Novel artificial casting sand and its preparing method
A foundry sand and artificial technology, which is applied in the direction of casting molding equipment, molds, cores, etc., can solve the problems of high thermal expansion rate, low recycling rate, and easy breakage of silica sand, and achieve low thermal expansion rate and suppress casting defects.
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Embodiment 1
[0017] A new type of artificial foundry sand of the present invention adopts AL 2 o 3 45-90% silica alumina as raw material.
Embodiment 2
[0019] A kind of preparation method of novel artificial foundry sand is:
[0020] 1. Will contain AL 2 o 3 45-90% bauxite ore is added to an electric arc furnace (the size of the furnace is 650-850mm cube), and arc discharge is used to generate high temperature to be calcined and melted into liquid.
[0021] 2. When the liquid flows out of the furnace, apply an air pressure of 70-85m / s (pressure 3.0-8.0kg / cm 2 ), using strong wind to crush and cool the liquid raw material to obtain spherical sand particles.
[0022] 3. Sieve the spherical sand to produce a new type of artificial foundry sand.
Embodiment 3
[0024] The novel artificial foundry sand of the present invention can be used in molding methods such as furan resin, phenolic resin, phenolic urethane resin, water glass and bentonite.
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