 |
|
|
 |
 |
 )) expertise - comminution |
TESTWORK PROGRAMS / ORE CHARACTERISATION
OMC specialises in development of testwork programs for the purposes of comminution circuit design and capacity modelling.
The process involves working with project geologists to obtain knowledge of the geology. Based on this understanding a lithological, spatial or mining schedule sample selection program is developed.
Dependant on the sample source, whole rock, PQ core, ½ or ¼ core samples, a testwork program is developed to characterise comminution properties of the ore and assess variability.
OMC typically uses the JK Drop Weight Test and a suite of laboratory tests often referred to as the Advanced Media Competency Test (AMCT) to characterise the ore.
The following Tests are undertaken as part of the AMCT suite:
• Autogenous Tumble Test
• Impact Crushing Strength
• Unconfined Compressive Strength
• Bond Work Indices (Rod and ball)
• Abrasion Index
The testwork is outsourced to independent metallurgical laboratories worldwide.
The testwork results obtained from AMCT and JK Drop Weight testing are particularly useful when compared to other ore types with known comminution behaviour in the OMC database. The extensive database, compiled over 25 years, of testwork results, survey and circuit performance data, provides strong guidance on the most appropriate circuit for a given ore. The results also provide input to HelpSAG power based and JkSimMet modelling for major equipment selection.
Variability modelling can typically be undertaken on samples with a top size as small as ¼ HQ core with the modified JK Drop Weight test, known as the SMC test, and Ball work indices. These tests identify the high and low energy breakage characteristics of the samples. Results, in combination with a mining schedule, can be used to assess plant production over a life of mine.
>> go to top  |
|
| |
 |
|
|
