Ruishi Group (Baozhu Sand Branch Factory) specializes in the production of baozhu sand, also known as (cast baosha, fused ceramsite, ceramsite sand). It is smelted from high-quality bauxite materials by electric arc furnace, with an annual output of 18000. Tons of precious pearl sand are reasonably priced, and the cost performance is much better than zircon sand, chromite sand; especially low expansion, no sintering, no chalking, no cracking, no sticky sand (eliminates the negative impact of casting quality), Good recycling performance and improved casting yield.
Baozhu sand is widely used in various casting methods (melting, solid, lost foam, etc.); it is a new type of casting sand for professional precision casting, coated sand, and self-hardening sand: also used for shot peening (aluminum, copper, steel casting).
|in production||in production|
Process flow of baozhu sand: 1. Calcination 2. Electric melting 3. Granulation 4. Screening
Physical index of sharp stone precious pearl sand:
|Grain shape:||spherical||Coefficient of expansion:||(20-1000 ℃) 6 × 10-6 / ℃|
|colour:||Black-brown||granularity:||6-270 mesh (φ0.053-3.36mm)|
|Refractory temperature:||≥ 1800 ℃||Al2O3:||65-85%|
|Bulk Specific Gravity:||1.95 -2.05g / cm³||SiO2:||12-25%|
|True density:||3.4g / cm³||TiO2:||3-4.5%|
|Thermal conductivity:||(1200 ℃) 5.27W / M · K||PH value:||7-8|