Philex Mining Corporation was incorporated in the Philippines on July 19, 1955 and was listed on the Philippine Stock Exchange since Nov. 23, 1956.
Nestled at the vicinity of Santo Tomas II orebody, the Padcal Mine site has been operating for over 58 years. Formally, it is situated in Sitio Padcal, Barangay Camp 3, Municipality of Tuba, Province of Benguet, Cordillera Administrative Region (CAR) in the northern Philippines.
The company’s milling plant was originally situated adjacent to the site but was relocated to Banget area, a few kilometres below the mountainside, in the late 1960s. This was prompted by the need for a more strategic location as the mine shifted from surface to underground block caving.
The milling operation, which started in 1958, processes the ore delivered from the mine site at an initial capacity of 800 tons per day. It then gradually expanded throughout the years to meet the increasing mine production demand and eventually reach its current operation capacity at 28,000 tons of ore per day.
Milling consists of three major processes: comminution, concentration and dewatering.
Comminution is done in three stages of size reduction, each with intermediate screening stages. The first one is primary crushing which employs Jaw Crushers to reduce the particle size to -4”. Its product is then fed into the closed-circuit secondary and tertiary crushing plant using Cone Crushers to reduce the particle size to -3/8”. The final stage of comminution is grinding which utilizes Ball Mills to produce a final product size of <150 (P80).
To extract the valuable minerals, the subsequent Mineral Concentration is done by Sulphide Flotation process via roughing and a three-stage cleaning. Roughing is done in Wemco Cells, which are a blend of conventional cells and Smart cells™, while cleaning is through a series of conventional Wemco cells and column cells. This is followed by dewatering stage using thickener and drum filters to produce a final concentrate with ~12% moisture.
The concentrate, which contains 22-25% Cu, 45-50g Au/ton and 40-45g Ag/ton is transported into the company’s loading port facility for storage and shipment.
The final tailings are also dewatered using thickeners, wherein the water recovered is re-used in the plant. The remaining dense slurry is fed into the tailings storage pond (Tailings Storage Facility or TSF).