Tag Archives: particle

DOWNSTREAM TESTWORK DEMONSTRATES HIGH QUALITY GRAPHITE FOR LITHIUM-ION BATTERIES

·       Spherical Purified Graphite (SPG) with world-leading specifications successfully produced from Kasiya

·    Kasiya’s spherical graphite purification demonstrated exceptionally low levels of residual impurities achieving a 99.99% loss-on-ignition (LOI)

·     Kasiya SPG demonstrated all required parameters within industry standards with spheronisation yields of up to 68% with further scope to optimise in future testwork

·     Testwork was undertaken as part of the Company’s graphite strategy to qualify and commercialise graphite concentrate for use in the lithium-ion battery sector

Sovereign Metals Limited (ASX:SVM; AIM:SVML) (the Company or Sovereign) is pleased to announce the results of downstream testwork conducted at leading, independent consultancy ProGraphite GmbH (ProGraphite) in Germany.

Sovereign provided Kasiya graphite concentrate to ProGraphite to produce and characterise coated spherical purified graphite (CSPG) active anode material for lithium-ion batteries. The overall program includes shaping and purification to produce SPG, coating of the material to produce CSPG and evaluation of the electrochemical performance of Kasiya CSPG in a battery. The initial steps of shaping and purification to produce SPG have now been completed with the results showing Kasiya SPG has world-leading specifications.

This SPG material is now undergoing coating and electrochemical testing to characterise CSPG active anode material for lithium-ion batteries.

1.     National Standard of China – Spherical Graphite (GB/T 38887-2020)

The micronisation and spheronisation of Kasiya graphite concentrates achieved excellent yields to spherical graphite for the coarse concentrate and typical yields to spherical graphite for the fines concentrate, with room for further optimisation. The spherical graphite from the fine graphite concentrate in particular exhibited a narrow particle size distribution (D90/D10) ratio and both spherical graphite have reasonable Tap Density and typical BET for uncoated graphite. Coating of the graphite is expected to improve (increase) the tap density and improve (lower) the BET specific surface area. 

The spherical graphite products were purified with commercially proven acids purification and achieved excellent results with an exceptionally high LOI purity of 99.99%. Assays on key trace elements (Fe, Na, Cr, Cu, Al, Mo) show very low levels.

Further, the low Si and Ca results highlight that high quality Kasiya graphite is well-suited to single stage acids purification. Aggressive dosing in acids purification can result in elevated Ca levels due to precipitation of CaF₂, necessitating multiple stages of purification to reduce both Si and Ca impurities. These initial purification results indicate that a single purification stage is sufficient for Kasiya graphite concentrate.

The SPG samples will undergo coating and electrochemical tests to provide baseline data for offtake discussions. The results of these tests are expected in the coming weeks.

Managing Director Frank Eagar commented: “These results clearly demonstrate that Kasiya has the potential to disrupt the China dominated graphite supply chain as a long term, secure source of high quality graphite ex-China. We believe Kasiya graphite will have industry low operating costs and is also one of the largest graphite resources globally holding a significant advantage over its graphite peers. We are very pleased to achieve these outstanding results at this stage of the program and will continue fast tracking our graphite product development and qualification campaign.”

Classification 2.2: This announcement includes Inside Information

ENQUIRIES

Competent Person Statement

The information in this report that relates to Metallurgical Testwork is based on information compiled by Dr Surinder Ghag, PhD., B. Eng, MBA, M.Sc., who is a Member of the Australasian Institute of Mining and Metallurgy (MAusIMM). Dr Ghag is engaged as a consultant by Sovereign Metals Limited. Dr Ghag has sufficient experience, which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking, to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Dr Ghag consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.

The information in this report that relates to Exploration Results is based on information compiled by Mr Samuel Moyle, a Competent Person who is a member of The Australasian Institute of Mining and Metallurgy (AusIMM). Mr Moyle is the Exploration Manager of Sovereign Metals Limited and a holder of ordinary shares and unlisted performance rights in Sovereign Metals Limited. Mr Moyle has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken, to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Moyle consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.

Forward Looking Statement

This release may include forward-looking statements, which may be identified by words such as “expects”, “anticipates”, “believes”, “projects”, “plans”, and similar expressions. These forward-looking statements are based on Sovereign’s expectations and beliefs concerning future events. Forward looking statements are necessarily subject to risks, uncertainties and other factors, many of which are outside the control of Sovereign, which could cause actual results to differ materially from such statements. There can be no assurance that forward-looking statements will prove to be correct. Sovereign makes no undertaking to subsequently update or revise the forward-looking statements made in this release, to reflect the circumstances or events after the date of that release.

The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 as it forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018 (‘MAR’). Upon the publication of this announcement via Regulatory Information Service (‘RIS’), this inside information is now considered to be in the public domain.