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Dannemora mine

Dannemora has a long tradition of producing high-quality ore. When the mine is brought back into operation, our goal is for it to become one of the EU’s leading producers of high-quality iron ore concentrate, tailored for the production of CO2-free steel. The mine’s production will be carried out through a primarily electrified process, and we aim to minimize the CO2 footprint from both production and logistics.

Information about the operation

Location
Dannemora, Uppland, Sweden

Type
Underground mine

Mineral
Magnetite

Status
Holds processing concession, land allocation, and environmental permits. Feasibility study to be published in June 2024

Planned annual production
1.1 million tonnes of magnetite concentrate with a 68% Fe grade

Estimated life of mine
11 years

History

The Dannemora mines in Uppland have a documented history of extraction dating back to the 15th century, continuing until 2015. The primary mineral extracted from the mine has always been iron ore. The town of Dannemora is located in the municipality of Östhammar, approximately 45 kilometers northeast of Uppsala.

Throughout its long history, Dannemora has had several owners. In modern times, the mine was owned by SSAB from 1978 to 1992. When the mine was restarted in 2012, it was under the management of Dannemora Mineral AB. On June 13, 2012, the mine was officially reopened by Carl XVI Gustaf. The company went bankrupt in 2015, and the bankruptcy estate was purchased in 2016. Today, the mine is operated by Dannemora Iron AB, a subsidiary of GRANGEX.

Mineral resource estimate

The mineral resource estimate presented in the table has been included in a detailed mine planning process. Here, expected or actual modifying factors have been accounted for, including waste inclusions (dilution) and planned and operational ore losses. The tonnage indicated is therefore considered a probable ore reserve.

The main differences between the mineral resource estimates for 2022 and 2024 are new analyses that have filled in gaps regarding specified iron grades, which were previously set to 0%. The stockpiles of beneficiation sand that were previously stored underground have been reclassified from assumed to indicated, and new information (2024) has been added regarding previous mining in the ore body Upper Konstäng, where a significant portion of its tonnage was removed. More information can be found in the JORC table1, July 10, 2024 (Technical reports below). The table provides a summary of the mineral resources for the Dannemora mine as of April 5, 2024, compared to August 8, 2022.

Category 2024 2022
Tonnes (Mt) Fe%. Mn%. S% Tons (Mt) Fe%. Mn%. S%
Measures 17.3 37.19 1.92 0.27 17.3 37.49 1.9 0.25
indicated 11.6 34.74 2.35 0.27 11.9 34.66 2.2 0.27
Sub-Total 28.9 36.21 2.09 0.27 29.2 36.34 2.02 0.26
indicated 2.2 21 2.5 0.19 3 22.5 2.5 0.19
Total measured + indicated 31.2 35.14 2.12 0.26 32.2 35.05 2.07 0.25
Inferred (in situ) 5.7 34.16 2.32 0.13 5.9 33.33 2.27 0.15

Mineral Reserves Dannemora

The tailings included in the ore reserve estimate is based on tailings that has previously been used as backfill in several mining chambers in the Konstäng and Kruthus ores south of the Dannemora mine. The estimate of mineral reserves follows the principles outlined in JORC-2012 (Technical reports below).

All ore bodies Tonnes after dilution (Mt) Diluted Fe content (weight-%) Mn content (weight-%) S-class (weight-%)
Total 30.9 30.62 1.75 0.21

Technical reports

Download and read the summaries of the studies below.