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Elements and Performance Criteria

1. Classify ore samples and select fluxing method
   • Review client request to identify sample/analysis requirements, preparation methods and equipment involved
2. Inspect samples, compare with specifications, record and report any discrepancies
3. Conduct visual and simple chemical tests to identify the type of sample and sulphide concentrations
4. Review client sample/analysis history and identify possible chemical interferences
5. Decide whether non-standard fluxing is required
6. Select sample weight and flux to optimise precious metal recovery and purity
7. Prepare for precious metal recovery
   • Identify hazards and workplace safety procedures associated with the sample, preparation methods, reagents and equipment
8. Examine the recommended preparation method to identify the critical steps that will affect the quality of analytical results
9. Plan parallel work sequences to optimise the throughput of multiple sets of samples
10. Assemble all required equipment, materials, reagents and check they are fit for purpose
11. Recover precious metals from ore sample
    • Weigh required amounts of sample and flux components to achieve an acceptable button and fluid slag
12. Select the type and size of pot to suit sample method and client requirements
13. Mix charge to ensure homogeneity and optimal collection of precious metal
14. Set and monitor furnace temperature/time to ensure complete fusion
15. Separate slag and button with minimal loss of lead collector
16. Maintain sequencing in order to track samples, buttons and prills throughout the recovery process
17. Separate lead collector from the required precious metal and check for contamination, losses and evidence of other precious metals
18. Minimise personal exposure to hazards and the release of collectors to the work environment
19. Collate laboratory documentation and the prepared sample and present for analysis
20. Troubleshoot and correct failed recovery
    • Monitor all stages of recovery for indicators of potential loss
21. Recognise undesirable recovery conditions and decide whether the process requires correction
22. Choose an appropriate corrective action and re-start the process
23. Document any adjustments made to standard methods and re-sequencing of samples
24. Seek advice when problems are beyond scope of responsibility or knowledge
25. Perform daily maintenance of assay equipment
    • Segregate and dispose of waste in accordance with workplace requirements
26. Grade and inspect pots using established criteria prior to storage for re-use
27. Inspect furnaces for cracks, unserviceable components and remove slag
28. Inspect and clean extractive systems
29. Report defective equipment and consumable requirements to appropriate personnel