Environmental Engineering Reference
In-Depth Information
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ZĞƵƐĂĎŮĞ
ĐŽŴƉŽŶĞŶƚ
ZĞƵƐĞĚĐŽŴƉŽŶĞŶƚƐ
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^ŽƋƟŶŐ
ŜƐŴĂŶƚŮŜŶŐ
ZĞƋƵŜƋĞĚƐĞŮĞĐƟǀĞ
ƚƋĞĂƚŴĞŶƚ
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ŽŴƉŽŶĞŶƚ
ZĞĐLJĐŮŜŶŐ
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Ğ͘Ő͘DŽƚŽƋ͕ŽŴƉƋĞƐƐŽƋ͕
ŽŴƉŽŶĞŶƚƐŜŶĐŮƵĚŜŶŐŴŜŶŽƋŴĞƚĂŮƐ
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DĂƚĞƋŜĂŮ
ƋĞĐLJĐŮŜŶŐ
WƋŽĐĞƐƐŜŶŐ
DĂƚĞƋŜĂŮƐ;ƐĞƉĂƋĂƚĞĚͿ
ZĞĐLJĐŮĞĚŴĂƚĞƋŜĂŮƐ
Ğ͘Ő͘ŚĞŴŜĐĂŮ͕DŚĞƋŴĂŮ͕
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ŶĞƋŐLJZĞĐŽǀĞƋLJ
ZĞƐŜĚƵĞ
>ĂŶĚĮŮŮ
EŽƋŴĂŮŴĞƚĂŮƋĞĐLJĐŮĞ
ĚǀĂŶĐĞĚŴĞƚĂŮƋĞĐLJĐŮĞ
&ŽĐƵƐŜŶŐDŜŶŽƋŴĞƚĂŮƐĂŶĚ,ĂƋŴĨƵŮĐŽŴƉŽŶĞŶƚƐ
Fig. 13.10
Whole flow diagram for the processing of E-scrap
scrap, respectively. Establishment of an effective collection system is an essential
prerequisite for developing urban mining economically.
A whole flow diagram for the processing of E-scrap is shown in Fig.
13.10
. This
shows the flow of E-scrap after collecting and the main pretreatment stage for E-
scrap where WEEE are dismantled and crushed to various parts in the first step
after collection. There are many methods for dismantling such as hand-picking, and
crushing or shredding. Sorting techniques are applied to separate materials like iron
& steels, non-ferrous alloys like aluminum and copper, and plastics. These sorting
techniques include gravity separation, magnetic separation and so on, which are
mainly used in the old mineral processing industry. Metallurgical production, with
its intrinsic potential in smelting, extraction, enrichment and separation methods,
related technology and process flow sheets, each with their own selectivity and
yield, plays an important role in the context of minor rare metals.
The integrated iron & steel industry is relatively straightforward: starting with
iron ore mining, ore sintering and/or pelletizing, production of metallurgical coke,
quarrying of limestone, it continues with a fixed sequence involving blast furnaces,
convertors, hot and often cold rolling. Nonferrous metal industry is much more
diversified than steel production. Almost all plant is unique, adapted to either the
composition of specific and often complex ores, or to certain ranges of metal scrap
and/or residues. Particular processes and plant lay-outs are determined by (1) ore
composition, including the amount and nature of its intrinsic accompanying im-
purities and their own markets and value, and (2) the required purity of the result-
