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