| 【文章摘要】 Al_2O_3-SiC-C castables with pelletized graphite addition of 0,2%,4% or 6%( by mass,the same hereinafter) were prepared using brown fused corundum( 8- 5,5- 3 and 3- 1 mm),dense fused corundum( ≤1 and 0. 045 mm) and Si C( ≤1 and ≤0. 064mm) as main starting materials with mass ratio of aggregate∶ matrix = 71∶ 29,2% silicon powder and 0. 4%B4C as antioxidants,and pelletized graphite as carbon source. Effect of pelletized graphite addition on physical properties,oxidation resistance,slag resistance and thermal shock resistance of Al_2O_3-SiC-C castables was researched. The results show that: with the increase of pelletized graphite addition,the required water amount of castables increases,the bulk density and strength reduce;with 4% pelletized graphite,the castable performs the best oxidation resistance; the increase of graphite is beneficial to the improvement of slag penetration resistance and corrosion resistance; with 6% pelletized graphite,the thermal shock resistance is the best. |