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Hydrometallurgy andElectrolytic Processes
Metagross: Bello; Cabading; Pilapil; Tan
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Hydrometallurgy
● A branch of extractive metallurgywhich deals with the
processes involving
aqueous solutions to extract metals from
ores !"#
● $t is divided into three areas:- %eaching- &olution
concentration and purification- 'etal (compound) recovery
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Three Areas under Hydrometallurgy
1. Leaching
$nvolves the treatment of mineral
materials*specifically oxidi+ed
containing desirable metals using
acidic or basic solutions to dissolve
soluble elements and concentrate
in an enriched solution !,#
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Aqua -egia i
highly corros
mixture of nit
hydrochloric awhich will dis
most metals
including gold
platinum and
palladium
. $nternational Pre
'etals $nstitute
https://wwwyoutub
tch0v1232n%dmc4
https://www.youtube.com/watch?v=4J4nLdmcZzwhttps://www.youtube.com/watch?v=4J4nLdmcZzwhttps://www.youtube.com/watch?v=4J4nLdmcZzwhttps://www.youtube.com/watch?v=4J4nLdmcZzw
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Three Areas under Hydrometallurgy
, Solution concentration and Purification ❖ can be done in
different ways:
!i# Precipitation
!ii# Cementation
!iii# &olvent 5xtraction
!iv# $on exchange!v# 6as reduction
!vi# 5lectrowinning
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Three Areas under Hydrometallurgy
3. Metal Compound Recovery- involves the process of refining
extracted metals for c
use
- involves Electrolytic process
involves metallurgical processes that ta7e place iof
electrolytic cell
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Metal Recovery involving Electrolytic proces
- Electroinning- an electrolysis process used to recover metals
in aqu
solution* usually as the result of an ore having underg
more hydrometallurgical processes
- The metal of interest is plated onto a cathode* while
acomposed of an inert electrical conductor
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Metal Recovery involving Electrolytic proces
- Electrorefining- used to dissolve an impure
metallic anode (typically from a
smelting process) and produce a
high purity cathode
- !used salt electrolysis- another electrometallurgical process
whereby the valu
is dissolved into a molten salt* which acts as the elect
the valuable metal collects on the cathode of the cell
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&ources:
!"# Brent* 9* 'etallurgy* &urvey in
ir7>,/>2",8D"","",,>>"""a>"
!,# 5stefani* 6uillermo ?hat $s 'etallurgical %eaching0 Artinaid
Ep* ,>"8 ?,>"D
!8# 5xtractive 'etallurgy Boundless (,>"F): n pag ?eb , 3an
,>"D
9ow to -efine Precious 'etals< 9ydrometallurgy: Part ,
Concentration and Purif
$nternational Precious 'etals $nstitute
https://wwwyoutubecom/watch0v15G
9ow to -efine Precious 'etals < Precipitation:
9ydrometallurgy Part 8 by $nterna
'etals $nstitute
https://wwwyoutubecom/watch0v1>lfTtPDllT
9ow to -efine Precious 'etals < 5lectrolysis: 9ydrometallurgy
Part 2 by $nternat
'etals $nstitute
https://wwwyoutubecom/watch0v1hA7?'dr%Hmo
https://www.youtube.com/watch?v=EFzBAT6N338https://www.youtube.com/watch?v=0lfTtP6llT8https://www.youtube.com/watch?v=hAkWMdrLXmohttps://www.youtube.com/watch?v=hAkWMdrLXmohttps://www.youtube.com/watch?v=0lfTtP6llT8https://www.youtube.com/watch?v=EFzBAT6N338
