Light-weight Al2O3-SiC-C refractory casting material and preparation method thereof

Abstract

The invention relates to a light-weight Al2O3-SiC-C refractory casting material and a preparation method thereof. The light-weight Al2O3-SiC-C refractory casting material comprises the following raw materials: 40-55 wt% of porous corundum particle, 8-12 wt% of corundum particle, 6-12 wt% of SiC particle, 6-10 wt% of SiC fine powder, 5-8 wt% of corundum fine powder, 8-12 wt% of active aluminum oxide micropowder, 3-5 wt% of calcium aluminate cement, 2-4 wt% of silicon oxide micropowder, 2-4 wt% of ball asphalt, 1.5-2.0 wt% of silicon powder, 0.1-0.3 wt% of aluminum powder and 0.1-0.3 wt% of boron carbide powder. The preparation method comprises the following steps: mixing the raw materials with 8-15 wt% of water, 0.2-0.6 wt% of water reducing agent and 0.02-0.04 wt% of organic explosion-proof fiber, stirring, casting, molding, and naturally drying at 110 DEG C for 12-48 hours to obtain the light-weight Al2O3-SiC-C refractory casting material. According to the invention, the process is simple; and the prepared product has the characteristics of high strength, excellent thermal shock stability, low heat conductivity and high medium erosion resistance, and also has the advantage that the apparent porosity and pore size can be controlled.

Description

technical field

[0001] The invention belongs to the technical field of lightweight castables. Specifically related to a light Al 2 o 3 -SiC-C refractory castable and preparation method thereof. Background technique

[0002] al 2 o 3 -SiC-C and Al 2 o 3 -SiC refractories are the main lining materials for special equipment for storage, transportation and processing of high-temperature molten iron, such as tapping troughs, torpedo-type mixed iron cars, mixed iron furnaces, and ladles (tanks). Refractory materials are composed of aggregate and matrix. Traditional Al 2 o 3 -SiC-C and Al 2 o 3 -SiC refractory materials are dense refractory materials, usually with dense white corundum, brown corundum and alumina as aggregates. In order to prepare dense aggregate, raw materials must be sintered or fused at high temperature, which will cause a lot of energy consumption and environmental pollution; at the same time, dense Al 2 o 3 -SiC-C and Al 2 o 3 -SiC refractories ...