Validation of a population balance model for iron ore dry grinding at the IJmuiden pelletizing plant

IF 4.9 2区 工程技术 Q1 ENGINEERING, CHEMICAL Minerals Engineering Pub Date : 2024-10-16 DOI:10.1016/j.mineng.2024.109019
Tako P.R. de Jong
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Abstract

The dry closed circuit ball mill circuits of Tata Steel’s pelletizing plant in IJmuiden receive a variable mixture of ores to produce a dry ground iron ore mixture. A population balance model was developed to help study circuit unit performance, the impact of installation modifications and influence of input materials on the performance of the circuits. Batch grinding tests were done on input materials, measuring size distribution as function of time using high resolution laser diffraction measurements. Data from the tests were fitted to a breakage and selection function model as well as a cumulative rate model. A population mass balance model of the circuit was developed based on the breakage and selection function model, as it showed a better fit to the batch data for the majority of materials. The circuit model also incorporates a mill model and model for the various classifier stages. The circuits were sampled at various locations in the flow sheet, showing fair overall agreement with model calculations. Differences between model and observations are highlighted and improvements in the modelling technique as well as the sampling discussed.

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验证伊茹迈登球团厂铁矿石干磨的物料平衡模型
塔塔钢铁公司位于 IJmuiden 的球团厂的干式闭路球磨机回路接收各种矿石混合物,以生产干磨铁矿石混合物。我们开发了一个物料平衡模型,以帮助研究回路单元性能、安装改造的影响以及输入物料对回路性能的影响。对输入材料进行了批量研磨试验,使用高分辨率激光衍射测量法测量粒度分布与时间的函数关系。测试数据与破碎和选择功能模型以及累积率模型相匹配。在破碎和选择功能模型的基础上开发了一个回路质量平衡模型,因为该模型对大多数材料的批次数据显示出更好的拟合效果。回路模型还包括一个磨机模型和各分级阶段的模型。在流程表的不同位置对回路进行了取样,结果显示与模型计算结果的总体吻合度较高。模型和观察结果之间的差异得到了强调,并讨论了建模技术和取样方面的改进。
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来源期刊
Minerals Engineering
Minerals Engineering 工程技术-工程:化工
CiteScore
8.70
自引率
18.80%
发文量
519
审稿时长
81 days
期刊介绍: The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.
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