溶胶结合快干浇注料的研制及其工业应用  

Development and Industrial Application of Sol Combined Quick-Drying Castable

作　　者：王世清[1] 

机构地区：[1]中冶武汉冶金建筑研究院有限公司,湖北武汉430081

出　　处：《工业炉》2012年第4期44-46,53,共4页Industrial Furnace

摘　　要：研制了以致密刚玉和莫来石为骨料、白刚玉粉和矾土粉及α-Al2O3(≤0.043 mm)微粉为细粉、采用硅溶胶作结合剂的浇注料,该浇注料制成的试样分别于815℃×3 h、1 100℃×3 h和1 400℃×3 h进行加热后,检测相应试样常温抗折强度、耐压强度、体积密度、线变化率和抗热震性能。结果表明:硅溶胶结合浇注料经1 100℃×3 h处理后的抗折强度和耐压强度分别达到12.6 MPa和128.2 MPa;经1 100℃水冷热震性能测试达到100次以上,试样基本没有出现裂纹,经测试其耐压强度损失率仅为18.7%;与传统采用铝酸钙水泥作结合剂的耐火浇注料相比,该浇注料具有良好的体积稳定性、较好的中高温强度以及较快的凝胶性和烘烤性。T he Silica sol bonded castable is developed from the dense corundum and mullite as aggregate, the white corundum powder, the alumina powder and the α-A1203 （≤0.043 mm） micro powder as fine powder. The castable specimens are respectively heated at 815 ℃, 1 100℃ and 1 400℃ with a soaking time of 3h. The cold crushing strength（C.C.S）, the cold modulus of rupture （C.M.O.R）,the bulk density （B.D）, the linear change（L.C）, and the thermal shock resistance of corresponding specimens are measured. The results show that the C.C.S and C.M.O.R of the Silica-sol bonded castable heated at 1 100℃ with a soaking time of 3 h reached 12.6 MPa and 128.2 MPa respectively, and after suffering 100 times water- cooled thermal shock cycles, there nearly no crack is observed on the specimen, and the residual C.C.S is above 81.3%. To comparison with the traditional use of Calcium Aluminate cement as binder of refractory castable, this eastable has good volume stability, good medium-high temperature strength and rapid gelling and baking quality.

关 键 词：硅溶胶 浇注料 热震稳定性 快速凝胶性和烘烤性 良好的施工性 

分 类 号：TF065[冶金工程—冶金物理化学]