The effect of microwave pretreatment on impact breakage of copper ore
The effect of microwave pretreatment on impact breakage of copper ore
复制标题
DOI：
10.1016/j.mineng.2011.08.017
复制
发表时间：
2011-11-01
影响因子：
4.8
通讯作者：
Rizmanoski, Vladimir
中科院分区：
文献类型：
--
作者：
Rizmanoski, Vladimir
已有研究表明，极短的高强度微波辐射会导致矿石强度降低。本文研究了调制微波功率对铜矿破碎的影响。这种功率传输方法被应用于确定斑岩铜矿的强度是否可以在比连续功率更低的平均调制功率水平下被降低。通过对比落锤试验，量化了处理和未处理矿石的抗碎性变化。矿石矿物学研究采用矿物解离分析仪(MLA)进行矿物表面鉴定，X射线层析进行体积分析。落锤对比试验表明，在5kW调制功率下，5 S处理的材料比未处理的材料弱。然而，对于这种特殊的低品位矿石，所达到的破碎程度可以用相当少的机械能来实现。通过使用更高水平的微波功率，可能会比使用传统方法获得更好的解放。(C)2011爱思唯尔有限公司。保留所有权利。
It has been shown that very short exposures to a high level of microwave power lead to reductions in ore strength. In this paper, the influence of modulated microwave power on copper ore breakage has been investigated. This approach to power delivery is applied to ascertain whether the strength of porphyry copper ore can be reduced with lower average modulated power levels than using continuous power. Changes in resistance to breakage of the treated and untreated ore were quantified by comparative drop weight tests. Mineralogical investigation for the ore was carried out with the Mineral Liberation Analyser (MLA) for surface identification of minerals and X-ray tomography for volumetric analysis. The comparative drop weight tests showed that material treated for 5 s at 5 kW of modulated power was weaker than untreated material. However, for this particular low grade ore, the degree of breakage which was achieved could be achieved with substantially less mechanical energy. It is possible that by using much higher level of microwave power, better liberation might be achieved than using conventional methods. (C) 2011 Elsevier Ltd. All rights reserved.