Title

ASPECTS OF HPGR IN IRON ORE PELLET FEED PREPARATION

Aspects of HPGR in Iron Ore Pellet Feed Preparation

Authorship

Meer, Frank Peter van der; Leite, Israel Aquilar

Meer, Frank Peter van der

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Leite, Israel Aquilar

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DOI

10.5151/2594-357X-31516

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Abstract

"High Pressure Grinding is applied in iron ore pellet feed preparation to generate a specific surface area increase. The technology is applied for final grinding of fine concentrates or pre-grinding (ahead of conventional milling) of particles. The process assumes inter-particle breakage and inter-particle abrasion as a major factor in generation of fines which contribute to an effective increase in Blaine specific surface area. Process parameters and material conditions such as moisture and particle size composition can be critical, especially at higher Blaine values of the concentrate. As alternative to classification, a multi-pass system or closed circuit operation for HPGR can be established by product recycling, where a proportion of the HPGR discharge is recirculated to achieve a finer final discharge product for subsequent pelletizing. In the scope of this paper, effects of parameters and conditions in HPGR feed on efficiency of the compression are highlighted. Sample preparation for Blaine analysis is discussed in view of standardizing and exchange of process results, especially in view of breaking of fine particle agglomerates and HPGR flakes. "

"High Pressure Grinding is applied in iron ore pellet feed preparation to generate a specific surface area increase. The technology is applied for final grinding of fine concentrates or pre-grinding (ahead of conventional milling) of particles. The process assumes inter-particle breakage and inter-particle abrasion as a major factor in generation of fines which contribute to an effective increase in Blaine specific surface area. Process parameters and material conditions such as moisture and particle size composition can be critical, especially at higher Blaine values of the concentrate. As alternative to classification, a multi-pass system or closed circuit operation for HPGR can be established by product recycling, where a proportion of the HPGR discharge is recirculated to achieve a finer final discharge product for subsequent pelletizing. In the scope of this paper, effects of parameters and conditions in HPGR feed on efficiency of the compression are highlighted. Sample preparation for Blaine analysis is discussed in view of standardizing and exchange of process results, especially in view of breaking of fine particle agglomerates and HPGR flakes. "

Keywords

HPGR; Pellet Feed; Blaine; Agglomeration

HPGR; Pellet Feed; Blaine; Agglomeration