# 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 51: In order to reduce dust emissions to air from the combustion of iron and steel process gases, BAT is to use one or a combination of the techniques given below.

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

Technique
Description
Applicability
a.
Fuel choice/management
Use of a combination of process gases and auxiliary fuels with a low averaged dust or ash content
Generally applicable within the constraints associated with the availability of different types of fuel
b.
Blast furnace gas pretreatment at the iron- and steel-works
Use of one or a combination of dry dedusting devices (e.g. deflectors, dust catchers, cyclones, electrostatic precipitators) and/or subsequent dust abatement (venturi scrubbers, hurdle-type scrubbers, annular gap scrubbers, wet electrostatic precipitators, disintegrators)
Only applicable if blast furnace gas is combusted
c.
Basic oxygen furnace gas pretreatment at the iron- and steel-works
Use of dry (e.g. ESP or bag filter) or wet (e.g. wet ESP or scrubber) dedusting. Further descriptions are given in the Iron and Steel BREF
Only applicable if basic oxygen furnace gas is combusted
d.
Electrostatic precipitator (ESP)
See descriptions in Section 8.5
Only applicable to combustion plants combusting a significant proportion of auxiliary fuels with a high ash content
e.
Bag filter
Table 31
BAT-associated emission levels (BAT-AELs) for dust emissions to air from the combustion of 100 % iron and steel process gases
For existing plants operated < 1 500 h/yr, these BAT-AELs do not apply.
For existing plants operated < 500 h/yr, these levels are indicative
Type of combustion plant
BAT-AELs for dust (mg/Nm3)
Yearly average
Daily average or average over the sampling period
New or existing boiler
2–7
2–10
New or existing CCGT
2–5
2–5

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/4/division/4.2/division/4.2.4/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-4/division-4.2/division-4.2.4/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.