The silica sand in the Frechen deposit was formed in the early Miocene, and extraction began in 1884. Today, several modern bucket-wheel excavators are in use on two strip-mining stopes.

The silica sand is processed and sorted into categories F 31, F 32, F 34 and F 36, which are available for delivery as wet or dry sand.  An adjacent milling facility produces MILLISIL  quartz flours W 3, W 6, W 8, W 10 and W 12, as well as SIKRON flours SF 300 , SF 500, SF 600 and SF 800 (quartz); SF 3000, SF 4000 and SF 6000 (cristobalite). Other industrial minerals such as wollastonite are also refined into products of the highest quality.

Plant	Loading times	Loading point
Frechen	Wet and dry sand Mon.-Fri. 6.00 a.m. – 20.30 p.m Loose silica flour 06.00 a.m – 20.00 p.m. Packaged goods  6.00 a.m. – 16.30 p.m. Container loading 6.00  –  14.00 Uhr with prior coordination with the shipping office (+49 2234/101-514/515/516)	Kaskadenweg 70 – 82, 50226 Frechen