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Model Predictive Control for SAG Milling in Minerals Processing | 5 Model Predictive Control on a SAG Mill and Ball Mills The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure.
Evaluation of MPC strategies for mineral grinding. Author links open overlay panel Pablo Karelovic * Roberto ... Manipulated variables for this controller are fresh ore feed to the SAG mill, watertoore ratio and SAG mill speed for the first stage; sump water feed and pump speed for each line of the second stage. ... Figure 3 shows the results ...
His interests cover liner design, SAG mill modelling and control, the unified comminution model (UCM), ore characterisation for multicomponent modelling, and Flexible circuits to utilise today ...
UQ eSpace University of Queensland. AG mills exclusively use ore as grinding media, while in SAG mills steel balls are ... between the various components inside an AG/SAG mill in terms of particle breakage, transportation and ..... Mechanistic Breakage Energy Calculation .
ore hardness. The SAG mill product is then crushed to passing mm and is subjected to ... Figure 1 highlights ores from two different projects with both soft and hard SAG milling components to grind from a feed F80 of 152 mm to a P80 of mm. The soft ore is characterized by 2 kWh/t and
Through continuous improvement and the use of advanced technologies like SmartEar™, Pueblo Viejo are improving the control and operation of their SAG mill, resulting in reduced liner wear, more Title: 12th Mill Operators'' Conference 2014 Semiautogenous grinding (SAG) mill co
Applying grindcurves to mill operation and optimisation Powella,*, van der Westhuizenb, ... Clearly this must have implications for mill control, as depending upon the ore type and ball load, the peak ... sag hard oc ag hard oc sag soft oc sag soft cc
Our unique Outotec TPL™ technology improves grinding process efficiency – the primary grinding process can be intensified for hard ores and material transport can be improved for soft ores. TPL is an environmentally friendly technology used to achieve higher energy efficiency from the grinding mill.
CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The difficulty of stabilizing SAG mill load limits the effectiveness of feedback control approaches. Control is particularly difficult during periods when the feed ore is either unusually hard or fine. There is also a strong tendency to lose control during transient periods when feed ore changes.
A structured approach to the evaluation of the energy ... SciELO SA. for processing cement, diamonds, and iron ore. (Broeckmann and ... and SAG mill circuits in hard ore ... complete comminution circuits using SAG mill and HPGR.
Dec 11, 2016· Model Predictive Control for SAG Milling in Minerals Processing. or compounds trapped in the mined ore, so that these can be further considered an intermediate crushing and grinding of ore Ore ...
AbstractA detailed test work was carried out with an industrial semiautogenous (SAG) mill in a copper plant in close and open circuits to specify the effects of ore characteristics and operational...
Jul 11, 2017· If the ore suddenly goes from very hard to very soft, the cyclone underflow is recycled to the primary mill to maintain a liner protecting load until the ball charge is ground down or the mine can supply some competent rock. This also reduces the load on the ball mill .
Second, for demandside management, a feed hardness array is generated by mixing two normal distributions with different standard deviation and mean values, representing a hard and soft ore. And third, realistic SAG mill feeds are generated with geostatistical simulations.
Hard and Soft Rock Mining Screening Primary Crushing Coal Preparation ... Concentration Classification Water Tailings Pond Flotation Separation Conditioning Grinding Water SAG/Ball Mill Primary Crushing Ore Storage Leaching Leached Solution Dryers ElectroWinning Solvent Extraction Electrolyte ... – Drives and process control systems ...
The semiautogenous grinding (SAG) mill at the Phoenix Mine is the largest SAG mill in the United States. "This is a lowgrade deposit, so volume is what makes up the difference," said Phoenix ...
Apr 24, 2014· Increased production and energy efficiency for optimized Antamina mine. ... control, ore dilution and environmental aspects. ... Two antennas were installed at Antamina – one on the primary crusher product belt and the other on the SAG mill feed belt – thus allowing the performance in the crushing and milling circuit to be linked to the ore ...
Outotec® Grinding technologies With over 100 years experience in grinding technology, Outotec is one of the largest mill suppliers in the world. Outotec''s dedicated team of grinding specialists provide design engineering, testing and analysis in order to select the mill best suited to .
SAG Mill Control: It Shouldn''t be that Hard An economically appealing method for improving operations is available without the capital expense — get more out of a mill by applying the advanced control capabilities in the existing plant control system By Andrew Thornton
JKTech Laboratory Services JK Drop Weight Test ... characteristics of a sample of ore in an AG/SAG mill. In an AG/SAG mill, there are two main mechanisms of breakage: impact (high energy) and abrasion (low energy). ... Hard Hard Soft Soft
ore hardness. The SCSE was developed by extensive modelling over a range of A*b, ta and SG values, using the concept of a ''standard'' SAG mill with pebble crusher circuit. The JK Bond Ball Mill (JKBBM) test, is a locked cycle grindability test conducted using a standard laboratory Bond Ball Mill with the same steel ball charge and
present both in the ore feed system and within the mill itself. Additionally, BrainWave automatically adjusts its control settings to allow for different operation due to changes in ore hardness over time. With improved SAG mill control stability, the mill load can be optimized to increase crushing performance and production capacity.
Autogenous Grinding Circuits. When an ore is hard and competent, there is always the possibility that it would make good "pebbles" which could be used for fine grinding media. Different methods that have been tried using combinations of autogenous, semiautogenous, pebble and/or ball mills. The flowsheets shown are typical of the properties ...
SAG precrush Precrushing provides relief to the grinding circuit. It increases efficiency within the SAG mill, increasing overall throughput, or enabling the existing level of throughput to be maintained when ore hardness increases. Good design considers the best selection of crusher and screen to fit the plant layout. Ore sorting
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