Danakali Limited · OTC:SBMSF
Danakali — Technical Presentation (June 2021)
20 slides from Danakali's technical presentation, Jun 17, 2021
Slide 1: Colluli Process Development
0 DANAKALI COLLULI PROCESS DEVELOPMENT Rod McEachern
Slide 2: Executive Summary
DANAKALI EXECUTIVE SUMMARY
Slide 3: Goals of the SRC/GPS Testing 2020/21
GOALS OF THE SRC/GPS TESTING 2020/21 DANAKALI create. nurture. crow, wg S FS STAGE 1 FLOTATION STAGE 2 FLOTATION EQUIPMENT TESTING SOP PRODUCTION Develop and prove a flotation Determine the feasibility of Determine kinetics of reactions for To develop a robust process for strategy which will remove
Slide 4: Overall Reaction for Colluli
OVERALL REACTION FOR COLLULI DANAKALI create. nurture. crow, Pilot testing in 2015 proved conceptually that SOP could be made from Colluli ore. However, the quantities of water used in 2015 were not economically feasible, and relied on high purity (RO) water to make adequate purity. Testing in 2020/
Slide 5: Overall Reaction for Colluli
OVERALL REACTION FOR COLLULI DANAKALI create. nurture. crow, The overall process for Colluli is reaction of Kainite and KCI to produce SOP: KCI-MgSO«:3H20 sr Cop. Mg?* 2c Kainite (a3) e. ©. © ° 674,286 TPY 201,880 TPY 472,000 TPY Kainite (KCI-MgSO«-3H20) is largely derived from the kainitite ore The
Slide 6: Stage 1 Flotation Testing
STAGE 1 FLOTATION TESTING Oo create. nurture. crow, Each of the three ore streams were evaluated separately to determine the best flotation process Direct and reverse flotation were both evaluated Several different collectors were evaluated for each ore stream Kainitite and Carnallitite are effectiv
Slide 7: Stage One Flotation Testing
v STAGE ONE FLOTATION TESTING DANAKALI reste, ure. grove The three individual ores were tested separately to determine: How fine the ore needs to be ground Type of collector Optimal dosage of collector Requirements for depressants (which inhibit flotation of unwanted minerals) Expected recovery of t
Slide 8: Stage 2 Testing
STAGE 2 TESTING In Stage 2 testing, flotation performance was evaluated for all possible combinations of the three ore streams This information was used to determine which ore streams could be combined (thus simplifying the process, and reducing capital costs) DANAKALI reste, nurture. grove The anal
Slide 9: Stage 2 Flotation Testing
STAGE 2 FLOTATION TESTING Stage 1 testing gave expected recoveries for each individual ore stream In Stage 2 the various ores were blended, and the expected perfor- mance was predicted as a weighted average of the recovery for the individual ore streams Each combination of the ores was then evaluate
Slide 10: Column Flotation
COLUMN FLOTATION DANAKAL Stage 1 tests were done using conventional (Denver) lab flotation equipment Column flotation is the preferred technology for Colluli ores, and gives the best combination of high recovery and low impurities Testing in Stage 2 was performed using column flotation. The results
Slide 11: Equipment Testing
EQUIPMENT TESTING DANAKALI create. nurture. crow, Aseries of short tests was performed to provide information useful for process design. This included: Kinetics for decomposition of Carnallite and Kainite. This information provides the retention time required for the reaction, and is used for tank s
Slide 12: Equipment Testing
EQUIPMENT TESTING Carnallite decomposes into KCI, and Kainite decomposes into Leonite Decomposition is a function of time and the amount of excess brine, relative to the theoretical minimum (TM) The kinetics must be understood for correct tank sizing, and for the mass balance. LEONITE PARTICLE SIZE
Slide 13: SOP Production
Grade (96) SOP PRODUCTION Y DANAKALI Preliminary specifications have been developed, in consultation with our offtake partner TYPICAL K20 (%) 51.0 Chloride (%) 0.5 GUARANTEE K20 (%) 50 / Chloride (%) <1 Testing in 2015 proved that SOP could be made from Colluli ore, but only at high water rates, and
Slide 14: Overall Reaction for Colluli
OVERALL REACTION FOR COLLULI The product from Carnallite/Sylvinite flotation is KCI, while the product of Kainite flotation is Leonite. Leonite reacts with KCI in the presence of water to produce SOP: @6-6:000 K2SO«:MgSO«:4H20 2 KCl 2 K2SO4 Mg** Product Specifications, developed in consultation with
Slide 15: Key Outcomes of the SRC/GPS Phase of Testing
KEY OUTCOMES OF THE SRC/GPS PHASE OF TESTING e. 1 Determination of specific 3 . Development of a robust. conditions for successful Provided performance strategy for processing flotation (crush size, collector information which has been Colluli ores by froth flotation type and dosage, type of include
Slide 16: Collaboration Partners
Collaboration Partners DRA Global GPS (Global Potash Solutions) SRC (Saskatchewan Research Council) We were extremely fortunate to have worked with a number of renowned world class experts in the potash industry sector
Slide 17: Screening and Leaching the +20 Mesh Sylvinite
SCREENING AND LEACHING THE +20 MESH SYLVINITE SYLVINITE ORE FEED CARNALLITE ORE FEED CARNALLITE POND FEED KAINITE POND FEED KAINITE ‘ORE FEED PRIMARY ‘CRUSHING e e KCI LEACH i. Saline ground water ‘CYCLONE <—> Halite tails v DANAKALI Brine bleed to Carnallite Pond Si P-e-8) SECONDARY CARNALEITE! SCR
Slide 18: Understanding the Ore
UNDERSTANDING THE ORE v DANAKALI create. nurture. crow QEMSCAN analysis was done to determine how well the desired minerals were liberated from the impurities Well liberated minerals Poorly liberated minerals 50 100 150 200 Particle size 250 300 350 400 450
Slide 19: QEMSCAN Results
QEMSCAN RESULTS HALITE >80 CARNALITE KIESERITE KAINITE me 8 a a eo , . 2" $< he FY Sy Ll een Shed tee yar or? Bes wi Ot SE BRS BP OB > she en iy > B aes & OP PS OEE Py ef BS hig oS AT 5 * Se oer be BOD Boe OWS Valet a | OP bie AaB * oe te a MG Be Ss PS Pn eee 2 ay By 1 Qy He 0 Ba @Wl Ve ET See v DAN
Slide 20: Danakali
] DANAKALI fc > < z < —L -