November 2016
Intermediate to advanced
378 pages
9h 43m
English
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8.3. Recovery and Utilization of Heavy Metals From Industrial Construction Waste Powder
8.3.1. Winnowing Enrichment of Zinc and Lead From Construction Waste Powder
The winnowing device includes a QUINCY screw air compressor (QGF30), a cylindrical gravity sedimentation chamber (6 × 1 m) and a Venturi tube (ZH15DS/L—10-12-12). Five sampling units (a, b, c, d, e) are evenly located in the chamber, which is demonstrated in Fig. 8.17.
The industrial construction waste polluted by lead and zinc were ball milled until the particle size was below 0.5 mm, and then sent to the winnowing device. The solid–gas ratio of the feed stream of the inlet C&D waste was set to less than 1/1000, and the flow rate was 438 m3/h. When the particle sedimentation was finished, ...
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