Low-grade ultramafic nickel ores contain a high percentage of serpentine which, while having deleterious effects on processing, makes these ores a desirable feedstock for mineral carbonation. By conducting microwave pre-treatment, serpentine is shown to be converted to olivine, which increases the carbon uptake when compared to directly carbonating the untreated ultramafic nickel ore tailings. The effect of microwave pre-treatment and mineral carbonation of ultramafic nickel ore and the resultant impact on settling and filtration are explored. Results show by pre-treating the nickel ore for 15 min using microwave the settling and filtration rate of the ore slurry has been improved; also, the turbidity of the filtrate and moisture content of the filter cake has decreased. However, results also indicate that mineral carbonation hinders settling even though it improves the filtration rate.
Victoria Day
The university will be closed.