摘要:
利用等离子熔融技术提取硅钛合金后的缓冷尾渣为结合剂,以电熔棕刚玉颗粒、电熔白刚玉细粉(≤ 0.088mm)、α-Al2O3微粉、SiO2微粉为主要原料,研究缓冷尾渣加入量(0、2%、4%、6%、8%)对刚玉基浇注料性能的影响。试验表明:①随着缓冷尾渣加入量的增加,浇注料的需水量增大,常温和高温烧后强度逐步增强,中温强度则逐步降低;②加入量过多不利于其热震性能和高温抗折强度的发展;③在抗渣侵蚀性能方面,加入6%缓冷尾渣试样的侵蚀指数最大,加入量4%缓冷尾渣与以4%Secar71水泥结合的浇注料,抗侵蚀性能接近;④在刚玉浇注料中缓冷尾渣的加入量4%左右为宜,不宜超过6%。
Abstract:
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.
下载:
