Division BAT 99

United Kingdom

In order to reduce PCDD/F emissions to air from the smelting of secondary lead and/or tin raw materials, BAT is to use one or a combination of the techniques given below.

Technique
Descriptions of the techniques are given in Section 1.10.
a	Select and feed the raw materials according to the furnace and the abatement techniques used^f1
b	Use charging systems, for a semi-closed furnace, to give small additions of raw material
c	Internal burner system for melting furnaces
d	Afterburner or regenerative thermal oxidiser
e	Avoid exhaust systems with a high dust build-up at temperatures > 250 °C
f	Rapid quenching
g	Injection of adsorption agent in combination with efficient dust collection system
h	Use of efficient dust collection system
i	Use of oxygen injection in the upper zone of the furnace
j	Optimise combustion conditions to reduce the emissions of organic compounds

BAT-associated emission levels: See Table 27.

Table 27

BAT-associated emission levels for PCDD/F emissions to air from the smelting of secondary lead and/or tin raw materials

Parameter	BAT-AEL (ng I-TEQ/Nm³)^f2
As an average over a sampling period of at least six hours.
PCDD/F	≤ 0,1

Annotations

Footnotes

f1: Descriptions of the techniques are given in Section 1.10.
f2: As an average over a sampling period of at least six hours.