Los Frailes uses conventional open-pit mining methods to produce ore at a rate of 4Mt/y. Blasted ore is loaded using mining shovels into haul trucks for transport to the primary crusher. The Los Frailes open-pit mine. Los Frailes has a design capacity of 125,000t/y of zinc, 48,000t/y of lead, 4,700t/y of copper and 90.8t/y of silver.
The Los Frailes mine is owned by Boliden-Apirsa (formerly Andaluza de Piritas, S.A.), the Spanish subsidiary of Boliden, and produces about 125,000 tonnes of zinc and 2.9 million ounces (about 3,500 metric tonnes) of silver per year.
The historical resources referred to above are entirely within the past producing Los Frailes mine which is the large central lense above. The mineralization outcrops in the former open pit and is .
A controversial mine which caused one of Spain’s biggest ever environmental disasters is set to reopen, the government has announced. Los Frailes mine in Aznalcóllar, near Seville, will resume.
Continued losses at the Los Frailes zinc-lead mine in southwestern Spain have forced Boliden (BOL-T) to apply for court protection for operating subsidiary Boliden Apirsa.Apirsa, which had been losing.
Los Frailes, Spain: Poor design led to this 1998 failure, in which a 50-meter (164-mile) section of the dam’s wall collapsed, sending acidic water containing sulfur, zinc, copper, iron and lead .
On April 1, 1999, Boliden announced that it has decided to restart the Los Frailes mine. Mining operations resumed on April 6, while the mill has not yet restarted. New movements of 14 centimeters have been detected in the Aznalcóllar tailings dam, after displacements of 3 millimeters had been detected on Nov 6, 1998.