/j.jmrt.2023.05.113

Cited by 6 publications

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

High‐Efficiency Dephosphorization by Bottom‐Blown O₂‐CaO Process for Semi‐Steelmaking

Wang,

Dong,

Xue

et al. 2023

steel research int.

Self Cite

View full text Add to dashboard Cite

In steelmaking, the bottom‐blown O2‐CaO process is used to achieve efficient dephosphorization. However, few studies have applied it to dephosphorization converters. Therefore, this study considers the thermodynamic and kinetic mechanisms of dephosphorization during the process. The selective oxidation transfer temperatures of C and P are calculated. Compared to the combined blowing process, the bottom‐blown O2‐CaO process reduces the optimum dephosphorization temperature from 1593 to 1573 K. Moreover, the FeO content decreases by 20.7% owing to the increased stirring energy and improved kinetic conditions; the binary basicity (R) of the slag increases, and the lime consumption decreases by 2.9 kg t−1. The higher slagging efficiency indicates that the CaO powder melts and dephosphorization is completed during the fire‐spot zone floating process. Furthermore, the optimum FeO content for dephosphorization decreases as R increases. The selective oxidation of C and P can be divided into two stages. The oxidation stage of P preferred C is extended in this process. Overall, the end‐point P content accounts for 22.52% and 46.85% of the samples prepared using the combined blowing and bottom‐blown O2‐CaO processes when the P content is 0.02–0.03%, respectively.

show abstract

High‐Efficiency Dephosphorization by Bottom‐Blown O₂‐CaO Process for Semi‐Steelmaking

Wang,

Dong,

Xue

et al. 2023

steel research int.

Self Cite

View full text Add to dashboard Cite

show abstract

A Multimode Smelting Strategy for Converter Smelting Based on Novel Molten Iron Classification Methods

Gao,

Bao,

Wang

et al. 2024

steel research int.

View full text Add to dashboard Cite

Owing to the complexity of converter reactions and the inevitable fluctuations of raw materials, developing a universal smelting strategy suitable for all converter conditions is challenging. Therefore, this study introduces a multimode smelting strategy based on a novel classification method to categorize molten iron. In this method, the molten iron is classified into four regions based on the comprehensive effects of Si and P contents. Specific smelting strategies are recommended for the molten iron in each region. These strategies include adjustments to slag basicity, charging schemes, and the blowing mode of the lance. These multimode smelting strategies are implemented in actual production. The results indicate satisfactory optimization of production processes, including stable production, cost reduction, and increased efficiency. Consequently, the dephosphorization rate increases by 1.22%, the lime consumption per ton of steel decreases by 2.41 kg t−1, and the average basicity of steel slag decreases by 0.21. This strategy provides preliminary guidance before the initiation of the smelting process to improve efficiency, reduce consumption, and standardize the operations.

show abstract

Technology Development and Process Optimization of Bottom-Blowing O2–CO2–CaO in Dephosphorization Converter

Ren,

Dong,

Zhu

et al. 2024

The Minerals, Metals &Amp; Materials Series

View full text Add to dashboard Cite

Research on mechanism change of temperature effect on dephosphorization in the bottom-blown O2–CaO process of semi-steelmaking

Cited by 6 publications

References 26 publications

High‐Efficiency Dephosphorization by Bottom‐Blown O₂‐CaO Process for Semi‐Steelmaking

High‐Efficiency Dephosphorization by Bottom‐Blown O₂‐CaO Process for Semi‐Steelmaking

A Multimode Smelting Strategy for Converter Smelting Based on Novel Molten Iron Classification Methods

Technology Development and Process Optimization of Bottom-Blowing O2–CO2–CaO in Dephosphorization Converter

Contact Info

Product

Resources

About

Research on mechanism change of temperature effect on dephosphorization in the bottom-blown O2–CaO process of semi-steelmaking

Cited by 6 publications

References 26 publications

High‐Efficiency Dephosphorization by Bottom‐Blown O2‐CaO Process for Semi‐Steelmaking

High‐Efficiency Dephosphorization by Bottom‐Blown O2‐CaO Process for Semi‐Steelmaking

A Multimode Smelting Strategy for Converter Smelting Based on Novel Molten Iron Classification Methods

Technology Development and Process Optimization of Bottom-Blowing O2–CO2–CaO in Dephosphorization Converter

Contact Info

Product

Resources

About

High‐Efficiency Dephosphorization by Bottom‐Blown O₂‐CaO Process for Semi‐Steelmaking

High‐Efficiency Dephosphorization by Bottom‐Blown O₂‐CaO Process for Semi‐Steelmaking