Division 58
United Kingdom
When nitrates are used in the batch formulation for glass wool production, BAT is to reduce NOX emissions by using one or a combination of the following techniques:
| A description of the techniques is given in Section 1.10.2. | |
| Techniquef1 | Applicability |
|---|---|
| (i) Minimising the use of nitrates in the batch formulation The use of nitrates is applied as an oxidising agent in batch formulations with high levels of external cullet to compensate for the presence of organic material contained in the cullet | The technique is generally applicable within the constraints of the quality requirements for the final product |
| (ii) Electric melting | The technique is generally applicable. The implementation of electric melting requires a complete furnace rebuild |
| (iii) Oxy-fuel melting | The technique is generally applicable. The maximum environmental benefits are achieved for applications made at the time of a complete furnace rebuild |
Table 48
BAT-AELs for NOX emissions from the melting furnace in glass wool production when nitrates are used in the batch formulation
| The conversion factor of 2 × 10–3 has been used (see Table 2). | |||
| The lower levels of the ranges are associated with the application of oxy-fuel melting. | |||
| Parameter | BAT | BAT-AEL | |
|---|---|---|---|
| mg/Nm3 | kg/tonne melted glassf2 | ||
| NOX expressed as NO2 | Minimisation of nitrate input in the batch formulation, combined with primary techniques | < 500 – 700 | < 1,0 – 1,4f3 |
Annotations
Footnotes
- f1
-
A description of the techniques is given in Section 1.10.2.
- f2
-
The conversion factor of 2 × 10–3 has been used (see Table 2).
- f3
-
The lower levels of the ranges are associated with the application of oxy-fuel melting.