Our SAG mill strategies automatically adjust feed rate, mill speed and water addition to reduce upsets, eliminate grind-outs, protect liners/lifters, and increase tonnage . We maintain desired operating conditions by constantly monitoring bearing pressure, mill power, recycle pebbles, mill density, charge toe and mill acoustics,

SAG mill. SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.

hierarchy to evaluate and validate calculations and input data used to produce the specific results being queried. The power of such a system resides in the full and true integration of all production and laboratory data. What is integrated are the data thus acquired via a single user interface, a single database, a single configuration tool, etc.

Sag (mm): --. SAG= R−√R2 −(D 2)2 SAG = R − R 2 − ( D 2) 2. R. Radius of Curvature.

8-3 Centrifugal force outward Fc mp& 2 Dm 2 (8.1) & is the angular velocity, mp is the mass of any particle (media or charge) in the mill and Dm is the diameter of the mill inside the liners. Gravitational force Fg mpg (8.2) The particle will remain …

mill work index 11.4 kWh/t and an average RQD of 44%. RQD values of 25% resulted in a SAG mill feed size (F80) between 55 and 60 mm and throughputs of 6200 t/h. RQD values of 55% resulted in SAG mill feed size (F80) of over 70 mm and a SAG mill throughput of 5200 t/h. The Batu Hijau SAG mill specific energy was a function of point load test and ...

Video 1: Mill Showing Surface Wear Modification Case scenario. Consider a large SAG mill with a diameter of 10.97 m, as shown in Figure 1a. The mill has a high-definition line design with alternating lines of high and low elevators (Figure 1b). The mill processes rocks from 200 mm to 300 mm, using 350 mm steel balls as the grinding medium.

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

SAG Mill Circuit Sampling. ... use of large memory high speed computers coupled with finite element methods provides the means of …

the tumbling mill stage(s) (µm) 8. Product P80 of the tumbling mill stage(s) (µm) •If there are multiple stages of grinding (e.g., SAG milling followed by ball milling), only the P80 of the product of the final milling stage is required. In addition to the above data, a representativesample of the primary crusher product is required for ...

Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on profitability. Mill operators have long used operating work indices to evaluate grinding circuit efficiency, with great utility.

Sag-tension Calculations A Tutorial Developed for the IEEE TP&C Line Design Subcommittee. Rio Darputra. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 33 Full PDFs related to this paper. Read Paper. Download Download PDF.

Control of -SemiAutogenous Grinding(SAG) mill weight is an example of an important process that exhibits many of these aspects. Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, M.S., van der Westhuizen, A.P., & Mainza, A.N. 2009).

Quarterly copper production totaled 24,527 metric tons, down from 38,370 tons over the same period. "Newcrest's production in the September quarter was in line with our expectations and reflects ...

2D and 3D simulations of particles in a SAG Mill red=fastest, blue=slowest moving particles [image: (135-6-4)] The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill.

AG/SAG mill and crusher circuit simulations through the use of JKSimMet. Independent of this it can be used in power-based calculations, which in conjunction with the Bond ball work index test, enable the prediction of the specific energy of comminution circuits where such circuits include combinations of any of the following equipment:

1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powder-like structures. 3.

Enter the width of a mill shell liner. Note this is not the width of a lifter! You may use the Mill Liner Effective Width calculation to determine this value. The mill critical speed will be calculated based on the diameter (above) less twice this shell liner width. Mill Actual RPM: Enter the measured mill rotation in revolutions per minute.

how to calculation critical speed of sag mill [randpic] SAGMILLING .:. Mill Critical Speed Determination Enter the width of a mill shell liner. Note this is not the width of a lifter! You may use the Mill Liner Effective Width calculation to determine this value. The mill critical speed

This video shows how to obtain enclose Volume for a SAG Mill using Geomagic Wrap in aroud 8 minutes. It shows Import of FARO Focus FLS file 1/1 (full point c...

The SAG mill pinion energy is determined from the SAGDesign™ testwork results as follows : W SDT = revs (16,000 + m s)) / (447.3 m s) where : W SDT = AG/SAG Specific Pinion Energy from a F 80 of 152.4 mm to a T 80 of 1.7 mm, kWh/ton ground revs = Cumulative number of SAG test mill revolutions to 80% passing 1.7mm m s = SAG mill feed sample ...

Authors' final version of paper published in Minerals Engineering 22(12):1032-1044, Oct 2009 INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV: INFERENTIAL MODEL VALIDATION T. A. APELT*§ and N. F. THORNHILL§ § Centre for Process Systems Engineering, Imperial College SW7 2BY. Email: thomasapelt@yahoo

：. （1）Auto Time Step,Fixed Time Step3e－4s,The percentage of Rayleigh time step（～20％）. （2）Total Time5S,Target Save Interval 0．01s,5,0．01。. （3）Selective Save,Full Data Save Every ...

Mill Power required at pinionshaft = (240 x 16.5 x 1.025) ÷ 0.746 = 5440 Hp Speed reducer efficiency: 98% 5440 Hp ÷ 0.98 = 5550 HP (required …

mill under steady state then cutting off all feed streams to the mill as it is being stopped. Sufficient time is required to obtain all the important measurements correctly during the crash stop. The mill filling should be measured at a minimum of 3 points along the mill. Excess of slurry could also be estimated. To get rid of pulp and rocks in ...

This video shows how to calculate Volume of a SAG Mill using GEOMAGIC DESIGN X in under 6 minutes from start to finish.Alignment: Local Based on Pick Point &...

SAG mill energy required according to this statement, is 2.5 times more than the Ab value to produce the same degree of ... (DBC) AG/SAG SE calculation is based on an AG/SAG circuit without a pebble crusher. Comparisons are made between the SMC and the author's method of AG/SAG SE evaluations using examples. Two

The SAG mill trommel screen provides a simple mechanism to classify large volumes of mill product. Trommel Screens are attached to the end of grinding mills and scrubbers to perform a variety of screening functions. The trommel screen comprises the rubber lined steel frame and replaceable screening surface.

Some design methods (Lane et al., 2013, Morrell, 2004, Siddall & Putland, 2007 predict the total comminution energy requirements of SAG mill-based circuits using work indices measured in ...

Depending on the mill size the SAG mills draws between 2 MW and 17 MW. The product from the SAG mill is further reduced in size using pebble crushers and ball mills. Hence, typical gold or copper ore requires between 2.0 and 7.5 kWh per ton of energy to reduce the particle size. Considering a typical mining operation processes 10,000 to 100,000 ...