sag mill discharge box level measurement

Major Mines Projects Silvertip Mine
SAG mill dimensions are 18 ft dia. x 7 ft FF (flange to flange) and is equipped with a 1 000 hp motor while the ball mill is 11 ft dia. x 14 ft 7 in FF and equipped with a 900 hp motor. Coarse ore is reclaimed from the storage bin and is fed via a conveyor to the SAG mill which runs with very minimal ball charge due to over-capacity of the mill.
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A field mill for measuring atmospheric electricity
2 days ago · Further measurements were made with the field mill on 22 June 2017. A thunderstorm had been forecast so there was a possibility of variability in the earth's electric field. Figure 8Earth's electric field changes as a thunderstorm was approaching (rotor covered for periods 30–70 107–140 230–260 and 350–380 seconds).
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ABB's new Gearless Mill Drive generation Maintenance
· Ball Mill SAG Mill Figure 2 Core pressing system with spring plate/washer and re-tightening statistics in a typical installation Access to the inside of the motor and the cooling system The easier the access to the inside of the motor is the more convenient and efficient is the work on the motor.
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Wear and Failure Analysis of Semi-Autogenous Grinding Mill
· Figure 1 shows a schematic cross section of the Chadormalu iron ore complex SAG mill which consist of two rows of liners (1) feed-end shell liners and (2) discharge-end shell liners. The present case study has been conducted on these well-worn liners. The liners were replaced after comminution of 800 thousand tons of iron ore.
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Instrumentation and control of a continuous 0.6-m SAG mill
· Thus water to the pump box is manipulated to maintain a constant level so that discharge rate is constant for a particular pulley setting. Water addition lines are 3.1 cm PVC. Mill discharge is sized on a 60 cm by 90 cm Universal vibrating screen which has 0.625 cm square openings and is angled at 25 to the horizontal.
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How a Grate Discharge Ball Mill Works911 Metallurgist
· How a Grate Discharge Ball Mill Works. Here I try to explain how ground slurry is discharged from a grate ball mill (or SAG). How it works is the slurry flows across the grate as it would a screen panel. On the other side of the grate/screens are veins like a pump impeller. As the mill turns/rotates the slurry is "pumped" out and discharged.
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AMIT 135 Lesson 6 Grinding CircuitMining Mill Operator
SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing image () AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill
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Major Mines Projects Don Mario Mine
A level indicator and controller in the mill feed bin controls the apron feeder feed rate to the jaw crusher to maintain the set level in the bin. Grinding Dry crushed ore at P80 90 mm is fed to the SAG mill (5.5 m internal diameter by 2.7 m effective grinding length) by means of a conveyor belt equipped with a load cell type belt weightometer.
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SPM_Report-_sag_millCondition Monitoring the
Condition monitoring the intelligent Way SAG MILL M/C Condition Critical Machine Condition Report Machine Technical Data's ISO 10816 Classification Class-IV <7.1-Normal 7.1 to 18.0-Marginal >18.0- Critical Motor Speed. 660 RPM approximately Gear box Input Speed 660 RPM approximately Gear box output Speed 133 RPM approximately Mill Speed 8
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Evolution of SAG Mill Process Control at the Xstrata
· 445 PAPER 28 Evolution of SAG Mill Process Control at the Xstrata Nickel Raglan Operation Erik Bartsch1 Chief Engineer Guy Comeau2 Senior Metallurgist Colin Hardie3 Former Chief Metallurgist 1 Process Control Group Xstrata Process Support 6 Edison Rd Falconbridge Ontario
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How a Grate Discharge Ball Mill Works911 Metallurgist
· How a Grate Discharge Ball Mill Works. Here I try to explain how ground slurry is discharged from a grate ball mill (or SAG). How it works is the slurry flows across the grate as it would a screen panel. On the other side of the grate/screens are veins like a pump impeller. As the mill turns/rotates the slurry is "pumped" out and discharged.
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Ball Mill Maintenance Installation Procedure
· Ball Mill FEED BOX. Ordinarily the feed box for a scoop tender is designed and supplied by the user. The feed box should be so constructed that it has at least 6″ clearance on both sides and at the bottom of the scoop. This clearance is measured from the outside of the feed scoop.
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Major Mines Projects Young-Davidson Mine
The SAG mill discharge reports to the cyclone feed pump box. A centrifugal pump (with one stand-by) with a 298 kW (400 hp) VFD drive delivers the slurry from the cyclone feed pump box to a battery of three (two are typically in operation) ø660 mm (26") hydrocyclones fed from a common manifold.
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SPM_Report-_sag_millCondition Monitoring the
Condition monitoring the intelligent Way SAG MILL M/C Condition Critical Machine Condition Report Machine Technical Data's ISO 10816 Classification Class-IV <7.1-Normal 7.1 to 18.0-Marginal >18.0- Critical Motor Speed. 660 RPM approximately Gear box Input Speed 660 RPM approximately Gear box output Speed 133 RPM approximately Mill Speed 8
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Mill Trunnion Liner911 Metallurgist
· The Mill Trunnion Liner fits inside the bearing to protect it from wear caused by the ore being washed over the liner and through the bearing as it is fed to or discharged from the mill.. The difference in the trunnions at each end of the mill isn't in the trunnions themselves. The trunnion liner on the feed end of the mill may have a WORM to assist the ore into the mill.
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Increasing Productivity Without Capital Expenditure
· mill total charge mill ball charge cyclone overflow size and even SAG mill discharge slurry flow rates and densities. The implementation of soft sensors to estimate these variables can provide additional information to aid circuit optimization as well as increasing advanced control system availability.
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Throughput optimisation in milling circuits
If the mill feed setpoint is changed then the actual feed rate needs to stabilise at the new target in a short period of time. The feed rate setpoint can then be tied into a SAG mill power optimisation strategy. SAG mill discharge control is quite involved due to few interactive variables such as mill discharge sump level
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Improved Relationships for Discharge in SAG/AG Mills
· discharge and classification are known to be flawed and have been identified as one of the key limitations in AG/SAG modelling. The aim of this thesis is to improve on the current understanding of discharge in the SAG/AG model. It focuses on the present
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Lihir Gold Limited Process Plant Flowsheet
· Ball Mill SAG Mill Cyclone Pump CCD # 1 CCD # 2 To Neutralization Mill Water To Grinding Overflow Tank Junction Box Deaeration Tank Tailings Discharge Line Sea Level Barren Solution To CIL Bullion r.d. alviso 3/3/01 Rinse Water Tank Crusher Discharge Conveyor R.O.M. Stockfile Hard Ore Soft Ore Hard Ore Dump Hopper Front End Loader Carbon
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RESPONSE OF PRIMARY GRINDING MILL PERFORMANCE
SAG mill and how the vibration response and hence mill operating conditions vary as a function of time including during mill equipment failures such as a broken discharge grate. Opportunities for improved mill control based on the data from the on-line monitor are also discussed as well as the implications in terms of mill processing and
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Major Mines Projects Silvertip Mine
SAG mill dimensions are 18 ft dia. x 7 ft FF (flange to flange) and is equipped with a 1 000 hp motor while the ball mill is 11 ft dia. x 14 ft 7 in FF and equipped with a 900 hp motor. Coarse ore is reclaimed from the storage bin and is fed via a conveyor to the SAG mill which runs with very minimal ball charge due to over-capacity of the mill.
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Ball Mill Maintenance Installation Procedure
· Ball Mill FEED BOX. Ordinarily the feed box for a scoop tender is designed and supplied by the user. The feed box should be so constructed that it has at least 6″ clearance on both sides and at the bottom of the scoop. This clearance is measured from the outside of the feed scoop.
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Lihir Gold Limited Process Plant Flowsheet
· Ball Mill SAG Mill Cyclone Pump CCD # 1 CCD # 2 To Neutralization Mill Water To Grinding Overflow Tank Junction Box Deaeration Tank Tailings Discharge Line Sea Level Barren Solution To CIL Bullion r.d. alviso 3/3/01 Rinse Water Tank Crusher Discharge Conveyor R.O.M. Stockfile Hard Ore Soft Ore Hard Ore Dump Hopper Front End Loader Carbon
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SM at Kennecott Utah Copper Introduction
· one SAG mill feeding two ball mills in a closed circuit with a hydrocyclone battery (Figure 1). The aim of the ball mill/ hydrocyclone circuit is to produce the optimum flotation feed particle size while maintaining grind throughput. The optimal operating point is a trade-off between throughput recovery and grinding cost.
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SM at Kennecott Utah Copper Introduction
· one SAG mill feeding two ball mills in a closed circuit with a hydrocyclone battery (Figure 1). The aim of the ball mill/ hydrocyclone circuit is to produce the optimum flotation feed particle size while maintaining grind throughput. The optimal operating point is a trade-off between throughput recovery and grinding cost.
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Uneven SAG Mill Drive Power DrawGrinding
· There are two GE motors for SAG mill but unfortunately sometimes current draw exceeds more than 300 A in one of them and makes SAG mill shut down. you also might find a small pan of water placed on the bottom of the brush box helps. We found this so in the Arizona and Chilean desert. S. "Electrical Discharge Machining" as a result of
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A novel semiautogenous mill liner wear kinetics model
· The feed to the SAG mill is under 17.5 cm which is the product of a gyratory crusher. The discharge of the SAG mill goes to a vibrating screen with the openings of 5 mm. The oversize material is recycled to the SAG mill and the undersize is combined with the ball mill discharge
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Major Mines Projects Hermosa Project
Screen oversize is recirculated to the SAG mill feed chute by a series of conveyors. Screen undersize will flow by gravity to the cyclone feed pump box. A belt scale mounted on the recycle conveyor will monitor the SAG mill recycle rate. The target SAG grind is P80 of 2 178 microns. Secondary grinding will be performed in a ball mill. The ball
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Grinding Millan overview ScienceDirect Topics
Usually the charge volume of SAG mills occupy between 30-40 of its internal volume at which the grinding rate is maximized. When the charge volume is more then the throughput suffers. The fill level is monitored by mill weight measurement as most modem mills are invariably mounted on load-cells.
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Ball Mill Operation -Grinding Circuit Startup Shutdown
· Ball Mill Operation -Grinding Circuit Startup Shutdown Procedure. The following items must be checked before the equipment in the Grinding Circuit is started. Check the ore slot feeder for obstruction or hang—ups. Check the ball mill belt feeder for undue buildup of material. Check oil level in ball mill lube oil tanks.
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Major Mines Projects Hermosa Project
Screen oversize is recirculated to the SAG mill feed chute by a series of conveyors. Screen undersize will flow by gravity to the cyclone feed pump box. A belt scale mounted on the recycle conveyor will monitor the SAG mill recycle rate. The target SAG grind is P80 of 2 178 microns. Secondary grinding will be performed in a ball mill. The ball
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