# Commission Implementing Decision of 26 March 2013 establishing the best available techniques (BAT) conclusions under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions for the production of cement, lime and magnesium oxide (notified under document C(2013) 1728) (Text with EEA relevance) (2013/163/EU), Division 19

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

In order to reduce the emissions of NOx from the flue-gases of kiln firing and/or preheating/precalcining processes, BAT is to use one or a combination of the following techniques:
A description of the techniques is provided in Section 1.5.2.
Technique
Applicability
a
Primary techniques
I.
Flame cooling
Applicable to all types of kilns used for cement manufacturing. The degree of applicability can be limited by product quality requirements and potential impacts on process stability
II.
Low NOx burners
Applicable to all rotary kilns, in the main kiln as well as in the precalciner
III.
Mid-kiln firing
Generally applicable to long rotary kilns
IV.
Addition of mineralisers to improve the burnability of the raw meal (mineralised clinker)
Generally applicable to rotary kilns subject to final product quality requirements
V.
Process optimisation
Generally applicable to all kilns
b
Staged combustion (conventional or waste fuels), also in combination with a precalciner and the use of optimised fuel mix
In general, can only be applied in kilns equipped with a precalciner. Substantial plant modifications are necessary in cyclone preheater systems without a precalciner.
In kilns without precalciner, lump fuels firing might have a positive effect on NOx reduction depending on the ability to produce a controlled reduction atmosphere and to control the related CO emissions
c
Selective non-catalytic reduction (SNCR)
In principle, applicable to rotary cement kilns. The injection zones vary with the type of kiln process. In long wet and long dry process kilns it may be difficult to obtain the right temperature and retention time needed. See also BAT 20
d
Selective catalytic reduction (SCR)
Applicability is subject to appropriate catalyst and process development in the cement industry

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Source: https://www.legislation.gov.uk/eudn/2013/163/annex/division/5/division/1.2/division/1.2.6/division/1.2.6.1/division/19 (the official version)
Page: https://openlegislation.uk/eu-decision-2013-163/annex/division-5/division-1.2/division-1.2.6/division-1.2.6.1/division-19
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.