Production process

Argex grains are made of Boom clay which is reclaimed from the back clay pit by means of a bucket dredger. Every day, conveyor belts bring approximately 1,000 tons of clay to the plant for further processing. The clay is kneaded and ground, and according to the desired grain calibre, compressed into small bars. Next, these clay bars are baked in a 84m long rotary kiln at a temperature of 1100° C and expand into little round balls: 1,700 m³ of grains a day. With its production capacity of about 500,000 m³ Argex NV has the largest kiln to produce expanded clay grains in Europe.