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Roasted sand

A high-quality resin sand process substrate obtained by high-temperature treatment.

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A high-quality resin sand process substrate obtained by high-temperature treatment. The sand has the characteristics of clean surface, low expansion rate, low mud content, low burning reduction, etc., in the resin sand process can greatly improve the bonding efficiency, reduce the amount of resin addition, reduce the amount of sand core gas, and at the same time, due to the phase change of silicon sand, can reduce the expansion of casting type pore defects.

 

 

particle size composition Moisture content Silt content Burning reduction Consumption value angular factor Expansion rate
40/70
50/100
70/140
≤ 0.1% ≤ 0.10% ≤ 0.10% ≤ 2.5 ≈ 1.2 <1.1%

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