Mullite for Direct Supply of Cast Steel Parts Without Cracks¹

Product Description Chemical composition of Mo Lai sand: 46% ≥ Al2O3 ≥ 42%; 53%≥SiO2≥51%,1.2≤Fe2O31≤1.5%; Na2O+K2O≤0.3%; CaO+MgO2≤0.6%; TiO2≤0.1%;Physical indicators: density ≥ 2.5g/cm3, true specific gravity>2.6g/cm3, moisture content<0.03%, fire resistance ≥ 1750 oC, ignition loss ≤ 0.3-0.4%, dust content ≤ 0.01-0.03%, pH value 7-9.Molossa is a refractory material made of aluminum silicate, commonly used in precision casting of stainless steel, cast iron, and copper casting processes. The fire resistance is around 1750 degrees. The higher the aluminum content and the lower the iron content in the mullite sand, the smaller the dust and the better the quality of the mullite sand product. Mo Lai Sha Jiao Gemstone is made by high-temperature calcination.The particle size of Mo Lai sand generally ranges from 8-16 mesh, 16-30 mesh, 30-60 mesh, 60-80 mesh, and 80-120 mesh;Molai powder generally has 200 mesh, 300 mesh, etc.In precision casting technology, the general surface slurry is: 325 mesh zirconium powder+silica sol; Sand+Zirconium Sand 120 meshBack layer slurry: 325 mesh zirconium powder+silica sol; Molai powder 200 mesh+Molai sand 30-60 meshReinforcement layer: Mo Lai powder 200 mesh+silica sol; Molai sand 16-30 meshSealing paste: Mo Lai powder 200 mesh+silica solAdvantages of Mo Lai Sha: The castings cast are easy to peel off, do not deform, are not easy to shrink, have good smoothness, and have a high yield of finished products.Chemical composition of mullite sand and mullite powder (industry standard)gradeAL2O3SiO2Fe2O3Na2O+K2OCaO+MgOTiO2super45-4652-530.8-10.3-0.40.5-0.60.1-0.2Level 144-4551-521-1 20.4-0.50.5-0.60.2-0.3level 243-4550-511.5-1.80.4-0.50.5-0.60.2-0.3three-level43-4450-512.0-3.00.4-0.50.5-0.60.2-0.3Physical indicators of Mo Lai sand and Mo Lai powder:gradedensitywater contentrefractorinessBurn off a small amountDust contentph valuesuper2.5g/cm30.03%≥1750oC≤0.3-0.4%≤0.01-0.03%7-9Level 12.45g/cm30.03%≥1650oC≤0.4-0.5%≤0.01-0.03%7-9level 22.45g/cm30.03%≥1550oC≤0.5-0.6%≤0.01-0.03%7-9three-level2.40g/cm30.03%≥1450oC≤0.6-0.8%≤0.01-0.03%7-9

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