Austria Duvaz Morococha copper mine

Construction supervision of west lateral expansion stage II at Puquiococha tailings deposit.

Source: Geoservice Ingeniería

Regrowth of western section of the Puquiococha tailing dam.

Source: Brynajom

West lateral expansion the Puquiococha tailing dam Stage I.

Source: Brynajom

As part of this update of Mine Closure Plan (MCP); citizen participation mechanisms were applied in order to capture the views and expectations of the community area of ​​influence of mining operations and to establish the possible social implications that may arise due to mining closure activities .

The components of the MCP considered 03 Bocaminas (Polvorin, Oswaldo Cuadro, Carlos Reynaldo), 01 deposit tailings (Puquiococha), 01 landfill, 08 infrastructure (concentration plant, general wharehouse, among others) and 01 access.

According to directorial resolution Nº384-2012-MEM/AAM given on Nov 22nd 2012, the mine closure plan update for Austria Duvaz unit was approved meeting the technical requirements for the Peruvian Ministry of Energy and Mines.

Source: Peruvian Ministry of Energy and Mines

Development of conceptual engineering at 600 tpd. Provide a project plan to Austria Duvaz with the necessary technical specifications to enhance the continuous assurance processes.

Parts of the study include: Master plan that will allow proper planning operations in the coming years. Check, amendments and preparation of plans at the level of conceptual and basic engineering in order to build a pike. Geology, resources and reserves studies. Medium-term planning. Filling hydraulic study. OPEX - CAPEX as well as economic analysis.

Source: Proyectos y Estudios Mineros

The EIA was conducted in order to comply with the company reserve plan, Austria Duvaz needed to make changes to the production process of concentrates as well as tailings disposal for years from 2011 to 2016, ensuring therefore the life of the mine; the following components were implemented:

Expanding the capacity of the Puquiococha concentrator plant from 450 to 800 tonnes/day. Regrowth of the western sector of the Puquiococha tailings dam, final geometry from level 4,515 to 4,528 meters above sea level.

According to directorial resolution Nº081-2012-MEM/AAM given on March 16th 2012, the Austria Duvaz EIA study was approved meeting the technical requirements for the Peruvian Ministry of Energy and Mines and the environmental local regulations.

Source: Peruvian Ministry of Energy and Mines

Rod mill which function is to grind the ore to an appropriate minimum size for flotation, this is the final stage of size reduction.

The rod mill, used as a primary mill, basically consists of a horizontal rotating cylindrical drum loaded at 50% of its volume approximately with steel bars, this cylindrical drum is continuously fed by the ore coming from the crushing process as well as enough water to form the mass of ore.

Source: Peruvian Ministry of Energy and Mines

This mill receives mineral from hopper No. 5, it works also as primary mill and unlike the rod mill, the grinding elements used are steel balls of 1, 2 and 4 inches of diameter feeding almost 50% of the ball mill capacity.

Source: Peruvian Ministry of Energy and Mines

The implementation of the Mine Closure Plan (MCP) aims that the environment surrounding the mining unit recovers a condition of similar quality to the one IT had before the start of mining operations considering human health, safety, physical stability, geochemical stability, use of surface land.

The components of the MCP considered are 07 bocaminas, 01 tailings deposit, 01 landfill, 08 infrastructures and 01 access.

According to directorial resolution Nº195-2009-MEM/AAM given on July 3rd 2009, the mine closure plan for Austria Duvaz unit was approved meeting the technical requirements for the Peruvian Ministry of Energy and Mines.

Source: Peruvian Ministry of Energy and Mines

Jaw crusher which main function is to crush ore to a size of 2 inches approximately.

The jaw crusher consists of 2 jaws of manganese steel of which one is fixed and the other is mobile, ore passes and is crushed between the two jaws, where the mobile jaw performs oscillating movements produced by the rotation of an eccentric axis which in turn is driven by a signal transmitted from a motor pulley.

Source: Peruvian Ministry of Energy and Mines

Vibratory Grizzly 3' x 5' (Shaker Vibration No. l) which primary function is to classify the product either letting it move towards conveyor No.1 or sending large minerals to the primary crusher.

The operation of the vibrating screening equipment is through vibration of an eccentric shaft which is cushioned by four sets of springs producing intermittent movement according to the inclination oriented towards the hopper ore crushing.

Source: Sociedad Minera Austria Duvaz

Its function is to transfer the ore from the crusher Symons until hoppers fine. The conveyor has a FHP motor with 20HP of power and 1755RPM (460V. 24.8Amp) .

Source: Sociedad Minera Austria Duvaz

Denver Pumps 5"x4" work on stand by mode switching from one to the other, their function is to pump tailings generated on the flotation process towards the end of tailings.

Source: Peruvian Ministry of Energy and Mines

Mesh inch 4x4, BWG # 10 (3.40 mm), product presentation in rolls, black wire type, roll mesh dimension 2.02 x 25 mts.

Source: Mallas Electrosoldadas (Maelsa)