Ceramic tile using sludge slag.

摘要

The ceramic tile using sludge slag of the present invention comprises: sludge slag : from 5 to 70 wt.%, agalmatolite : from 20 to 90 wt.%, clay : from 5 to 50 wt.%, and the balance being incidental impurities. The sludge slag is obtained by separating sludge from sewage, burning the thus separated sludge into ash, melting the resultant ash and solidifying the thus melted ash. The sludge slag consists essentially of: silicon dioxide (SiO2) : from 10 to 50 wt.%, aluminum oxide (A l 2O3) : from 3 to 20 wt.%, phosphorus pentoxide (P2O5) : from 1 to 30 wt.%, calcium oxide (CaO) : from 10 to 70 wt.%, magnesium oxide (MgO) : from 0.5 to 20 wt.%, and iron oxide (Fe2O3) : from 5 to 25 wt.%. t