Preparation of raw materials
A ball mill wet-grinds the quartz sand with water to a sand slurry.
Raw material preparation and mixing
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 dispersed in water. All the components are accurately weighed, and are released into the mixer in a pre-defined order. The HESS AAC SYSTEMS recipe and temperature control system constantly monitors this process.
HESS AAC SYSTEMS also has the knowledge and the experience to produce AAC with alternative raw materials, for example with fly ash.
The use of aerated concrete
is steadily increasing.
Innovative building systems with aerated concrete are the future!
Process control and plant automation
The entire production process is controlled by modern automation systems…
Unloading and packing
After the autoclaving is completed, the cakes are destacked and un-loaded from the cooking frames.
In the autoclaves the cakes are cured for ca. 10–12 hours at a temperature of 190° C with saturated steam at a pressure of 12 bar.
Tilting back and green separation
The HESS AAC SYSTEMS plants have combined the advantages of the tilt-cake and ﬂat-cake system.
HESS AAC SYSTEMS plants are ideal for the production of large format reinforced assembly components.