10B21冷镦钢LF精炼过程硼的终点控制分析与优化  

Analysisand optimization on final control of boron for 10B21 cold heading steel in ladle furnace refining process

作　　者：尹啸 李洋 丛培起 庞洪轩 郑冰 徐东[1,2,5] YIN Xiao;LI Yang;CONG Peiqi;PANG Hongxuan;ZHENG Bing;XU Dong(Whole Processes of High Quality Fastener Application Technology Research Center of Universities in Hebei Province,Hebei University of Engineering,Handan 056038,Hebei,China;Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province,Hebei University of Engineering,Handan 056038,Hebei,China;Chaoyang Iron&Steel Co.,Ltd.,of Ansteel Group Cor.,Ltd.,Chaoyang 122000,Liaoning,China;Engineering Research Center for High Toughness Wind Tower Steel of Hebei Province,Hebei University of Engineering,Handan 056305,Hebei,China;Meson Technology(Hebei)Co.,Ltd.,Handan 056000,Hebei,China)

机构地区：[1]河北工程大学,河北省高校高端紧固件全流程应用技术研发中心,河北邯郸056038 [2]河北工程大学,河北省高品质冷镦钢技术创新中心,河北邯郸056038 [3]鞍钢集团朝阳钢铁有限公司,辽宁朝阳122000 [4]河北普阳钢铁有限公司,河北省高韧性风塔钢工程研究中心,河北邯郸056305 [5]介子科技(河北)有限公司,河北邯郸056000

出　　处：《四川冶金》2025年第1期55-60,共6页Sichuan Metallurgy

基　　金：中央引导地方科技发展资金项目(246Z1009G);河北省高等学校科学技术研究项目资助(CXY2023004);河北省基础研究专项概念验证项目(E2024402143)。

摘　　要：LF精炼终点控硼是10B21钢十分关键的冶炼环节。本文从现场精炼渣角度出发,在较低硼元素收得率背景下,研究精炼渣的含硼特征,并结合热力学和动力学分析硼在LF精炼时的终点控制要素,旨在提高硼的收得率。结果表明,除主要常见矿物相外,LF精炼渣中存在少量未完全熔化溶解的硼铁合金。基于硼铁合金溶解热力学和动力学分析,钢液吸氧和精炼渣的氧化性高会间接影响硼的收得率,钢中溶解的硼会以氧化物形式间接损失掉,导致硼元素的收得率偏低。为了缩短硼铁合金在钢液的溶解时间,提高硼元素的扩散系数和减小合金的尺寸是有效途径。经过工业优化试验,硼元素的平均收得率可提高到93%,较优化前增加约10%,吨钢减少约0.02 kg硼铁合金,为企业降本增效。In the production process of 10B21 steel,controlling boron at the end of the ladle furnace(LF)refinement is critical.In this paper,the boron-bearing characteristics of LF slag was studied under the background of the lower yield of boron element.Moreover,thermodynamic and kinetic analysis were employed to control the endpoint of boron in LF to improve its yield.The results show that,in addition to the main common mineral phases,a small amount of undissolved FeB alloy does exist in LF refining slag.Based on the thermodynamic and kinetic analysis for the dissolution of FeB alloy,the oxygen absorption of liquid steel and high oxidation of LF refining slag will indirectly affect the yield of boron element,and the dissolved boron in steel will be indirectly wasted in the form of boron-bearing oxide,leading to the low boron yield.Additionally,to shorten the dissolution time of FeB alloy in liquid steel,it is an effective way to improve the diffusion coefficientβof boron element and reduce the size of FeB alloy.After the industrial optimization tests,the average yield of boron element in the steel can be increased to 93%,which is about 10%more than before the optimization,and also reduce using FeB alloy by about 0.02 kg per ton of steel,helping enterprises to achieve cost reduction and efficiency improvement.

关 键 词：10B21冷镦钢 LF精炼渣 硼铁合金 优化 收得率 

分 类 号：TF769.2[冶金工程—钢铁冶金]