Current and near-future CAMIRO-MPD research projects are outlined on this page.  CAMIRO-MPD members are encouraged to submit proposals for new projects to the Executive Committee.

Role of in situ gas nucleation/hydrodynamic cavitation in the fine particle flotation.

This research project at the University of Alberta addresses the challenge of fine particle flotation. Fine particles are lost to tailings as increasingly finer grinding tries to maximize metal recovery. There is need of technology to produce and sustain fine gas bubbles and to entrain fine particles in aggregates.

The project carried out laboratory tests and computer modelling to develop innovative methods to generate, measure and predict the effect and duration of fine gas bubbles in high intensity agitation cells and venture-type devices.

The devlopment of an appropriate small-scale test suite and associated procedure for the selection and sizing of high pressure grinding roller presses (HPGR) for hard rock ores.

High pressure grinding roll presses offer an option for primary comminution of ores with lower use of energy in underground settings. However, there is a logistical challenge that large tonne-sized samples are required to test viability of different ore types for this process.

This project tested samples provided by project sponsors and related results of grinding to small-scale tests with piston-die presses and methods developed for soil mechanics.

Application of surface characterization technologies (ASCT) towards process optimization through diagnosis and problem solving in floation and extractive metallurgy.

A wide variety of ore types have limited recovery due to incomplete reaction of mineral surfaces with reagents – a well-known challenge to metal recovery. This project intends to develop strategies for diagnosis and solution of problems, based on six case studies from mill samples of sponsors. The problems range from oxides to metal sulphides and precious metal recovery.

Development of testing methods for self-heating minerals.

Self-heating minerals are a significant problem for some ore types. Rock combustion happens underground and as well as in piles of broken rock and concentrate products on surface or during shipping. The industry needs a better way of predicting potential timing of self-heating and mitigation strategies to avoid problems. The project will research causes of self-heating, improve sample testing and address mitigation.