La Caridad Smelter plant begins operations
The La Caridad smelter opened in July 1986 with a capacity of 493 t/day.
Moly plant in La Caridad
La Caridad molybdenum plant began operations in 1985, with a treatment capacity of 2,000 t/day.
New zinc refinery in San Luis Potosí
Operations began at the new San Luis Potosí zinc refinery, designed to produce 105,000 MT per year.