Porcelain stoneware production process and products

A process for preparing a porcelain stoneware product comprising:

• treating ashes with carbonation reactions for at least 20 days to lower a pH of the ashes, wherein the ashes are residual from combustion of urban waste;
• performing deferrization and de-metallization of the ashes;
• combining the ashes with a plurality of raw materials for preparing porcelain stoneware to provide a mixture, wherein the mixture comprises between 1% and 40% by volume of the ashes;
• grinding a dose of the mixture to provide a particle size of less than 150 m;
• and
• homogenizing the mixture with wetting during a rotation phase to provide a humidity rate between 4% and 8%,
• wherein the porcelain stoneware product comprises a tread surface, a base surface, and an average thickness extending from the tread surface to the base surface of greater than or equal to 4.5 cm, and
• wherein said ashes have a composition of:
• Na2O
• MgO
• Al2O3
• SiO2
• P2O5
• SO3
• Cl2O
• %
• 2.84
• 2.75
• 17.08
• 36.08
• 1.23
• 0.85
• 1.12
• K2O
• CaO
• TiO2
• Fe2O3
• CuO
• ZnO
• %
• 1.06
• 30.21
• 1.74
• 4.03
• 0.45
• 0.56.