Journal
MINERAL PROCESSING AND EXTRACTIVE METALLURGY-TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY
Volume 130, Issue 3, Pages 192-201Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/25726641.2018.1521578
Keywords
Comminution; laterites; selective grinding; nickel upgrade
Categories
Ask authors/readers for more resources
The study investigated the optimal grinding conditions for potential nickel upgrade using laterites from Evia island, Greece, through wet grinding batch experiments. Results showed that nickel tends to concentrate in the finer fraction with increasing grinding times, leading to a significant increase in nickel recovery while only a slight decrease in its grade is noticed.
In this study wet grinding batch experiments were performed in a laboratory ball mill using laterites from Evia island, Greece, in order to determine the optimal grinding conditions for potential nickel upgrade. Selective grinding which exploits the different grindability between soft and hard minerals was considered. Kinetic models were determined based on population balance considerations for different feed and ball sizes. The efficiency of selective grinding was evaluated by taking into account breakage kinetics as well as the grade and recovery of nickel in the products. The results showed that, in general, nickel tends to concentrate in the finer fraction of -0.075 mm. In this fraction nickel recovery is increased significantly with increasing grinding times, while only a slight decrease in its grade is noticed. The results of breakage rate analysis indicate that nickel bearing phases are ground with a higher rate when shorter grinding times are used.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available