Co, WC Recovery from waste equipment made from interstitial cobalt-tungsten carbides

Abstract

This research includes restoration tungsten carbide and cobalt metal from their
manufacturing bad apparatuses to use them for the same aim or for another aims . The
mass density for the bad apparatuses was determined by the classical physical methods
and they were milled by using hammering mill to different volumes , then by screening
processes the particles were separated to known volumes reaches to (5-10) micrometers .
The obvious density for these particles were measured and the relation between these
densities and their volumes were plotted , then the cobalt was extracted as (Co3+) by using (HCl) (32%) and non-soluble tungsten carbide as (WC) and (W2C) were separated by
filtering process to lead back to different industrial uses . (Co3+) was precipitated as
cobalt metal by two processes . In the first process hydrogen gas was used for end of this
process a qualitative analysis was mad to detect of (Co2+) by using sodium hydroxide (0.1
N) as a reagent . In the second process a second reduction process had been made to
convert (Co2+) to (Co) metal by using (H2) gas , also a qualitative detection was made for
(Co2+) by using (Na OH) reagent . The weighting percentage of cobalt and tungsten be for
and after the extraction processes were determined by using X-Ray and flame atomic
spectroscopy technicalities .
According to these studies , we suggested the chemical formula for the alloy , also the
production percentage of extracted cobalt and tungsten carbides were determined .