High-strength alkali-resistant light refractory castable and preparation method thereof

The invention discloses a high-strength alkali-resistant light refractory castable which comprises the following raw materials in parts by mass: aggregate and a matrix material, the aggregate comprises 55-75 parts of light refractory mullite particles, and the matrix material comprises 10-20 parts of a binder. The matrix material comprises 12-18 parts of refractory clay fine powder, 3-6 parts of barium carbonate fine powder, 3-6 parts of zirconite fine powder, 4-8 parts of magnesium aluminum hydrotalcite fine powder, 2-4 parts of silica sol and 4-10 parts of pure calcium aluminate cement. The high-strength alkali-resistant lightweight refractory castable prepared by the invention has the characteristics of high strength, good volume stability and strong alkaline medium erosion resistance. 本发明公开了一种高强耐碱轻质耐火浇注料，包括原料，所述原料包括以下质量份数的骨料和基质料，所述骨料包括55~75份的轻质莫来石耐火颗粒，基质料包括12~18份耐火粘土细粉、3~6份碳酸钡细粉、3~6份锆英石细粉、4~8份的镁铝水滑石细粉、2~4份的硅溶胶和4~10份的纯铝酸钙水泥。本发明所制备的高强耐碱轻质耐火浇注料具有强度高、体积稳定性好和抗碱性介质侵蚀能力强的特点。