The Conga project is located approximately 560 miles (900km) north of Lima, at an altitude of 13,400ft (4100m) above sea level. It is situated near the Newmont Yanacocha gold mine, where installed what was then the world's largest single-stage SAG mill, a 32ft x 32ft (9.75m x 9.75m) EGL mill, driven by a 16.5MW ABB gearless motor, in 2008.

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Due to its strong lifting capacity and excellent grinding performance, the trapezoidal liner is widely used in the SAG mill. The structure of the trapezoidal liner is shown in Fig. 1, the main dimensions are: dip angle (tau), length of the top edge (L) and height (h).Dip angle (tau) determines the trajectory of the mediums in the SAG mill, which directly affects the …

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A view of the SAG Mill and Ball Mill at Agnico Eagle's Meadowbank mine in Nunavut, in this June 28, 2011 file photograph. At the rim of the Arctic Circle in Canada, gold mining firm Agnico-Eagle is learning how tough it is to operate in a remote region with temptingly large, but frustratingly inaccessible, reserves of oil, gas and minerals.

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The SAG mill agreement has come about as First Majestic ordered a complete new SAG mill package, which, Condor says, is now superfluous to its requirements. 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.

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All Grinding Mill & Ball Mill Manufacturers understand the object of the grinding process is a mechanical reduction in size of crushable material. Grinding can be undertaken in many ways. The most common way for high capacity …

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BrainWave SAG mill is a unique control package using patented model-based predictive adaptive control technology. It is well known within the mining industry that effective grinding in a SAG mill depends largely on the loading of the mill. A mill con - taining too much material does not allow for adequate movement of the ore and balls within ...

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SAG MILL CRASH STOPS After the project was approved baseline data collection was required in the form of SAG mill "crash stops". In a crash stop the SAG mill is operated under steady-state conditions and then stopped as if the power plug was pulled. After mill lock-out and confined space procedures are

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TechnoMine Services, LLC. SAG Mill section and Ball Mill section calculated power draw of approximately 8,595 kW (11,521 HP). Assuming 95% efficiency for the motor/transmission system of …

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SAG Mill Circuits The use of modelling and simulation has become routine in the design and optimisation of AG and SAG mill circuits. One of the most widely used models for this purpose is the so-called "variable rates" model (Morrell and Morrison, 1996). A more up-to-date version has also been developed with enhanced predictive

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) to represent the experimental data, for the 4 SAG mills studied, can be seen in Fig. 6. To show the predicted quality as was previously mentioned some data not used for modelling are also included as predicted values. Download : Download full-size image; Fig. 6. SAG mill specific energy model (Eq. ).

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Precise control of SAG mill loading and flotation cell level is critical to maximize production and ... they take the form of software running on a PC that is frequently exchanging information (receiving ... Full multivariable processes (multiple-input, multiple-output) may also be modeling using . SAG MILLS .

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The new SAG Mill forms stage 1 of production, the aim is to materially expand production capacity after 2-3 years. I am also delighted that First Majestic Silver Corp has given a vote of confidence to Condor's management team and endorsed a new mine at the fully permitted La India Project by accepting part payment in Condor's shares at 50p.

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EF5BM=[ P80+10.3 1.145×P80] ( 3 ) The EF4 formula requires both the rod mill and ball mill work index (rod mill Wi is used to calculate the optimal feed size) and because this is a "single-stage ball mill" calculation, the F80 is actually the rod mill feed size (10,000 µm) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 µm to ball

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Plant scale SAG mills are generally modelled using only a narrow slice from the middle of the mill. Figure 11 shows the charge distribution predicted in a 0.5 m section of a 36 in. SAG mill. There are 72 rows of symmetric close …

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The material is then Page 46 of 67 sent to the grinding circuit, which consists of an open circuit SAG mill and a ball mill in closed circuit with cyclones. breakwater.ca La matière est ensuite envoyée à un circuit de broyage constitué d'un broyeur semi-autogène à circui t ouvert e t d'un broyeur à boulets en circuit fermé muni de cyclones.

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If the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant tonnage to satisfy another constraint elsewhere. Underground mines are an example: …

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Authors' final version of paper published in Minerals Engineering 22(12):1032-1044, Oct 2009 INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV: INFERENTIAL MODEL VALIDATION T. A. APELT*§ and N. F. THORNHILL§ § Centre for Process Systems Engineering, Imperial College SW7 2BY. Email: [email protected]

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The new practice of apply ing full pre - crushing of SAG mill feed to substantially increase. throughput is challenged as retrogressive and inefficient …

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sag mill egl definition – Crushing Plant | Grinding Mill. With good definition for the design power level …. SAG mill is an investment that can produce …

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The SAG mill was designed to treat 2,065 t h −1 of ore at a ball charge of 8% volume, total filling of 25% volume, and an operating mill speed of 74% of critical. The mill is fitted with 80 mm grates with total grate open area of 7.66 m 2 ( Hart et al., 2001 ).

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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 …

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A SAG mill is generally used as a primary or first stage grinding solution. SAG mill is a tumbling mill with a large rotating drum, is filled with ore, water, and steel grinding balls. The result is a fine slurry. The mill is so named because the rock itself does some of the grinding.

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If the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant …

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Mill drive arrangement. Mill drives are generally located on the outside of the mill to facilitate maintenance. • Mill discharge arrangement. If the SAG and ball mills feed separate pump systems this is not an issue. If the two stages feed the same pump system, the SAG mill usually drives the discharge arrangement.

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However, in the SAG mill case, it proved wˆ u ðsÞ ¼ 10 3 ðA:21Þ 0:04s þ 1 possible to design a simple FB – FF controller where each component had the form of a low-order lead –lag transfer Using the process transfer functions together with the function: weighting functions above, the following robust controller was determined for the ...

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In the SAG mill, the collisions with large energy acting on the ore mainly occur in the toe area, where the dropped steel balls and ore with high kinetic energy hit the ore and liner. As shown in Fig. 12c, the collision frequency between ore-ore and ore-media in the SP grinding system is similar in Range C (> 0.6 J). However, in the PH-SP ...

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