滑板再生料在钢包控流系统复合下水口中的回收应用  

Recycling Application of Recycled Slide Plate Materials in Composite Bottom Nozzle of Ladle Flow Control System

作　　者：鲁志燕 朱发金 唐兵 李凤仙[2] LU Zhiyan;ZHU Fajin;TANG Bing;LI Fengxian(Yunnan Punaikun Steel High Temperature Material Co.,Ltd.,Kunming 650302,China;Kunming College of Materials Science and Engineering,University of Science and Technology,Kunming 650093,China)

机构地区：[1]云南濮耐昆钢高温材料有限公司,云南昆明650302 [2]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《材料科学与工程学报》2025年第1期97-104,共8页Journal of Materials Science and Engineering

基　　金：云南省科技厅项目(202401AT070362)。

摘　　要：采用双面加压免烧滑板再生料成型制备高性能复合结构的下水口,具有较好的研究意义和经济效益。本研究采用X射线衍射仪(XRD)、扫描电镜(SEM)和能谱仪(EDS)等表征技术对用后免烧滑板和滑板再生料的显微组织结构进行分析,分析了不同滑板再生料比例替代85铝矾土熟料对水口性能的影响,并使用多次的铸钢工业试验对优化的成分配比进行验证。研究结果表明:滑板铸孔和滑道部位的主要组成为板状刚玉,基质中有SiC、B_(4)C和Al_(4)C_(3)存在,而滑板复合层的主要组成为铝矾土熟料。用后复合滑板经过破碎、水化处理后,得到滑板再生料,滑板再生料以刚玉相和莫来石相为主。随着滑板再生料替代85铝矾土熟料的比例增加,试样的体积密度呈下降趋势,显气孔率呈上升趋势。试样经1550℃埋碳处理后,试样中的Al与C反应形成Al_(4)C_(3)陶瓷增强相,Al_(2)O_(3)与SiO_(2)部分形成莫来石A_(3)S_(2),液相烧结提高了试样的耐压强度和抗折强度。通过加料筒和浮动工作台双面加压成型,复合下水口上下部密度梯度明显改善。当滑板再生料替代85铝矾土熟料的比例为77%时,复合下水口B/A4的使用效果与均质下水口B相当,即使用3次后未出现分层和裂纹现象,提高了复合下水口的稳定性。本研究可为滑板再生料在复合下水口中的应用提供较好的理论依据。A high-performance composite bottom nozzle was fabricated by using double-sided pressurized processing from recycled slide plate materials,exhibiting significant research values and economic benefits.The microstructure of the regenerated materials was studied using X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS).The effects of the regenerated material content,which was used to replace 85 bauxite clinker,on nozzle performance were analyzed.The optimized content value was verified by industrial tests involving casting steel.The results show that the materials near the cast holes and at slide plane are predominantly composed of plate-like corundum.SiC,B_(4)C and Al_(4)C_(3)are present within the matrix,while the composite layer is mainly composed of bauxite clinker.After the postcomposite slide plate is broken and hydrated,the recycled slide plate material is obtained.The primary components of the regenerated material are corundum and mullite.With the increasing content of the regenerated material replacing 85 bauxite clinker,the bulk density decreases,while the apparent porosity increases.After buried carbon treatment at 1550℃,Al reacts with C to form the Al_(4)C_(3)ceramic reinforcing phase,while Al_(2)O_(3)reacts with SiO_(2)to form mullite,A_(3)S_(2).The compressive strength and flexural strength of the sample are enhanced through liquid phase sintering.The density gradient of the upper and lower parts of the composite bottom nozzle is obviously improved by the double-sided compression molding of the feeding cylinder and the floating worktable.When the content of the regenerated slide material replaced 85 bauxite clinker is 77%,the performance of the composite nozzle B/A4 is comparable to that of the homogeneous nozzle B,i.e.,no delamination or cracks occurs after 3 times of use,indicating an improvement in the stability of the combined bottom nozzle.This study can provide a good theoretical basis for the application of slide plate regenerated material in composi

关 键 词：滑板 再生料 复合结构 下水口 性能 

分 类 号：TB34[一般工业技术—材料科学与工程]