Protection Mechanism of CMA-Additive In MgO-C Ladle Bricks
This article investigates the effect of addition of Calcium Magnesium Aluminate(CMA)to Magnesia-Carbon(MgO-C)bricks.CMA consists of grains in which microcrystalline MA-spinel phases are embedded in a matrix of calcium aluminates.Applied as binder in steel ladle castables it has proven already its positive effect on wear resistance in many steel plants due to the associated change in microstructure.The effect of CMA addition to MgO-C bricks in comparison to the addition of pure spinel has been investigated in the first part of this study.The CMA-doped MgO-C brick showed the lowest attack by slag.Following this positive result several trials in different steel plants have been conducted and results from post-mortem analyses are discussed in the second part of this paper.All ladle trials had in common that during operations a slag coating was formed on the surface of the CMA-containing bricks that reduced the wear rate of the bricks and gave a better protection of the carbon in the brick against oxidation.A lower wear rate was achieved,even when reducing the amount of anti-oxidants in the bricks.
Christoph W(O)HRMEYER Simon GAO Scot GRADDICK Chris PARR Fabien SIMONIN Goutam BHATTACHARYA Makoto IIYAMA Patrick GEHRE Christos ANEZIRIS
Imerys Aluminates,Putaux,Paris-La Defense,France Sen.Tech.Advisor Refractories,Imerys High Resistance Minerals Japan,Tokyo,Japan Technische Universit(a)t Bergakademie Freiberg,Institute of Ceramic,Glass & Construction Materials,F
国际会议
Conference on Refractories International 2018, CRI2018)(2018国际耐火材料学术会议)
杭州
英文
1-8
2018-10-17（万方平台首次上网日期，不代表论文的发表时间）