Application of model predictive control in ball mill grinding circuit
Abstract. Grinding circuit needs to be stably controlled for high recovery rate of mineral ore and significant reduction of production cost in concentrator plants. Ball mill grinding circuit is ...
Disturbance observer based multi-variable control of ball mill …
To this end, a disturbance observer based multi-variable control (DOMC) scheme is developed to control a two-input-two-output ball mill grinding circuit. The systems considered here are with ...
Hydrocyclone control in grinding circuits
A closed grinding circuit operating calcite of different hardness levels has been simulated. The calculations are based on pilot plant experiments with a ball mill and 150 mm-hydrocyclones. The process conditions are presented in Fig. 4. By varying the other parameters such as hardness, primary feed rate, size distribution of the feed and …
Closed circuit ball mill – Basics revisited
Closed circuit milling flowsheet. The total solids mass flow of the mill discharge is: (2) Q + CQ = Q ( 1 + C) The final product mass flow in the mill discharge is Q / E and the amount of final product in the circulating load is: (3) Q E - Q = Q 1 E - 1. The mass flow of the coarse material in the mill discharge is the difference between the ...
Optimal control of a ball mill grinding circuit—I. Grinding circuit …
Both model predictions and pilot scale ball mill circuit responses are shown. Recommended articles. References (15) V. Borrison et al. Self-tuning control of an ore crusher. Automatica (1976) H.E. Cohen et al. ... Properly controlling comminution circuits is generally acknowledged to be highly profitable for any mining site's bottom line. On ...
Receding-Horizon Estimation and Control of Ball Mill Circuits …
Abstract. This paper focuses on the design of a nonlinear model predictive control (NMPC) scheme for a cement grinding circuit, i.e., a ball mill in closed loop with an air classifier. The multivariable controller uses two mass fractions as controlled variables, and the input flow rate and the classifier selectivity as manipulated variables.
Used-Sala Ball Mill, Type SRR. 1800 mm diameter x
DESCRIPTION. Used-Sala Ball Mill, Type SRR. 1800 mm diameter x 4000 mm long, overflow discharge, 23.4 r/min operating speed. Drive consists of rubberized rollers, speed reducer, sliding clutch, V-rope drive with guard, asynchronous motor type ABB HXR 315 , squirrel cage, 160 kW, 1485 r/min, 380V, 50 hz, IP 54. Manufactured 1993. ITEM …
Modeling and Simulation of Whole Ball Mill Grinding …
The experiment process is that the operators control the value of three grinding variables to achieve a target grinding particle size (GPS) on the ball mill …
Receding-Horizon Estimation and Control of Ball Mill …
A typical cement grinding circuit is represented in Figure 1, which consists of a single-compartment ball mill in closed loop with an air classifier. The raw ma-terial flow q C is fed to the rotating mill where tumbling balls break the material particles by fracture and attrition. At the other end, the mill flow q M is lifted
Fuzzy logic-based supervisory control of ball mill …
Grinding circuit should provide stable particle size distribution while operating in a way to maximize mill efficiency. In this paper, a fuzzy logic-based …
GitHub
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Reducing the energy footprint of grinding circuits: the process control
Specific energy consumption at rod and ball mills For all considered control strategies, solids fractions in the circuit are allowed to fluctuate. ... Wei, D. and Craig, I.K. (2009). Grinding mill circuits - a survey of control and economic concerns. International Journal of Mineral Processing, 90(1-4), 56â€"66. Proceedings of the 20th ...
Neurocontrol of a ball mill grinding circuit using …
The generalisation afford by the SANE algorithm to the neurocontroller in dealing with considerable uncertainty in its operating environment attests to a large degree of controller autonomy. INTRODUCTION Ball mill grinding circuits are the primary unit operation in the production of metals from ore, as it precedes a concentration operation such ...
An Improved Control Strategy for Ball Mill Grinding …
An improved control strategy is proposed to control ball mill grinding circuits for energy saving and pollution reduction. A two-layer optimization architecture combined by particle …
Ball Mill Grinding Circuit Based on MPC and EID
In order to achieve satisfactory performance in controlling complex process operation in the presence of heavy disturbances and large uncertainties, equivalent input disturbance …
(PDF) Control of ball mill grinding circuit using model predictive
Ball mill grinding circuits are essentially multi-variable systems characterized with couplings, time-varying parameters and time delays. The control schemes in previous literatures, including detuned multi-loop PID control, model predictive control (MPC), robust control, adaptive control, and so on, demonstrate limited abilities in control ball …
Fuzzy logic-based supervisory control of ball mill grinding circuit …
Grinding circuit should provide stable particle size distribution while operating in a way to maximize mill efficiency. In this paper, a fuzzy logic-based supervisory control strategy is proposed for controlling product particle size while improving mill efficiency in a ball mill grinding circuit. In the supervisory level, fuzzy logic-based …
Supervisory expert control for ball mill grinding circuits
The supervisory expert control for ball mill grinding circuits is a SCADA system, which consists three levels, the first level instrumentations and actuators, including particle size analyzer, flow meters, valves, etc, level 2 regulating system composed by programmable logic controllers (PLCs), and level 3 supervisory system.
Closed Circuit Grinding VS Open Circuit Grinding
Closed Circuit Grinding VS Open Circuit Grinding. The simplest grinding circuit consists of a ball or rod mill in closed circuit with a classifier; the flow sheet is shown in Fig. 25 and the actual layout in Fig. 9. This single-stage circuit is chiefly employed for coarse grinding when a product finer than 65 mesh is not required, but it can be ...
Model based supervisory control of a ball mill grinding circuit
The grinding circuit ( Fig. 1) used for the present study is part of a copper concentrator plant. The system consists of a ball mill, hydrocyclones, pulp sump and associated pumps and solids feeding conveyors. The feed, copper ore (from primary crusher, size 3 in) is fed into the ball mill by vibratory conveyors.
Optimal control of a ball mill grinding circuit—II. Feedback …
DOI: 10.1016/0009-2509(91)80194-4 Corpus ID: 110530939; Optimal control of a ball mill grinding circuit—II. Feedback and optimal control @article{Rajamani1991OptimalCO, title={Optimal control of a ball mill grinding circuit—II.
Autogenous Mill | SpringerLink
The autogenous mill will grind the material to the extent that the content of the particles with particle size <0.074 mm accounts for 20–50% of total quantity of product, and crushing ratio is 4000–5000, which is over 10 times that of ball mill and rod mill. The maximum particle size of the lump ore fed into autogenous mill is 300–350 mm.
Predicting Particle Size Distributions in Open & Closed Circuit Mills
Input/output PSD data were taken from a closed-circuit industrial ball mill at the Twin Buttes operations of the ANAMAX Mining Company. The difference in open-circuit PSD is somewhat more pronounced at the longer retention time. The overall residence time distribution in the closed-circuit mill is totally dominated by the hydrocyclone recycle.
Control of ball mill grinding circuit using model …
Process description. The laboratory grinding circuit consists of an overflow type ball mill (30 cm × 30 cm), a sump fitted with a variable speed pump and a …
Measurement system of the mill charge in grinding ball mill circuits
An industrial ball mill operating in closed-circuit with hydrocyclones was studied by five sampling surveys. The aim of the present study was to optimise operating parameters (i.e. charge volume, make-up ball size regime, slurry mean residence time, number of hydrocyclones in operation and hydrocyclone's feed solids content (Sf)) with respect to …
Disturbance observer based multi-variable control of ball mill …
Ball mill grinding circuits are essentially multi-variable systems characterized with couplings, time-varying parameters and time delays. The control schemes in previous literatures, including detuned multi-loop PID control, model predictive control (MPC), robust control, adaptive control, and so on, demonstrate limited abilities in control ball …
Grinding in Ball Mills: Modeling and Process …
Abstract and Figures. The paper presents an overview of the current methodology and practice in modeling and control of the grinding process in industrial ball mills. Basic kinetic and energy ...
Sala Sala Ball Mill Controlling Circuit
sala ball mill controlling circuit Ball Mill Grinding Circuit Ball Mill Get Price Robust Model Predictive control of Cement Mill circuits. The present work considers the control of ball mill grinding circuits which are The performance of the same controller MPC applied to a cement ball milling circuit with large Limon D. T. Alamo F. Salas and E ...
OneMine | Primary Ball Mill Circuits
Introduction Automatic control of primary ball mill circuits has received much attention over the past decade, primarily because its advantages ultimately can be translated into economic terms. Apart from such obvious benefits as improved product quality, increased throughput, and more stable operation, less direct benefits such as easier operation, …
Grinding Circuit Control Strategy
The grind index is calculated performing a mass balance around the ball mill circuit to estimate the cyclone overflow density (viscosity effect) and a correction factor due to specific power …