Magnesita Refratarios SA engages in the provision of refractory solutions, services, and industrial minerals. It operates through the following segments: Refractory Solutions, Minerals, and Services. The Refractory Solutions segment offers bricks, masses, mortars, valves, and pre-molded concrete. The Minerals segment comprises of magnesite sinter and caustic magnesia. The Services segment includes processes ranging from refractory assembly and removal to monitoring the customer's production process and conducting post mortem tests. The company was founded in 1939 and is headquartered in SÃ£o Paulo, Brazil.