TNG's 100% owned TIVAN® process has been under development by TNG and its metallurgical consultants in Australia since 2009.
TIVAN® is a new process designed primarily for extracting vanadium, preferably as vanadium pentoxide, from a titano-magnetite ore body, (a geological igneous rock formation that contains significant quantities of iron, titanium and vanadium), and also for separating the titanium and iron preferably as ferric oxide and titanium dioxide. The process is therefore unique in this approach as existing processes cannot extract all three of these elements at industrial-commodity-grade commercial products. The conventional means of extracting vanadium from titano-magnetite ore deposits is through a salt roasting energy-intensive, pyro-metallurgical process, which is suitable for only a narrow range of selected ore compositions and water leach route to recover a water soluble vanadium compound.
The fundamental difference and innovation introduced by the TIVAN® process route is that the vanadium is recovered entirely through a hydrometallurgical route incorporating leaching and solvent extraction. The benefit of this route is that within the same flow-sheet hematite and titanium dioxide are separated and recovered as saleable by-products in addition to vanadium pentoxide. The new process development was initiated after TNG discovered a large titano-magnetite resource in the Northern Territory in 2008, named the Mount Peake Project, and decided to proceed along a more environmentally acceptable and efficient extraction process.
The theoretical flow sheet, and subsequent test work to process the Mount Peake ore to extract the iron, vanadium and titanium is expected to use the following processes:
- Primary and Secondary Crushing
- High Pressure Grinding Rolls (HPGR)
- Magnetic Separation
- Atmospheric Leaching (leaving a titanium dioxide residue)
- Counter Current Washing of Residues
- Solvent Extraction
- Ammonium Metavanadate Precipitation, Calcination and Vanadium Petoxide Flaking
- Acid Regeneration
- Iron Precipitation
- Tailings Disposal
- Ammonia Recovery
The TIVAN® process being developed represents a world’s first for the processing of vanadiferous-titaniferous-magnetitic ore bodies by a hydro-metallurgical route , and successful completion may result in the process becoming the future standard process adopted for the commercially viable, environmentally friendly treatment and utilization of ores from such and similar deposits
Patent Application - ASX Announcements
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