target fragmentation for efficient loading and crushing

target fragmentation for efficient loading and crushing

Crushing The model used is that developed by Whiten (1974) and subsequently modified by Andersen (1988). Conceptually it is described in Figure 1 and, given that the crushing action of jaw and gyratory crushers is similar (Figure 2), can be used for both devices. Feed is considered to undergo a series of breakage and classification Crusher and Mill Modelling Crushing The model used was that developed by Whiten (1974) and subsequently modified by Andersen (1988). Conceptually it is described in Figure 3 and, gven that the crushing action of jaw and gyratory crushers is similar, can be used for both devices. Feed is considered to undergo a series of

optimization of primary gyratory crushing at highland

optimization of primary gyratory crushing at highland

zHammer, Drill and Blast, or Drop Ball. zLift again and hauled off to the crusher. zUsed as safety berm for ramps and benches and inventoried for future use. zRemember hammer rock alone is a uniformly coarse fragmentation. It runs at a much reduced rate through the primary Ahafo operate a 54 x 75 in gyratory crusher for primary ore and a toothed MMD sizer for oxide ... with calibrated models of blast fragmentation, crushing and grinding circuits being used to generate a list ... vibration and excavator digging rate. A series of validation trials were then conducted in

break it better mine blast fragmentation international

break it better mine blast fragmentation international

The data was used to build site specific models for blast fragmentation, primary crushing, and SAG and ball milling. ... reduced to minus 150 mm size material in a single pass through a gyratory crusher to produce a SAG mill feed. ... SAG Mill Breakage Rates 100 SAG Feed Size Distributions 100 90 Survey 1 80 Cum. Wt% Passing Survey 2 Breakage ... GYRATORY CRUSHER Advantages Designed for direct dump from trucks Lowest maintenance per ton processed of any designed crusher Can handle crushing ore hardness up to 600 mPa Easy handling of tramp material with hydraulic reiief system Disadvantage Highest installed capital cost of

conventional blasting ore vs mechanised ore

conventional blasting ore vs mechanised ore

Table 2 - Observed vs Predicted Performance of the Primary Grinding Circuit Observed Predicted Feed Rate (t/hr) 1250 1250 Feed F80 (mm) 130 118 Trommel undersize 80 (mm) 3.06 3.21 Recycle crusher feed rate (t/hr) 276 345 Recycle crusher P80 (mm) 15.0 15.5 Mill filling (%) 29.5 30 Mill power (kW) 12717 12750 Simulating Changes in Blast Design ... This thesis presents the work done in a collaborative research project between the University of British Columbia and Highland Valley Copper. The research was aimed at understanding gyratory crusher liner wear in the overall context of the crushing process. Wear measurements were taken for in-service crushers during the research period using a novel laser profile measurement device. Data from ...

of blasting and crushing machine

of blasting and crushing machine

Compare Gyratory Crusher Vs Jaw Crusher. To accomplish this reduction in size takes several steps or stages of crushing and grinding primary crushing is the first of these stages generally speaking there are two types of primary crushers lets compare them gyratory crusher or a jaw crusher although they dont look anything like they do have similarities that put them into the same class of ... Aug 24, 2017 A crusher constantly fed with large blocks might negatively impact the crushing performance (production rate, energy consumption or wear

v117n11a10 target fragmentation for efficient loading

v117n11a10 target fragmentation for efficient loading

Sep 01, 2011 Blast fragmentation has far-reaching effects on the performance of equipment and processes throughout the mine. Fragmentation affects the looseness or diggability of the bench face, which influences excavation efficiency, while the throughput and energy costs of primary crushers are directly related to the input feed rock sizes. FRAGMENTATION Controlling fragmentation Stuart Thomson* explains how this improves productivity and environmental performance with some innovative new Orica products Image 1 Considerable advances have been made in fragmentation. The image is of a muckpile, with the left half of the blast loaded with a commonly used bulk explosive and the

effects fragmentation crushers

effects fragmentation crushers

Jul 01, 2010 The trend to installing larger pebble crushers capable of crushing up to 70-100 percent of the new feed rate has been observed. The improvements in SAG Ahafo operate a 54 x 75 in gyratory crusher for primary ore and a toothed MMD sizer for oxide ... with calibrated models of blast fragmentation, crushing and grinding circuits being used to generate a list ... vibration and excavator digging rate. A series of validation trials were then conducted in

pdf modelling fines in blast fragmentation and its

pdf modelling fines in blast fragmentation and its

Dec 16, 2020 This class of crusher historically has been used on the strongest ores. Crushing is accomplished by relatively slow moving members exerting very high force levels. Understandably, these crushers are typically very big, very strong, and heavy. Gyratory Crushers. Figure 1 shows a simplified section of a typical gravity fed gyratory crusher ... Dec 12, 2018 Crushing work index. n Blast geometry constant. N Number of blast hole. P 50 Mean fragmentation size. P 80 80% passing size. p e Price of ANFO. P max Maximum particle size. Q e Required amount of ANFO. R Maximum allowable feed size of crusher. r D Drill rate. S Spacing. S e Relative weight strength of explosive to ANFO. t c Truck ...

explain how hardness affect gyratory crusher

explain how hardness affect gyratory crusher

This thesis presents the work done in a collaborative research project between the University of British Columbia and Highland Valley Copper. The research was aimed at understanding gyratory crusher liner wear in the overall context of the crushing process. Wear measurements were taken for in-service crushers during the research period using a novel laser profile measurement device. Data from ... Primary crusher products were then collectively weighed and recorded then used as feed material for the secondary crushing unit operation. The fragmentation operation was done via a small long shaft laboratory gyratory device having size range 63.5 711 mm, set range 25.4 44.5 mm, rotational speed (rev/min) at 700 and finally power draw ...

300 tph cone crusher rates download list

300 tph cone crusher rates download list

GYRATORY CRUSHER Advantages Designed for direct dump from trucks Lowest maintenance per ton processed of any designed crusher Can handle crushing ore hardness up to 600 mPa Easy handling of tramp material with hydraulic reiief system Disadvantage Highest installed capital cost of Compare Gyratory Crusher Vs Jaw Crusher. To accomplish this reduction in size takes several steps or stages of crushing and grinding primary crushing is the first of these stages generally speaking there are two types of primary crushers lets compare them gyratory crusher or a jaw crusher although they dont look anything like they do have similarities that put them into the same class of ...

impact of rock fragmentation on crusher

impact of rock fragmentation on crusher

comparing the BMM system against the conventional polypipe technique Polypipe had a poor recovery rate with 36 vs 93 for the BMMs and therefore post-blast ore... AutoStem 14 Target fragmentation for efficient loading and crushing the Aitik case. The results indie ore hardness is most influential in midrange fragmentation with a marginal effect in coarser fragmentations A gyratory crusher was observed for 20 days and digital images of the crusher feeder were used to assess the fragmentation of each truck cycle both quantitatively and qualitatively The results indie ...

rate of mini crushers in india

rate of mini crushers in india

Crushing Products Size and Shape What to . 26/02/2016 The Fairmount crusher is inherently a somewhat cleaner breaking machine than either the standard gyratory or standard jaw types, but the class of rock for which the former crusher is largely used is usually subject to greater than average degradation during the blasting and loading operations in the quarry, which tends to level out the energy consumption of gyratory crushers by using CSS and feed size variations. However, the feed fragmentation in this model is based on the Kuz-Ram model (Cunningham, 1983) and is assumed to be a function of burden and spacing, regardless of all other factors affecting blast fragmentation. In reality, it is well known that blast-induced ...

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