Metals-Chemicals Division

The metals business operates the largest non-ferrous metallurgical complex (Met-Mex Peñoles) in Latin America, and the fourth largest in the world in terms of production value. Its facilities include a lead foundry, a lead-silver refinery and an electrolytic zinc refinery; it also operates plants that make sulfuric acid, cadmium, bismuth, ammonium sulfate, and liquid sulfur dioxide.

The Chemicals business is engaged in the production and sale of sodium sulfate, magnesium oxide, magnesium sulfate, and ammonium sulfate (fertilizer). It has the largest sodium sulfate plant (Química del Rey) in the world.