On the clean and efficient thermal treatment of de-inking solid residues

被引:15
作者
Kozinski, JA
Zheng, GH
Saade, R
DiLalla, S
机构
[1] McGill University, McGill Metals Processing Centre, Department of Mining, Montreal, Que., H3A 2A7
关键词
de-inking residues; combustion; ash; heavy metals; aromatic hydrocarbons;
D O I
10.1002/cjce.5450750118
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Thermal treatment of contaminated de-inking sludge in a low-high-low (LHL) temperature reactor was investigated. Experiments were conducted in a Cahn TGA-171 furnace coupled with a Mattson Galaxy 5020 FTIR. Sludge samples (70 g) were heated up to 1770 K (50 K/min.), kept at that temperature for 5 min. and were then quenched (60 K/min.). During the LHL process the sludge underwent structural transformations from a mixture of fibers, through skeleton-like structures (45-110 mu m), porous particles, to compact spheres (5-30 Gun). It was shown that the LHL treatment results in a safe encapsulation of heavy metals (Pb, Cd) inside the ash and in a 78.2% decrease in the amount of mutagenic polycyclic aromatic hydrocarbons. The LHL method developed could help to solve waste management and environmental protection problems.
引用
收藏
页码:113 / 120
页数:8
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