Caribou, the cornerstone of Trevali's zinc strategy ...
Oct 01, 2017· "It was a bit of a Frankenstein, to be honest. Each mining company tweaked bits and pieces so you had a variety of standards, whether it was piping or pumping." Trevali updated the piping and pumping and built a new SAG mill which grinds the rock to particles measuring 30 microns. That is fine enough for typical zinc-bearing ores.