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首页> 外文会议>National Seminar on "Application of Chemical Engineering for Utilisation of Natural Resources (CHEMINAR-2001)", Feb 16-18, 2001, Bhubaneswar >Grindability Characteristics of Low Grade Ores Useful for Refractory Applications
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Grindability Characteristics of Low Grade Ores Useful for Refractory Applications

机译：可用于耐火材料的低品位矿石的可磨性特征

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摘要

Since for upgradation of ore values, comminution is an essential and energy intensive process as well as the selection and capacity of the mill also depend on the grindability characteristics of ores, an attempt has been made to determine the work index of an ore using Bond's grindability method. This paper deals with the selected low-grade ores such as chromite, bauxite and graphite, which are distinctly different in physical and chemical characteristics and useful for refractory applications after upgradation of the crude ore by different mineral processing techniques. The test results conclude that the work index values of these ores vary from 10.5 ― 12.9 kWh/t only. This is further reduced to around 8 kWh/t by thermal pre-treatment. The relative saving in power by thermal pre-treatment achieved is 28%. Thus, it is observed that the power consumption does not vary significantly for grinding the ore to liberate the valuables from these crude ores. A reduction in the power consumption could also be achieved by thermal shock treatment.
机译：由于要提高矿石价值，粉碎是必不可少的能源密集型过程，而磨机的选择和产能也取决于矿石的可磨性，因此已尝试使用Bond的可磨性来确定矿石的工作指数方法。本文介绍了选定的低品位矿石，例如亚铬铁矿，铝土矿和石墨，它们的物理和化学特性明显不同，并且通过不同的选矿工艺对粗矿石进行提质后可用于耐火材料。测试结果表明，这些矿石的工作指标值仅在10.5〜12.9 kWh / t之间变化。通过热处理可以将其进一步降低至约8 kWh / t。通过热预处理实现的相对功率节省为28％。因此，观察到，用于研磨矿石以从这些粗矿石中释放贵重物品的功率消耗没有显着变化。通过热冲击处理也可以降低功耗。

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