The FLSmidth Dawson Metallurgical laboratory has extensive experience in hydrometallurgical testing of precious metals and base metals. Leaching can be conducted at different sizes from small scale shaker tests to 500, 1000 or 5000 gram bottle roll tests; agitation leaches of up to 40 gallons have been conducted. Bench scale Parr autoclaves (2 Liter) are also used for pressure oxidation test work. The following services are available.
Precious Metals Hydrometallurgical Testing
Precious Metals Hydrometallurgical Testing
- Bottle roll cyanidation
- Agitation leach cyanidation
- Diagnostic leach cyanidation
- Column leach testing (6 inch to 2 feet diameter columns)
- Agglomeration testing (pretreatment for column leach fines)
- Carbon-in-leach (CIL), carbon-in-pulp (CIP), carbon-in-column (CIC)
- Carbon adsorption isotherms
- Pressure oxidation (autoclave) pretreatment - cyanidation
- Chemical oxidation pretreatment
- Bio-Oxidation pretreatment
- Total and WAD cyanide determination (ASTM distillation)
- Cyanide destruction (INCO-SO2, Caro's Acid and hydrogen-peroxide)
Base Metals Hydrometallurgical Testing
- Bottle roll acid leaching
- Agitation acid leaching (ambient or elevated temperatures)
- Diagnostic copper leaching
- Column leaching
- Agglomeration and acid cure testing
- Pressure oxidation (autoclave) testing
- Bio-Oxidation testing
