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Brazil
Barro Alto Mine

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 Location:
11 km SW from Barro Alto, Brazil

  Regional Office:
Avenida Paulista, 2300 - 10º andar CEP 01310-300
Sao Paulo
Brazil
SP 01310-300
Phone  ...  Subscription required
Fax+55 11 2125-7500
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Nickel
Mining Method
  • Truck & Shovel / Loader
Processing
  • Calcining
  • Rotary kiln & Electric furnace
Mine Life19 years (as of Jan 1, 2019)


Owners

 
CompanyInterestOwnership
Anglo American plc. 100 % Indirect

Deposit Type

  • Laterite
  • Saprolite


Summary:

The Barro Alto mineral resource is primarily saprolite overlain by laterites and extends for 35 km in an arc from southwest to northeast. The deposit is in the Barro Alto mafic-ultramafic complex, which is part of the Pre-Cambrian shield in the state of Goiás. The complex is composed of a sequence of serpentinised dunites and pyroxenites, enveloped by gabbros.

The mineralisation corresponds to the surficial weathered portions of the serpentinites. There are three types of saprolitic ore. The West type ore tends to have higher nickel grades and silica/magnesia ratios than the East type and Plain type ores.


Mining Methods

  • Truck & Shovel / Loader


Summary:

No blasting is required to access the relatively soft laterite/saprolite ore, which is loaded by a backhoe hydraulic excavators with a maximum working bench height of 2.5 m. These load a fleet of trucks, which transport the material to a ROM stockpile.


Crushing and Grinding


Processing

  • Calcining
  • Rotary kiln & Electric furnace

Source: Subscription required

Summary:

First metal from the Barro Alto ferronickel operation was produced on schedule in March 2011.

Conventional smelter-refinery technology is used to process the saprolite ore to produce ferro-nickel, which is a technology already used by Anglo American at its existing nickel operations.

At Barro Alto, ore is heated at very high temperatures in these two 185 metre rotary kilns in a process known as calcining, which removes moisture and water crystals from the nickel bearing ore and starts the 01 metallurgical process.

The project consists of an open pit mine and a ferronickel plant. The shallow pits forming the mine extend over an area 35 km long with a width of no more than 2 km. The plant uses a classical RKEF process to produce ferronickel.

The ore is dumped into a horizontal grizzly after which it goes through a three stage (primary, secondary, tertiary) process using two roll crushers followed by a Sandvik CH660 cone crusher, before conve ........

Recoveries & Grades:

CommodityParameter201920182017201620152014
Nickel Head Grade, % 1.691.711.711.761.781.81

Production:

CommodityUnits201920182017201620152014
Nickel t  ......  Subscription required  ......  Subscription required34,90035,50021,30028,300
All production numbers are expressed as metal in alloy.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017201620152014
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required2,630,700 t2,943,600 t2,510,400 t
Annual production capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required2,357,100 t1,472,800 t1,827,400 t
Subscription required - Subscription is required.

Reserves at December 31, 2019:

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven 16.7 Mt Nickel 1.39 % 232 kt
Probable 39.9 Mt Nickel 1.25 % 499 kt
Proven & Probable 56.6 Mt Nickel 1.29 % 731 kt
Measured & Indicated 6.3 Mt Nickel 1.21 % 76 kt
Measured & Indicated Laterite 4.1 Mt Nickel 1.21 % 49 kt
Inferred 16.3 Mt Nickel 1.27 % 206 kt
Inferred Laterite 4.7 Mt Nickel 1.2 % 56 kt

Financials:

Units201620152014
Revenue M USD  ......  Subscription required 46  
Earnings M USD  ......  Subscription required -21   -25  
EBITDA M USD  ......  Subscription required -14   -25  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 11, 2020
....................... Subscription required ....................... Subscription required Subscription required May 11, 2020
....................... Subscription required ....................... Subscription required Subscription required May 11, 2020
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2012

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
Annual Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Year-end Mineral Reserves 2016
Annual Report 2015
Year-end Mineral Reserves 2015
Corporate Presentation 2014
Other 2012
Other 2012
Press Release 2012
Subscription required - Subscription is required.

Aerial view:

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