RE: Xi think China’s lost it8 Nov 2022 11:23
DP/SP referring back to no pilot work, refer to the annual report, together its photogrpahs of the pilot plants. Statement regarding completed pilot works
The testwork for the MREDS plant design was undertaken by Nagrom at their facility in Perth, with vendors brought in as required. The following MREDS testwork was completed during the reporting period, with several items continuing:
• Continuous piloting of the acid mixing and baking circuits
to produce representative feed for downstream processing, including exposure of corrosion coupons to process conditions to assist in the selection of appropriate materials of construction;
• Optimisation of the leach extraction process to reduce costs while still producing quality MREDS product;
• Piloting of the leach extraction and impurity removal processes, the latter of which is continuing, and will culminate in the piloting of the MREDS precipitation circuit; and
• Vendors of key equipment were invited to view their respective areas of the process, taking samples where required for equipment sizing.
Lastly, confirmatory testwork was undertaken on Saltend refinery processes to provide samples for vendor testwork and equipment sizing, including:
• front-end caustification, oxidation and redissolution of
the Longonjo MREDS;
• solvent extraction (SX) isotherm development;
• impurity removal by ion exchange; and
• final product precipitation for equipment sizing.
The images show examples of testwork stages that were undertaken.