Magnesium oxysulfate fireproof plate for tunnel and preparation method of magnesium oxysulfate fireproof plate

The invention relates to C04B 28/30, in particular to a magnesium oxysulfate fireproof plate for a tunnel and a preparation method of the magnesium oxysulfate fireproof plate. Comprising the following raw materials in parts by weight: 20-45 parts of magnesium oxide powder, 10-25 parts of magnesium sulfate powder, 20-40 parts of a filler, 1.7-3.2 parts of a reinforcing material, 0.1-0.4 part of a protein foaming agent and 0.05-3.5 parts of a modifier. The prepared magnesium oxysulfate fireproof plate for the tunnel is good in fireproof performance, high in breaking strength, good in impact resistance and good in moisture regain resistance. 本发明涉及C04B 28/30，具体涉及一种隧道用硫氧镁防火板及其制备方法。包括以下原料，按重量份计，氧化镁粉20-45份，硫酸镁粉10-25份，填料20-40份，增强材料1.7-3.2份，蛋白类发泡剂0.1-0.4份，改性剂0.05-3.5份。本发明制备的一种隧道用硫氧镁防火板防火性能好，抗折强度高，抗冲击性好，抗返潮性好。