Preparation of raw materials HESS AAC SYSTEMS
A ball mill wet grinds the quartz sand with water to a sand slurry The sand slurry is stored in slurry tanks and pumped into the slurry weighing hopper in the mixer tower The binders lime cement and anhydrite are stored in silos It is also possible to mill the anhydrite together with the sand in the ball mill The aluminium powder or paste is prepared in a separate building where it is