Product size distribution and energy expenditure in grinding minerals and ores in high pressure rolls

The effects of feed size distribution on confined-bed comminution of quartz and calcite in piston-die press

“…However, there is some deviation from self-similarity at the coarse end of the size-normalized distributions. Similar deviations from self-similarity at the coarse size end were observed by previous researchers (Fuerstenau et al, 1991(Fuerstenau et al, , 1996Lim et al, 1996) for narrowly-sized feeds. Lim et al (1996) explained this observation by the feed size boundary effect saying that "the maximum normalized product size is limited by the initial feed top size."…”

“…The intercept e should be unity because with zero input energy there should be no size reduction and no change in the feed median size. Lim et al (1996) further examined the concept of self-similarity and applicability of Eq. (1) for a range of narrowly-and widely-sized feeds of minerals and ores comminuted in high-pressure rolls.…”

Investigation of microcrack formation in vanadium-titanium magnetite using different crushing processes

“…In order to further investigate the influence of the microcracks generated during comminution on the grinding process, grindability tests were carried out on the -3.2 mm and -3.2+0.074 mm size fractions from the different crushed products (Figure 11). The analysis of the grinding kinetics (Lim, 1996) was conducted using Equation [1]:…”

Role of feed moisture in high-pressure roll mill comminution

“…Reported findings do not agree with each other. Some authors report that the moisture content of the feed does not appear to affect the reduction ratiospecific energy relationship (Lim et al, 1996). On the other hand, others confirm that there are some effects of feed moisture on the performance of the HPRM (Patzelt, 1990;Schoenert et al, 1990;Fuerstenau et al, 1993).…”