ZhengZhou, China
Aug 01 1992 e agsag mill theory text and graphics explaining grinding definitions the fundamentals of ag and sag mills mill control strategies techniques for handling problems with overviscous pulps and effects of variation of mill speed ball load and total mill charge on.
Egl sag mill driven by a 24000 kw gearless drive the sag mill feeds two flsmidth ball mills each 26 ft in diameter 40 ft long egl each driven by a 16400 kw drive the sag mill is one of the largest volumetric capacity sag mills in the world and represented the first 40 ft sag mill in peru garcia amp villanueva 2013
2 sag mill rules – evaluate the sag mill and ball mills weights and power draws and adjust accordingly 3 ball mill rules – increase or decrease feeds based on weights and power draws effectively the rules base acts as an envelope around the modelbased optimizer it acts as a check on outputs before they
A sag mill trommel screen lets you control the true discharge size of your sag mill or the transfer size to the downstream ball mill circuit a well sized trommel should not let rocks pass to the ball mill if they are to be more than say 58″ or 16mm in the image case below strangely enough is the mill shell liner and discharge grate
Agsag mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work of a ball mill because of the range of mill sizes available agsag milling can often be accomplished with fewer lines than in a conventional rod millball mill circuit a diagram of types of agsag
As well as ever larger sag mills ball mills are also expanding in size in the late 1990s the trend moved towards using gmds to power these larger ball mills as well as using the drive to vary the speed gmds quickly moved from 20’ ball mills expanding to 24 25 and then 26’ mills in early 2010 abb commissioned the first gmds for two 27
Aug 01 1992 e agsag mill theory text and graphics explaining grinding definitions the fundamentals of ag and sag mills mill control strategies techniques for handling problems with overviscous pulps and effects of variation of mill speed ball load and total mill charge on
Aug 25 2004 we have an application in a sag mill where we have installed an electronic ear in order to listen the noise produced by the balls falling to the bottom of the mill our idea is to convert the amplitude and frequency of noise to a 420ma signal or something else in order to determine if the ball is crushing the mineral or the mill
Both the ball mill and the sag mill can process nonmetals ferrous metals nonferrous metals rare metals etc and are divided into dry and wet types to meet the needs of various materials the structure of the ball mill and sag mill is similar in the rotary system the
Brakes for grinding mills ball amp sag mills korpak specializes in the design engineering selection packaging and servicerepair for industrial braking systems for grinding mills used in mining applications including ball and sag
Control are discussed the rom sag mill circuit—a brief description the typical rom sag mill circuit is depicted in figure 1 the circuit is usually closed with either a screen or more commonly a cyclone for product size classification the focus of control can be divided into two parts viz
Control the performance of autogenous grinding ag mills ball mills and cyclone classifiers control of power draft and mill load in ag and sag mills has traditionally been by load cells
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
Keywords ball mills grinding circuit process control i introduction 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 typical examples are the various ores minerals limestone etc
Lg a mill power equation for sag mills minerals and metallurgical processing feb 1990 pp5762 gross power no load power net power drawn by the charge 813 the net power is calculated from net power kd25l e c watts 814 in equation 814 d is the diameter inside the mill liners and le is the effective length of the mill including the
Outotec’s scope of delivery includes two grinding mills a semiautogenous sag mill and a ball mill the deliveries will take place in 2021 and production is expected to begin during the same year our unique grinding technology such as the outotec polymer hydrostatic shoe bearing hsb system will provide excellent benefits to the
Prior to the sag mill control system being implemented the control room which over looks the sag mill and the ball mills to produce a grinding product selected by the control room
Sag mill 24’ diameter 2240 kw variable speed double deck vibrating screen 8’ x 16’ sandvik cone crusher hydrocone h4800 250 kw asri gap control 6 x 15 krebs gmax cyclones ball mill 14’ dia x 21’ 2240 kw flotation underground storage bins a b wipfrag feed size measurement
Sag mill control it shouldn’t be siemens also supplied the gearless drives for a 36ft sag mill with a rated power of 15 mw and a 26ft ball mill with 155 mw of rated power recently installed at the minera los pelambres copper operation in chile these large powerful gearless drive mills require improved control systems ranging from
Sag mill grinding circuit control system block diagram sound level read more gold ore ball mill grinding processjiangsu zhongbo machinery 28 feb 2014 p semi self mill cylinder display product or service and ball mill controls cyclone slurry concentration and ball mill operates while in when the ball mill rotates
Sag mill section and ball mill section calculated power draw of approximately 8595 kw 11521 hp sag and ball mill controls – crusher south africa improved sag mill control sag mill control it shouldnt be that hard so in summary why use the existing plant control system to improve sag mill
Sag mills are primarily used at gold copper and platinum mines where steel balls are used for the grinding the manta controls advanced control system called the sag cube automatically monitors and controls a sag mill keeping track of critical process variables impacting mill
Sankyo ball mill electronic ear which listens to the sound level generated by a sag mill and provides an get price calibration electronic ear sag mill ukoverseasstudyuk sag and ball mills have grown in size and there are now many operational mills this effect is the basis of the electric ear patented by hardinge to control the get
Specializing on the ball mill sag mill ag mill designing and supplying for the mining industry the zmi team of mechanical engineers skilled machinists and nondestructive technicians ensure and enforce excellent manufacturing and quality control
Summary of mill survey results 80 survey 1 sag 2 70 survey 1 2 2 3 60 blast 340319 320314 320314 310316 sag 1 muck load vol 263 228 269 50 ball load vol 110 138 138 132 40 ball size mm 150 125 125 125 30 power kw 4550 4650 3970 4310 20 bearing pressure 3900 3740 3720 3927 10 kpa 0 mill speed rpm 1142 1142 1079 1150
The 427 m x 1294 m egl secondary ball mill is fitted with a 4125 kw motor and operates in overflow configuration ball mill discharge slurry gravitates to the feed of the sag mill discharge screen situated above the mill discharge hopper in 2002 the grinding circuit became sag mill limited by the competency of the mill feed
The ball mill this can be caused for example by required inspections performed on the sag mill shell bearings etc which leads to a relative short shutdown of the sag mill if the ball mill would be equipped with fixed speed motors then they will have to be washed out isolated and
This paper describes advances in the operation and control of new sag mill installations in australia pebble crusher a 1097m 36’ sag mill and a 73m 24’ ball mill in closed
Used sag mills ball mills for sale allis chalmers ball mills marcy we deal with all kinds of used ball mills and sag mills for sale 1 ball mill gm085 2ft x 3ft ball mill stainless steel reliance motor 12 hp size
With improved sag mill control stability the mill load can be optimized to increase crushing performance and produc tion capacity along with the potential for greater produc tion brainwave also allows you to operate your mill at maximum efficiency because a large amount of power is used just to keep the mill and its ball charge moving
Oyu tolgoi llc the company would like to invite potential experienced suppliers to submit their expression of interest eoi in relation to supply of sag and ball mill relining shutdown support an eoi is only a preliminary step to a formal tender process to understand and identify whether there are potential suppliers in the market that are interested in and capable of
Copyright © 2020 Apartio Machinery Company All rights reserved