SAG Mill Liner Design Mineral Processing & Metallurgy. To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered.SAG Mill Liner Design Mineral Processing & Metallurgy,2016-6-6 · Bolt size. A 38 mm (1.5 in.) Grade 5, or Grade 8 (high strength) bolt is sufficient to fasten liners provided the spacing recommended above is followed. Extra liner holes not used to fasten liners can be used as “knockout holes” for worn liner removal. Mill reversibility for reduced liner scrap loss and balanced wear. Some fully autogenous mill
2015-8-13 · Our design or what we like to refer to as a “funnel type slot” was developed to take advantage of the characteristics of rubber (fig. 3). In cross section the slot design Slurry flow in mills: grate-only discharge mechanism ,2003-7-1 · Moys (1986) used a 0.54 × 0.83 m pilot mill to investigate the effect of grate design and reported that the grate design, solids concentration and feed rate have a significant influence on hold-up. However, it was not clear whether the open area or the hole position influenced the hold-up as they were changed simultaneously in his experiments.
2003-7-1 · Influence of open area on discharge rate through the grate-only and grate-pulp lifters with medium size radial pulp lifter (MRPL): (a) grate-only discharge and (b) grate-pulp lifter discharge. However, with the pulp lifters fitted, the discharge rate was found to marginally decrease up to 7.05% open area and then remained constant with further increase in open area ( Fig. 12b ).Slurry flow in mills with TCPL — An efficient pulp lifter,2006-6-1 · Considering the shortened mill length (from 3.66 to 3.48 m), smaller grate hole size (from 26.8 to 18.5 mm) and reduced grate open area (from 10.47% to 8.16%), the load volume is expected to be more than the pre-installation condition for the same feed rate.
2015-4-1 · Axial mill inside particle size distributions indicated that, particles coarser than the discharge diaphragm slot and grate opening dimensions were ground in the first meters of the mill length in single compartment type mills. Significant coarse particle accumulation did not take place at the end of the mill.Fruitful Mill Grates Help Boost Production at Codelco ,2020-4-8 · Discharge grates are designed to retain oversize material and balls in the mill, while allowing slurry and pebbles to move on. In 2015, El Teniente claimed record commercial production of more than 71,000 tons of fine copper at one of the industry’s lowest cost levels. An increase in slot size and operational stability increased throughput by 7%.
2014-12-18 · Trommel's Dimension Slot Size • Trommel of 40 feet SAG mill of Collahuasi has an high value of α = 172 m 3/h/m 2. Open Pulp Free Flow by Free Pulp Lifters and Cone Discharge of SAG Mills • Size of SAG Grate: 64 mm • The short directors is near to medium directors • Further, empirical and semi-empirical approaches have ,AG/SAG mill In order to build a model and define the laboratory scale experiments, function of grate configuration. Slot size, position, and total open area control the passage of slurry,
2010-3-2 · Similar to slurry flow-back, the pebbles flowing back into the mill increase with larger pebble port or grate slot size. As the pebbles flow down and slide across the grate slots, they get an equal chance to go back into the mill. Similar to slurry pool formation, pebbles flow-back would increase the quantity of critical size material in the mill.Effects of ore characteristics on product shape ,2012-5-1 · The size distribution of the SAG mill products is similar in large-size ranges whereas it fairly becomes different in smaller size fractions (i.e. smaller than 2000 μm). Despite the mill in the Survey-2 operated using coarser feed and larger grate slot, the product of Feed 2 is finer than that of Feed 1.
2006-6-1 · Considering the shortened mill length (from 3.66 to 3.48 m), smaller grate hole size (from 26.8 to 18.5 mm) and reduced grate open area (from 10.47% to 8.16%), the load volume is expected to be more than the pre-installation condition for the same feed rate.Minerals Free Full-Text Optimizing Performance of ,The initial design of the grate section caused a serious accumulation of pebbles within the SAG mill which contributed to a decreased grinding efficiency. The grates were designed with 18 inner sections, with a 25 mm grate slot width, and 18 outer sections, with only four sections having pebble ports (slot width of
2013-12-22 · SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING the mill from the grates in the slot between the grates and the head. The oversize falls into a bucket wheel on the discharge end of the trommel, gets picked up as the trommel currently use a 1-inch grate in the mill that wears out to probably 1-1/4-inch. We’ve hadIMPROVING ENERGY EFFICIENCY VIA OPTIMIZED ,2020-1-19 · ore entering through the feed port is ground by this field and, after being sufficiently ground to the grate slot size, the slurry leaves through the slots in the grate. The field of breakage influences the rock mass in the SAG mill. Should the incoming ore be harder and the field of breakage insufficient to reduce the size, the ore stays in
SAG mill throughput as a function of grate open area As shown in Figure 2 the grate open area has a strong effect on Sossego SAG mill throughput. The nominal capacity of the circuit should be achieved with a combination of 13.5% ball charge and 10.8% open area with 3 and 3.5 inch apertures.A laboratory study of the performance characteristics ,1997-11-1 · I,, I I 10 12 14 16 18 20 22 24 Net mill hold-up (% vol) Fig.13a Performance of pulp lifters at a given mill hold-up Performance characteristics of mill pulp lifters 1243 25 &S is TEST CONDITIONS PL Size : 6.8% C.Speed : 70% ] O.Area : 10% I Grate-only 10 12 14 16 18 20 22 24 Net mill hold-up (% vol) Fig.13b Influence of pulp lifter
2014-12-18 · Trommel's Dimension Slot Size • Trommel of 40 feet SAG mill of Collahuasi has an high value of α = 172 m 3/h/m 2. Open Pulp Free Flow by Free Pulp Lifters and Cone Discharge of SAG Mills • Size of SAG Grate: 64 mm • The short directors is near to medium directors • Effects of ore characteristics on product shape ,2012-5-1 · The size distribution of the SAG mill products is similar in large-size ranges whereas it fairly becomes different in smaller size fractions (i.e. smaller than 2000 μm). Despite the mill in the Survey-2 operated using coarser feed and larger grate slot, the product of Feed 2 is finer than that of Feed 1.
The initial design of the grate section caused a serious accumulation of pebbles within the SAG mill which contributed to a decreased grinding efficiency. The grates were designed with 18 inner sections, with a 25 mm grate slot width, and 18 outer sections, with only four sections having pebble ports (slot width of SAG MILL DISCHARGE SCREENS-TROMMEL vs. ,2013-12-22 · SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING the mill from the grates in the slot between the grates and the head. The oversize falls into a bucket wheel on the discharge end of the trommel, gets picked up as the trommel currently use a 1-inch grate in the mill that wears out to probably 1-1/4-inch. We’ve had
SAG mill throughput as a function of grate open area As shown in Figure 2 the grate open area has a strong effect on Sossego SAG mill throughput. The nominal capacity of the circuit should be achieved with a combination of 13.5% ball charge and 10.8% open area with 3 and 3.5 inch apertures.Comminution Model Types 911 Metallurgist,2018-8-10 · A single size category, typically 80% passing, is used in order to simplify the equations. for use in simulating and optimizing SAG mill discharge grates and pulp discharge lifter systems. is notoriously difficult to predict with current tools meaning that operators have to experiment with different grate percentage open area and slot
2020-1-19 · 6 6 Feed Trunnion Mill Shell Grate Pulp Lifter Discharge Trunnion Figure 1.1: Schematic of a typical SAG mill. 1.1.1 Field of breakage: The motion of charge or rocks and balls in SAG mils can be viewed as a field of breakage generated as a result of the internal profile of the lifters and the rotational speed of the mill shell.Sag Mills Encyclopedia boatstar.es,Sag Mills Encyclopedia. Minerals free full text an lstm approach for sag mill ,results show accuracies above 80% on both sag mills at a short upcoming period of times and around of misclassifications between soft and hard characterization. the proposed application can be extended to any crushing and grinding equipment to forecast categorical attributes that are relevant to downstream processes.
2014-7-8 · An increase in slot size and operational stability has increased throughput by 7 %. Pebble production increased by 24 % during the first 50 days of operation, while the wear rate decreased from 0.26 mm/day to 0.11 mm/day. Mill availability has increased thanks to A laboratory study of the performance characteristics ,1997-11-1 · I,, I I 10 12 14 16 18 20 22 24 Net mill hold-up (% vol) Fig.13a Performance of pulp lifters at a given mill hold-up Performance characteristics of mill pulp lifters 1243 25 &S is TEST CONDITIONS PL Size : 6.8% C.Speed : 70% ] O.Area : 10% I Grate-only 10 12 14 16 18 20 22 24 Net mill hold-up (% vol) Fig.13b Influence of pulp lifter
