Provider of construction services and manufacturer of chemical products. The company is engaged in the production of copper sulfate, zinc vitriol and nickel sulfate, as well as in the realization of tin. It also offers industrial and civil construction works, including production units, administrative buildings, warehouses, granaries, pre-cast reinforced concrete foundations, elevated structures, sport and health care centers, residential and office buildings, shopping malls and entertainment centers, schools, banks, gasoline stations, medical institutions, and others.