Naslov
Suspension rheology during wet comminution in planetary ball mill

Autori
Matijašić, Gordana ; Žižek, Krunoslav ; Glasnović, Antun

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
11th European Symposium on Comminution, CD / - Budimpešta, 2006, 1-6

Skup
11th European Symposium on Comminutio

Mjesto i datum
Budimpešta, Mađarska, 09.10.2006. - 12.10.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
planetary ball mill; suspension rheology; wet comminution

Sažetak
Controlling or obtaining desired suspension behavior in terms of rheology is important issue in many engineering problems. This research monitors rheological behavior of dolomite suspensions produced by wet comminution in planetary ball mill. Dolomite has a number of uses, in agriculture, steelmaking, glass making, ceramic industry, pharmaceutical industry etc. therefore it is very interesting for investigation. Material was ground at different volume fractions (20, 30, 40 and 50 vol % of solid) using water as liquid medium. Best results, expressed in terms of derived median size (d50) were obtained with 40 vol% of solid. Therefore, further research was carried out using such suspensions. Twelve dolomite size fractions (from 75 to 3350 m) were ground separately in planetary ball mill at 200 rpm. Rheological behavior of attained suspensions was characterized as strongly pseudoplastic. The degree of pseudoplasticity was connected to particle size distribution. Rheological properties of the product become equal after the effective time regardless of primary particle properties before comminution. That at the same time proves that the comminution in a highly energetic mill will lead, after a short time, to development of systems with the same granulometric and, therefore, the same rheological properties regardless of the primary system properties before the comminution.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA