Page 521 - Materials Chemistry, Second Edition
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CAT3525_C15.qxd  1/27/2005  12:40 PM  Page 492
                       492                       Waste Management Practices: Municipal, Hazardous, and Industrial























































                       FIGURE 15.9 Mechanical feeding of containerized hazardous wastes into a kiln.


                       EXAMPLE 15.2
                       Determine the waste retention time for a rotary kiln operating at 0.9 r/min with a kiln length of 5 m,
                       a diameter of 2.2 m, and a slope of 0.1 m/m.

                       SOLUTION

                          θ   0.19L/(NDS)
                          θ   0.19   5/(0.9   2.2   0.1)
                          θ   4.8 min
                       If the desired retention time is actually to be 7.5 min, what should the rotational velocity be adjusted to?
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