Community Research and Development Information Service - CORDIS

Abstract

Sinter plants are important to the economics of integrated steelmaking and offer a route for recycling revert materials. They also account for a substantial proportion of the airborne pollutants from an iron and steel works, and are under increasing pressure for improved abatement of emissions. Bag filters offer efficient dust removal compared with electrostatic precipitators but have limitations imposed by the properties of economic fabrics. The advent of a technology, embodied in the KM filter, in which metallic filter screens of relatively large mesh size are used instead of fabric bags offered a potential method of achieving bag filter performance whilst avoiding fabric-related problems. In this device a cake of collected dust acts as the filtration medium.
Following characterisation of the fume in industrial sinter plants, a specially designed KN filter has been tested at small pilot scale (~ 1m{3}/s) on a side stream from the wind main of a UK sinter strand. Pressure drop and filtration performance were approximately equivalent to a fabric filter, with outlet dust loadings of ~5mg/m{3}. A filtration velocity of 2.3m/min was achieved, which is superior to expectations for a fabric filter.
Attempts to test filter meshes on a sinter box and on wind main gas from a Spanish sinter plant were inconclusive, but some encouraging results were obtained.
The filter operated without problem during a cold start of the sinter strand, despite high levels of condensation which would have caused problems with fabric bags.
performance in abatement of heavy metals and radioactive species was considerably superior to that of an electrostatic precipitator, and injection of carbonaceous sorbents enabled substantial capture of PCDD/Fs, PAHs and PCBs.
Cost of full scale units should be similar to those of fabric filters.

Additional information

Authors: BRIGGS A M W, CORUS, Rotherham (GB);GARCIA CARCEDO F, CENIM, Madrid (ES);VEGA SEDENO J, CSI-Planos, Aviles (ES);ESTRELA M A, ISQ, Oeiras (PL)
Bibliographic Reference: EUR 21146 EN (2004), 166 pp. Euro: 25
Availability: EUR-OP reference: KI-NA-21146-EN-S Available from EUR-OP sales agents URL: http://publications.eu/general/en/publications_en.htm
ISBN: ISBN: 92-894-8110-2
Record Number: 200417709 / Last updated on: 2004-09-30
Category: PUBLICATION
Original language: en
Available languages: en