The article presents results of investigations on a high-pressure comminution process carried out in the roller press device, aiming at potential improvement of effectiveness of downstream beneficiation operations. The major point of interest of the paper concerned an assessment of the useful mineral liberation in relation to the volume of operating pressing force in the press device. Obtained results of mineral liberation were compared to flotation effects and downstream grinding process in a ball mill. Environmental influence in terms of dust emission was also analysed. The feed material was crushed in the high-pressure roller crusher (HRC) device under four different values of pressing force (F_sp): 3.0, 3.5, 4.0 and 4.5 N/mm². Each product then underwent the liberation analysis, together with determination the energy savings through calculation of Bond’s working index, flotation recoveries and grinding kinetics. Results of investigations showed that both the most favourable crushing results and mineral liberation level were achieved for the highest values of operational pressing force. Nevertheless, the observed effects were less than linear together with further increasing of F_sp in HRC device. However, the obtained results of investigation unambiguously showed that pressing force affects the obtained crushing results: comminution degrees and flotation recoveries were higher while the duration of downstream grinding operation and grinding energy consumption were lower.

中文翻译：

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通过在矿石粉碎回路中使用HRC装置解放硫化铜的潜在好处

本文介绍了在辊压机中进行的高压粉碎过程的研究结果，旨在潜在地改善下游选矿操作的有效性。本文的主要兴趣点在于评估与压榨装置中操作压榨力大小相关的有用矿物释放。将获得的矿物释放结果与球磨机中的浮选效果和下游研磨过程进行了比较。还分析了粉尘排放对环境的影响。进料在高压辊式破碎机（HRC）装置中以四种不同的压力值（F _sp）进行破碎：3.0、3.5、4.0和4.5 N / mm ²。然后对每种产品进行释放分析，并通过计算邦德的工作指数，浮选回收率和研磨动力学来确定节能量。研究结果表明，对于最大的操作压力值，都实现了最有利的破碎效果和矿物释放水平。然而，随着HRC设备中F _sp的进一步增加，观察到的效果还不如线性。但是，研究的结果清楚地表明，压力会影响破碎的结果：粉碎度和浮选回收率较高，而下游磨削时间和磨耗能量较低。