sag mills process

Rethinking the value of mill relining

The relining of mills is a necessary process and it is very often the critical maintenance path of a concentrator shut down. Generally speaking, and depending on current ore prices, the production of a large SAG mill usually equates to between US$30,000 and US$200,000 per hour. Get price

Major Mines Projects

The Juniper mill consists of a variable speed SAG mill operating in closed circuit with a discharge screen. SAG mill product is fed to a ball mill operating in closed circuit with cyclones. 1.5 MW installed power;18 ft x 6.5 ft (6 m x 2 m) 900HP SAG (Variable speed drive), turns both directions, 11.5 ft x16.5 ft (3.8 m x 5.5 m) 1150 HP ball mill. Get price

The measurement of comminution processes in tumbling mills

Pax R A, 2011. Non-contact acoustic measurement of dynamic in mill processes for SAG/AG mills, in Proceedings MetPlant 2011, pp 163-175 (The Australasian Institute of Mining and Metallurgy: Melbourne). Pax R A, Wynn R, Mann S and Cornish B, 2014. Get price

SAGwise™ total process control The key to efficient SAG

SAG mill optimisation Take control of your SAG mill process Reducing downtime through data Downtime is the most inefficient thing of all for a processing plant, costing hundreds of thousands of dollars each hour. Mill loading is key to running the mill more efficiently and at lower expense. Get price

Filling Steel Ball Sag Mill For Gold Process

Sag mills are primarily used at gold copper and platinum mines where steel balls are used for the grinding the manta controls advanced control system called the sag cube automatically monitors and controls a sag mill keeping track of critical process variables impacting mill throughput. Get price

SAG Milling in Australia

MW). It has been the industry standard for SAG mills above 13 MW capacity. However, pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia. Get price

SAGwise™ total process control The key to efficient SAG

SAG mill optimisation Take control of your SAG mill process Reducing downtime through data Downtime is the most inefficient thing of all for a processing plant, costing hundreds of thousands of dollars each hour. Mill loading is key to running the mill more efficiently and at lower expense. Get price

Advanced Controller for Grinding Mills: Results from a

process upsets and to recognize operation realities such as: A change in quality of ore type and ore size (F80). These types of changes can lead to process upsets such as mill spills and/or power excursions in SAG mills, "centrifuging" in ball mills, etc. Get price

SAG Mill Control: It Shouldn't be that Hard

While many mills today are mounted on load cells, others employ bearing oil pressure as a proxy measurement of mill load. A control strategy recently implemented on a large variable-speed SAG mill at MMG's Century Zinc operation in Australia is shown in the chart (found on pg. 32). Get price

SAG Mill Trommel Screens

Multotec has the process capability to size SAG mill trommels to suit each customer's unique requirements, and supplies this equipment to both mill OEMs and mines in diameters of up to 5.5 m. Process guarantees are supplied with all trommel screens sized by Multotec. Get price

EDEM Simulation for Mining Metals Industries

The performance and reliability of bulk materials handling and processing equipment used in mining operations, mineral processing and steel making plants, such as conveyor transfer points and feed chutes, reclaimers, crushers and grinding mills is a critical factor determining the Get price

A Neural Network Model for SAG Mill Control

SAG specific power range of about 3 to 9 kWh/t for this site. The design of the ore stockpiling and conveying system contributes to fluctuating size distribution with significant short-term segregation occurring under certain operating situations. Depending on ore type and feed size distribution, each SAG mill will process between 700 and 3000 tph. Get price

Semi Autogenius Grinding (SAG) Mill

The SAG mill is often one of the largest pieces of mining equipment and is key for operations. Often used in the mining process of precious metals, the SAG mills break up solid ore into small pieces for processing. We understand the importance of the SAG mill and have the proper tools to accurately monitor the temperature of the mill's motor. Get price

Estimated Water Requirements for the Conventional

process, run-of-mine ore, which may contain from about 2 to 5 percent water, by weight, when mined, is The crushed ore is transferred to a semiautogenous (SAG) mill or ball mill where the ore is further reduced in size. Water is added to the ball mill, in which a slurry that usually contains from Get price

Modelling SAG milling power and specific energy

mill diameter, mill length, grates openings, and pebble ports size; the power equation is also function of all the operational variables selected for this study. The applied force is a function of the mass inside the mill and it is composed of balls, ore and water. The ball charge is a function of the bulk fraction of the SAG mill volume (Jb) Get price

SAG Mill Control: It Shouldnt be that Hard

Today, autogenous grinding (AG) mills as large as 40-ft in diameter with motor power in excess of 20 MW are being ordered and installed as producers look for higher production and economy of scale in their process plants. Semiautogenous grinding (SAG) mills up to 44-ft diameter with 35-MW gearless mill drives (GMDs) are available. Get price

Ball mill

A ball mill is a type of grinder used to grind, blend and sometimes for mixing of materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering.It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotati Get price

Major Mines Projects

Primary mills consist of three semi-autogenous (SAG) mills and two autogenous (AG) mills. The SAG mills are comprised of two 9.75 metre diameter by 4.72 metre long fixed speed mills and one 10.36 metre diameter by 4.88 metre long variable speed mill. Each primary grinding line is supported by two secondary ball mills at 5.03 metres in diameter. Get price

process in sag mill

Ore processing – Waihi Gold. The grinding process reduces the rock to a slurry The SAG mill is a large revolving cylinder Rock is ground by the turning action of the mill and impact from the hardened steel balls and the rock itself In order to ensure that the rock is ground finely enough the SAG mill has a trommel screen 5 which acts like a large sieve Get price

Toe angle measurement for SAG mill control at Lihir gold

SAG Mill process control classically maintains the SAG mill volumetric filling within a set operating range. Typically a SAG mill weight measurement, by either bearing pressure transducers or load cells, is used as an inferred measurement of volumetric filling. To maintain volumetric filling within a set operating range the SAG weight setpoint Get price

MINERAL PROCESSING: SAG, ball mills ordered for Mt

May 30, 2010Purchase orders placed for process plant and power supply equipment represent approximately 12% of the total initial capital cost. will supply the primary crusher, semi-autogenous grinding (SAG) mill, two ball mills and other associated process plant equipment. ABB Switzerland will supply the drive motors for the SAG mill and ball mills Get price

SAG temperature measurement

Process Mill; Semi Autogenius Grinding (SAG) Mill; The SAG mill's motor – a critical piece of equipment – must be monitored for temperature. This is essential for avoiding costly, unexpected plant shutdowns as well as high service and parts costs. Continuous measurement can be difficult because the point is continuously rotating Get price

SAG Mill Liner

AG/SAG Mill Liners From MGS Casting. At MGS Casting, we engineer innovative designs, tailored especially for every customer. Our AG/SAG mill liners are manufactured to the highest industry standard for Autogenous Grinding(AG), Semi-Autogenous Grinding(SAG), Primary / Secondary and re-grind rod or ball mills. Get price

SAG MILLS ( semi autogenous grinding mill )

Apr 22, 2016A Sag mill is most often used in the mining fields, particularly in the mining of precious metals such as gold, copper, silver, and nickel. The sag mill serves in the line of industrial mining equipment designed to process, crush, separate, or locate precious metals from mined coal. Get price

Mineral Processing

The ore is then ground into very fine particles less than one-fifth of one millimetre in diameter in large rotating SAG (Semi Autogenous Grinding) and Ball Mills which look like huge steel drums. Water is added to the process, creating mud-like slurry which is pumped to large tanks called flotation cells. Get price

Major Mines Projects

Primary mills consist of three semi-autogenous (SAG) mills and two autogenous (AG) mills. The SAG mills are comprised of two 9.75 metre diameter by 4.72 metre long fixed speed mills and one 10.36 metre diameter by 4.88 metre long variable speed mill. Each primary grinding line is supported by two secondary ball mills at 5.03 metres in diameter. Get price