Mining Industry What is the difference of ball mill

Most mills used in mining rely on impact to breakdown rock to a suitable size for downstream processing. The impact can be rock on rock such as in an Autogenous Grinding (AG) mill, rock and a small ball charge (~10%), used in Semi Autogenous Grind

Chat Online

A Nonlinear Process Monitoring Appro ach ro ta tio n

A Nonlinear Process Monitoring Appro ach K.S . McClure*, R .B. Gopaluni** Abstract Detecting the onset of overloading in a semi -autogenous grinding (SAG) mill is a challenging task for operators to perform due to the complex and nonlinear nature of an overload. characteristic inverse correlation between power and bearing pressure of

Chat Online

RESPONSE OF PRIMARY GRINDING MILL PERFORMANCE TO

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

Mill (grinding)Wikipedia

SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.

Chat Online

Increase throughput and capacity in SAG mills

It is the sound of rising costs by the hour both from the downtime itself and from maintenance costs. Optimising the capacity of your SAG mill is crucial to avoiding downtime and liner wear and damage. With variances in mill ore feed rate, mill speed and slurry density, critical impacts can occur in your SAG mill.

Chat Online

SAG Mill Control at Northparkes Final

SAG Mill Control at Northparkes Page 1 mipac load from bearing oil pressure. Both approaches have advantages but also some short comings. Bearing oil pressure suffers from inaccuracy. Load cells are expensive to retrofit to which have reported to the oversize of the discharge screen. It is common practice is to crush

Chat Online

SAG MillSemi-Autogenous Grinding Mill

A SAG mill is characterized by its large diameter and short length. It rotates, tumbling its contents violently, causing a breaking action. The mill is lined with wear resistant steel liners which are fitted with lifters to assist with raising the load. The liners are replaced as

Chat Online

Modelling SAG milling power and specific energy

Modelling SAG milling power and specific energy consumption including the feed percentage of intermediate size particles In these circuits the SAG mill is the largest energy consumer. In many engineering rectly measured with bearing pressure measurements, it was decided to discard it as an input variable. The main reason is that

Published in Minerals Engineering · 2015Authors M Silva · Ana CasaliAffiliation University of ChileChat Online

SAG MillSemi-Autogenous Grinding Mill

A SAG mill is characterized by its large diameter and short length. It rotates, tumbling its contents violently, causing a breaking action. The mill is lined with wear resistant steel liners which are fitted with lifters to assist with raising the load. The liners are replaced as

Chat Online

Improved mill control at Lihir Gold Mine in Papua New

At the Lihir Gold Mine, the plant was utilizing mill's bearing pressure to calculate load measurement for the SAG mill in HGO1. The use of SAG mill weight for process control is additionally complicated at Lihir by compromised and suddenly drifting load cell and bearing pressure measurements on two of the process plant's three SAG mills.

Chat Online

Streamlining the Steps to Optimized Production Project

SAG Mill Control . SAG mills can be optimized for maximum ore throughput or maximum grinding energy efficiency. In both cases, precise control of the mill filling percentage is critical (Wills and Napier-Munn, 2006). Maintaining constant mill weight, as indicated by bearing pressure, is one approach to stabilize the mill

Chat Online

Outotec Grinding MillsOutotec

We offer autogenous (AG), semi-autogenous (SAG), ball, rod, and pebble mills in sizes ranging from kWs up to 30 MW. Our product range also includes a number of unique solutions, including the world's largest acid-resistant grinding mills, which can operate with extremely corrosive slurry.

Chat Online

Autogenous and Semi-Autogenous Mills FL

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

Chat Online

Inferential measurement of SAG mill parameters III

The results suggest that regular calibration of oversize crusher and primary cyclone feed instrumentation, regular measurement of the SAG mill discharge screen aperture, oversize crusher gap setting and process water specific gravity and careful fitting of the SAG mill discharge grate model parameters will minimise uncertainty in the

Chat Online

Model Predictive Control for SAG Milling in Minerals

Model Predictive Control for SAG Milling in Minerals Processing 5 Model Predictive Control on a SAG Mill and Ball Mills The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure.

Chat Online

Mill Lubrication SystemSlideShare

Jan 13, 2014 · Parts of SAG Mill to be lubricated Trunion Bearing (feed end) Motor Bearings Gearbox Pinion Bearings Fig.1 SAG mill Diagram Trunion Bearing (dis. end) 7. Lubricant Data Masbate Gold Project's SAG mill uses Compounded Gear Oil as their main lubricant. But a different class of Gear oil is use in every operating system of the SAG mill.

Chat Online

REAL-TIME OPTIMIZATION OF SAG MILLS USING GENETIC

REAL-TIME OPTIMIZATION OF SAG MILLS USING GENETIC ALGORITHMS Juan Becker, Jose Salazar, Luis Magne and Francisco Cubillos* Facultad de Ingeniería, Universidad de Santiago de Chile.

Chat Online

Dynamic modeling and simulation of a SAG mill for mill

This model was then used to predict the dynamic responses of other key operational variables, such as mill power, bearing pressure, charge level and product size distribution. The transient response of mill behavior with respect to changes in feed size distribution, tonnage and mill feed water is also presented.

Chat Online

Dynamic modelling and simulation of semi-autogenous mills

The model output variables are power-draw, load level, ball load, mineral discharge rate and size distribution, water discharge rate, ball throughput, bearing pressure, pebble throughput, and toe and shoulder angles of the internal load. 2.1. SAG mill model

Chat Online

5500 Severe Duty Slurry Pumps Goulds Pumps

Severe duty slurry pumps for the toughest abrasive slurry services, but also is designed for extreme ease of maintenance and safety. A heavy duty bearing frame and shaft, extra thick wall sections and easily replaceable wear parts add up to many years of service even under the severest operating conditions.

Chat Online

Development of an Innovative Copper Flowsheet at Phu Kham

CRUSHER SAG MILL BALL MILL TAILINGS DAM CONCENTRATE THICKENER CONCENTRATE TANK CONCENTRATE FILTER CONCENTRATE STOCKPILE MILL CYCLONES ROUGHER CONCENTRATE CYCLONES. Phu Kham Flowsheet • 12.8 Mt/a of copper-gold bearing ore from the open pit • Plant Feed Grades are 0.75% Cu and 0.33g/t of Au and 3.8g/t High Pressure

Chat Online

KnowledgeScape

Grinding Mill Charge Detection Sensors. The throughput and efficiency of a SAG mill depends on the volumetric load An overloaded mill has reduced coarse ore breakage, as the cascading balls and rock cannot drop far enough, reducing kinetic energy for breakage.

Chat Online

Goulds SRL

• Oil-lubricated cartridge bearing assembly • Heavy-duty bearings for reliability and long life Gland Seal Options • Standard- and low-dilution seal water or mechanical seal • Replaceable XH-800 shaft sleeve for maximum life Applications • Primary Metals SAG/ball mill discharge, cyclone feed and tailings

Chat Online

The Selection and Design of Mill LinersMillTraj

The Selection and Design of Mill Liners . Mines (WA) 36ft SAG mill the number of Outer Head Liners was reduced from 36 to 18 pieces and in doing so reduced the time to replace them by 9 hours at a cost downtime saving of about U$25,000 per generally now used for discharge grates where

Authors M S Powell · I Smit · P Radsizewski · Paul W Cleary · B Rattray · K ErikssonAffiliation University of Cape TownChat Online

MillScanner™WordPress

SAG mill control, insight, and reliability.!!!!! The throughput and efficiency of a SAG mill depends on the volumetric load An overloaded mill has Typically, SAG mill control is performed with respect to bearing pressure and other process variables Improve grate discharge design to keep pulp level constant all through the mill length

Chat Online

OOKING INSIDE YOUR MILL

• MILL SPEED CONTROLAutomatic speed control using the Liner Damage Level signal. • MILL FILL LEVEL CONTROLUse the Mill Feed Rate to control the Mill Fill Level (rather than bearing pressure). The Mill Fill Level setpoint can be pushed to a

Chat Online

PolycorpAG/SAG Mill Liners

AG/SAG Mill Liners. We have supplied rubber pulp lifters for SAG mills up to 40 ft in diameter. We are pioneers in the design of both radial and curved pulp lifters, also design and manufacture Rubber / PolyStl™ grates and discharge systems.

Chat Online

PAI SAG Mill TrainingYouTube

Jan 08, 2016 · In this training module, we'll cover the workings of a semi-autogenous grinding mill, or SAG mill, that's designed to be the first stage of a grinding circuit. Ore that's crushed in a primary

Chat Online

Grinding millsMetso

Every mining operation has a unique grinding process. has experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of your mill.

Chat Online

sag mill for salestudiogenetta

A SAG Mill trommel screen lets you control the true discharge size of your SAG mill or the transfer size to the downstream Ball Mill circuit. A well sized trommel should not let rocks pass to the Ball Mill if they are to be more than say 5/8″ or 16mm In the image case below, strangely enough, is the mill shell liner and discharge grate

Chat Online

Paper # 25Copper Mountain Overview on the Grinding

The grinding circuit for the Copper Mountain project consists of one FL SAG mill and two FL ball mills. Figure 1Overview grinding circuit The Copper Mountain SAG mill is 10363 mm [34 feet] in diameter and 6096 mm [20 feet] long. It is a grate discharge mill with an inside diameter of 10363 mm [34 feet] and a grinding length of 5334

Chat Online

KnowledgeScape

Grinding Mill Charge Detection Sensors. The throughput and efficiency of a SAG mill depends on the volumetric load An overloaded mill has reduced coarse ore breakage, as the cascading balls and rock cannot drop far enough, reducing kinetic energy for breakage.

Chat Online

discharge bearing pressure in a sag millGrinding Mill China

discharge bearing pressure in a sag mill rolling bearing SAG mill Product Description This series ball mill is widely used in black volume of ball, » Learn More. Inferential measurement of SAG mill parameters Mill bearing pressure and powerdraw The SAG mill discharge screen oversize conveyor measurement has

Chat Online

Mining Industry What is the difference of ball mill

Most mills used in mining rely on impact to breakdown rock to a suitable size for downstream processing. The impact can be rock on rock such as in an Autogenous Grinding (AG) mill, rock and a small ball charge (~10%), used in Semi Autogenous Grind

Chat Online

grate discharge limitedstudiogenetta

Grate Discharging Ball Mill, Grate Discharging Ball Mill the reasons 2 ----- Our grate discharge ball mill exported to more than 180 countries and regions, there are a lot of overseas offices and branches, you can rest assured purchase. goethite high quality grate discharge ball mill installation grate discharge ball mill correct installation method is a good basis for operation of the

Chat Online

Automated SAG Mill Speed Control Using On-contact

Automated SAG Mill Speed Control Using Additional vibration sensors were also positioned at fixed points on the inlet and discharge ends of the mill to yield two real-time volumetric fill levels along with another fill level measurement taken i.e. mill power and bearing pressure. 4.

Chat Online

Paper # 25Copper Mountain Overview on the Grinding

The grinding circuit for the Copper Mountain project consists of one FL SAG mill and two FL ball mills. Figure 1Overview grinding circuit The Copper Mountain SAG mill is 10363 mm [34 feet] in diameter and 6096 mm [20 feet] long. It is a grate discharge mill with an inside diameter of 10363 mm [34 feet] and a grinding length of 5334

Chat Online

Contact Us

GBM is a leading and pioneering enterprise with the most advanced international level in R&D, manufacturing and selling of large-scale crushing & screening plants.

chat Online

About us

GBM Industry & Technology Group Co., Ltd. is one high-tech enterprise, which involves R&D, production

Read More