Division 38

United Kingdom

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

Technique^f1	Applicability
A description of the techniques is given in Sections 1.10.5 and 1.10.7.
(i) Reduction of the volatile components by raw material modifications. The formulation of the batch composition may contain very volatile components (e.g. boron, fluorides) which significantly contribute to the formation of dust emissions from the melting furnace	The technique is generally applicable within the constraints of the type of glass produced and the availability of substitute raw materials
(ii) Electric melting	Not applicable for large volume glass productions (> 300 tonnes/day). Not applicable for productions requiring large pull variations The implementation requires a complete furnace rebuild
(iii) Oxy-fuel melting	The maximum environmental benefits are achieved for applications made at the time of a complete furnace rebuild
(iv) Filtration system: electrostatic precipitator or bag filter	The techniques are generally applicable
(v) Wet scrubbing system	The applicability is limited to specific cases, in particular to electric melting furnaces, where flue-gas volumes and dust emissions are generally low and related to carryover of the batch formulation

Table 28

BAT-AELs for dust emissions from the melting furnace in the domestic glass sector

Parameter	BAT-AEL
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.
Considerations concerning the economic viability for achieving the BAT-AELs in the case of furnaces with a capacity of < 80 t/d, producing soda-lime glass, are reported.
This BAT-AEL applies to batch formulations containing significant amounts of constituents meeting the criteria as dangerous substances, in accordance with Regulation (EC) No 1272/2008 of the European Parliament and of the Council.
Parameter	mg/Nm³	kg/tonne melted glass^f2
Dust	< 10 – 20^f3	< 0,03 – 0,06
Dust	< 1 – 10^f4	< 0,003 – 0,03

Annotations

f1: A description of the techniques is given in Sections 1.10.5 and 1.10.7.
f2: 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.
f3: Considerations concerning the economic viability for achieving the BAT-AELs in the case of furnaces with a capacity of < 80 t/d, producing soda-lime glass, are reported.
f4: This BAT-AEL applies to batch formulations containing significant amounts of constituents meeting the criteria as dangerous substances, in accordance with Regulation (EC) No 1272/2008 of the European Parliament and of the Council.