The invention discloses high-performance wet green sand for a
steel casting and a preparing method of the high-performance wet green sand. High-performance wet green sand is composed, by weight, of 40-60 parts of
zircon sand, 15-20 parts of sea mud, 10-15 parts of ardealite, 25-35 parts of
diopside, 20-30 parts of polyphenyl granule, 5-10 parts of
sodium fluoroaluminate, 15-20 parts of coconut shell
powder, 10-15 parts of crushed
brick powder, 4-8 parts of hydroxypropl
xanthan gum, 3-6 parts of sulfonated
asphalt powder, 5-10 parts of bitter ling soil, 2-4 parts of
calcium sulfite, 3-5 parts of poly aluminum
chloride, 4-6 parts of polyoxyethylene, 2.5-4.5 parts of
sodium hexametaphosphate, 5-10 parts of modified kaolin and a proper amount of water. The wet green sand is good in comprehensive performance, has the high green compression strength, the high compaction rate and the low thermal expansivity, also has the good high-
temperature resistance, ventilating performance and fluidity and can effectively overcome the defects that air holes, scabbing, sand clamping, sand holes and the like can happen on the
steel casting, the surface quality of the
steel casting is improved, the finished product rate of the steel
casting is increased, and the high-performance wet green sand has important
economic benefits.