Effect of SiO<sub>2</sub> on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting

Sun Xin; Wang Xinwei; Cao Junze; Zhou Weiji; Yao Yudong; Dong Yanwu; Jiang Zhouhua

doi:10.20057/j.1003-8620.2025-00110

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Effect of SiO₂ on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting

Smelting and Solidification | 更新时间：2026-01-16

- Effect of SiO₂ on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting
- Special Steel Vol. 47, Issue 1, Pages: 69-77(2026)
- 作者机构：
  
  1.东北特殊钢集团股份有限公司，大连 116014
  2.东北大学冶金学院，沈阳 110819
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2025-00110
  CLC： TF744
- Received：16 April 2025，
  
  Published：30 January 2026
- 稿件说明：
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孙欣,王鑫伟,曹俊泽等.SiO₂对抽锭式电渣渣系析出相和高温结构的影响[J].特殊钢,2026,47(01):69-77.

Sun Xin,Wang Xinwei,Cao Junze,et al.Effect of SiO₂ on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting[J].Special Steel,2026,47(01):69-77.
孙欣,王鑫伟,曹俊泽等.SiO₂对抽锭式电渣渣系析出相和高温结构的影响[J].特殊钢,2026,47(01):69-77. DOI： 10.20057/j.1003-8620.2025-00110.

Sun Xin,Wang Xinwei,Cao Junze,et al.Effect of SiO₂ on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting[J].Special Steel,2026,47(01):69-77. DOI： 10.20057/j.1003-8620.2025-00110.

摘要

抽锭式电渣重熔工艺具备生产效率高与铸锭成材率高的显著优势。然而在抽锭过程中因结晶器和铸锭之间存在相对移动，由此会产生较强的剪切力。因此，常出现由于渣皮强度不足而引发的漏钢以及漏渣事故。试验以常规电渣重熔所采用的渣系作为基础，加入不同含量的SiO

，测定熔渣的黏度和熔点，分析了不同含量的SiO

对熔渣析出相和高温结构的影响，并对1%

［SiO

］的熔渣在不同剪切力作用下的析出相和高温结构进行测定。研究结果表明：熔渣熔点与

［SiO

］成正比关系，黏度及其转折温度与之成反比关系。

［SiO

］增加时，熔渣的黏流活化能从26.4 kJ/mol增加到148.56 kJ/mol并在3%

［SiO

］时达到最大值153.8 kJ/mol；高温析晶相以CaF

和Mg

AlO

为主，在

［SiO

］为5%时开始析出含硅物相，熔渣网状结构稳定性的提高得益于［Si-O］四面体结构，［Si-O］结构逐渐由Q

和Q

转变为Q

、Q

；向熔渣施加一定的剪切力会促进含硅物相的析出，但随着剪切力的增大含硅相消失，析晶相种类保持不变；同时剪切力的增加对熔渣中［Si-O］结构向Q

转变提供正面作用，Q

、Q

转变为结构更复杂的Q

、Q

，使得熔渣聚合度保持稳定，具备稳定的冶金特性。

Abstract

The consumable electrode electroslag remelting using the withdrawal ingot method has the advantages of high production efficiency and high yield rate of ingot. However， due to the relative movement between the mold and the ingot， relatively strong shearing forces are generated， resulting in steel leakage and slag leakage accidents frequently occurring during the ingot withdrawal process because of the insufficient strength of the slag crust. In this study， based on the conventional slag system for electroslag remelting， different contents of SiO

were added to the slag to determine the viscosity and melting point of the slag. The effects of different contents of SiO

on the precipitated phase and high temperature structure of the slag were analyzed. The precipitated phase and high temperature structure of 1%

［SiO

］ slag under different shear forces were measured. The results show that with the increase of

［SiO

］ the melting point of the slag increases， while the viscosity and its transition temperature decrease， and the viscoelastic activation energy of the slag increases from 26.4 kJ/mol to 148.56 kJ/mol and reaches a maximum of 153.8 kJ/mol at 3%

［SiO

］. The high temperature crystallization phases are mainly CaF

and Mg

AlO

， and the silicon-containing phase begins to precipitate when the

［SiO

］ is 5 %. The ［Si-O］ tetrahedral structure

improves the stability of the network structure of the slag， and the ［Si-O］ structure gradually changes from Q

and Q

to Q

， Q

and Q

. Applying a certain shear force to the slag will promote the precipitation of silicon-containing phases， but with the increase of shear force， the silicon-containing phases disappear and the types of crystallization phases remain unchanged. At the same time， the increase of shear force provides a positive effect on the transformation of

［Si-O］ structure to Q

in the slag. Q

and Q

are transformed into Q

and Q

with more complex structure， which makes the polymerization degree of the slag stable and has stable metallurgical characteristics.

关键词

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references

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⁰

Effect of SiO2 on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting

DOI：10.20057/j.1003-8620.2025-00110

摘要

Abstract

关键词

Keywords

references

Effect of SiO₂ on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting