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Peru
Julcani Mine

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 Location:
500 km SE from Lima, Peru

  Regional Office:
Las Begonias 415, 19th Floor, San Isidro
Lima
Peru
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
  • Lead
  • Copper
Mining Method
  • Overhand Cut & Fill
Processing
  • Flotation


Owners

Source: p. 54
CompanyInterestOwnership
Compania de Minas Buenaventura S.A.A. 100 % Direct
Julcani mine is wholly-owned and operated by Compania de Minas Buenaventura S.A.A.

Deposit Type

  • Epithermal


Summary:

Julcani is a fracture-filling silver-bearing epithermal deposit with Ag-Pb-Bi-Cu-WO3 mineralization, hosted in a complex of dacitic/rhyolitic domes from the Tertiary. The most important system of structures runs NW-SE, followed by E-W and NE-SW. It is important to note the zoning, wherein the central part (Tentadora dome) exhibits an Au-Bi-WO3 ensemble that changes to Ag- Pb toward the edges. Historically, the most important mines have been Herminia, Nueva Herminia, Mimosa, and Manto. The Acchilla and Estela Mines are currently in operation. The minerals present include tetrahedrite, argentite, silver sulfosalts, galena, sphalerite, and chalcopyrite, with gangues of siderite, pyrite, barite, silica, and calcite.


Mining Methods

  • Overhand Cut & Fill


Summary:

Over the course of its history, it has had several areas of exploitation. Operations are currently underway at Acchilla and Estela, where there are eight levels, with the highest being 420 and the lowest being 710. The shafts are located in Acchilla. Exploitation is carried out using the conventional overhand cut and fill method. The waste is recirculated to the pits, and the excess material is transported to the barren material deposits on the surface. Mine water drainage is performed using pumping stations located near shafts 487 and 993, with maximum flow volumes of 120 l/s. There is an acid water treatment plant at Acchilla, with a capacity of 180 l/s.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

At Julcani, the ore enters via hoppers and is sent to the washing mill, the crusher, and then to the bar and ball mills. The process continues in the flotation cells, thickener, and press filter. Finally, a silver-lead-copper-gold concentrate is obtained, while ore with low metal content is disposed of in the Acchila tailings pond.

Treatment Capacity: 600 MTD.

Recoveries & Grades:

CommodityParameter20192018201720162015
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Head Grade, g/t 681.16726.27552.71606.83597.66
Lead Head Grade, g/t 0.091.010.151.761.55
Copper Head Grade, % 0.160.160.150.180.21
Gold Head Grade, g/t 0.040.120.120.22
Subscription required - Subscription is required.

Production:

CommodityUnits202020192018201720162015
Silver koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required2,2503,2643,266
Lead M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20192018201720162015
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required173,865 t177,948 t
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required173,865 t177,948 t
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required550 t
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Proven 166,957 t Silver 654.09 g/t 3,511,027 oz
Proven 166,957 t Gold 0.207 g/t 1,112 oz
Proven 166,957 t Lead 2.09 % 3,490 t
Proven 166,957 t Copper 0.45 % 748 t
Probable 88,140 t Silver 652.78 g/t 1,849,828 oz
Probable 88,140 t Gold 0.113 g/t 320 oz
Probable 88,140 t Lead 1.84 % 1,618 t
Probable 88,140 t Copper 0.38 % 338 t
Proven & Probable 255,097 t Silver 653.64 g/t 5,360,855 oz
Proven & Probable 255,097 t Gold 0.17 g/t 1,432 oz
Proven & Probable 255,097 t Lead 2 % 5,108 t
Proven & Probable 255,097 t Copper 0.43 % 1,086 t

Commodity Production Costs:

CommodityUnits20192018201720162015
Cash costs (sold) Lead USD  ......  Subscription required  ......  Subscription required 2,543 / t 1,241 / t 1,425 / t
Cash costs (sold) Copper USD  ......  Subscription required  ......  Subscription required 6,318 / t 2,837 / t 4,416 / t
Cash costs (sold) Silver USD  ......  Subscription required  ......  Subscription required 17.1 / oz 11.6 / oz 12.3 / oz
Cash costs (sold) Gold USD 825 / oz 955 / oz
Subscription required - Subscription is required.

Financials:

Units20192018201720162015
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.32  
Revenue M USD  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -0.86  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -5.43  
After-tax Income M USD  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 17, 2020
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
................................... Subscription required 2018
Form 20-F 2017
Annual Report 2016
Form 20-F 2016
Press Release 2016
Subscription required - Subscription is required.

Aerial view:

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