Manufacturers supply high-quality coated sand Baozhu sand

Chinese Name: Sarah sand, also known as sand casting treasure. Definition: Baozhu sand is the raw material for high-quality calcined bauxite in the molten state by spraying process to be recrystallized forming spherical sand. Product Features 1. The particle shape: spherical 2. angular coefficient: ≤1.1 mimicking spherical 3. Density (bulk): 1.95-2.05 (g / cm3) 4. refractoriness: ≥1790 ℃ 5. Thermal expansion coefficient: 0.13% (1000 ℃ heating 10 minutes) 6, PH value: 7.2-7.8 main chemical composition Al2O3 SiO2 Fe2O3 TiO2 CaO MgO K2O Na2O% ≥73 10-20 ≤5 ≤5 ≤1.5 ≤1.5 particle size distribution in the 0.053 mm???? (270 mesh) ~ 2.0mm (10 mesh) between customers according to their process requirements, the particle size distribution as specified. Features and Benefits Features 1. dense spherical particle shape: spherical grain shape, smooth surface and a surface area of ??small, excellent fluidity and filling. Therefore, in the mold to obtain good strength and high permeability, while compared with other sand can significantly reduce the amount of the binder used. It also has excellent collapsibility. 2. The low thermal expansion: thermal expansion coefficient than other foundry sand. Therefore, production of high precision casting size, small cracks and defects, the casting yield. 3. Good resistance to crushing: Volume Baozhu sand dense, high strength, repeated use of renewable rarely broken, sharp sand to improve reclamation and reuse rate and reduce the waste sand emissions and environmentally friendly. 4. refractoriness High: The main ingredient is aluminum oxide, PH value neutral, belong to Al-Si refractory materials, good fire resistance, to meet the requirements of various metals and alloys. ? ※ Sarah performance advantages compared to sand and silica sand has the following advantages: 1, Sarah sand refractoriness higher than silica sand, high and tight shape when filled, therefore, can improve the surface quality of the casting, production scrap rates reduced; 2, spherical orb sand good liquidity, complex shape castings, internal angle, deep recesses, holes and other difficult to fill flat parts, are easy to fill tight. Thus, these parts can significantly reduce packet sand defect greatly reduce the workload of cleaning and finishing; 3, good resistance to crushing, high recovery, waste emissions are correspondingly reduced; 4, thermal expansion coefficient is small, good thermal stability, which leads to swelling defect secondary phase transition does not occur, greatly improving the dimensional accuracy of the Pearl of sand, although the price is higher than a lot of sand, such as used properly, comprehensive accounting down, not only can significantly improve the quality of casting, but also lower production costs; 5, Baozhu sand grain shape is spherical, the contact surface of the contact point, to achieve the same resin less strength you need, thereby greatly reducing the cost of production. ? ※ Baozhu sand and chromite sand compared to the following advantages: 1, a bulk density of less than chromite sand, reduce the cost of high-quality sand 2, mimicking spherical grain type, use less adhesive 3, anti-broken good, increase the recovery rate and good regeneration properties 4, chromite sand chromium and its compounds can cause heavy metal pollution, environmental pollution Baozhu sand, are environmentally ※? Baozhu sand and zircon sand compared to exist the following advantages: 1, Sarah mimicking spherical sand type, use less adhesive 2, with respect to resource shortages expensive zircon sand, its raw materials stocked, low price. 3, its resistance to breakage resistance, high recovery rate, can be recycled, which saves zircon sand while protecting the environment, avoiding the radioactive zircon sand damage to front-line workers