- Hydrometallurgical testwork undertaken on samples from KRR’s Speewah Specialty Metals Project has produced high purity titanium dioxide.
- The project has Australia’s largest vanadium-in-magnetite deposit.
- The Company intends to expand the project focus to developing a process flowsheet to produce high purity vanadium pentoxide, vanadium electrolyte and titanium dioxide products.
- KRR recently released a robust pre-feasibility study on high purity alumina production from market available industrial concentrates.
Australian explorer King River Resources Limited (ASX:KRR) is riding high on its latest update on the production of a high-purity titanium dioxide (TiO2) product assaying 99.73%.
Triggered by the update, KRR shares rose ~4% to trade at AU$0.027, on 22 July 2021.
The Company has updated on successful outcomes from hydrometallurgical testwork undertaken by Nagrom Metallurgical for producing high purity TiO2 from its wholly owned Speewah Specialty Metals Project (SSMP) in the Kimberley of Western Australia.
Source: KRR update, dated 22 July 2021
With the Company’s activities proceeding like clockwork, the latest results build on the success of robust High Purity Alumina (HPA) pre-feasibility study.
Overview of the Vanadium and Titanium SSMP
The Company’s commitment to expanding its project is geared towards developing a process flowsheet to produce high purity titanium dioxide, vanadium electrolyte (VE), and vanadium pentoxide (V2O5) products. These are used to manufacture titanium oxide pigments, vanadium flow batteries, and master alloys (Al-Ti-V materials).
The project is based on the Company’s 100%-owned vanadium deposit, which comprises a Measured, Indicated, and Inferred Mineral Resource of 4,712 million tonnes at 3.3% TiO2, 0.3% V2O5, and 14.7% Fe. Remarkably, it is the largest vanadium-in-magnetite deposit in Australia.
KRR plans to conduct an open-cut mining operation on the Central Vanadium deposit, which outcrops and has shallow dipping geometry. In addition, the Company plans on developing a process flow sheet that would process the samples of high-grade vanadium from the Central Vanadium deposit.
Testwork produces high-purity titanium dioxide
The product generation testwork is initially focused on precipitating a titanium oxide product by solvent extraction (SX) and hydrothermal methods.
The magnetic mineral concentrates of magnetite-titanium from three diamond core holes in the Central deposit were leached in sulphuric acid under various test conditions for producing nine leachate solutions (AVL14-22).
The leach liquors were combined to provide 5L for the SX-Hydrolysis testwork. The bulk composite liquor assayed 12,882mg/L Ti, 2,143mg/L V and 87,763mg/L Fe.
Source: Copyright © 2021 Kalkine Media, Data Source: KRR update, dated 22 July 2021
The test work produced a high purity TiO2 calcine product assayed 99.73% TiO2. The main contaminants were Si (120ppm), Na (90ppm), S (70ppm), K (30ppm), Ba (30ppm), Zn (21ppm), Fe (15ppm), P (10ppm), and Al and Sn (5ppm), with 0.3% Loss on Ignition (LOI). V was <1ppm.
Additional testwork is required to:
- Refine and optimise the process
- Improve Titanium recoveries
- Increase TiO2 purity by reducing LOI
KRR advances to produce vanadium pentoxide
A suitable organic extractant and diluent has been identified using SX testwork, which would be used for extracting vanadium from the sulphuric acid leach liquors at high V selectivity.
The Company has indicated that the testwork using the Ti-depleted leach liquors (used in the Ti testwork) is underway and would be reported on successful completion.