SOTRAFRANCE Ingénierie (ex CdF INGENIERIE) is a company which was created in 1971, to develop the internal know-how of Charbonnages de France and the Houllières of the basin of North and Pas-de-Calais as regards:

- Treatment of coals (handling, storage, crushing, proportioning),
- Carbonization,
- Combustion

In the field of the iron and steel coking plants and power stations.

Since, the company extended its know-how and its field of action to the whole of fuels, in the total respect of the environment.

Within the framework of the policy of transfer of credits and perinisation of the activities of the Charbonnages de France, the site of Douai of the ex-subsidiary company of the Charbonnages de France to open its capital to the group SOTRAMON with which synergies in the field of ENERGY are significant.