Division 62

United Kingdom

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

A description of the techniques is given in Section 1.10.5.
Technique^f1	Applicability
(i) Selection of raw materials for the batch formulation with a low content of metals	The technique is generally applicable within the constraints of the availability of raw materials. In glass wool production, the use of manganese in the batch formulation as an oxidising agent depends on the quantity and quality of external cullet employed in the batch formulation and may be minimised accordingly
(ii) Application of a filtration system	Electrostatic precipitators are not applicable to cupola furnaces for stone wool production (see BAT 56)

A description of the techniques is given in Section 1.10.5.

Technique^f1

Applicability

(i)

Selection of raw materials for the batch formulation with a low content of metals

The technique is generally applicable within the constraints of the availability of raw materials.

In glass wool production, the use of manganese in the batch formulation as an oxidising agent depends on the quantity and quality of external cullet employed in the batch formulation and may be minimised accordingly

(ii)

Application of a filtration system

Electrostatic precipitators are not applicable to cupola furnaces for stone wool production (see BAT 56)

Table 52

BAT-AELs for metal emissions from the melting furnace in the mineral wool sector

Parameter	BAT-AEL^f2
The ranges refer to the sum of metals present in the flue-gases in both solid and gaseous phases.
The conversion factors of 2 × 10^–3 and 2,5 × 10^–3 have been used for the determination of the lower and upper values of the BAT-AELs range (see Table 2).
Higher values are associated with the use of cupola furnaces for the production of stone wool.
Parameter	mg/Nm³	kg/tonne melted glass^f3
Σ (As, Co, Ni, Cd, Se, Cr_VI)	< 0,2 – 1^f4	< 0,4 – 2,5 × 10^–3
Σ (As, Co, Ni, Cd, Se, Cr_VI, Sb, Pb, Cr_III, Cu, Mn, V, Sn)	< 1 – 2	< 2 – 5 × 10^–3

Annotations

Footnotes

f1: A description of the techniques is given in Section 1.10.5.
f2: The ranges refer to the sum of metals present in the flue-gases in both solid and gaseous phases.
f3: The conversion factors of 2 × 10^–3 and 2,5 × 10^–3 have been used for the determination of the lower and upper values of the BAT-AELs range (see Table 2).
f4: Higher values are associated with the use of cupola furnaces for the production of stone wool.