Aug 25, 2014· 1. The right determine of SAG feed size. This depends on the mill diameter and the ball size. Feed size necessary to take 80% of the maximum piece of ore that will crushed by the balls. For the big SAG more than 8 meters optimal feed size will be 50mm. Ball size 120 ... 125mm. Do not a pebble crushing , the need secondary crushing. 2.

Get Price# effect of course sag mill feed on the ball mill

Jun 19, 2015· The effect of Ball Mill RPM speed going from subcritical to supercritical helps understand the Ball Mill Working Principles of ballonball VS ballonshell grinding. The Motion of the Ball Charge

Get PriceEFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL PERFORMANCE Niyoshaka Nistlaba Stanley Lameck A dissertation submitted to the Faculty of …

Get PriceEFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL PERFORMANCE Niyoshaka Nistlaba Stanley Lameck A dissertation submitted to the Faculty of Engineering and The Built Environment,

Get PriceOptimization of mill performance by using online ball and pulp measurements Soon after a stop, a mill is a dangerous place to enter for the personnel tasked with taking measurements or samples. Crash stops are difficult to handle. The mill and all feed streams should be stopped simultaneously but, often, they are stopped around about the same time.

Get PriceFor this purpose, the strength properties of the SAG mill feed and product were specified by different techniques, including the point load index, impact breakage parameters (A × b), abrasion index (t a), and Bond ball mill work index (W i).

Get PriceOct 12, 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.

Get PriceJan 01, 2001· An increase of over 10% in mill throughput was achieved by removing the ball scats from a single stage SAG mill. These scats are non spherical ball fragments resulting from uneven wear of …

Get PriceAt the Kemess Mine, the effect of a trunnion magnet system on the ball mill was significant. The total mill feed remained essentially unchanged averaging approximately 1300 TPH. However, the total mill power consumption dropped 8% from an average of 7600 kW to 7000 kW.

Get Pricehas experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as startup, operation, and optimization of your mill.

Get PriceA comparison of SAG mill power models. The allowance for the cone section of the mill (assuming 15° cone angle) according to Austin''s published method works out to , an additional 507 kW, for a total of 3,472 kW power draw at the mill shell. The measured power is 3,190 kW at mill shell, so the model predicts high by 298 kW, or 9%.

Get Pricewhere d is the maximum size of feed (mm); σ is compression strength (MPa); E is modulus of elasticity (MPa); ρb is density of material of balls (kg/m 3); D is inner diameter of the mill body (m).. Generally, a maximum allowed ball size is situated in the range from D /18 to D/24.. The degree of filling the mill with balls also influences productivity of the mill and milling efficiency.

Get PriceFigure The effect of mill speed on the power drawn by a rotating mill. The liner profile and the stickiness of the pulp in the mill can have a significant effect on the actual critical velocity. Mills usually operate in the range 65 82% of critical but values as high as 90% are sometimes used. A crucial parameter that defines the ...

Get PriceThe ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index. For grinding circuits where the feed to a ball mill is sent directly to the classifier and the cyclone underflow feeds the ball mill (see Figure ), a question arises as to whether this practice will alter the ball mill work index (BW i) of the material ...

Get PriceThe wear of lifter in ball mill directly affects the grinding efficiency and economic cost. However, how to evaluate the variation of wear process and predict the wear distribution of lifter is poo...

Get PriceThe discharge from the SAG mill is screened by a trommel screen mounted at the discharge end of the mill. The oversize material is recycled to the SAG mill feed via conveyors and the undersize material is combined in the cyclone feed sump with the ball mill discharge and feed to the ball mill …

Get PriceEffect of ball mixture 37 Ball size distribution in tumbling mills 37 Milling performance of a ball size distribution 40 Summary 41 Chapter 3 Experimental equipment and programme 43 Laboratory grinding mill configuration 43 Preparation of monosize grinding media 44 Feed material preparation 46

Get Priceone SAG mill ( dia.(m)* length(m)) following two parallel ball mills (5dia.(m)*7lenght(m)). The aim of this research work was to investigate on the ball filling estimation of Miduk semiautogenous (SAG) Mill via an utilized method. Miduk SAG Mill circuit is shown in Figure 1. Figure 1: Diagram of Miduk Copper Complex SAG Mill Methods

Get PriceNowadays, experimental semiautogenous (SAG) mill and dropweight test are used for evaluation of grinding circuit regarding changes in feed particle size distribution, size of the ball, speed of mill, prediction of energy required, and product size distribution for complete grinding in AG and SAG mills. In this study, the effect of initial ...

Get PriceNov 04, 2010· This is followed by an SABC circuit comprising a ×, 13MW semiautogenous grinding (SAG) mill in closed circuit with 2,60kW pebble crushers. SAG milling is followed by a ×, 13MW ball mill in closed circuit with a cluster of 660mm cyclones.

Get PriceJan 24, 2019· SAG AND BALL MILL EFFECTS FROM ORE SORTING SYSTEM IMPLEMENTATION. , B. HILSHER2, S. REEVES3 and J. HEDDERSON4 ... new measurements of hardness need to be performed on the new concentrated mill feed. This paper proposes a methodology to examine this effect quantitatively at an early stage of project development using the SAGDesign test.

Get Pricespecs of sag mill balls. Mill Bolting. The mill manufacturer specifies a load which is designed to be the optimum load applied to the bolts to hold the mill together for its entire life which can be in excess of 20 years some mill manufacturers specify an elongation unfortunately they usually specify a torque figure which should in a best case produce the correct elongation but

Get PriceBall mills for superfine calcium carbonate. Ball mill classifier systems have been improved over time and are now capable of achieving much finer products. In the past, a particle size with a D97 of 10 microns was only possible. Now particle sizes down to a D97 of less than microns can be achieved, with a D50 in the range of microns.

Get PriceJan 01, 1998· The most recent version of the sag mill model was used and incorporates the effect of ball load, feed size and speed (Morrell and Morrison, 1996) as well as the effects of …

Get PriceWhat is the effect of low ball % full on grinding efficiency?One of our clients is thinking of the future and has bought a ball mill that will be the right size someday, but is very large know what happens to mill power from adjustments to % critical speed and % balls charge. What I don''t know

Get PriceJan 24, 2019· SAG AND BALL MILL EFFECTS FROM ORE SORTING SYSTEM IMPLEMENTATION. , B. HILSHER2, S. REEVES3 and J. HEDDERSON4 ... new measurements of hardness need to be performed on the new concentrated mill feed. This paper proposes a methodology to examine this effect quantitatively at an early stage of project …

Get PriceThe SAG mill feed is controlled by the mill weight, measured by 4 load cells on the mill bearing system. Therefore if the ore does not grind quickly enough in the SAG mills, the mill weight increases and the control system reduces feed to the mill to maintain the desired mill weight.

Get Pricefor short. From the literature it is apparent that in circuit design some approaches to the sizing of AG/SAG mills as well as the ball mills that they feed use this parameter. This paper reviews whether the use of the T80 is appropriate in this context. In the course of the review examples of AG/SAG discharge size

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Get PriceΦ x SAG Mill and Φ x Ball Mill Mill Liners Redesign . Our customer is a gold concentrator. The design capacity of the gold concentrator is 2 000 t / D, and the general hardness coefficient of the ore is 810.

Get PriceOptimization of mill performance by using online ball and pulp measurements Soon after a stop, a mill is a dangerous place to enter for the personnel tasked with taking measurements or samples. Crash stops are difficult to handle. The mill and all feed streams should be stopped simultaneously but, often, they are stopped around about the same time.

Get PriceMinetomill optimisation effect of feed size on mill throughput. has on concentrator throughput. Blasting provides mills and onto the secondary ball mill circuits alleviating a the main calculations used to size the plant. Get Price; 1 MODELING THE SPECIFIC GRINDING ENERGY AND BALLMILL . Ballmill scale up (Bond s Law).

Get Priceness of the models. For a given mill to have a combination of feed size, ball load, mill speed and % solids will represent the total load. Ball Mill SAG Mill Scw Jb Pc % 6" +1" N/Nc Fresh Feed Water Water Pebble Crusher Screen Cyclones Sump Pump Fig. 1. SABC A/B milling circuit.

Get PriceEffect Of Course Sag Mill Feed On The Ball Mill. course grade sag mill mersl. Ø Effect of SAG Mill Feed Size, Hammer mill, Sag Rod and Slaker Mills, Ball, effect of balls charge on sag mill performance ... More. Academics

Get PriceEvery second counts, and adjusting these parameters within seconds can have a significant effect on the wear of your SAG mill, which will effect on your bottom line. SAGwise TM reduces your mill’s ballonliner impacts with up to 45 per cent, which prolongs liner life and minimises media degradation.

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