SEPPE Mullite sand 30-60 mesh

Mullite Sand

Mullite sand is aluminum silicate refractory materials, normally used in stainless steel precision casting technology. Refractoriness is around 1750 degrees. Mullite sand with more aluminum content and lower iron content indicates better quality, and lower dust content indicates better quality. Mullite sand is made by kaolin through high heat sintering. Mullite sand origin in mainly distributed in the zhangqiu shandong and north of anhui and so on.

Mullite sand general type are 8-16 mesh, 16-30 mesh, 30-60 mesh, 60-80 mesh, 80-120 mesh;

Mullite powder type are 200 mesh, 300 mesh, etc. In the precision casting process,

General chemical ingredients: 46%≥Al2O3≥42%，53%≥SiO2≥51%，1.2≤Fe2O31≤1.5%，Na2O+K2O≤0.3%，CaO+MgO2≤0.6%，TiO2≤0.1%.

Physical index:Density≥2.5g/cm3, Proportion >2.6g/cm3，Water content < 0.03%，Refractoriness≥1750℃，Heat decrement≤0.3-0.4%，Dust≤0.01-0.03%，PH 7-9，hardness >8.0Mpa.

Advantages: Pouring casting, Easy to shell, Ametabolic, not easy to reduced scale, bright and clean, high yield.