High-compressive-strength composite modified sodium silicate sand for pump valve castings, and preparation method thereof
A technology of compressive strength and water glass sand, which is applied in casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of difficulty in improving the quality of pump and valve castings, difficulty in recycling old sand, and low strength at room temperature, and achieve excellent room temperature. Wet strength, improvement of stress defect, effect of low dosage
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[0012] The water glass sand in this example is prepared from the following raw materials in parts by weight: 50 mesh zircon sand 40, 80 mesh white corundum powder 30, graphite powder 1, 100 mesh alumina 8, perfluoropolyether 1, potassium carbonate 0.8, modified Water glass adhesive 1.5, bentonite 2, choline chloride 0.1, nano calcium fluoride 0.4, 50% ethanol aqueous solution 8, silane coupling agent 0.1.
[0013] Wherein the modified water glass adhesive is made of the following raw materials by weight: water glass 12 of 40 Baume degrees, magnesium aluminum silicate 0.1, bacterial cellulose 2, quaternary ammonium salt ionic liquid 6; its modification preparation method is : first put the bacterial cellulose into the quaternary ammonium salt ionic liquid, heat to 40°C, stir and mix for 2 hours, then add other remaining materials, continue to stir and mix for 40 minutes to obtain the product.
[0014] The preparation method of this embodiment water glass sand is:
[0015] (1) ...
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