King River Resources’ pilot plant produces 99.9995% purity HPA Type 1 Precursor


  • KRR is focused on producing a variety of Aluminium Salt 5N (99.999%) purity Precursors, catered to the battery manufacturing industry.
  • Bulk laboratory sample production runs are currently in progress with 99.9995% purity of Type 1 Precursor obtained in Campaign 1.
  • Source Certain International has completed the commissioning of a laboratory scale pilot plant. 
  • Laboratory work is advancing well, aiding the Definitive Feasibility Study for the Type 1 Precursor Processing Plant.

In a significant development, King River Resources Limited (ASX:KRR) has announced the successful commissioning of a laboratory-scale pilot plant and production of multiple batches of Type 1 Precursor. The Company highlighted that Source Certain International (SCI) has produced 99.9995% purity Type 1 Precursor in the very first run up of the plant (Campaign 1), signalling an encouraging outcome for a first run of the operation. 

KRR is committed to producing a number of Aluminium Salt 5N (99.999%) purity Precursors required in the battery manufacturing industry and continues to test with other Cathode Active Materials precursors (P-CAM). 

RELATED ARTICLE: King River Resources (ASX:KRR) advancing HPA project at brisk pace

Campaign 1 Type 1 Precursor – Aluminium Salt

Source: KRR Update, dated 3 December 2021

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A Snapshot of Campaign 1 Results

The ARC Process used an industrial chemical compound feedstock to produce the Campaign 1 Precursor 1 Aluminium salt.

SCI assayed the Campaign 1 Precursor product using the ICP-MS and ICP-AES methods and completed four duplicate analyses on the batch to improve confidence in the results. Notably, the 99.995% purity is an average of the four repeat assays.  

ALSO READ: Inside King River Resources’ (ASX:KRR) HPA development journey

Type 1 Precursor Assay Purity

Source: KRR Update, dated 3 December 2021

The main contaminants in the Precursor include potassium (K), sodium (Na), iron (Fe) and calcium (Ca).

Moreover, Campaign 2 has been completed, with results pending, while Campaign 3 has started with incorporating some continuous improvement feedback into the process steps. 

ALSO READ: King River Resources’ recent developments boost HPA DFS progress

P-CAM and other developments makes headway

Testing is also underway to produce P-CAM’s, an intermediate mixed metal hydroxide used in manufacturing Lithium-Ion Battery (LiB) cathode. 

The recent samples of the Company’s Nickel-Cobalt-Aluminium (NCA) P-CAM Batch 5 have been submitted for sizing analysis and Scanning Electron Microscope (SEM) imagery, with a focus on grain size distribution.

P-CAM’s are typically made using a co-precipitation process whereby salts of nickel, cobalt, manganese and aluminium are precipitated as a mixed metal hydroxide of specific composition, morphology and particle size distribution.

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In addition to P-CAM’s, SCI continued evaluation for the production of other high purity aluminium-based precursors using the Type 1 Precursor salt.

Other precursors in focus and their applications include:

  • Type 2 Precursor: An aluminium compound used in manufacturing HPA and LiB cathodes.
  • Type 3 & 4 Precursors: Aluminium salts used in manufacturing LiB Cathodes, as coatings for LiB electrodes, LED phosphors and in the electronics and optics industry.

DFS advancing well

The laboratory work is ongoing to support the Definitive Feasibility Study for the Type 1 Precursor Processing Plant.

During November-end, COMO Engineers’ senior process engineering team visited the laboratory to witness the pilot plant in operation and observe how the material was handled, filtered and crystal properties. Notably, COMO Engineers was awarded the DFS for the HPA Type 1 Precursor Processing Plant in October 2021.

READ MORE: King River Resources (ASX: KRR) awards DFS to Como Engineers

King River Resources remains on track concerning the successful commissioning and production runs of the laboratory scale pilot plant, along with the DFS work. 

KRR shares were trading at AU$0.024 in the early hours of 3 December 2021.





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