High-strength light silica brick and preparation method thereof

The invention discloses a high-strength light silica brick which mainly comprises the following components in parts by weight: 80-120 parts of silica fine powder, 6-12 parts of silica powder, 3-10 parts of a mineralizer, 1-3 parts of a water reducing agent, 3-8 parts of saw dust and 2-4 parts of polystyrene spheres. The mineralizing agent is modified attapulgite. The attapulgite is modified, and the modified attapulgite serves as a mineralizer and a binding agent of the silica brick at the same time, so that the problems of poor binding force between the mineralizer and the binding agent and environmental pollution caused by gas generated by decomposition of the mineralizer in the prior art are solved, and the strength and thermal shock resistance of the silica brick are also improved; meanwhile, the silica brick has good light weight, high-temperature volume stability and corrosion resistance. 本发明公开了一种高强轻硅砖，所述硅砖主要由以下重量份数的各组分组成：硅石细粉80-120份、硅微粉6-12份、矿化剂3-10份、减水剂1-3份、锯末3-8份和聚苯乙烯球2-4份；所述矿化剂为改性凹凸棒土。本发明通过对凹凸棒土进行改性