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Development of High-Performance Mullite Steel-Pouring Brick.

Mingyang Huang1, Yuefeng Qi2, Xiaocheng Liang3,4

  • 1School of Energy Science and Engineering, Central South University, Changsha 410083, China.

Materials (Basel, Switzerland)
|May 13, 2026
PubMed
Summary
This summary is machine-generated.

Optimizing mullite steel-pouring bricks involves adjusting clay and zircon powder content. Decreasing clay improves strength and stability, while zircon enhances high-temperature performance, leading to smoother cast steel surfaces.

Keywords:
claysteel-pouring brickzircon powder contents

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Area of Science:

  • Materials Science
  • Ceramic Engineering
  • Refractory Materials

Background:

  • Steel pouring requires high-performance refractory bricks.
  • Mullite-based refractories are crucial for steel production.
  • Optimizing brick composition enhances performance and steel quality.

Purpose of the Study:

  • To investigate the impact of varying clay and zircon powder content on steel-pouring brick properties.
  • To determine the optimal formulation for enhanced brick performance.
  • To evaluate the synergistic effects of clay and zircon on refractory materials.

Main Methods:

  • Utilizing bauxite particles and sintered mullite powder as primary raw materials.
  • Systematically varying clay addition amounts and zircon powder contents.
  • Analyzing key properties including bulk density, cold/hot modulus of rupture, compressive strength, and high-temperature volume stability.

Main Results:

  • Reduced clay content slightly affected bulk density but improved cold modulus of rupture, compressive strength, hot modulus of rupture, and high-temperature volume stability.
  • Zircon powder addition did not significantly alter bulk density but substantially increased high-temperature flexural strength.
  • An optimal formulation of 5 wt.% clay and 1.5 wt.% zircon powder yielded superior performance and smooth cast steel surfaces.

Conclusions:

  • The synergy between clay and zircon powder is key to optimizing mullite steel-pouring brick performance.
  • The developed formulation offers improved comprehensive properties for steel-pouring applications.
  • This research provides a strategic approach for enhancing refractory materials in the steel industry.