Publication Date:
2015-12-22
Description:
This paper reports a study on the reasons for filter bag failure at steel plants and suitable approach to overcome such problems is proposed. Clean and used filter bags were subjected to evaluate tensile and bursting strengths and air permeability properties. In order to simulate behavior of the filter bags under acidic conditions normally encountered in actual working environment, acid dew point test was conducted on the clean bags. The structural changes in all bags (clean, used and chemically treated) were analyzed under Scanning Electron Microscope (SEM). A significant reduction in tensile and bursting strengths was observed after acidic treatment with H 2 SO 4. One of the major reasons for the filter bag failure was attributed to poor acidic resistance of the bags. SEM images of the bags showed perceptible degradation of the fibers due to acidic treatments and also clogging of the filter bags with dust particles. In order to improve the life of the bags, these bags were coated with a mixture of acrylic binder (7% by weight) and nanoclay (2% by weight). Furthermore, filter fabrics were also produced from the spunlaced process and coated with the binder and nanoclay coatings for comparison with the commercial product. The results showed that commercial filters bags, as well as developed samples, showed improved resistance without any failure behavior.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
