Headquartered in Vienna/Austria, Seven Refractories offers an extensive portfolio of refractory materials. The product portfo ... lio is complemented by the project management skills of dedicated technical personnel as well as ISO 9001 and ISO 14001 certifications. With a modern greenfield plant in Slovenia, seven international subsidiaries and numerous agencies, Seven serves top customers in 40 countries, among them NLMK, Voest Alpine, Isdemir, Arcelor, Severstal, Breitenfeld AG, Holcim, and Heidelberg Cement. read more