The locked cycle tests target high-grade alumina production with increased recoveries and operating efficiencies which may reduce process plant capital and operating costs.
Results from the test work will provide the basis for possible process improvements in the upcoming pilot plant test program as part of FYI’s bankable feasibility study (BFS).
READ: FYI Resources to build Cadoux HPA pilot plant for product application testing and project financing
FYI managing director Roland Hill said: “The locked cycle test work is an integral component to the development and refinement of the HPA process design flowsheet.
“We consider this phase to be very important in the lead-up to the pilot plant and then ultimately into the BFS in demonstrating the effectiveness of our HPA flowsheet and then of course the economic impact to the overall project economics.
“We look forward to the results of the locked cycle test work and to the continued improvement of the HPA flowsheet that the testing should provide.”
A schematic of FYI’s key milestones timeline ahead of completing its bankable feasibility study
A locked cycle test is a repetitive batch test conducted at laboratory level to assist in implementing improvements to the HPA process flowsheet design.
The test work has five main functions:
Assess the suitability of the flowsheet design;
Produce and then calculate a metallurgical projection for the HPA produced;
Gauge process recovery rates and efficiencies;
Provide valuable metallurgical data and information; and
Determine if the process reagent suite is stable and suitable for commercial production.
As it simulates a continuous flotation circuit, the basic locked cycle test performs a complete batch test in the first cycle, followed by similar batch tests that contain ‘intermediate’ material from the previous cycle.
These batch tests or cycles are continued in this iterative manner.
The final concentrate and final tailings from each cycle is filtered and thus removed from further processing.
At the end of the test, all the final and intermediate products are dried, weighed and subjected to chemical analysis.