Division BAT 162
United Kingdom
In order to reduce the quantities of filter dust and sludge sent for disposal, BAT is to organise operations on site so as to facilitate filter dust and sludge reuse or, failing that, filter dust and sludge recycling, including one or a combination of the techniques given below.
| Highly contaminated dusts and sludges cannot be reused or recycled. Reuse and recycling might also be limited by accumulation problems (e.g. reusing dust from FeCr production might lead to Zn accumulation in the furnace). | ||
| Technique | Applicabilityf1 | |
|---|---|---|
| a | Use of filter dust in the smelting process | Only applicable to filter dust from FeCr and FeMo production |
| b | Use of filter dust in stainless steel production | Only applicable to filter dust from crushing and screening operations in high-carbon FeCr production |
| c | Use of filter dust and sludge as a concentrate feed | Only applicable to filter dust and sludge from the off-gas cleaning in Mo roasting |
| d | Use of filter dust in other industries | Only applicable to FeMn, SiMn, FeNi, FeMo and FeV production |
| e | Use of micro-silica as an additive in the cement industry | Only applicable to micro-silica from FeSi and Si production |
| f | Use of filter dust and sludge in the zinc industry | Only applicable to furnace dust and wet scrubber sludge from the alloy recovery from steel mill residues |
Annotations
Footnotes
- f1
-
Highly contaminated dusts and sludges cannot be reused or recycled. Reuse and recycling might also be limited by accumulation problems (e.g. reusing dust from FeCr production might lead to Zn accumulation in the furnace).