Division 43

United Kingdom

BAT is to reduce metal emissions from the melting furnace by using one or a combination of the following techniques:

Technique^f1	Applicability
A description of the techniques is given in Section 1.10.5.
(i) Selection of raw materials for the batch formulation with a low content of metals	The applicability may be limited by the constraints imposed by the type of glass produced at the installation and the availability of raw materials
(ii) Minimising the use of metal compounds in the batch formulation, through a suitable selection of the raw materials where colouring and decolourising of glass is needed or where specific characteristics are conferred to the glass	For the production of crystal and lead crystal glasses the minimisation of metal compounds in the batch formulation is restricted by the limits defined in Directive 69/493/EEC which classifies the chemical composition of the final glass products.
(iii) Dry or semi-dry scrubbing, in combination with a filtration system	The technique is generally applicable

Table 33

BAT-AELs for metal emissions from the melting furnace in the domestic glass sector with the exception of glasses where selenium is used for decolourising

Parameter	BAT-AEL^f2
The levels refer to the sum of metals present in the flue-gases in both solid and gaseous phases.
A conversion factor of 3 × 10^–3 has been applied (see Table 2). However, a case-by-case conversion factor may have to be applied for specific productions.
Parameter	mg/Nm³	kg/tonne melted glass^f3
Σ (As, Co, Ni, Cd, Se, Cr_VI)	< 0,2 – 1	< 0,6 – 3 × 10^–3
Σ (As, Co, Ni, Cd, Se, Cr_VI, Sb, Pb, Cr_III, Cu, Mn, V, Sn)	< 1 – 5	< 3 – 15 × 10^–3

Annotations

Footnotes

f1: A description of the techniques is given in Section 1.10.5.
f2: The levels refer to the sum of metals present in the flue-gases in both solid and gaseous phases.
f3: A conversion factor of 3 × 10^–3 has been applied (see Table 2). However, a case-by-case conversion factor may have to be applied for specific productions.