作　　者： ; ; (刘百宽）; (史绪波）; (王成）;

机构地区： 西安建筑科技大学材料科学与工程学院

出　　处： 《耐火材料》 2009年第4期285-287,共3页

摘　　要： 采用高铝矾土(w(Al2O3)>85%,粒度为3～1、≤1mm)、焦炭(w(C)>82%,粒度为3～1、≤1mm)、碳化硅(w(SiC)>85%,粒度≤0.077mm)、软质黏土(w(Al2O3)>30%,粒度≤0.045mm)等为原料,用4种具有不同黏度和固定碳量的环保型结合剂,在搅拌机内搅拌40min制成高炉炮泥。在单向液压机上用5MPa的压力制成50mm×50mm的柱状试样和125mm×25mm×25mm的条状试样。根据炮泥检测仪控制炮泥的马夏值为0.70～0.73MPa,从而确定结合剂的加入量;根据炮泥检测仪检测了炮泥马夏值随时间的变化;根据拉环试验测定了300℃炮泥的剪切应力;液压机检测了烧成炮泥的常温耐压强度;电动抗折机检测了烧成炮泥的常温抗折强度;水为溶剂检测了烧成炮泥的显气孔率。结果表明:1)随着结合剂黏度的增加,炮泥中结合剂加入量增多,可塑性更好,300℃炮泥剪切应力降低;2)随着结合剂中固定碳含量的提高,炮泥烧后强度变大,显气孔率降低。 Taphole mix was prepared using high alumina bauxite （w（Al2O3） 〉85% ,particle size：3 - 1 mm, ≤1 mm）, coke （w（C） 〉82%,particle size：3 -1 mm,≤1 mm）,silicon carbide （w（SiC） 〉85%,particle size ≤0.077 mm）,and soft clay （w（Al2O3） 〉30% ,particle size ≤0. 04.5 mm） as starting materials,adding four environmental friendly binders with different viscosity and fixed carbon contents, mixing in a mixer for 40 min. Specimens with dimensions of φ50 mm ×50 mm and 125 mm ×25 mm×25 mm were prepared under a uniaxial pressure of 5 MPa. The binder addition was determined by adjusting the Marshall value within 0. 70 -0.73 MPa. The change of Marshall value of the taphole mix with time was tested. The shear stress at 300℃,cold modulus of rupture,cold crushing strength,and apparent porosity of the taphole mix specimen were determined. The results showed that： （1）as the increase of the binder viscosity,the binder addition demand increased,the plasticity of taphole mix got better, and the shear stress at 300℃ reduced;（2）as the fixed carbon content.of binder increased,the strength of sintered taphole mix increased while apparent porosity declined.

关 键 词： 环保型结合剂 黏度 固定碳含量 苯并 芘

领　　域： [化学工程] [金属学及工艺]