Material Topic: Materials

301–1  Materials used by weight or volume

Levels of mined rock, milled ore, concentrate, and smelting ­materials production and usage were all similar in 2018 to those posted in previous years. Boliden has included tonnage of rock, ore and concentrates in the material used in its reporting. Other materials specified in the table include waste rock from a mine that is not part of the Boliden Group, which is used as backfill material in Boliden mines. Some of the concentrate produced in the mines is sold to external parties. The total smelting material feed comprises concentrates both from Boliden’s own mines and from external mines, purchased secondary materials, and secondary materials sent from one smelter to another.

Materials are mostly weighed in connection with loading and/or charging (ore, concentrates, and most smelting materials). The mined rock figure is based on calculations (waste rock and ore). A minor part of input materials is calculated from input and stock.

Materials used by weight, (ktonnes)

2016

2017

2018

       

Mined rock

100,765

110,256

112,392

Whereof milled ore

49,000

55,000

54,000

Whereof concentrate produced

1,249

1,388

1,361

Smelting materials1)

2,676

2,656

2,742

Other materials

786

1,174

1,077

Whereof non-renewables

150

154

162

1) Adjusted calculations.

301–2  Recycled input materials used

Boliden uses its own and other companies’ by-products and residues for the extraction and recycling of metals. The Boliden Rönnskär smelter began using a new electronic scrap recycling facility in 2012, making Boliden among the world leaders in e-scrap recycling. Boliden Bergsöe, which recycles about 70,000 tonnes of lead acid batteries and 4,000 tonnes other lead scrap per year, is, furthermore, the only secondary lead smelter in the Nordic region.

Metals can be recycled endlessly without any deterioration in their quality and it is important that electronic materials and scrap, such as telephone cables, copper roofs and copper pipes, from the demolition or construction of buildings and infrastructure is re-utilized to as high a degree as possible. The Rönnskär smelter produces 36% (38) of the gold, 26% (27) of the copper, 23% (28) of the silver, and 82% (84) of the zinc from secondary raw materials.

The recycling input rate (RIR) shows the fraction of secondary materials in the total input to Boliden Smelters. Recycled materials include secondary materials from external sources and secondary materials sent from one plant to another within the Group. By-products and non-product outputs recirculated internally at the sites and slag sent from smelters to mines are not included.

Percentage of recycled materials (tonnes)

2016

2017

2018

       

Total secondary feed1)

333,600

341,800

348,500

Total feed1) (primary and secondary)

2,676,000

2,656,000

2,742,000

Recycling rate

12%

13%

13%

1) Adjusted calculations.