Rapid heat dissipation foundry molding sand and preparation method thereof
A casting type, rapid technology, applied in the direction of casting molding equipment, casting molds, cores, etc., can solve the problems of difficult recycling, toxic gas pollution, poor heat resistance, etc., and achieve good surface quality and high temperature collapse. , good fluidity effect
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[0014] A fast heat dissipation foundry sand made of the following parts by weight (kg) of raw materials: clay 210, zircon powder 25, boiler slag 25, graphite powder 18, epoxy soybean oil 2.5, Tween 80 1.3, water glass 5, Fused mullite powder 6, nano α-alumina 4, yttrium oxide 2.5, appropriate amount of water, and additive 25;
[0015] The additive is made of the following parts by weight (kg) of raw materials: alumina 15, titanium dioxide 3.5, quartz sand 4, tall oil 0.7, magnesium stearate 1.2, ethylene bisoleic acid amide 0.5, Bi2O3 1.5, B2O3 1.5. Clay 3.5, silane coupling agent KH-550 1. Appropriate amount of water; preparation method: mix alumina, titania, quartz sand, Bi2O3, B2O3, put it into a dry pot and heat until it melts, add cold water to chill and crush Into particles with a particle size of ≤1.5mm; add clay and silane coupling agent KH-550 into 4.5 parts by weight of water, stir and add the particles, grind for 25 minutes, dry, and pulverize, the particle size is...
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