Grinding control strategy on the conventional milling circuit With the increase in ratio set point a decrease in Cyclone 1 Circulating load control The only manipulated variable available in the closed milling circuit ball mill 2 is the cyclone dilution water flow rate Attempts to use this for density control were not successful
Apr 01 2008 stable control of particle size in ball mill grinding circuits is of great importance for the recovery of the valuable minerals and the maximization of mill capacity is another main consideration in concentration plants in recent years advanced control strategies to improve mill capacity have become hot topics
3 control strategy presence of right amount of material inside the ball mill improves efficient grinding of the clinkers a lesser amount of material in the mill causes not only wear and tear of the equipment but also reduces the productivity on the contrary a larger amount of material in the mill leads to the phenomenon called plugging
The results in sagmill line 2 are even more dramatic because of segregation on the coarse feed stockpile sagmill 2 receives a higher percentage of coarse material the knowledgescape strategys ability to maintain smooth and stable operation of the mill was more apparent when contrasted to the dcs control on the difficult line
Jul 01 2009 ball mill grinding circuits are essentially multivariable systems characterized with couplings timevarying parameters and time delays the control schemes in previous literatures including detuned multiloop pid control model predictive control mpc robust control adaptive control and so on demonstrate limited abilities in control ball mill grinding process in the presence
16 mar 2013 grinding in ball mills modeling and process control an improved control strategy for ball mill grinding circuits know more yianatos jb lisboa ma baeza dr grinding capacity enhancement by solids concentration control of hydrocyclone underflow minerals engineering 15
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
Sep 06 2010 automatic control of the ball grinding mill powder size of purpose is to control the ball mill the possible to improve the quality of products of powder using the computer control
Supervisory expert control for ball mill grinding 200841 the typical grinding circuits operate in a closed loop as shown in fig 1 which consists of a ball mill a pump sump hydrocyclones and associated pumps and solids feeding conveyors download download fullsize image fig 1process diagram of grinding process
Process control in ball mill grinding circuits process control in ball mill grinding circuits we are a largescale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment milling equipment mineral
Range of sag ball and rod mills for capacities under 31 mw mill control system the optional outotec mill control system features the latest in stateoftheart technology and is the preferred control option for all outotec grinding mills it comprises a local control
The grinding efficiency of ball mill is low the treatment capacity is low the production energy consumption is high the product fineness is unstable and so on which are the problems that most concentrators will encounter how to effectively improve the grinding efficiency of ball mill is an important problem this article summarizes 10 ways to improve efficiency if you are worried about
Jul 04 2013 operation aim of ball mill grinding process is to control grinding particle size and circulation load to ball mill into their objective limits respectively while guaranteeing producing safely and stably the grinding process is essentially a multiinput multioutput system mimo with large inertia strong coupling and uncertainty characteristics
Section class abstract h2 class abstracttitle texttitle my1 id d1588e2 abstract h2 p the paper presents an overview of the current methodology and
Grinding in ball mills modeling and process control grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical mechanical and chemical characteristics
Grinding mill and flotation control mipac improve the stability of the grinding sag ball mills and flotation plant conventional and jameson cells through improved instrumentation and control strategies mipac scope design install and commission control loop in grinding and flotation plants sag circuit mill baasrodevabe
Form for assisting the design of control strategy and the systemlevel test of the control system implementation new tools are required for the simulation 21 ball mill grinding process and
A ball mill grinding circuit is a nonlinear process characterised by significant process interaction as a typical manipulated variable interacts with multiple controlled variables to facilitate an accurate representation of the complex process dynamics a rigorous ball mill grinding circuit is simulated the dynamic model is used in its entirety
There the effect of a trunnion magnet system on the ball mill was significant total mill feed remained essentially unchanged averaging approximately 1300 th however total mill power consumption dropped 8 from an average of 7600 kw to 7000 kw the mill work index dropped 10 from an average of 55 kwhrt to 5 kwhrt
The specific variables to be accommodated and the best strategy to control the grinding process will depend on the actual process circumstances and the type of mill and drive involved in modern grinding ball mills and sag mills are two types of mill commonly found grinding mills ball mills
Grinding techniques improved grinding mill china ball mills and vertical milling technologies will all be included with operator training on improved grinding techniques grinding
Ic energy consumption of the ball mill for preparing standard body slip and ball mill maxxmill for preparing of 55 h and 6 h preground body slips were measured the data showed that pregrinding the slip for 55 and 6 h in the ball mill and then further grinding the slip in the maxxmill to the sieve residues of 64 and 55 over 45 m
As part of the control strategy definition nkomati and flsmidth worked together to identify the key process measurements required for control it was decided to split the application into two main modules the primary grinding circuit comprising the ag mill and pebble crushers and the secondary grinding circuit comprising the ball mill sump
This paper shows a strategy for the fuzzy logic control system using an offline simulated ball mill grinding approach in this study a step change in the force reference signal is considered a disturbance the current study focuses on the design and implementation of a fuzzy logic control system for product flow rate of ball mill grinding process
Sep 06 2010 1 the principle of automatic control system for milling process overview automatic control of the ball grinding mill powder size of purpose is to control the ball mill the possible to improve
The knowledgescape adaptive control solutions work together to see listen and think about the best way to increase tonnage and optimize sag and ball mills at all times and for all conditions our expert control ball mill strategies automatically adjust sump water and mill water addition mill speed where available and can open and close
Thats because it has two kind of grinding modes dry process and wet process customers can control the capacity and final products fineness by adjusting the diameter of the ball the final products can be adjusted between 0074mm to 04mm according to customers requirement improve the crushing rate of ball mill
Aug 27 2007 abstract grinding circuit must provide stable particle size distribution and should also operate in a way to maximize mill efficiency fuzzy logic based online optimization control integrated in an expert system was developed to control product particle size while enhancing mill efficiency in a ball mill grinding circuit
Water impacts the grinding process therefore the efficiency of the ball mill can be greatly improved by better water dosage this alone could improve the efficiency with 515 according to 911 mettalurgist when this is combined with a control strategy the improvement rate could be even higher
3 modifying control strategies where needed longerterm mill internals can be adjusted to optimise performance under the new ag milling configuration converting grinding circuits to singlestage operation ag mill operating only ball mill switched off requires some modifications to the piping layout and circuit operating philosophy
Sgi leads the market with technical design and quality control of sag and ball mill grinding media production our approach is to work with customers to improve performance by decreasing steel consumption decreasing cost per tonne of ore milled improving grind particle distribution and increasing throughput see more on our products page