High-efficiency chilling molding sand and preparation method thereof
A technology of chilling and molding sand, which is applied to casting molding equipment, casting molds, and cores, etc. It can solve problems such as rough surface of aluminum sand parts, poor air permeability of sand molds, and toxic gas pollution, etc., and achieve enhanced effects and excellent bonding Sex, the effect of solving shrinkage cavity
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[0011] A high-efficiency chilled molding sand made of the following raw materials in parts by weight (kg): chromite sand 250, bauxite 110, brown corundum 25, nano carbon powder 1.5, calcium aluminate cement 1.5, α-Al2O3 micropowder 3.4, Steel fiber 11, sodium tripolyphosphate 2, dimethyl silicone oil 1.4, ferrocene 1.5, furan resin 4, benzenesulfonic acid 2.5, water as appropriate;
[0012] The preparation method of the high-efficiency chilled molding sand comprises the following steps: putting chromite sand and bauxite into a calcination furnace at 530°C for 4 hours, then taking them out, crushing them into 300-mesh powder, adding sodium tripolyphosphate, Ferrocene, appropriate amount of water, stirred and dispersed, smelted, put into calcination furnace at 1440°C for 4 hours, took out and pulverized to 70 mesh to obtain calcined material; calcium aluminate cement, α-Al2O3 micropowder, steel fiber, tripolymer Mix sodium phosphate and simethicone oil, grind for 34 minutes, and...
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