PDF

Influence of Al 2O3/SiO2 Ratio on the Viscosity and Structure of Aluminate Ironmaking Slag Systems in the HIsmelt Process

SHUO ZHANG, WEI ZHENG

2025enaluminaviscosityslagironmakingprocess

Abstract

Language:

The HIsmelt process, as a potential technology for smelting high-alumina iron ores, encounters practical challenges such as high slag viscosity and free running temperature. This paper investigated the flowability and structure of CaO–SiO2–MgO–Al2O3–FeO slag with varying Al2O3/SiO2 ratios. The research revealed that the viscosity initially decreased and then increased with increasing Al2O3/SiO2 ratio from 0.53 to 1.45, troughing at ratios near 0.88, while the free running temperature exhibited the opposite trend. Elevating the Al2O3 level to 26–29 wt pct enhanced the slag’s flowability compared to the baseline slag with 17 wt pct Al2O3, thereby meeting the smelting requirements of high-alumina iron ores. Molecular dynamics simulations confirmed that Si4+ and Al3+ in the slag were predominantly tetrahedrally coordinated. Bond strength weakening triggered by an increased Al–O bond number dominated the viscosity decrease. Conversely, the increase in polymerization resulting from the higher tetrahedral number and bridging oxygen concentration accounted for the subsequent viscosity increase.

Download

Cite This Work

@article{54ce66c2-9b84-4240-bb6e-d8e2a97f4341,
  title={Influence of Al 2O3/SiO2 Ratio on the Viscosity and Structure of Aluminate Ironmaking Slag Systems in the HIsmelt Process},
  author={SHUO ZHANG and WEI ZHENG},
  year={2025},
  language={en}
}
TY  - JOUR
TI  - Influence of Al 2O3/SiO2 Ratio on the Viscosity and Structure of Aluminate Ironmaking Slag Systems in the HIsmelt Process
AU  - SHUO ZHANG
AU  - WEI ZHENG
PY  - 2025
LA  - en
ER  -

Similar Items

BLAST FURNACE IRONMAKING: Analysis, Control, and Optimization

Ian Cameron, Mitren Sukhram

This book delves into the intricate processes involved in blast furnace ironmaking, emphasizing the analysis, control, and optimization of operations.

2020enPDF

Metal Casting Processes

Unknown, Unknown

This chapter discusses metal casting processes, highlighting the diversity and common characteristics among them. The objective is to elucidate the fu

2023enPDF

Artificial intelligence-aided materials design: AI-algorithms and case studies on alloys and metallurgical processes

Rajesh Jha, Bimal Kumar Jha

This book describes the application of artificial intelligence (AI) and machine learning (ML) concepts to develop predictive models that can be used t

2022enPDF

Process Engineering and Plant Design

Siddhartha Mukherjee

This book provides a comprehensive overview of the critical aspects of industrial process engineering and plant design, addressing the complexities an

2022enPDF

The Nature of Solid Iron and Its Grain Structure

Unknown, Unknown

This study focuses on the fundamental characteristics of solid iron, which is predominantly composed of iron atoms and provides a basis for understand

2023enPDF

842063941 SX configuration

2026enPDF