Chilled mud-core molding sand manufactured from chromite sand and method for manufacturing chilled mud-core molding sand
A technology of chromite sand and mud core, which is applied to casting molding equipment, casting molds, cores, etc., can solve the problems of aluminum casting pores, rough surface of aluminum sand parts, large consumption, etc., and achieve good high temperature collapsibility, Excellent air permeability and high production efficiency
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[0011] A chilled mud core molding sand made of chromite sand, which is made of the following parts by weight (kg) of raw materials: recycled sand 80, chromite sand 250, coal powder 13, sepiolite 33, bentonite 37, Rapeseed oil 4.6, alkali-free glass fiber 38, copper naphthenate 2.5, boric acid 1.5, furan resin 7, nanometer kaolin 43, sodium tripolyphosphate 2.5, benzene sulfonic acid 2.5, water appropriate;
[0012] The method for preparing chilled mud core sand made of chromite sand includes the following steps: put chromite sand, sepiolite, and bentonite into a calciner at 520°C for 3.4 hours, then take it out and pulverize Then add rapeseed oil, appropriate amount of water, stir and disperse, smelt the mud, send it to 1450℃ calciner for 5 hours, take out and crush to 80 mesh to obtain calcined material; combine alkali-free glass fiber and naphthenic acid Mix copper and boric acid, grind for 25 minutes, then mix with other remaining ingredients for 13 minutes.
[0013] Process pe...
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