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300 mm have been observed in the crusher product due to the nature of the rock. The crusher product is stockpiled and six vibro feeders feed 2-low aspect SAG mills (16x24ft) which operate in closed circuit with 750 mm diameter cyclones. The …

The attributes of the Ok Tedi SAG mills . that are used by the expert system are power draw, lift pressure, motor temperature and recycle tonnage. Fresh feed tonnage and feed density are the manipulated variables. Set point changes in tonnage or SAG mill feed density are returned to the DCS PID controllers. Fuzzy sets are defined for all the

• 28 MW GMD for a 40' SAG mill • 28 MW GMD for 42' SAG mill Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), ABB's GMDs are well positioned to contribute to the building of larger and ever more powerful mills. — Leading the gearless mill drive evolution The ABB gearless mill drive (GMD) is the most powerful ...

SAG mill control fundamentally means managing the load in the mill by adjusting the feed rate of ore to the mill and/or manipulating the rotational speed of the mill. The best way to measure load is to mount the mill on load cells. ... • Control loop structures degrade gracefully—this is a natural consequence of the loop "topology." ...

1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used …

A data set of mill operating data is collected from published information and compared to predictions made by two published mill power draw models for SAG mills (Austin's SAG model and Morrell's C-model). A third model (Hogg and Fuerstenau) is fit to each survey and the principal fitting parameter is tabulated. Power measurement

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A Discrete Elements Method (DEM) study of load movement within a SAG mill 12,192 × 7620 (40′ × 25′) in normal operating conditions is performed. The purpose is to determine how the geometry of the lifters affects the kinetics of the load inside the mill. Specifically, the changes produced by the incorporation of inclined lifters and spiral or helicoidal pulp lifters to the …

Starting as small as 13 feet (4 m) in diameter on 330 HP and as large as 24' (14.5 m) in diameter on 3,300 HP, the 911MPE Semi & Fully Autogenous …

Semi autogenous grinding (SAG) mills, because of their advantages in terms of capital and operating costs, were the natural choice for mines as their primary grinding mill option. Then, in the late 1980s when the price of copper …

Modern, large SAG mills are major capital- cost items with price tags reaching well into the eight-figure dollar range. They stand at the entry point to a variety of comminution circuit setups and when they stop for whatever reason, the revenue losses per circuit mount quickly.

Grinding is one of the most important and expensive steps of mineral processing. Therefore, different types of grinding mills such as rod mills, ball mills, semi-autogenous (SAG) mills and autogenous (AG) mills can be utilized for comminution of mineral ores [].Up to today, SAG mills and AG mills have been widely used to reduce operation costs and increase …

With the development of the world's largest SAG mill, Ø40'x29', Outotec responds to the need by offering increased efficiency, effective grinding conditions and improved mill capacity up to 15% with reduced energy consumption. Outotec has recently been awarded a contract to deliver one of the largest grinding mills in the world.

AG/SAG mills, circuit design, plant performance, optimization INTRODUCTION AG or SAG mills have been in use in comminution circuits since the 1950's and are considered a mature technology in most countries. However, a reasonable number of recent SAG mill based projects

SAG mills mimic the same shortcoming. It follows that in order to obtain the speciﬁ c energy (SE) to achieve a certain transfer size, based on the 80 per cent passing value, an inefﬁ ciency factor must be applied to the SE of single stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method.

Natural resources are essential to economic development and pivotal to everyday life. The agriculture, mining, oil, gas and chemical supply chains are evolving rapidly, with developing international trade and changing market demands, and an increased focus on environmental, social and corporate governance (ESG).

Also, the mill load varied in the range of 125 to 165 tons. These disturbances propagated throughout the milling circuit and even to the flotation circuit. The Millstar Power Optimiser gave the following benefits: • Mill feed cuts were prevented, resulting in a stable mill loading. • No huge power dips occurred, since any sign of the mill

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a 38' SAG-Mill. The measurements resulted in a modal analysis detecting the real natural frequencies of the Ring Motor. 5.1 Measurement Layout The design engineers defined forty locations of measure-ment points in the stator of the Ring Motor. They designed a mechanical shaker to inject forces and movements to the stator housing.

Some dry autogenous mills operating in Canada are 8.5 m in diameter and 1.5 m in length. These are known as Aerofall mills. The Cadia Hill (Australia) wet SAG mill is 12.2 m in diameter with a 20 MW motor and in 2004 was the largest diameter mill in operation in the world.

Semi autogenous grinding (SAG) mills, because of their advantages in terms of capital and operating costs, were the natural choice for mines as their …

Sag mill range. APPLICATION ENVIRONMENT For SAG milling applications, the diameter of the balls, mill and throw action of the charge provide for a high impact environment - therefore a balance must be achieved between …

These dry SAG mills differs from similar machines by their high diameter-to-length ratio and the use of wedge-shaped deflector liners on the mill end walls. It is believed that distinctive feature of dry AG/SAG mills, as compared with the conventional mill, is the special features of their liners. 1.3. The Gol-E-Gohar SAG mill liners configuration

Select the newly created Imported Geometry Bin Group 01, choose Natural List order and click the Import button then navigate to the file SAG_Mill_bins.stp in the tutorial folder. EDEM Classroom users will need to choose the SAG_Mill_bins.stl file from the folder instead.

Semi-Autogenous (SAG) Mills. Description of Autogenous Mill(AG Mill): This autogenous mill is typically designed to grind ores and other particulate matter in various fields like building material field, chemical industry, metallurgy …

The SAG mill has a mill diameter of 24 ft (7.3 m) and an effective grinding length of 18.5 ft and a structural charge mass of 315 t, Condor Gold said. The structural design ball charge is 11% with a structural design load volume of 35%. Specific gravity of the material is 2.55.

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