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Brazil
Casa de Pedra Mine

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 Location:
3 km SW from Congonhas, Brazil

  Address:
PO Box: 97
Congonhas
Brazil
36415-000
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 TypeOpen Pit
Commodities
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Processing
  • Crush & Screen plant
  • Flotation
  • Magnetic separation
Mine Life2040


Owners

Source: p. 57, 109
CompanyInterestOwnership
Compania Siderurgica Nacional S.A. 87.52 % Indirect
Created in 2015 from the merger of the mining assets of CSN and Namisa, CSN Mineração S.A. is divided between CSN (87.52%) and a consortium of major Asian steelmakers (12.48%).
From November 30, 2015, the CSN Mineração S.A. has centralized mining operations of CSN, including the establishments of the mine Casa de Pedra. The participation of the CSN in this subsidiary is 87.52%.

Deposit Type

  • Banded iron formation


Summary:

Casa de Pedra mine is a hematite-rich iron deposit of an early proterozoic banded iron formation in Brazil’s Iron Ore Quadrangle (Quadrilátero Ferrífero).


Mining Methods

  • Truck & Shovel / Loader


Summary:

Casa de Pedra is an open pit mine located in the city of Congonhas, in the state of Minas Gerais, approximately 80 km south of the city of Belo Horizonte and 360 km north of the city of Rio de Janeiro.

Iron ore at Casa de Pedra is currently excavated by a fleet of hydraulic shovels and wheel loaders and then hauled by a fleet of trucks with an installed annual run of mine capacity of approximately 120 million tons.

The extraction of iron ore begins with the drilling of rocks. Explosives are then placed into the rocks for fragmentation.

Excavators and wheel loaders remove iron ore from Casa de Pedra and dump it onto off-road trucks, which transport the ore to the crushing facilities. Overburden removed is transported to special piles distributed across the mine.


Crushing and Grinding


Processing

  • Crush & Screen plant
  • Flotation
  • Magnetic separation

Source: Subscription required

Summary:

The iron ore is processed in treatment facilities, which have an installed capacity of 33 million tons of products per year (a sum of the central plant, mobile plants and Pires treatment facilities).

Casa de Pedra mine supplies all of iron ore needs, except pellets, and produces lump ore, sinter feed and pellet feed fines with high iron content.

Recoveries & Grades:

CommodityParameter20192018201720162015
Iron Ore Recovery Rate, %  ......  Subscription required  ......  Subscription required
Iron Ore Concentrate Grade, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Production:

CommodityUnits20192018201720162015
Iron Ore Mt  ......  Subscription required  ......  Subscription required262926
All production numbers are expressed as concentrate.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017
Annual mining capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Annual production capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2019:
The cutoff grade value for Casa de Pedra mine considered in the most recent audit is 23.37%.

CategoryTonnage CommodityGradeRecoverable Metal
Proven 856 Mt Iron 41.36 %
Probable 1,662 Mt Iron 41.36 %
Proven & Probable 2,518 Mt Iron 41.36 % 1,390 M tons

Commodity Production Costs:

CommodityUnits201920182017201620152014
Cash costs Iron Ore USD  ......  Subscription required  ......  Subscription required 15.8 / t 12.9 / t 15.6 / t 24.7 / t
Subscription required - Subscription is required.


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 4, 2020
....................... Subscription required ....................... Subscription required Subscription required Nov 4, 2020
....................... Subscription required ....................... Subscription required Subscription required Nov 4, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
Form 20-F 2017
Subscription required - Subscription is required.

Aerial view:

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