Effects of phosphate additives on the wetting and corrosion resistance of high-chrome refractory materials to two slags
Effects of phosphate additives on the wetting and corrosion resistance of high-chrome refractory materials to two slags
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磷酸盐添加剂对高铬耐火材料对两种炉渣润湿及耐腐蚀性的影响
DOI：
10.1016/j.ceramint.2022.10.339
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发表时间：
2022-10
影响因子：
5.2
通讯作者：
Guangsuo Yu
中科院分区：
文献类型：
--
作者：
Kuiyu Liu;Qinghua Guo;Abdul Raheem;Yan Gong;Jinye Mo;Hongxia Li;Guangsuo Yu
采用静滴法结合热力学模拟计算，研究了高硅渣和高钙渣在两种高铬耐火材料（含和不含磷酸盐添加剂）上的润湿、铺展和渗透行为。记录了渣样在两种高铬耐火材料上的润湿过程，并利用图像处理技术测量了渣样在两种高铬耐火材料上的表观接触角。利用扫描电镜（SEM）和能谱仪（EDS）分析了腐蚀后试样的微观组织和化学成分。结果表明，磷酸盐的加入提高了两种渣系的抗润湿性和高硅渣系的抗渗透性。但高钙渣对含磷酸盐添加剂的高铬耐火材料的渗透和侵蚀作用较强，这是由于高钙渣中的CaO能与含磷酸盐添加剂的高铬耐火材料中的P2O5和Cr2O3发生反应，生成大量液相，造成更大的破坏。
This study investigated the wetting, spreading, and infiltration behavior of the two slags (high-silicon slag and the high-calcium slag) on the two high-chrome refractories (with and without phosphate additives) in-situ using sessile drop tests combing thermodynamic simulation calculations. The wetting process of the slag samples on the two high-chrome refractories was recorded, and the apparent contact angle was measured by image processing technology. The microstructures and chemical compositions of the corroded samples were analyzed by scanning electron microscopy (SEM and EDS). The results showed that the addition of phosphate improved wetting resistance to the two slags and infiltration resistance to the high-silicon slag. However, the high-calcium slag showed the strong penetration and corrosion on the high-chrome refractory with phosphate additives, which was ascribed to the CaO, that could react with P2O5and Cr2O3in the high-chrome refractory with phosphate additives, producing a large amount of liquid phase, causing more damage.
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