Confined Bed Breakage of Fine Iron Ore Concentrates
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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/10/8/666 |
| _version_ | 1797561207631118336 |
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| author | Túlio M. Campos Gilvandro Bueno Luís Marcelo Tavares |
| author_facet | Túlio M. Campos Gilvandro Bueno Luís Marcelo Tavares |
| author_sort | Túlio M. Campos |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T18:11:49Z |
| format | Article |
| id | doaj.art-2b0d10aee69d42e092736a707404b000 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T18:11:49Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-2b0d10aee69d42e092736a707404b0002023-11-20T08:02:10ZengMDPI AGMinerals2075-163X2020-07-0110866610.3390/min10080666Confined Bed Breakage of Fine Iron Ore ConcentratesTúlio M. Campos0Gilvandro Bueno1Luís Marcelo Tavares2Department of Metallurgical and Materials Engineering, Universidade Federal do Rio de Janeiro–COPPE/UFRJ, Cx. Postal 68505, Rio de Janeiro CEP 21941-972, RJ, BrazilDepartment of Metallurgical and Materials Engineering, Universidade Federal do Rio de Janeiro–COPPE/UFRJ, Cx. Postal 68505, Rio de Janeiro CEP 21941-972, RJ, BrazilDepartment of Metallurgical and Materials Engineering, Universidade Federal do Rio de Janeiro–COPPE/UFRJ, Cx. Postal 68505, Rio de Janeiro CEP 21941-972, RJ, BrazilHigh-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.https://www.mdpi.com/2075-163X/10/8/666bed breakageiron orecomminutionsaturationpiston-and-diecompaction |
| spellingShingle | Túlio M. Campos Gilvandro Bueno Luís Marcelo Tavares Confined Bed Breakage of Fine Iron Ore Concentrates Minerals bed breakage iron ore comminution saturation piston-and-die compaction |
| title | Confined Bed Breakage of Fine Iron Ore Concentrates |
| title_full | Confined Bed Breakage of Fine Iron Ore Concentrates |
| title_fullStr | Confined Bed Breakage of Fine Iron Ore Concentrates |
| title_full_unstemmed | Confined Bed Breakage of Fine Iron Ore Concentrates |
| title_short | Confined Bed Breakage of Fine Iron Ore Concentrates |
| title_sort | confined bed breakage of fine iron ore concentrates |
| topic | bed breakage iron ore comminution saturation piston-and-die compaction |
| url | https://www.mdpi.com/2075-163X/10/8/666 |
| work_keys_str_mv | AT tuliomcampos confinedbedbreakageoffineironoreconcentrates AT gilvandrobueno confinedbedbreakageoffineironoreconcentrates AT luismarcelotavares confinedbedbreakageoffineironoreconcentrates |