By M. Meltzer
Analyzes possible choices to land disposal of harmful steel waste streams, targeting tips on how to hinder waste new release. resource aid, recycling and remedy concepts are lined.
Read Online or Download Metal Bearing Waste Streams: Minimizing, Recycling and Treatment (Pollution Technology Review) (No 196) PDF
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Extra info for Metal Bearing Waste Streams: Minimizing, Recycling and Treatment (Pollution Technology Review) (No 196)
However, the use of warm (14o-15(fF) air for drying is less costly than the expense associated with solvent usage and disposal, and there are additives available to prevent short term rusting. Another possibility is to use a hot water rinse (approximately 180°F) for cleaning, containing a nitrite-based alkaline rust inhibitor. At this temperature, parts will dry quickly. The rust inhibitor will leave a protective film that will reduce corrosion. The simplest aqueous cleaner is water, which can be used in conjunction with mechanical scrubbing or agitation.
Segregate cleaning wastes. 5. Maximize recycling and reuse. 34 Waste Management in Metal Cleaning and Stripping 35 This strategy is consistent with the multi-media approach and general emphasis of reducing the waste at the source. Each step is discussed in the following sections. In many instances, by controlling the factors that contribute to surface contamination of the parts, the need for cleaning can be reduced or eliminated altogether. Control of parts contamination starts with a study of contamination sources.
This method is commonly used in the steel industry where they require a higher grade scrap to be used. While this method is effective, the ability to obtain a steady supply of high grade scrap varies considerably and the economics usually favor a different solution (Stephens 1988). 2 Alter Desulfurization Agent To eliminate the use of calcium carbide, several major foundries have investigated the use of alternative desulfurization agents (Stephens 1988). One proprietary process employs calcium oxide, calcium fluoride, and two other materials.