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VertiMill? – Development of Circuit Survey and Performance Evaluation Protocols

机译：VertiMill？ –制定电路调查和性能评估协议

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摘要

Approximately 420 VertiMills? (VTM) have been installed in mineral processing plants throughoutrnthe world, mainly in tertiary and regrind applications plus several in secondary grinding duties. MetsornMinerals (Metso) and the Julius Kruttschnitt Mineral Research Centre (JKMRC) have commenced arncollaborative research program in stirred milling technology focusing on mill performance evaluation,rnmodel development and scale-up methodology. Industrial VTMs are being assessed using a consistentrncircuit survey protocol to evaluate the performance of VTMs in comminution circuits. The surveyrnprotocol includes identification and modification of sampling points, appropriate sampling techniques,rncontrolled circuit stability, and best sample analysis practice.rnTo initiate this study four surveys were conducted in the tertiary grind circuit in the RidgewayrnConcentrator at Cadia Valley Operations (CVO) that treats the full circuit throughput of over 800 tph.rnTo deal with the high feed rate the site opted to lead the world in the application of stirred mills byrninstalling the largest VTM, at 3000 hp (2240kW) in closed circuit with a hydrocyclone bank. Onrnaverage the operating work index was 13.1 kWh/t, reducing the secondary grind product by 40 - 50rnμm to the required 80 to 100 μm range. The applied specific energy is relatively low in these lowintensityrnstirred media mills at 2.7 kWh/t. The size specific energy was 24.2 kWh/t-75μm. Based onrnthe survey and operating data the VTM circuit is performing well in this high-throughput tertiaryrngrinding application, producing a sub-100μm product.
机译：大约420个VertiMills？ （VTM）已安装在世界各地的选矿厂中，主要用于第三次和再研磨应用中，另外一些还用于二次研磨。 MetsornMinerals（Metso）和Julius Kruttschnitt矿物研究中心（JKMRC）已启动搅拌研磨技术的arncollaborative研究计划，重点是研磨机性能评估，模型开发和放大方法。正在使用一致的电路调查协议评估工业VTM，以评估VTM在粉碎电路中的性能。调查协议包括识别和修改采样点，适当的采样技术，受控的电路稳定性和最佳的样本分析实践。为启动这项研究，在卡迪亚河谷运营公司（CVO）的里奇韦恩选矿厂的三级磨床中进行了四项调查，以处理超过800吨/小时的全循环生产能力。为了应对高进料速度，该站点选择通过在最大水力旋流器组中以封闭的回路安装3000 hp（2240kW）的最大VTM，在搅拌磨机的应用方面处于世界领先地位。平均工作功指数为13.1 kWh / t，将二次研磨产品减少40-50rnμm，降至所需的80至100μm范围。在这些低强度搅拌式介质磨中，所施加的比能相对较低，为2.7 kWh / t。尺寸比能量为24.2 kWh /t-75μm。根据调查和操作数据，VTM电路在此高通量三级研磨应用中表现良好，可生产100μm以下的产品。

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  • 会议地点 Perth(AU)
  • 作者

    S Palaniandy; M Powell; M Hilden; K Kermanshahi; J Allen; S Mwansa;

  • 作者单位

    University of Queensland, Sustainable Minerals Institute,Julius Kruttschnitt Mineral Research Centre, 40 Isles Road, Indooroopilly Qld 4068.Email: s.palaniandy@uq.edu.au;

    University of Queensland,40 Isles Road, Indooroopilly Qld 4068. Email: m.powell2@uq.edu.au;

    University of Queensland, 40 Isles Road, Indooroopilly Qld 4068. Email: m.hilden@uq.edu.au;

    Metso Minerals Ltd, 16 Lidco Street, Arndell Park NSW 2148. Email: kamran.kermanshahi@metso.com;

    Metso Mining and Construction Technology, 2715 Pleasant Valley Road, York Pa 17402, USA. Email: jonathan.allen@metso.com;

    Newcrest Mining Limited, Level 31, 400 George Street, Brisbane Qld 4000. Email: Sonny.Mwansa@newcrest.com.au;

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