| 摘要 |
<p>A supply of wet mortar or concrete to be treated is introduced into a receptacle (1), and water added to break up the mortar or concrete and form a slurry. The slurry is passed through a screen (2) which removes material and objects coarser than sand. The slurry which passes through the screen (2) is then introduced to sand filtering means (3) which removes sand from the slurry, which sand is collected for re-use. The remainder of the slurry which has passed through the sand filtering means (3) is collected. The sand filtering means (3) may remove the sand in different grades, and may comprise one or more vibratory screens (4,5).</p> |
