# Commission Implementing Decision (EU) 2017/1442 of 31 July 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for large combustion plants (notified under document C(2017) 5225) (Text with EEA relevance), Division BAT 47: In order to prevent or reduce NOX emissions to air from the combustion of iron and steel process gases in boilers, BAT is to use one or a combination of the techniques given below.

Extent: E+W+S+N.I.

Technique
Description
Applicability
a.
Low-NOX burners (LNB)
See description in Section 8.3.
Specially designed low-NOX burners in multiple rows per type of fuel or including specific features for multi-fuel firing (e.g. multiple dedicated nozzles for burning different fuels, or including fuels premixing)
Generally applicable
b.
Air staging
See descriptions in Section 8.3
c.
Fuel staging
d.
Flue-gas recirculation
e.
Process gas management system
See description in Section 8.2.
Generally applicable within the constraints associated with the availability of different types of fuel
f.
Advanced control system
See description in Section 8.3.
This technique is used in combination with other techniques
The applicability to old combustion plants may be constrained by the need to retrofit the combustion system and/or control command system
g.
Selective non-catalytic reduction (SNCR)
See descriptions in Section 8.3
Not applicable to combustion plants operated < 500 h/yr
h.
Selective catalytic reduction (SCR)
Not applicable to combustion plants operated < 500 h/yr.
Not generally applicable to combustion plants of < 100 MWth.
Retrofitting existing combustion plants may be constrained by the availability of sufficient space and by the combustion plant configuration

---
Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/4/division/4.2/division/4.2.2/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-4/division-4.2/division-4.2.2/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.