Division BAT 11
United Kingdom
In order to reduce mercury emissions to air (other than those that are routed to the sulphuric acid plant) from a pyrometallurgical process, BAT is to use one or both of the techniques given below.
| Descriptions of the techniques are given in Section 1.10. | |
| Technique | |
|---|---|
| a | Use raw materials with a low mercury content, including by cooperating with providers in order to remove mercury from secondary materials. |
| b | Use adsorbents (e.g. activated carbon, selenium) in combination with dust filtrationf1 |
BAT-associated emission levels: See Table 1.
Table 1
BAT-associated emission levels for mercury emissions to air (other than those that are routed to the sulphuric acid plant) from a pyrometallurgical process using raw materials containing mercury
| As a daily average or as an average over the sampling period. | |
| The lower end of the range is associated with the use of adsorbents (e.g. activated carbon, selenium) in combination with dust filtration, except for processes using Waelz kilns. | |
| Parameter | BAT-AEL (mg/Nm3)f2 f3 |
|---|---|
| Mercury and its compounds, expressed as Hg | 0,01-0,05 |
Annotations
Footnotes
- f1
-
Descriptions of the techniques are given in Section 1.10.
- f2
-
As a daily average or as an average over the sampling period.
- f3
-
The lower end of the range is associated with the use of adsorbents (e.g. activated carbon, selenium) in combination with dust filtration, except for processes using Waelz kilns.