Abstract: Taking the chromium drainage sand for continuous casting of a steel plant as the research object， the classical drop method is adopted to study the influence of the commonly used chromium drainage sand on the wetting and erosion behavior of the sliding water inlet material （mainly MgO-C material）， and to explore the wetting and erosion mechanism of chromium drainage sand on sliding nozzle materials.The results show that the erosion degree of chromium drainage sand on MgO-C refractory is more serious， Cr and Si elements in chromium drainage sand can enter the MgO-C refractory through dissolution and diffusion， and cause damage to the refractory matrix.For the chromium drainage sand （w［C］ is about 6%） used in this experiment， MgO-C refractory with 12% carbon content and the contact angle 71.9°with drainage sand is more prone to wetting and erosion by drainage sand than MgO-C refractory with 8% carbon content and the contact angle 93.9°with drainage sand. Therefore， sliding nozzle materials with low carbon content should be selected as far as possible when using this chromium drainage sand for continuous casting production，which is more conducive to the smooth casting.

Key words: Drainage Sand, Slide Gate, MgO-C Refractory, Wetting, Corrosion

摘要： 以某钢厂连铸用铬质引流砂为研究对象，采取经典的滴落法研究常用铬质引流砂对滑动水口材料（以MgO-C材料为主）的润湿、侵蚀行为的影响，探究铬质引流砂对滑动水口材料润湿和侵蚀机制。研究结果表明，铬质引流砂对MgO-C耐火材料的侵蚀程度较为严重，铬质引流砂中Cr、Si元素可通过溶解、扩散的方式进入MgO-C耐火材料内部，并对耐材基体造成侵蚀。针对本实验使用的铬质引流砂（w［C］为6%左右）来说，w［C］=12%的MgO-C耐火材料与引流砂接触角为71.9°，比w［C］=8%的MgO-C耐火材料与引流砂接触角为93.9°更容易被引流砂润湿和侵蚀，因此，在使用此铬质引流砂进行连铸生产时，尽可能选择使用C含量低的滑动水口更利于浇注顺行。

关键词: 引流砂, 滑动水口, MgO-C耐火材料, 润湿, 侵蚀