Abstract: In order to reduce the cost while enhance the quality of zircon ramming material，and
improve the construction efficiency on site，experiments on the dosage of fused zirconia-corundum
powder under the action of two different binding agents，industrial phosphoric acid（85%）and silica
sol（40%），are conducted using zircon bricks and zircon sands as aggregates，and zircon powder，
zircon micro powder，and recycled electrofused zirconia-corundum powder as fine powders. The
results show that zircon ramming material with 5% recycled fused zirconia-corundum powder dosed
and silica sol（40% concentration）as binding agent has short curing time，low apparent porosity，
high strength and good construction performance. In the industrial experiments conducted，a glass
kiln used for more than 4 years but still in good conditions is used，with its bath bottom meeting the
service life and construction requirements，to present a good effect.

Key words: Zircon ramming material, Recycled fused zirconia-corundum powder, Silica sol