Study on the Performance of Corundum Castables Binded by High Titanium Blast Furnace after Extracting Titanium

The slow cooling tailings produced in the process of silicon-titanium alloy extraction from high titanium blast slags by plasma fusion technique were used as castables binders,and the effects of the slow cooling tailings addition(wb:0percent,2 percent,4 percent,6 percent and 8 percent) on the properties of corundum castables were investigated with brown fused alumina particles(5~3 mm,3~1 mm,1~0mm),fine powder of white fused alumina(≤ 0.088 mm),ultra-fine α-alumina,and micro silica as starting materaials. The results show that:①the water requirements of castables get more,the cold and hot modulus of flexural and compressive strength of castables treated at 110℃ and 1 600℃ respectively gradually increase,however,those of castables treated at 1 100℃ decrease when addition of slow cooling tailings increasing; ②excess addition of slow cooling tailings are harmful for the thermal shock resistances and high temperature flexural strengths; ③ regarding the slag corrosion resistance,the erosion index of sample with 6% slow cooling tailings is highest,and the erosion index of sample with 4% slow cooling tailings is close to the Secar71 cement castables sample; ④the suitable addition of the slow cooling tailings for the corundum castables is about 4 percent,and not more than 6 percent.