SAG mill, 40 ft, 42 ft, gearless mill drive, GMD, SAG manufacture, reliability THE PROJECT The Conga Project is located in Peru adjacent to Newmont's existing Yanacocha operations. The Conga Project has been in various development stages for approximately the last 15 years. In …

Oct 22, 2015· Conventional mining process circuits use both Semi-Autogenous Grinding (SAG) and Ball mills. It is very common that the SAG mills are operated with adjustable frequency drives (AFDs) and the Ball mills are operated at fixed speed [1]. Recently, however, adjustability of Ball mill speed has been given more consideration. Also, to maximize throughput, the Ball mills …

maximize throughput of the grinding line at a larger final product size while confidently closely approaching the downstream process limits. For a grinding line consisting of a SAG mill followed by conventional ball mills, this optimization strategy involves maximizing SAG mill fresh feed

• Increased SAG mill throughput by 5.9% and reduced energy consumption per tonne by 5.4% SAG Mill ACE BENEFITS • Automatically account for changes in variation of particle size or ore hardness • Minimize production disturbances • Maintain optimal production by minimizing changes to mill speed • Maximize production rate while providing

After primary jaw crushing to minus 5 inches, ore is fed to the single SAG mill (9' x 22', 1,500 kW motor) operating in closed circuit with cyclones. Throughput and power is increased by adding 5" diameter steel grinding balls. The Bond Work Index is reported to be 14 kWh/t.

Oct 01, 2018· The main goals of the FECS are: stabilization of SAG mill operation, maximize mill throughput, decreasing specific energy consumption, adjusting the feed solid content to the desired interval, training of the control room operators and to avoid the human-sourced errors from control strategies to ensure that the best decision will be been made ...

Dynamically adapt to multiple and changing optimization goals to maximize the throughput of many processes. ... Sub-optimal control of the SAG mill grinding process increases energy cost, long term machine cost, and potential disruptions in the downstream mining process.

mill configuration setup in order to maximize the milling rate. The mill circuit configuration inthis case only includes SAG Mill Discharge Grates, SAG Trommel Screen and Pebble Screen aperturesizes . It also discusses the strategy used to mitigate …

Increasing mill throughput up to 5%; Reducing mill power consumption by up to 7%; Increasing mill work index through more efficient grinding. With More Than 100 Installations Worldwide, Eriez ® Trunnion Magnets are a Proven and Better Approach to Maximize Productivity and Reduce Power Consumption in Ball/SAG Mill Applications

Jan 01, 2009· The optimizing level maximizes Power Draw using an online gradient estimation of the non-linear function between Power Draw and mill Hold Up. The results show that is possible to operate the SAG Mill in the optimal zone, compensate unmeasurable disturbances and maximize throughput without violating operational constraints.

Jan 01, 2015· The primary objective for a SAG mill is to maximize the throughput of fresh ore. Fresh feed ra e, however, is constrained by the total volume occupi by he charge inside the mill (Craig & Macleod, 1995). If the charge volum exceeds a certain threshold, the mill begins to overload and grinding efficiency decreases in a positive fee b ck mechanism

Jul 22, 2016· These are used in the primary SAG mill at Casposo, Argentina to good effect. This is applicable to mills where ore packing is not an issue. ... maximizing mill throughput and balancing wear life ...

Aug 17, 2020· 12% increase in SAG mill throughput USD $7.5 million per month increase in revenue The Peruvian mines illustrate the benefits of using fragmentation analysis to inform the drill and blast process, improving …

Knowledgescape's mill scanner is the ultimate tool for increasing SAG mill throughput and reliability GrindingExpert™ isn't just about SAG mills Our GrindingExpert™ solutions include ball mill strategies that achieve the target grind size while maximizing throughput, or when the circuit is SAG mill limited, achieve the finest grind.

Jun 06, 2016· However, open circuiting the SAG mill by feeding crushed pebbles directly to a ball-mill circuit is often considered as a technique to increase SAG throughput. An option to do both can allow balancing the primary and secondary milling sections by having the ability to return crushed pebbles to SAG feed as per a conventional flowsheet, or to the ...

Oct 01, 2018· In this case, an AG or SAG mill may be appropriate. For smaller throughput scenarios, a three-stage crushing plus rod mill plus Vertimill may make the most sense. It all depends on the ore ...

Jun 01, 2015· silver. Rio Tinto Kennecott's concentrator is a SAG mill, ball mill and pebble crushing (SABC) circuit with four grinding lines to treat an average throughput of approximately 168 kt/d. Wemco mechanically agitated cells are used for rougher-scavenger duty and the rougher concentrate is treated by column

• Increase SAG mill throughput The Solution The operations implemented the Split-ShovelCam, Split-TruckCam and Split-ShovelCam to measure the rock fragmentation from post-blast product to the SAG mill feed. Blast designs were adjusted to measure the changes in rock fragmentation, equipment efficiency, mill efficiency and throughput.

SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill

enable the operations to maximize the throughput for a set grind target and verify if the grinding circuit is ... SAB circuit with a 7.92 m x 3.78 m 3550 kW SAG mill and 5.49 m x 8.84 m 4475 kW ball mill in closed circuit with 6 hydrocyclones (4 in use, 2 standby). Both mills are fixed speed.

Request PDF | Blast fragmentation for maximizing the SAG mill throughput at Porgera Goldmine | The Porgera joint venture and Dyno Noble have commissioned a joint project to optimise the drill and ...

Based on experience, mill liner designs have moved toward more open shell lifter volumetric capacity and a grate design to facilitate maximizing both pebble-crushing circuit utilization and SAG mill capacity. Mill throughput is maximized with shell lifters between ratios of …

size while maximizing throughput, or when the circuit is SAG mill limited, achieve the ﬁnest grind size possible, thus increasing mineral liberation and recovery. GrindingExpert™ has been shown to typically increase throughput by 3-6% GrindingExpert™. More …

and is one of the reasons why SAG mills and some ball mills utilize variable-speed drives (VSDs). It is this "actuator" — i.e., varying mill speed — that is exploited by SmartMill™ to increase grinding efficiency, reduce energy consumption, increase throughput, decrease particle size variation, reduce overgrinding, improve product

adjusted to maintain mill density in an optimum range. KnowledgeScape - - (801) 784-8161 - [email protected] GrindingExpert™ Ball Mill EfﬁciencyExpert™. Better Grinding. Our ball mill strategies achieve the target grind size while maximizing throughput, or when the circuit is SAG mill limited, achieve the ﬁnest

Feb 20, 2019· When people think of mineral processing and comminution, they tend to focus on equipment like the SAG mill. To get optimal performance from your rock crusher, ball mill and all oth ... A single-minded focus by any of these groups to maximize throughput may come at the expense of other units, and ultimately at the expense of overall throughput.

As an example, Lam et al (2001) used to "mine to mill" concept to maximise the throughput of a SAG mill by adjusting the blast fragmentation. In general, the approach entails changing powder ...

Apr 24, 2014· In order to achieve optimal performance of downstream processes with the finer ROM, a number of changes and adjustments were made to the crusher, SAG and ball mill circuits. The resulting mill throughput averaged 4,100 tph for the three trial blasts, and plant throughput above 4,500 tph was achieved for several hours during these trials.

A client mill ran two periods with different liner designs. The authors tag the two periods with Period 1 and Period 2. Direct comparison between two periods is given in Table 1, which lists throughput, SAG power, and SAG efficiency for the two periods. SAG efficiency is defined by throughput divided by SAG power.

Western Australia, to provide a total plant throughput of 11.6Mtpa. Part of the expansion included increasing the refractory sulphide ore circuit throughput from 5Mtpa to 7.5Mtpa. This was achieved by the installation of a 12MW SAG mill with a diameter of 10.97m (36ft). The mill, when built, was the largest SAG mill operating at

To achieve best performance of downstream processes with the finer ROM, a number of changes and adjustments were made to the crusher, SAG and ball mill circuits. The resulting mill throughput averaged 4,100 mt/h for the three trial blasts and plant throughput above 4,500 mt/h was achieved for several hours during these trials.

May 13, 2020· During operation however, the major variables that determine SAG mill performance are unmeasured and changing. SAG mills perform size-reduction through two major modalities, impact and attrition.

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