An investigation into the influence of microwave treatment on mineral ore comminution
An investigation into the influence of microwave treatment on mineral ore comminution
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DOI：
10.1016/j.powtec.2004.08.006
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发表时间：
2004-09-08
影响因子：
5.2
通讯作者：
Greenwood, R
中科院分区：
文献类型：
--
作者：
Kingman, SW;Jackson, K;Greenwood, R
研究了微波预处理对矿石破碎的影响。对铅锌矿样品进行微波预处理后进行强度试验，测定了强度随微波暴露时间的变化。比较了微波处理前后材料的强度变化。使用多模微波腔，发现当使用15kW的微波功率时，强度可以在0.5s内显著降低。在这种类型的腔中，较低的功率被发现效果较差。落锤试验被用来量化的强度变化方面的减少所需的粉碎能量。平均尺寸为14.53 mm的颗粒实现了高达40%的减少。在单模微波腔中的初步测试在10 kW的微波功率下仅停留时间为0.1 s，强度减少了50%，表明高电场强度在矿石的失效中是重要的。一个初步的能量平衡表明单一模式加热的好处。(C)2004 Elsevier B.V.保留所有权利。
The influence of microwave pre-treatment on mineral ore breakage has been investigated. Samples of lead-zinc ore were microwave pretreated prior to strength testing and change in strength with microwave exposure time determined. Comparisons of change in strength were made between microwave-treated and -untreated material. Using a multimode microwave cavity, it was found that strength could be significantly reduced in 0.5 s when using 15 kW of microwave power. Lower powers in this type of cavity were found to be less effective. Drop weight tests were used to quantify the change in strength in terms of reduction in required comminution energy. Reductions of up to 40% were achieved for particles of mean size 14.53 mm. Preliminary tests in a single-mode microwave cavity gave strength reductions of 50% at 10 kW of microwave power with a residence time of only 0.1 s, indicating that high electric field strength is important in the failure of ore. A preliminary energy balance indicating the benefits of single-mode heating is presented. (C) 2004 Elsevier B.V. All rights reserved.