Browsing by Subject "HPGR"

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Access status: Open Access ,
Analiza zmian obciążenia materiału w strefie zgniotu pras walcowych
(Wydawnictwa AGH, 2009) Naziemiec, Zdzisław; Saramak, Daniel
Proper determination of real pressing force in HPGR is especially essential from the viewpoint of lime industry as well as fine and filler aggregates production. Too excessive pressing forces often results in production of lower quality products. Two methods of determination the real pressing force in HPGR were presented in the article. First one takes into consideration geometrical changes in the volume of press's compression zone, while the second is connected with the gap's width.
Access status: Open Access ,
Główne aspekty rozdrabniania twardych surowców mineralnych w wysokociśnieniowych prasach walcowych
(Wydawnictwa AGH, 2009) Gawenda, Tomasz
The high pressure grinding rolls (HPGR) of third generation are ones of the most modern devices and are often applied in new designed mineral processing plants in the whole world. Furthermore, they replace older crushers working on secondary comminution stages and mills on first grinding stages, being the source of high profits, mainly by energy savings, lower exploitation costs and higher quality of products. Sometimes, they totally replace mills, both by production of mineral flours and ores directed to beneficiation process. In the introduction to the main part of the paper, the main problems relied to exploitation of older grinding rolls types, as well the signification and application of the new ones were presented. The second chapter contains the discussion over the construction, rule of working and course of the comminution process in HPGR and the third one shows the benefits occurring from their applications on the basis of certain technological systems.