Development of a Novel Grinding Process to Iron Ore Pelletizing through HPGR Milling in Closed Circuit

Thomazini, Anderson D.; Trés, Eduardo Poltronieri; Macedo, Francisco de Assis Dutra; Athayde, Maycon; Bueno, Gilvandro; Fernandes, Rodrigo Boyer; Nunes, Rossano Augusto Pilon

doi:10.1007/s42461-020-00202-z

Cited by 2 publications

(4 citation statements)

References 8 publications

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“…Saija et al studied waterless operations from mine to mill [10]. Anderson et al considered a new grinding process that only uses HPGR as the regrinding stage after concentration [11]. According to the above description, the grinding characteristics of ore have been completely studied by experts and scholars.…”

Section: Introductionmentioning

confidence: 99%

Study on Quantitative Separation Method of Grinding Characteristics of Multi-Component Complex Ore

Yang

et al. 2023

Minerals

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Based on batch grinding method and normalization idea, a conical ball mill is used and a quantitative separation method of grinding characteristics of multi-component complex ore is proposed. The results show that the feed sizes of polymetallic complex ore have an obvious influence on the particle size distribution of intermediate grinding products in the early stage of grinding. However, the influence of the feed size is relatively insignificant on the particle size distribution of intermediate grinding products in the middle and late grinding stages. The grinding product t10 is negatively correlated with the feed sizes of ore when the grinding force is applied to the ore. At the same time, it has a simple positive linear relationship with the grinding time. The contribution rates of component minerals pyrrhotite, sphalerite and quartz to the grinding characteristics of the ore are 28.64%~37.74%, 39.93%~51.84%, 16.07%~28.39%, respectively. Therefore, the order of contribution of component minerals to the grinding characteristics of ore is sphalerite > pyrrhotite > quartz. The results provide new insights for the subsequent study of grinding characteristics of multi-component complex ores.

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Section: Introductionmentioning

confidence: 99%

Study on Quantitative Separation Method of Grinding Characteristics of Multi-Component Complex Ore

Yang

et al. 2023

Minerals

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“…Comminution machines that rely on confined bed breakage, namely high-pressure grinding rolls (HPGR) and the vertical roller mill (VRM), have gained great popularity in the cement industry [1][2][3][4][5][6][7] and, in the case of the HPGR, also in the minerals industry [8][9][10][11][12][13]. Their main advantages include good energy efficiency, high throughput, and ability to operate in size reduction operations from secondary crushing down to fine grinding.…”

Section: Introductionmentioning

confidence: 99%

“…One particularly successful application of confined bed breakage is the HPGR in association with ball milling in either pregrinding or regrinding of iron ore concentrates for pellet feed production [8,13]. The present work investigated breakage of iron ore concentrates in confined conditions in single and multiple pressings in a piston-and-die apparatus with the aim of identifying the onset of saturation during confined breakage.…”

Section: Introductionmentioning

confidence: 99%

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Confined Bed Breakage of Fine Iron Ore Concentrates

2020

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High-pressure grinding rolls (HPGR) have gained great popularity in the mining industry in the last 25 years or so. One of the first successful applications of the technology has been in iron ore pressing prior to pelletization. Piston-and-die tests can provide good insights on the material response in an HPGR. This work analyzed confined bed breakage of four iron ore concentrates under different conditions. Saturation in breakage of particles contained in the top size in the tests was observed to occur at specific energies of about 2 kWh/t, whereas full saturation in breakage, with no additional increase in specific surface area of the material, occurred at energies above about 6 kWh/t. An expression was proposed to characterize the propensity of a material to break under confined bed conditions. The phenomenology involved in confined bed breakage of such materials was then analyzed in light of the results.

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Development of a Novel Grinding Process to Iron Ore Pelletizing through HPGR Milling in Closed Circuit

Cited by 2 publications

References 8 publications

Study on Quantitative Separation Method of Grinding Characteristics of Multi-Component Complex Ore

Study on Quantitative Separation Method of Grinding Characteristics of Multi-Component Complex Ore

Confined Bed Breakage of Fine Iron Ore Concentrates

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