Investor Presentaiton
Review of Process Flow Sheet
LAKE
RESOURCES
Proven flow sheet produces high purity battery grade lithium carbonate¹ within several hours of extraction
Various Waste
Streams
NaOH
HCI
4
H₂O
WASTE BRINE
Kachi Phase 1 Commercial Flow Sheet
H₂O
10
CHLOR ALKALI
PLANT
WASTE TREATMENT
WASTE CRYSTALLISATION
AND EVAPORATION
HC NaOH
NaOCI Bleed To Waste HO NaCO
Treatment
WASTE CRYSTALS
HO
TO DISPOSAL
HCI NaOH Na SO
NACIO HO
5
BRINE FEED AND
REINJECTION
WELLS
REINJECTION
POND
FEED POND PH ADJUSTMENT
H₂O
1
SPENT BRINE
LITHIUM ION EXCHANGE
(LILAC)
2
NaOH
HC
ULTRAFILTRATION
Wash Water (To
Waste Treatment)
HC
H₂O
NaOH
Na,CO
8
HC
NaOH
IMPURITY REMOVAL
DIVALENT ION
EXCHANGE
BORON REMOVAL
ION EXCHANGE
ELUATE
EVAPORATION
Waste (To Waste
Treatment)
Waste (To Waste
Treatment)
LITHIUM
CARBONATE
PRECIPITATION
ELUATE
ELUATE REVERSE
OSMOSIS
Tail gas
SODIUM
HYPOCHLORITE
PRODUCTION
HO
Nacio
Bleed To Waste
Treatment
H₂O
BLEED
H₂O
Ca(OH)
Na CO-
IMPURITY REMOVAL
PRECIPITATION AND
FILTRATION
NaOH
9
LITHIUM
CARBONATE CENTRIFUGATION
THICKENING
PRODUCT
DRYING
萬萬
PRODUCT
MICRONISING AND
BAGGING
1 Refer to ASX announcement on 3 April 2023; 19 June 2023; 28 September 2023 and 18 December 2023.
HCI
MAKEUP SALT
SALT
CRYSTALS
BLEED
CRYSTALLISER
BLEED
DECARBONATION
BATTERY-GRADE
LITHIUM
CARBONATE
Commentary
Proposed flowsheet illustrating the 10 major process steps¹
Feed is extracted and pumped from brine extraction network to
the (1) Feed Pond, which provides surge volume between
extraction wells and the main processing plant
The brine is pH-adjusted to precipitate iron and then fed to a (2)
filtration system to remove suspended solids. The filtered brine
is then processed in the (3) direct extraction package, which
recovers and concentrates lithium to the eluate stream (4)
Effluent and depleted brine from the DLE is sent to reverse
osmosis ("RO") treatment and (5) Brine Reinjection Pond
respectively. The eluate stream is then concentrated through
(6) reverse osmosis and then (7) treated to remove impurities
by the staged addition of lime and sodium hydroxide. The
purification is followed by evaporation using mechanical vapour
recompression ("MVR") technology to increase the lithium
concentration for processing into lithium carbonate. Both the
reverse osmosis and MVR systems recover water for recycle to
minimize process water consumption
☐ Before carbonation residual trace impurities are removed by ion
exchange to obtain the purity required for further processing to
battery grade lithium carbonate
Lithium carbonate is then (8) precipitated from the purified
stream by addition of sodium carbonate, the primary reagent
input for the carbonation process. The precipitated lithium
carbonate is washed through (9) two stages of centrifuging to
achieve the final product purity required. This product is dried
and packaged for sale
To meet the hydrochloric acid and sodium hydroxide demands
of the process, an on-site (10) chloralkali plant
electrochemically converts sodium chloride from the waste
brine into these reagents
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