Vertical mill simulation applied to iron ores

Abstract

j m a t e r r e s t e c h n o l . 2 0 1 5;4(2): [186][187][188][189][190] w w w . j m r t . c o m . b r Scale-upVertical mill Iron ore a b s t r a c tThe application of vertical mills in regrind circuits is consolidated. This type of mill is now attracting interest in primary grinding applications, due to its higher efficiency when compared to ball mills, which are usually used at this stage. In this study, a coarse sample of iron ore was tested in a pilot scale grinding circuit with a vertical mill. Other three samples of pellet feed had already been tested with the methodology used in this study. The sample of coarse iron ore was characterized in laboratory tests carried out in a small batch ball mill. Selection and breakage function parameters were determined from the laboratory tests. The parameters were then used for simulating the pilot scale tests using Modsim TM software. The model previously implemented in Modsim TM has been successfully applied to represent the vertical mill operated with different ores. The simulations produced particle size distributions that were very close to the actual size distributions, and the predictions were accomplished only by imputing the calibrated parameters from the batch tests, the power draw and the feed size distribution of the pilot tests. The methodology is therefore useful for scale-up and simulation of vertical mills, only requiring laboratory tests that can be carried out in standard laboratory batch ball mills with small amounts of samples.

On fault feature extraction and diagnosis of vertical mill

“…Vertical mill is a large-scale powder equipment commonly used in the industrial building materials industry. Vertical grinding plays an important role in improving the production efficiency of enterprises [1]. And vertical mills usually work in low-speed heavy-duty, high-noise environments.…”

Process modelling of gravity induced stirred mills

“…However, this phenomenon was not significant for Cu-Au due to its higher hardness. Mazzinghy et al (2015b) also had the similar result while grinding iron ore in a pilot Vertimill. In the batch gravity induced stirred mill, though a greater number of breakage sites are available when using the smaller grinding media, they don't necessarily result in breakage as smaller grinding media could not generate the minimum threshold energy to initiate breakage.…”