Sustainability Topic: Energy

302–1  Energy consumption within the organization

Energy consumption in 2019 totaled 18.9 (19.7) million gigajoules (GJ). Electricity accounts for 16.1 (16.2) million GJ of this consumption, which equates to 4.5 (4.5) TWh.

The reported energy usage is based on invoiced incoming and outgoing deliveries, supplemented by internal measurements and stock inventories at the end of the year. Conversions between weight and energy have been performed using energy values specified by the supplier or by using tabled values provided by national bodies.

Coke, coal, oil, and fuel gases are used for the reduction and smelting of copper, lead and zinc concentrates. Diesel is used for transportation purposes, in mining operations, and for internal transportation. Limited amounts of heating oil and gas are used for heating purposes during the cold season. The use of biofuels in metallurgical processes has been tested and evaluated. A boiler based on biomass has been added during the reporting period. Bio-based fuels have also, to a limited extent, been used in road transports. Electricity is the dominant source of indirect energy in the Group.

Energy consumption within the organization (GJ)

2017

2018

2019

       

Direct energy

     

Coal & coke

1,844,000

2,053,000

1,814,000

Gas

289,000

306,000

306,000

Oil

2,128,000

2,285,000

2,000,000

Diesel & petrol

1,611,000

1,666,000

1,568,000

Wood chips

36,000

49,000

67,000

Total direct energy

5,908,000

6,359,000

5,754,000

   Whereof renewables 1)

51,000

69,000

89,000

   Produced energy,
   for internal use

2,291,000

2,335,000

4,700,000

Indirect energy

     

Electricity, purchased

16,524,000

16,156,000

16,055,000

Heat, purchased

501,000

1,100,000

128,000

Total indirect energy

17,025,000

17,256,000

16,183,000

Total energy input

22,934,000

23,614,000

21,937,000

       

Produced energy, sold

3,146,000

3,964,000

3,054,000

Total energy ­consumption

19,788,000

19,650,000

18,884,000

1) Wood chips and biodiesel

302–3  Energy intensity

Boliden’s energy intensity was 13.21 (13.03) GJ/metric ton metal, an ­increase from the previous year. The energy intensity ratio is reported as the product intensity (energy consumed per unit produced). It is calculated as Boliden’s net total energy consumption (the same as in GRI 302-1) for all Boliden sites, divided by the production output in metal metric tons from Boliden’s production sites. This indicator is affected both by process efficiency and by the product mix and raw material properties.

Energy intensity

GJ/t metal


Data for 2017 has been adjusted due to updated production data.

302–4  Reduction of energy consumption

Boliden has chosen, due to the different character of mining and smelting operations, to work with local energy targets, rather than Group targets. Boliden’s operations decreased their energy usage by 766,000 GJ during the year.

Boliden’s smelting operations strive to take advantage of excess heat from the processes, either transforming it to electric power or supplying it for use in external district heating. In 2019, 4,700,000 (2,335,000) GJ of heat was used internally, and 3,054,000 (3,964,000) GJ was delivered externally for use in district heating systems.

To drive improvements, an energy network was established in 2019 in order to exchange experience on energy efficiency projects between the sites.