Formation and Transformation of Spinel inclusion in Aluminium Killed Steel

李海波; 林伟; 王新华; 陈天明; 杨素波

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Formation and Transformation of Spinel inclusion in Aluminium Killed Steel

更新时间：2026-01-21

- Formation and Transformation of Spinel inclusion in Aluminium Killed Steel
- Special Steel Vol. 28, Issue 4, Pages: 30-32(2007)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 攀枝花钢铁(集团)公司,攣枝花,617067
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：05 March 2007，
  
  Online First：05 January 2023，
  
  Published：05 January 2007
- 稿件说明：
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李海波, 林伟, 王新华, et al. Formation and Transformation of Spinel inclusion in Aluminium Killed Steel[J]. Special Steel, 2007, 28(4): 30-32.
DOI：

李海波, 林伟, 王新华, et al. Formation and Transformation of Spinel inclusion in Aluminium Killed Steel[J]. Special Steel, 2007, 28(4): 30-32. DOI：

摘要

研究了140 t LD-LF-RH-CC流程冶炼超低氧钢时精炼过程铝脱氧钢中夹杂物的变化。试验钢出钢过程加足够的铝脱氧

以尽快降低钢液中溶解氧。为使Al

转变为钙铝酸盐夹杂

选用CaO-Al

精炼渣系

渣中含3.00%～8.42%SiO

。结果表明

精炼时钢液中夹杂物的变化趋势为:纯Al

→尖晶石夹杂→CaO-Al

-MgO复合夹杂物

炉渣中8.42%SiO

炉次夹杂物转变慢于3.00%SiO

炉次;当炉渣CaO/Al

为1.60时

钢中夹杂物大多转变为低熔点CaO-Al

-MgO复合夹杂。精炼渣的成分控制应为(%):55～60CaO

35～40Al

5～10MgO。

Abstract

The formation and transformation of inclusion in aluminium killed steel during refining have been studied with extra low oxygen steel steelmaking by 140 t LD - LF - RH - CC flow sheet. A sufficient of aluminium was added in test steel during tapping in order to as soon as decrease solution oxygen in liquid steel

and CaO-Al

refining slag series containing 3.00% ~ 8.42% SiO

were selected for Al

transforming to calcium aluminate inclusion. Test results showed that the transformation trend of inclusion in liquid steel during secondary refining was pure Al

3→

spinel→CaO - Al

-MgO complex inclusions

the tra

nsformation of inclusion in heat with slag containing 8. 42% SiO

was slower than that in heat with slag containing 3. 00% SiO

and as CaO/Al

of refining slag was 1. 60

most inclusions in steel transformed to low melting point CaO-Al

-MgO complex inclusions. The available ingredient of ladle refining slag is 55% - 60% CaO

35% -40% Al

5% ~10% MgO.

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