ball sag mill drive case study

HD Technologies Case Study Ball Mill Bearing DamageCBM

The subject of this case study is the NDE (non-drive end) Pinion Bearing of Ball Mill No 8 in the Mill Dpt. in the flotation plant. The bearings on the pinion are of type 22380YMB. SPM HD Spectrum from the NDE bearing shows a clear match of the BPFO (Ball Pass Frequency Outer Race) symptom.

Making remote mines and low ore grades economical and

Both ring-geared mill drives and GMDs can be employed to drive autogenous semi-autogenous (SAG) and/or ball mills. The applications may be the same but the challenge now is to develop bigger drivetrains with the power to drive these larger grinding mills

Ball Mill DrivesMineral Processing Metallurgy

Several types of ball mill drives can be furnished made up of various combinations of gearing motors and transmission equipment. The correct combination to be selected takes into consideration power requirements gear ratings floor space interference from other plant equipment and motor characteristics. The main types are described and illustrated on these pages. Motors considered are

SAG mill optimisation using power-based simulations Ausenco

In this paper a case study is presented benchmarking actual plant data against Ausgrind model predictions validating the calculation improvements. Comparisons of actual and predicted data show improved response of the program for variable operating conditions. For more information please contact Dr. Rajiv Chandramohan.

Cement Plant Energy Consumption In Tanzania Broyeur

Ball and tube mills bbd4772 case studycase study ball mill study ball mill iitd is one of the products of our company main high reliability ball sag mill drive case study chat explosion in bbd4772 ball mills for coal industry news bbd and coal mill 2014 Cement Plant Energy Consumption In Tanzania Broyeur bbd4772 case studycase study ball

Editor Laura White laura.whiteoutotec 1 OUTOTEC

• Case studyYara ACT thickener optimizer page 4 • Business news page 8 • Case studyHybrid CC filter plates page 10 • Person in focus- Jim Rego page 13 1/2018 Your grinding mill is at the heart of your The energy dissipated by arresting the falling charge concentrator plant. It is one of the most critical components there.

SAG Mill Grinding Circuit Design

Ball Millan overview ScienceDirect Topics

The ball mill is a tumbling mill that uses steel balls as the grinding media. The length of the cylindrical shell is usually 1–1.5 times the shell diameter (Figure 8.11).The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20–40 water by weight.

Multi-component AG/SAG mill modelScienceDirect

1. Introduction. The Run-of-mine composition strongly affects autogenous mill operation. However the effects of a varying ratio of hard and soft components in mill performance are not described by the current generation of AG/SAG models (Stange 1996).For example current JKSimMet models (Napier-Munn et al. 1996) assume a uniform feed and describe it using a single set of average ore

Paper # 25Copper Mountain Overview on the Grinding

Figure 7ABB synchronous motor on Ball Mill 1 The drive requirements for the Copper Mountain mills are as follows Rated power 2 x 6340 kW (2 x 8500 hp) SAG mill rated motor speed 204 rpm max. motor speed 214 rpm Ball mill rated motor speed 195 rpm

Ball Millan overview ScienceDirect Topics

The ball mill is a tumbling mill that uses steel balls as the grinding media. The length of the cylindrical shell is usually 1–1.5 times the shell diameter (Figure 8.11).The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20–40 water by weight.

Case Studies ArchiveLubrication Engineers

All Case Studies. Mining and Heavy Industry Customer Profile A Large International Mining Equipment OEM for Ball and AG/SAG Mills Application Open Gear Lubricant Spray System to service a Ball Mill with. Mining and Heavy Industry. Almasol® High Temperature Lubricant (1250) Dramatically Reduced Furnace Roller Failures Eliminated Extractor

Understanding Size Effects of Semi-autogenous Grinding

Oct 10 2016 · Understanding Size Effects of Semi-autogenous Grinding (SAG) Mill Operation as a Pathway to Solving Feed DisturbancesCase Study using the MMG Century SAG Mill in Proceedings 13th AusIMM Mill Operators Conference 2016 pp 321–330 (The Australasian Institute of Mining and Metallurgy Melbourne)."

Case Studies Archives Losugen Pty Ltd

Case Studies Case 1 Cumulative costs of Losugen solution vs traditional solution Customer Xstrata Ernest Henery Mine Issue Concrete SAG Mill Sump under

FRITSCH Planetary Mills classic lineYouTube

Dec 02 2013 · FRITSCH Planetary Mills of the classic line are ideally suited for wet and dry comminution of hard medium-hard brittle and fibrous materials. Samples can be processed from a few milligrams to

ABB commissions mill drives at Detour Lake gold mine in Canada

Nov 13 2013 · ABB s scope of supply included four dual pinion low-speed mill drive systems for two semiautogenous (SAG) and two ball mills each consisting of two synchronous motors converter transformers and ACS6000 frequency converters including active rectifier units that allow the mill drives to achieve a power factor of 0.90 leading.

Dr Zeljka Pokracic shares big data mine-to-mill case

Maps provide new insights for mine-to-mill optimisation. Below is a SAG mill throughput example SAG throughput mapped to pit overlaid with geology and drill and blast data Case Studies. Dr Pokrajcic s case studies showed how PRODFINDER helps companies predict and optimise across the value chain (e.g. mine-to-mill).

Dr Zeljka Pokracic shares big data mine-to-mill case

Maps provide new insights for mine-to-mill optimisation. Below is a SAG mill throughput example SAG throughput mapped to pit overlaid with geology and drill and blast data Case Studies. Dr Pokrajcic s case studies showed how PRODFINDER helps companies predict and optimise across the value chain (e.g. mine-to-mill).

The engineering and process effects of choosing a motor

The engineering and process effects of choosing a motor design speed. 3 The SAG mill power draw model of Austin (using the cali-bration by Doll 2013) is used to predict the process power drive pinion. Case study No 1 Changing pinion on a fixed speed mill A common way of changing the speed of a mill

Case Studies Quadro Design Pty Ltd

Re-design and manufacture of both the Sag Mill and Ball Mill feed chutes and liner systems to improve reliability and liner wear. The supply of ongoing spares for many different parts of the mining process. Design and manufacture of a ball dispensing station to allow filling and

Overflow Versus Grate Discharge Ball Mills An

A set of experimental test work has been carried out in a continuous pilot ball mill of 0.41m X 0.56 m (diameter X length) at different mill speeds percent solids and discharge mechanism. The results of study on material flow through a grate discharge tumbling mill verses an overflow tumbling mill are presented to emphasize the effect of

Industry Rexnord Autogard Torque Limiter and Application

Efficient and durable mill drive with minimal running costs and downtime in the event of a jam or sudden stoppages Ball and SAG mills Ball and Semi-Autogenous Grinding (SAG) mills are used in mining to crush the material into smaller more manageable sizes and to separate certain minerals. Ball

HIGH INTENSITY GRINDING ISSUE 32 AT ITS FINEST

HIGmillHigh Intensity Grinding / 1 Product News Ø40 SAG mill / 6 Case Study Assarel Medet / 7 Business News Backfill Specialists acquisition / 11 VPF technology / 12 Product News Reline Machines / 16 It is a well recognised fact that global ore grades are declining while commodity demands continue to rise. These ore bodies are

Modelling SAG milling power and specific energy

size ball load mill speed and solids will represent the total load. Ball Mill SAG Mill Scw Jb Pc -6" 1" N/Nc Fresh Feed Water Water Pebble Crusher Screen Cyclones Sump Pump Fig. 1. SABC A/B milling circuit. Scw = solid concentration by weight fraction in the SAG mill feed Jb = balls charge (bulk fraction of the SAG mill volume) N/Nc

SAG Mill Operation at Cortez Evolution of Liner Design

Figure 2 SAG Mill Crash Stop on 10/8/2003 Crash Stop #2March 3 2004 Please refer to Figures 3-5. This crash stop was done on severely SAG mill limiting ore that typically averaged 360-390 dry tph. In comparison the worst case SAG mill limiting ore type throughput is 8 160 dry tons per day (340 dtph).

Making remote mines and low ore grades economical and

Both ring-geared mill drives and GMDs can be employed to drive autogenous semi-autogenous (SAG) and/or ball mills. The applications may be the same but the challenge now is to develop bigger drivetrains with the power to drive these larger grinding mills

HIGH INTENSITY GRINDING ISSUE 32 AT ITS FINEST

HIGmillHigh Intensity Grinding / 1 Product News Ø40 SAG mill / 6 Case Study Assarel Medet / 7 Business News Backfill Specialists acquisition / 11 VPF technology / 12 Product News Reline Machines / 16 It is a well recognised fact that global ore grades are declining while commodity demands continue to rise. These ore bodies are

CASE STUDY PROMINENT HILLOutotec

to perform the mill s first dual shutdown since installed in August 2008. Both the SAG and Ball mill were scheduled for simultaneous relining to take place early in 2010 to replace the worn liners. MILL RELINE SCOPE As the mill liners had originally . been installed by the Outotec team (then TME) they were aware of the technical

GEARS DRIVES IRevival of the GMD in cement

around the mill. The mill shell carries the rotor poles which are individually mounted to form an even air gap with the wrap around motor. The number of poles (up to 76 poles on larger SAG mills) as well as the way the poles are mounted depends on the size of the motor. Figure 3 shows the mounting of poles on a large SAG mill.

Industry Rexnord Autogard Torque Limiter and Application

Efficient and durable mill drive with minimal running costs and downtime in the event of a jam or sudden stoppages Ball and SAG mills Ball and Semi-Autogenous Grinding (SAG) mills are used in mining to crush the material into smaller more manageable sizes and to separate certain minerals. Ball

Medium Voltage Adjustable Speed Drives Power Factor and

May 02 2019 · In a modern cement plant Medium Voltage (MV) ASDs are used on ID fans kilns separators finish mill ball/sag mills conveyors pumps. A new generation of regenerative medium voltage adjustable speed drives are being applied that not only deliver motor control but also can inject reactive power back to the connected bus.

THE ENGINEERING AND PROCESS EFFECTS OF CHOOSING

THE ENGINEERING AND PROCESS EFFECTS OF CHOOSING A MOTOR DESIGN SPEED A.G. Doll 1 and K. Tischler 2 The SAG mill power draw model of Austin (using the calibration by Doll 2013) is used to predict and the gear ratio of the mill bull gear and the drive pinion. CASE STUDY N° 1 CHANGING PINION ON A FIXED SPEED MILL

what is ball mill lubrication system

PROCESS DIAGNOSTIC STUDIES FOR CEMENT MILL . The mill performance is evaluated and recommendations are formulated based on the past history of the mill operations inspections process measurements feed/product characteristics and grinding performance in order to improve mill output and reduction in power consumptions in the ball mill system.

Mill Lining SystemsTrelleborg Engineered Products

Trelleborg designs and manufactures pulp lifter packages for AG SAG ball mills and scrubbers. Components are normally moulded but may also be hand-built for complicated profiles required for the "turbo lifter" style design. Mill liner case study. Read about our wear management advisory services for mills and scrubber linings. Case study

(PDF) Reducing Grinding Energy and Cost -Magnetite Iron

Reducing Grinding Energy and Cost -Magnetite Iron Ore Design Case Study. followed by a ball mill and pebble crusher in a SAG/AG ball mill circuit for most efficient use. Achieving consistent

Division of Operation and Maintenance Engineering Decision

analysis performed in a case study a cost-effective wear measurement method has been suggested taking the industry requirements into consideration. The wear of mill liners affects the production performance of the mining mill. Hence the replacement decision for mill liners affects not only the lining cost and the production loss