Refractory material
The invention provides a refractory material which is used for solving the technical problems of hearth air leakage and bad effects in thermal insulation, energy conservation and environmental friendliness caused by low refractoriness and low strength of the refractory material in the existing cremator. The refractory material consists of 2-8 parts of Al2O3 micro powder, 2-8 parts of SiO2 micro powder, 0.1-20 parts of mullite with diameter of 5-8mm, 18-24 parts of mullite with diameter of 3-5mm, 16-26 parts of mullite with diameter of 1-3mm, 6-20 parts of mullite with diameter of 0.1-1mm, 10-32 parts of cement, 5-12 parts of aluminum micro powder and 8-12 parts of expanding agent. The refractory material provided by the invention can be widely applied to the cremator hearth. 1. A refractory material, characterized in that according to the weight of the following components: 2-8 parts Al2 O3 micropowder, 2-8 portions of SiO2 powder, 0.1-20 parts of diameter is 5-8mm mullite, 18-24 portions of diameter is 3-5mm mullite, 16-26 portions of diameter is 1-3mm mullite, 6-20 portions of diameter is 0.1-lmm mullite, 10-32 portions of cement, 5-12 parts and aluminum fine powder 8-12 parts of the bulking agent. 2. According to Claim 1 of refractory material, which is characterized in that according to the weight of the following components: 4 parts of Al2 O3 powder, 3 parts of SiO2 micropowder, 13 parts of diameter is 5-8mm mullite, 15 parts of diameter is 3-5mm mullite, 20 parts of diameter is 1-3mm mullite, 14 parts of the diameters of the mullite 0.1-lmm, 18 parts of cement, 8 parts of aluminum fine powder and 9 parts of the bulking agent. 3. Refractory material as in Claim 1 or Claim 2, characterized in that the stated states the plumping agentzenolite and cyanite to any one or a mixture of both. 4. Refractory material as in Claim 1 or Claim 2, characterized in that the Al2 O3 micropowder Al2 O3 content ≥ 98%, is not greater than the maximum diameter of 5 the particle content m> 85%. 5. According to Claim 4 of refractory material, is characterized in that the stated SiO2 micropowder SiO2 content ≥ 90%, is not greater than the maximum diameter of the 1 particle content m> 85%. 6. According to Claim 5 refractory material, is characterized in that the in all porzite Al2 O3 content ≥ 60%, Fe2 O3 ≤ 1% content, bulk density ≤ 1.2g/cm3, ≥ 22% porosity, ≥ 12 MPa compressive strength, the average pore diameter ≤ 50 m, mullite crystal content ≥ 45%. 7. According to Claim 6 of refractory material, which is characterized in that the cement to Al2 O3 content ≥ 60%. 8. Refractory material according to Claim 7, characterized in that the in states the aluminum fine powder Al2 O3 content ≥ 85%, 320 particle content purpose of ≥ 65%.