关键词: 引流砂, 滑动水口, MgO-C耐火材料, 润湿, 侵蚀

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