Peripheral Discharge Ball Mills. ... Hard materials require heavier balls or greater height of drop than soft ones and steel balls in small diameter cylinders will do the same work as flint pebbles in large …

The ratio of the trunnion thickness to trunnion diameter in a mill of 2,134 m diameter is almost twice that of a mill of 5,8 m diameter, i.e. a ratio (T/D) of 0,116 to 0,069 for the large mill. However the design stress levels at the trunnion/head transition in the case of the large mill are almost 250% of those in the small mill.

Here I try to explain how ground slurry is discharged from a grate ball mill (or SAG). How it works is, the slurry flows across the grate as it would a ... A grate discharge mill that is "ground-out" would show …

Polycorp specializes in the design and manufacture of Rubber Pulp Discharge Systems. These systems are suitable for AG / SAG and primary ball mills. The Rubber Dischargers are manufactured with rubber hand …

Dimensionality in mill design Ball mill shape factors in the period prior to 1927 (Taggart, 1927) averaged l.l/1 for 29 center discharge mills and 1.0/l 30 peripheral discharge mills. With the resumption of new plant construction after the 1930s depression, Morenci concentra­ tor continued the l/1 ratio with its 3.1 x m (I

Grinding mills can by classified by which types of discharge the ball mill has installed to let out the ground slurry. Best is rapid change of mill content results in …

Palla Vibratory Ball Mill, 8" diameter X 50" long (200 mm X 1249 mm). Manufactured by Humbolt - Wedag, model 20U, serial number 20181; was demo unit for trade shows. ... Marcy 8' diameter x 6' long ball mill with trunnion feed and discharge. Rubber liners and lifters. Last used in a wet grind application. ... - 10 x 8 ft EGL ball mills ...

Converting a ball mill from overflow to grate discharge involves installing a grate inside the mill at the discharge end. The grate holds the balls inside the mill but allows the slurry to pass through, and it …

Influence of open area on discharge rate through the grate-only and grate-pulp lifters with medium size radial pulp lifter (MRPL): (a) grate-only discharge and (b) grate-pulp lifter discharge. However, with the pulp lifters fitted, the discharge rate was found to marginally decrease up to 7.05% open area and then remained constant with …

Pulp lifters, also known, as pan lifters are an integral part of the majority of autogenous (AG), semi-autogenous (SAG) and grate discharge ball mills. The performance of the pulp lifters in conjunction with grate design determines the ultimate flow capacity of these mills. Although the function of the pulp lifters is simply to transport the slurry passed …

The plant is set up in a mill – float – mill – float (MF2) circuit with primary and secondary milling stages prior to primary and secondary rougher flotation respectively. The tests for this project were carried out on the …

Buy Dominion 11' X 14' Egl (3.4m X 4.4m) Ball Mill, No Motor (previously Installed With 800 Hp) from A.M. King Industries. Request a quote online today. Contact; Request Quote; Save your Quotes Register Now. Register Login. Browse Mining Equipment ... Diameter: 11 Feet. Brief Description .

Discharge grates play an important role in determining the performance of autogenous, semi-autogenous and grate discharge ball mills. The flow capacity (grinding capacity) of these mills is strongly influenced by the discharge grate design––open area and position of apertures, as well as the performance of the pulp lifters.

FIGURE 9 FIGURE 10 illustrates the use of the Rajamani program for a 40 ft (12.2 m) diameter mill operating with a 13% ball charge. The mill is turning at 8.99 rpm (approximately 74% T.C.S.) and has a 20 degree angle on the lifter bar. The mill liner design pattern has a high/low design and has 78 rows per circle. FIGURE 10 FIGURE 11 ...

Estimates of the increases in power draw possible with grate discharge ball mills range from 10% to 20%, according to mill size and other operating parameters. The figures from pilot tests and some operating sites are even higher, up to 25% more power draw. ... Finally, a correctly designed pulp lifter with sufficient discharge capacity is very ...

(2) 10′ x 18′ Outotec Ball Mills. Polishing Mills; Diameter: 3.2 m (10.5 ft.) Length (EGL): 5.6 m (18.4 ft.) Design: Trunnion Supported Mills; Rubber Liners; Overflow Discharge; 725 KW Variable Speed Single Pinion SCIM Drives; 1000 HP, 4160 Volt Motors (2) 9′ x 13′ Outotec Ball Mills. Polishing Mills; Diameter: 2.7 m (8.9 ft.) Length ...

The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired …

Ball Mill Design. A survey of Australian processing plants revealed a maximum ball mill diameter of 5.24 meters and length of 8.84 meters (Morrell, 1996). Autogenous mills range up to 12 meters in diameter. The length-to-diameter ratios in the previous table are for normal applications. For primary grinding, the ratio could vary between 1:1and ...

The particle size distribution of ball mill grinding products is an important production index of the grinding operation, and due to its multivariate strong coupling and nonlinearity in the operation process, it leads to difficulties in achieving optimal control of the discharge particle size distribution. To this end, a reinforcement learning-based optimal control …

The ball load and pulp load have a significant influence on the ball mill product size and production capacity. To improve the circuit performance at industrial scale these variables must be ...

Integrated with a classification tower and feed/discharge conveyor system, the mill can be set-up to facilitate open circuit, single stage closed circuit, AG/SAG and ball mill circuit (SAB), and AG/SAG and ball mill circuit …

We sell custom ball, pebble and rod mills built to your specifications for mining and other industrial applications. Learn about our mill features and services. ... Mill Size Dia X Length ft (m) Dimensions Inches (mm) * "A" ** ... **Add 10 inches (254 mm) to dimension "A" for grate discharge Mill sizes up to 7.5 ft (2.28m) diameter ...

Mill type (models) Diameter EGL length Installed power SAG (31) 3,80 m - 9,00 m 1,90 m EGL - 4,50 m EGL 400 kW - 7.800 kW Ball (41) 0,60 m - 6,00 m 0,90 m EGL - 12,00 m EGL 2,2 kW - 7.800 kW Rod (8) 2,40 m - 4,60 m 3,60 m EGL - 6,10 m EGL 200 kW - 1.600 kW Select scope Rotating mill structure Start-up set of lining Induction drivetrain Select ...

8′ x 37′ Allis Chalmers 2 Compartment Ball Mill, Chrome Moly Liners, 900 HP Synchronous Motor. Equip yourself with the gold standard. Manufacture & Design. Diameter: 8′ dia. Length: 37′ long; Compeb Ball Mill; 2 Compartments; Spout feed; Grate discharge; 1-piece Shell with (3) man holes . Construction Materials. Welded steel shell

The original ball mill table for the A factor, which is related to the mill diameter, started at 8 ft inside the liners and went up to 20 ft., probably because that was the largest diameter of ball mill used at that time in the 1970's when the information was published by (Rexnord, 1976).

Denver 4' x 8' Ball Mill Make: Denver Size: 4' x 8' Feed Type: Center Feed Discharge Type: Trunnion Overflow Discharge Liner Materia ID: 1126234 Quote + ... 12 Ft. Diameter X 15 Foot EGL. 2 - 12 Ft. Diameter X 14 Foot EGL. Herringbone Bull And Pinion Gear. Complete With O ID: 228434 Quote +

38′ X 22′ EGL GRATE DISCHARGE SAG MILL, 19,400 KW. Quantity: 1. Grate discharge 19,400 KW wrap-around drive ... Description. Manufacture and Design 38′ (11.58 m) diameter 25'5″ (7.76 m) length, flange to flange Grate discharge. Motor and Drive 19,400 KW Siemens wrap-around drive motor ... 22″ X 36″ CAST IRON BATCH …

Although used for many years in the gold-mining industry, the conventional pan lifter at the discharge end of a pebble mill has hindered attempts at optimization of speed of rotation and pulp flow. A theoretical approach to flow patterns in pan lifters has pointed to limitations in the capacity of these lifters, with capacity decreasing as speed of rotation is …

The peripheral-discharge mill differs from a trunnion discharge mill, in the character of its product in that a small amount of moisture will give a fine product and a large amount a coarse product.

Pulp lifters, also known, as pan lifters are an integral part of the majority of autogenous (AG), semi-autogenous (SAG) and grate discharge ball mills. The performance of the …