| 摘要 |
<p>Rendering mineral residues from the crushing of motor vehicles inert consists of: adding the mineral residues to water to form a paste; mixing this paste with phosphoric acid; and subjecting the resulting mixture to calcination. The granulometry of the mineral residue is between 0.5 and 1.5 mm. The quantity of phosphoric acid added is between 5 and 20% and the calcination operation is carried at 630-680 deg C or at 730-780 deg C or at 830-900 deg C.</p> |
