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Materials-Metals 2017
Page 54
November 16-17, 2017 Paris, France
13
th
Annual Conference on
Materials Science, Metal and Manufacturing
Journal of Materials Science and Nanotechnology
Volume 1 Issue 2
Chloride removal from the secondary source of
zinc
N Dakhili, H Razavizadeh, M T Salehi
and
S H Seyedein
Iran University of Science and Technology, Iran
Z
inc containing wastes/secondaries such as zinc ash, dross,
flue dusts, sludge, residue etc. are generated in various
chemical and metallurgical industries. The materials con-tain
different level of impurities depending on the source. If zinc
content material, like zinc ash and zinc slag, contains various
amounts of chlorides like zinc chloride, zinc oxy-chloride,
which comes from ammonium chloride and other chloride
fluxes used by galvanizers, the chloride content has to be
removed for the evaluation of this secondary resource for
recovery as zinc metal or zinc oxide. The results (of the gal-
vanizing slag’s treating that left after some pyrometallurgical
prosses) indicate that roasting at 800 °C for 30 min, followed
by alkali washing treatment, at 70 °C for 45 min by 1/6 solid/
liquid ratio and 1.5 times the stochiometric amount, will
useful for chloride removal with 94% efficiency.
nafiseh_dakhili@hotmail.comMater Sci Nanotechnol 2017, 1:2