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Show • Increasing the kiln temperature to 927°C (1700°F) caused the average size distribution to shift to about 60 percent less than 10 ~m for all test metals except chromium. The total particulate sample distribution shifted to about 30 percent less than 10 ~m for these same tests. The test data suggest that increased kiln temperature over this range concentrated the flue gas particulate metals in the finer size fractions. • Individual metal enrichment in finer particulate fractions correlated with relative metal volatilities, with the volatile metals becoming more enriched in the finer particulate. This is consistent with the volatilization/condensation mechanism of metal enrichment in fine particulate. The addition of chlorinated compounds to the waste feed mainly affected cadmium, chromium, copper and lead distributions. For cadmium, copper, and lead, an increase in waste feed chlorine content from 0 to 4 percent caused the distributions to shift from roughly 20 percent to about 55 percent less than 10 ~m. No further effects with feed chlorine increased to 8 percent were observed for these metals. For chromium, increasing chlorine content from 0 to 4 to 8 percent caused a corresponding shift of 2 to 20 to 50 percent in particulate of less than 10 ~m. Over the same range of chlorine concentrations, the fraction of total particulate in the less than 10 ~m size fraction increased from 20 to about 35 percent. Thus, the test data indicate that chlorine in the waste feed concentrated the flue gas particulate cadmium, chromium, copper and lead in the finer particulate size fractions. REFERENCES 1. Federal Register, Vol. 55, No. 82, April 27, 1990. 2. Fournier, Jr., D.J. and L.R. Waterland. "pilot-Scale Evaluation of the Fate of Trace Metals in a Rotary Kiln Incinerator with an Ionizing wet Scrubber." Acurex draft report prepared under EPA Contract 68-C9-0038, April 1990. 3. Fournier, Jr., D.J., W.E. Whitworth and L.R. Waterland. "pilot-Scale Evaluation of the Fate of Trace Metals in a Rotary Kiln Incinerator with a Venturi/Packed Column Scrubber." Acurex draft report prepared under EPA Contract 68-03-3267, October 1989. 4. Barton, R.G., W.O. Clark and W.R. Seeker. "Fate of Metals in Waste Combustion Systems." Presented at the First 17 |