Abstract
The article concerns investigations over benefits of application of HRC devices into sulphide copper
ore processing plant. High pressure comminution appears to be very effective technology in hard ore
processing circuits, especially in terms of energy consumption. This can be particularly observed in
downstream grinding and beneficiation operations. A series of pilot-scale crushing tests in HRC roller
press for various levels of operating pressure, were performed. HRC crushing effectiveness along with
downstream grinding process course for each crushing product were also under analysis. The investigations
were supplemented by analysis of flotation process effectiveness and impact of the process of
high-pressure comminution on environment (dust emission). The results of investigation show that operating
pressure level influences the obtained comminution results (comminution degree, yield of finest
particle size fractions). The grinding effectiveness, measured through production of the finest particle size
fractions was significantly influenced by the operating pressure. The results show that higher values of
operating pressure (4.0 and 4.5 N/mm2) are not as efficient within this scope as the pressure 3.5 N/mm2.
Dust emission is also correlated with the operating pressure value.
Go to article