Each milling circuit is unique, and as such the goals and most optimal control strategy might differ for individual cases. Process IQ is an expert in implementing control systems for SAG and Ball milling circuits, making use of advanced stabilisation and optimisation strategies developed by Mintek.(PDF) OPTIMIZATION OF THE SAG MILL CIRCUIT AT KINROSSOPTIMIZATION OF THE SAG MILL CIRCUIT AT KINROSS PARACATU BRAZIL from ore characterization, through SAG mill practices and finally ball mills and BATU HIJAU MILL THROUGHPUT OPTIMIZATION: MILLING than summarized here). The higher ore BWi, the more frequent the milling circuit is Ball Mill limited (the year of 2013 was extreme one). The lower ore BWi, the milling circuit is more SAG Mill limited. an According to the long term mine plan schedule, the frequency and durations of treating higher BWi oresOptimizing Performance of SABC Comminution Circuit of theThis research is focused on the Phase I SABC milling circuit of the Wushan porphyry copper mine. Improvements to the existing circuit were targeted without any significant alterations to existing equipment or the SABC circuit. JKSimMet simulations were used to test various operating and design conditions to improve the comminution process.Advanced Controller for Grinding Mills: Results from aore per day in six overflow ball mills. The concentrate is transported to a smelter a few miles away. The crushed ore from primary and secondary ores is conveyed into bins. The ore from the bins is fed into the ball mill using a conveyor belt. The ball mill grinding circuit is illustrated in Figure 2. % Solids 78.9 Circulating Load 474% AdvanceOptimizing Secondary Grinding Circuits with real-timeand the circuit product (i.e. cyclone overflow particle size). With the development of CYCLONEtrac PST comes the commercial availability of a robust on-line particle size measurement allowing for the development and optimization of particle size control schemes that can take advantage of this trade-off within the circuit constraints.

A survey of a SAG-ball mill circuit processing ore from primary crushing showed size reduction of circuit (SAG) feed F 80 of approximately 165,000 µm to flotation circuit feed (cyclone overflow) P 80 of 125 µm. The total specific energy input for the two milling stages was 14.6 kWh t −1. Calculate the operating work index for the circuit.COMMINUTION CIRCUIT OPTIMISATIONchanges are simulated in order to quantify the potential benefits and rank options according to their merit. Table 1 provides some examples of optimisation projects undertaken by OMC. Table 1 OMC Optimisation Project Examples Project Circuit Modifications Improvement Ref. Henty (2003) Change SAG mill ball size. Increased cyclone diameter.Mine-to-process integration and optimizationMine-to-process integration and optimization. Understanding ore body characteristics allows for the optimization of operating strategies, maximizing overall profitability. Blast fragmentation has a significant impact on downstream comminution. Likewise, grind size strongly affects subsequent separation stages.Optimizing Performance of SABC Comminution Circuit of theThis research is focused on the Phase I SABC milling circuit of the Wushan porphyry copper mine. Improvements to the existing circuit were targeted without any significant alterations to existing equipment or the SABC circuit. JKSimMet simulations were used to test various operating and design conditions to improve the comminution process.Optimizing Performance of SABC Comminution Circuit of thecircuit performance using the JKSimMet simulation model. This included the bench-marking and optimization of the SABC comminution circuit, focusing on the primary (SAG mill) and secondary (ball mill) grinding mills, and estimating the outcomes of changes to circuit operating parameters (e.g., feed rate, mill load, ball charge, etc.). 2.Optimizing Secondary Grinding Circuits with real-timeand the circuit product (i.e. cyclone overflow particle size). With the development of CYCLONEtrac PST comes the commercial availability of a robust on-line particle size measurement allowing for the development and optimization of particle size control schemes that can take advantage of this trade-off within the circuit constraints.

a single-deck screen and a cone crusher while the ball mill circuit utilizes the primary crusher performance and proper control of the ratios for the SAG mill feeders drawing the ore from the stockpile. 3.4.6 Simulation and Optimization of Grinding Circuits .. 70 3.4.7 ComminutionMultiobjective optimization of an industrial grindingJan 01, 2004· The ore from the mine is crushed in the crushing unit and is sent to storage fine ore bin. Fresh ore feed from the fine ore bin along with water is fed to the rod mill. The rod mill discharge slurry is mixed with the ball mill discharge slurry in a sump known as the primary sump. Water is added to the primary sump to reduce the pulp density.Benefits of optimisation and model predictive control on aBenefits of optimisation and model predictive control on a fully autogenous mill with variable speed exhibits highly non-linear behaviour in addition to being subject to unmeasured variability associated with most ore bodies. Anglo American Platinum aimed at improving online optimisation of the circuit by implementing industrial modelOptimization of mill performance by usingOptimization of mill performance by using online ball and pulp measurements by B. Clermont* and B. de Haas* Synopsis Ball mills are usually the largest consumers of energy within a mineral concentrator. Comminution is responsible for 50% of the total mineral processing cost. In today’s global markets, expanding mining groups are tryingOptimizing and evaluating the operational factorsHence, this study was focused on the modelling and optimization of some of the parameters affecting the gold cyanidation process. This research was carried out on Aghdareh gold ore. The Aghdareh mine and gold processing plant is located 32 km from Takab city in the western Azerbaijan province, Iran, at 46°58′30′′N and 36°39′29′′E.Increased production and energy efficiency for optimizedApr 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.

Following implementation of these strategies, SAG mill throughput when treating the harder copper/zinc ores increased from a target of 2,750 mt/h in 2007 to 4,000 mt/h in 2009 and 4,400 mt/h in 2010-11. Optimization of the overall process also resulted in less energy consumption per ton of product. Continuous Improvement Delivers Further BenefitsGrinding Circuit Practices at Newmont OneMineOct 10, 2016· This paper provides an overview of Newmont’s diverse comminution circuits, discusses recent performance and offers some insight into optimisation and design considerations based on recent experience in both endeavours.Citation:Giblett, A and Hart, S, 2016.Evaluation of grinding circuits for iron oreThe final product of the grinding circuit where the mills were operated in series, was composed of the overflow from the three hydrocyclones operated in the circuit, with P 80 =0.104mm. For the circuit with the ball mills in parallel, line B, each ball mill was fed with 499t/h at 64.7% solids, P 80 = 3.714mm and the mill discharge P 80 =0.153mm.Optimization of Comminution Circuit Throughput and ProductThe mathematical models were used to simulate novel circuits for minimizing overgrinding and increasing throughput, and it is estimated that a single plant grinding 15 million tons of ore per year saves up to 82.5 million kWhr/year, or 8.6 x 10{sup 11} BTU/year.Mine-to-process integration and optimizationMine-to-process integration and optimization. Understanding ore body characteristics allows for the optimization of operating strategies, maximizing overall profitability. Blast fragmentation has a significant impact on downstream comminution. Likewise, grind size strongly affects subsequent separation stages.Optimizing Performance of SABC Comminution Circuit of thecircuit performance using the JKSimMet simulation model. This included the bench-marking and optimization of the SABC comminution circuit, focusing on the primary (SAG mill) and secondary (ball mill) grinding mills, and estimating the outcomes of changes to circuit operating parameters (e.g., feed rate, mill load, ball charge, etc.). 2.

Benefits of optimisation and model predictive control on a fully autogenous mill with variable speed exhibits highly non-linear behaviour in addition to being subject to unmeasured variability associated with most ore bodies. Anglo American Platinum aimed at improving online optimisation of the circuit by implementing industrial modelOptimization and Performance of Grinding Circuits: Thea single-deck screen and a cone crusher while the ball mill circuit utilizes the primary crusher performance and proper control of the ratios for the SAG mill feeders drawing the ore from the stockpile. 3.4.6 Simulation and Optimization of Grinding Circuits .. 70 3.4.7 ComminutionMultiobjective optimization of an industrial grindingJan 01, 2004· The ore from the mine is crushed in the crushing unit and is sent to storage fine ore bin. Fresh ore feed from the fine ore bin along with water is fed to the rod mill. The rod mill discharge slurry is mixed with the ball mill discharge slurry in a sump known as the primary sump. Water is added to the primary sump to reduce the pulp density.Optimization of Comminution Circuit Throughput and ProductThe mathematical models were used to simulate novel circuits for minimizing overgrinding and increasing throughput, and it is estimated that a single plant grinding 15 million tons of ore per year saves up to 82.5 million kWhr/year, or 8.6 x 10{sup 11} BTU/year.Evaluation of grinding circuits for iron oreThe final product of the grinding circuit where the mills were operated in series, was composed of the overflow from the three hydrocyclones operated in the circuit, with P 80 =0.104mm. For the circuit with the ball mills in parallel, line B, each ball mill was fed with 499t/h at 64.7% solids, P 80 = 3.714mm and the mill discharge P 80 =0.153mm.Optimization of mill performance by usingOptimization of mill performance by using online ball and pulp measurements by B. Clermont* and B. de Haas* Synopsis Ball mills are usually the largest consumers of energy within a mineral concentrator. Comminution is responsible for 50% of the total mineral processing cost. In today’s global markets, expanding mining groups are trying

flotation circuits includes measures, such recovery, as well as new flotation measures, such as ore floatability, bubble surface area flux and froth recovery. Such circuit optimisation is a powerful tool in achieving the best possible flotation performance. Outotec’s HSC Chemistry software,Optimization of hydrocyclone classification by on-lineIn the mining of metals, such as copper, the ore is commonly processed in a concentrator. The concentrator typically consists of two main functions. These are the grind circuit and the flotation system. In the grind circuit the ore is crushed to anoptimum particle size distribution to Integrated advanced process control with a sag millThis paper demonstrates the operational benefits of an advanced control system with integrated advanced mill performance monitoring instrumentation. Production performance and circuit stability were significantly better when the circuit was operated with both systems ON.Optimization Process at Antamina Boosts Production andFollowing implementation of these strategies, SAG mill throughput when treating the harder copper/zinc ores increased from a target of 2,750 mt/h in 2007 to 4,000 mt/h in 2009 and 4,400 mt/h in 2010-11. Optimization of the overall process also resulted in less energy consumption per ton of product. Continuous Improvement Delivers Further BenefitsChapter M MODELLING, SIMULATION, OPTIMIZATIONmill in closed circuit with the existing hydrocyclone package. In all simulations, SAGT, CYCL and MILL models were selected to simulate SAG mill, Hydrocyclone packages and ball mill units. SAGT and MILL models both are based on the population balance model of grinding process. CYCL model is based on Plitt’s empirical model of classificationSRK News #48 SRK ConsultingMine-To-Mill Optimisation: Effect Of Feed Size On Mill Throughput. Adrian Dance. Designing a leach circuit should consider both ore-specific factors as well as factors involving the interaction between the ore and process equipment. Learn More. Yellowknife Gold Project. Eric Olin.

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