Influence of Fused CaZrO3 Addition on Properties of Chrome-free Castables for RH Degassers

摘要

This thesis considered specific operating conditions of RH degassers, using corundum and spinel as the main raw material, adding proper micropowder and the efficient compound water reducing agent, discussed the influence of fused CaZr03 addition on RH degassers used chrome-free castable's properties, which includes the castable's strength, permanent line rate, wear resistance and performance of the slag resistance. The results showed: (1) Adding proper fused CaZr03 can improve the strength of castable and wear resistance;(2) With the increase of the content of CaZr03, volume density of castable declined slightly, apparent porosity increases, the line rate increased obviously;(3) With the increase of the amount of CaZr03, slag erosion resistance of castable declined;(4) From the perspective of the comprehensive performance of castable, fused CaZr03 suitable addition amount of 2 ~ 4%.