Improving feed quality

New and novel testing, measurement and mapping technologies to characterise and quantify waste and ore for coarse separation attributes as inputs into CRC ORE Grade Engineering® assessment and mine planning.

  program 1 define coloured blocks
An example of definition of specific domains in a large open pit operation that drive maximum value in a Grade Engineering® assessment – in this case based on application of differential blasting for conditioning grade by size (yellow blocks).

This includes predictive performance attributes across the five main rock interface separation levers which drive Grade Engineering® response. These attributes need to be embedded into spatial models and used to optimise mine planning and scheduling for maximum value.

Coarse separation involves concentration of valuable phases and removal of barren gangue phases in the ‘dig and deliver’ mining interface prior to costly and energy intensive processing.

In current practice attributes required to define and value coarse separation are typically not collected on operations. Program 1 aims to provide testing and modelling protocols to populate resource block models with separation attributes that can be used in mine planning and scheduling.
 

program 1 comparative ranking graph
Comparative ranking of average preferential grade by size Response Rankings for selected deposits. Whiskers show 25th and 75th percentiles.

 

program 1 contoured blast holes diagram
Plan view of contoured blast hole Cu grades for a set of mining benches assigned to mill based on average cut-off grades. Ideally zones shown in green are below mill cut-off grade and represent coarse separation opportunity.

  • Improving feed quality

    New and novel testing, measurement and mapping technologies to characterise and quantify waste and ore for coarse separation attributes as inputs into CRC ORE Grade Engineering® assessment and mine planning.

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  • Enabling mass separation

    Integration of operational strategies and engineering solutions to effect coarse separation in the dig and deliver interface optimised for net value.

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  • Increasing extraction efficiency

    New processing circuit designs, integrated simulation capabilities and operational control systems to exploit changes in grade and other physical properties resulting from Grade Engineered feed streams.

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  • Maximising system-value

    While Grade Engineering provides new value based options for manipulating insitu grade and delivering improved productivity, it can also be perceived as creating increased complexity. A high level of user defined options and dynamic scenarios challenges current practice.

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  • Implementation at mine sites

    CRC ORE, through its collaborative partnerships, undertakes testing at mine sites around the world as the platform for its research and development.

    These studies continue to expand, as they provide the ideal environment for industry, research and commercial partners to develop and validate step change technologies.

    Projects such as these are only possible through a large scale collaborative effort, and this structure ensures the developed technologies are shaped and validated by operating mine sites and commercial providers in a way that directly addresses the industry’s requirements.

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