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Save power, grinding media, and linear wear while increasing capacity.
The range of mill sies and versatile applications allow SAG milling to be accomplished with fewer lines than conventional set-ups. This, in turn, contributes to lower capital and maintenance costs for a SAG mill circuit.nbsp.
SAG milling extends itself to many applications due to the range of mill sies available. Theynbspcan accomplish the same sie reduction work as two or three stages of crushing and screening, a rod mill and some or all of the work done by a ball mill.
SAG mills are also an optimum solution for wet grinding since crushing and screening in these cases can be difficult, if not impossible.nbsp.
Metsorsquos process engineers will assist you in creating an efficient software-driven process, from circuit design to start-up and optimiation, to ensure you get your desired grinding results.
Through automatic operation it is possible to save power, grinding media, and linear wear, while increasing capacity.
Metso Qdx4TM mill drive provides the next step in the evolution of change in mill drive architecture, while allowing the system to be built with components that are within current manufacturing capabilities. We are essentially providing up to twice the power transmission of a conventional dual pinion drive.
An economically appealing method for improving operations is available without the capital expenseget more out of a mill by applying the advanced control capabilities in the existing plant control system By Andrew Thornton.
Modern plant control systems PCS whether Programmable Logic Controllers PLC or Distributed Control Systems DCS, are extremely powerful process control and automation engines. In the mining industry these systems are used extensively for basic control functions, yet their use for more advanced process control is surprisingly less common. This is wasteful of the capabilities inherent in the PCS, as the use of advanced control in the PCS to stabilie and optimie mineral processing plants can lead to significant economic benefits.
Researchers from the Sustainable Minerals Institutes Julius Kruttschnitt Mineral Research Centre JKMRC say they are developing a soft sensor to overcome previously-accepted performance challenges facing SAG mills. SAG mills are a key asset for mineral processing operations as one of the critical stages of extracting mineral out of ore, and.
SAG mill liners from Multotec use rubber composite components to provide superior impact and wear resistance in all semi-autogenous milling applications.... to optimise your mineral processing plant. Large stockholdings amp fast delivery of equipment and spares to support your plant.
Optimie underperforming assets and remove the need for capital expenditure Optimal control of the SAG mill can be achieved by using existing DCS or PLC.
It is commonly assumed SAG mill control can only be successfully implemented using black-box solutions this is just not true. Black-box solutions are referring to advanced control algorithms or solutions which are contained in a separate computer, interfaced to the PCS. Another common name is off-the-shelf solutions, which is a misnomer since these systems require a considerable amount of setup and configuration.
SAG mill control fundamentally means managing the load in the mill by adjusting the feed rate of ore to the mill andor manipulating the rotational speed of the mill. The best way to measure load is to mount the mill on load cells. The load cells are calibrated to measure the total weight of water, grinding media balls and ore in the mill, but not the weight of the mill itself. 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 MMGs Century Zinc operation in Australia is shown in the chart found on pg. 32. In this case, mill speed is the primary manipulated variable used to control mill load. While there is no generic control strategy for SAG milling there is a considerable amount of reusable engineering.
In contrast to an expert or black box system, the control loop approach was built using standard blocks, connected as shown. This control strategy has been in operation since January 2007 and controls the mill with minimal operator involvement over 95 of the time. For more information on this project, please contact the author.
Almost invariably the AG, SAG and Ball mill liner lives dictate the shut-down dates of the concentrator. The replacement of the mill liners determines the length of each concentrator shut-down. In other words, the liner lives and their replacement, define the time available for mineral processing.
The mill will be driven by a Gearless Motor Drive GMD which at 28.0 MW is equal to the largest grinding mill power ever used in the mining industry. The SAG mill design is based on Outotecs proprietary grinding mill technology, developed over decades for maximum reliability and performance.
SAG Mills. ZJH Minerals is professional manufacturer for the SAGAG mills. It used for the feeding of less than 400mm,and the discharging is the materials autogenous grinding of 5-0.074mm,and used for the dry and wet crushing,grinding of the non-ferrous ore and the black ore, the nonmetal liner plate can be used for the iron free grinding.One end supported by the roller bearing, simple.
SGI specialies in designing cost-effective site-specific grinding media solutions.
SAG mill liners from Multotec use rubber composite components to provide superior impact and wear resistance in all semi-autogenous milling applications.
Multotec uses specialised MilTraj software and Rocky DEM when designing your SAG mill liners. This ensures that the liner is appropriate to the mineral being processed as well as its wear rates.
Our SAG mill liners are custom designed to your application requirements. In applications that feature large ball and feed sies as well as with large mill diameters, Multotec supplies MultoMettrade or HD MultoMettrade SAG mill liners and heavy-duty grate plates.
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