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SAG Mill Liner Design 911 Metallurgist

06/06/2016· Experience to date on mills ranging from 5.5 m (18 ft.) diameter to 11.0 m (36 ft.) diameter shows that capacity is equal or greater than with conventional lining at the same unit power consumption. Fully Autogenous Grinding (FAG) Mills End and

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sag mill grate slot size sanbao-site

03/05/2021· Optimizing your SAG mill operation International Mining. Mar 21, 2007 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

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SAG MILLS OPTIMIZATION: IMPLEMENTATION AND EVALUATION

Trommel's Dimension Slot Size Pulp Lifters and Cone Discharge of SAG Mills • Size of SAG Grate: 64 mm • The short directors is near to medium directors • Strangulation of 95 mm 697 mm 307 mm 674 mm 350 mm Cone discharge of SAG 1011 95 mm 298 mm 503 mm Material: Polyurethane Material: Rubber with ceramics . Charge Baffle in SAG 1011 Trunnion-Trommel. Charge Baffle in SAG 1011

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How a Grate Discharge Ball Mill Works 911 Metallurgist

13/08/2015· Here I try to explain how ground slurry is discharged from a grate ball mill (or SAG). How it works is, The slots in the early grates were designed around the traditional types found in proven concepts of metal grates. Typically a slot (fig. 2) was designed with a selected rectangular, circular or square opening and then tapered out in all directions to release oversize material. The

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INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV

estimated utilising the SAG mill grate size and discharge screen aperture sizes and the Rosin-Rammler size distribution function, which has been selected for its convenience and since it “has been found to fit many size distributions very well” (Napier-Munn et al.,1996). SAG Mill Discharge, SMDC/smdc The SAG mill discharge properties (SMDC) and size distribution (smdc), including the

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Optimizing your SAG mill operation International Mining

21/03/2007· 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. The amount of pebbles passing through the

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Optimizing your SAG Mill Mining Surplus

02/03/2010· 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. The amount of pebbles passing through the

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SAG MILLS OPTIMIZATION: IMPLEMENTATION AND EVALUATION IN

Trommel's Dimension Slot Size Pulp Lifters and Cone Discharge of SAG Mills • Size of SAG Grate: 64 mm • The short directors is near to medium directors • Strangulation of 95 mm 697 mm 307 mm 674 mm 350 mm Cone discharge of SAG 1011 95 mm 298 mm 503 mm Material: Polyurethane Material: Rubber with ceramics . Charge Baffle in SAG 1011 Trunnion-Trommel. Charge Baffle in SAG

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INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV

estimated utilising the SAG mill grate size and discharge screen aperture sizes and the Rosin-Rammler size distribution function, which has been selected for its convenience and since it “has been found to fit many size distributions very well” (Napier-Munn et al.,1996). SAG Mill Discharge, SMDC/smdc The SAG mill discharge properties (SMDC) and size distribution (smdc), including the

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Operation of SAG Mills,Principle Operation of Semi

The 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 the mill longer because it is unable to pass

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SAG Mill Ball Size Evaluator Evaluation Factors

08/09/2013· The SAG Mill has a “small” circulation load of oversize given be the 3/8″ trommel screen and the 1/2″ x 1 1/4″ discharge grates. The load of 4″ balls in this SAG is “good” but un-measured. SAG Ball consumption is “average” at 400 g/t while Ball Mill grinding media (3″ balls) usage in 550 g/t.

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Optimizing your SAG Mill Mining Surplus

02/03/2010· 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. The amount of pebbles passing through the

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Improved Relationships for Discharge in SAG/AG Mills

of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from literature lacks knowledge of mill content size distribution and its effect on discharge through the grate at various aperture sizes and radial positions. It also indicates that in order to advance the understanding in a meaningful way, a more mechanistic approach must be taken to modelling these principles

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SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING

We don’t feel that the feed size to the trommel should be greater than about two inch. We currently use a 1-inch grate in the mill that wears out to probably 1-1/4-inch. We’ve had 2-inch grates in the mill and we’ve even had 2-1/2-inch grates just to see what they would do when we wanted to measure the circulating load. Our circulating

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Improving Autogenous/Semi-Autogenous Grinding Performance

grate slots, they get an equal chance to go back into the mill as illustrated in discrete element method (DEM) simulation of 36 ft SAG mill pulp lifters shown in Figure 5. Solid particles and coarse pebbles also flow-back through the grates along with the slurry. While flow-back of slurry leads to pool formation, flow-back of pebbles increases the quantity of critical size material in the mill

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Overflow VS Grate Discharge Ball or Mill Why Retrofit

24/06/2015· The discharge end of the Grate Discharge Ball Mill has at least ten times the discharge opening area, through the grate slots, compared to the common trunnion overflow type mill. The discharge grates are designed to run clean and free of any blinding or choking. The pulp level in the mill may be varied by merely changing the pulp dilution. There is no complicated mechanical arrangement

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Taking Control of the Mill Feed R2 Orway

The effect of feed size in AG/SAG milling has been studied extensively with an early review presented by Abel (1997), whilst the relationship between changes in feed size and comminution has been covered by a number of authors under the banner of “Mine to Mill” (Morrell and Kojovic, 1999). The present case study relates to the Mt Rawdon Gold Mine, owned and operated by Equigold NL and

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sag mill grate designsag mill grate slot size

Sag Mill Grate Designsag Mill Grate Slot Size Dry Mill Grinder Panasonic How To Install A Ffe Trunnion Of A Sag Mill Ball And Sag Mill Circuits processing plant using dry aerofall sag mill. SAG mills are primarily used at gold, copper and platinum mines with . SAG Mill. Dry grind type. 13 ft. 6 in. (4.2 m) dia. 4 ft. (1.2m) long. 300 hp motor. grate open area in sag mills mexican-design

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SAG MILLS OPTIMIZATION: IMPLEMENTATION AND EVALUATION IN

Trommel's Dimension Slot Size Pulp Lifters and Cone Discharge of SAG Mills • Size of SAG Grate: 64 mm • The short directors is near to medium directors • Strangulation of 95 mm 697 mm 307 mm 674 mm 350 mm Cone discharge of SAG 1011 95 mm 298 mm 503 mm Material: Polyurethane Material: Rubber with ceramics . Charge Baffle in SAG 1011 Trunnion-Trommel. Charge Baffle in SAG

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Optimizing your SAG Mill Mining Surplus

02/03/2010· 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. The amount of pebbles passing through the

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SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING

We don’t feel that the feed size to the trommel should be greater than about two inch. We currently use a 1-inch grate in the mill that wears out to probably 1-1/4-inch. We’ve had 2-inch grates in the mill and we’ve even had 2-1/2-inch grates just to see what they would do when we wanted to measure the circulating load. Our circulating

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Discharge Grates Polycorp

The rubber grates have tapered slots to minimize the plugging with near size particles. Rubber / PolyStl™ grates are extensively used in AG / SAG and Primary ball mills. Polycorp regularly supplies rubber and PolyStl™ grates for mills up to 40 ft in diameter. PolyStl™ Grates. PolyStl™ Grates are suitable for AG / SAG mill applications and are manufactured with specialized high wear

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(PDF) Optimisation of the Sossego SAG mill Mauricio

Since early 2005 increasing the open area and slot aperture in order to reduce the the powder factor has been increased, particularly in domains of high accumulation of pebble size material in the SAG mill charge. Table 3 competent ores. New drilling equipment has also been incorporated to shows in the next page the developments in discharge grate the mine thus giving more possibilities to

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Taking Control of the Mill Feed R2 Orway

The effect of feed size in AG/SAG milling has been studied extensively with an early review presented by Abel (1997), whilst the relationship between changes in feed size and comminution has been covered by a number of authors under the banner of “Mine to Mill” (Morrell and Kojovic, 1999). The present case study relates to the Mt Rawdon Gold Mine, owned and operated by Equigold NL and

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Parameters Optimization SAGmill 40x26pressed

14/07/2015· SAG MILL: • The CHINALCO mining, has the SAG mill with a design capacity of 5,250 tons per hour based on 93% availability. • The plant is designed to operate 24 hours a day, 365 days a year. • We need to detect, measure and correct the problems that cause poor discharge (amount) of mineral in the SAG mill. 3. Definir Planteamiento del proyecto C D M A I 6σ ISSUE VOC (Voice of

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TECHNICAL NOTES 8 GRINDING R. P. King

LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the conical ends. ! c is the specific gravity of the

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Metso Mill Grates Help Boost Production at Codelco E & MJ

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