Since the early 1900's Autogenous Grind (AG) and SemiAutogenous Grind (SAG) mills have been an integral part of the grinding circuit in mineral processing plants. One of the major components of these mills is the discharge assembly, which typically includes a grate and pulp lifter. A mathematical model of grate flow has been developed from data obtained from a pilot scale mill.

The installed primary mill is an Outotec x effective grinding length (EGL) grate discharge SAG mill with installed power. The mill is also installed with Turbo Pulp Lifters (TPL) in lieu of standard radial pulp lifters. Once material is discharged from the primary mill the slurry is pumped to a cluster of four CVX500 cyclones which are designed to achieve a P80 of 180µm. The ...

SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (13563)] AG/SAG Mill. AG/SAG mills are normally used to grind runoffmine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill

estimated utilising the SAG mill grate size and discharge screen aperture sizes and the RosinRammler size distribution function, which has been selected for its convenience and since it "has been found to fit many size distributions very well" (NapierMunn et al.,1996). SAG Mill Discharge, SMDC/smdc The SAG mill discharge properties (SMDC) and size distribution (smdc), including the ...

Grate discharge Diameter 38′ Length 25'5″ flangetoflange EGL 22′ Components / Inclusions Feed chutes Discharge grates Steel pulp lifters SAG mill trommel Mill braking system Hydraulic jacking system Portable hydraulic power unit. Motor and Drive 26,000 HP ( MW) Siemens wraparound drive motor 60 Hz synchronous Gearless, wrap around Differential protection. Related products. ID ...

discharge from sag milling. How a Grate Discharge Ball Mill Works. 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 screen panel. On the other side of the grate/screens are veins like a pump impeller. As the mill turns/rotates the slurry is "pumped" out and discharged. Get Price [] OUTOTEC ...

AG mill. SAG mills. All grate discharge mills (ROM, primary mills, etc.) Grates are manufactured in CrMo (FMU226 type) for AG and grate discharge mills and in HighChrome for AG mills. Lifters design adapted to avoid overthrowing of balls. Design to best fit to the existing pulp lifters. Available languages. All English Mandarin.

 · Discharge From Sag Milling; Overflow VS Grate Discharge Ball or Mill Why Retrofit. Metallurgical ContentTypes of Ball Mills Ball Mill GrindingExample of Plant Capacity GainsBall Mill SpecifiionsCompare Type of Mill DischargeGrate Discharge Ball Mill CapacitiesGrate Discharge Ball Mill Arrangement Dimensions Allow me to compare: Ball mills can be of the overflow or of the grate discharge .

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

AG/SAG Mill Liners; Discharge Grates; Discharge Grates . Polycorp specializes in the design and manufacture of High Pressure Moulded Wear Resistant Rubber PolyStl™ Grates. These grates are manufactured with moulded rubber on a steel frame and chord reinforcement to provide strength and flexibility to resist pressure and localized impact of the grinding charge. The rubber grates have ...

Grate Discharge Sag Mill. The grinding circuit for the Copper Mountain project consists of one FL SAG mill and two FL ball mills Figure 1 Overview grinding circuit The Copper Mountain SAG mill is 10363 mm 34 feet in diameter and 6096 mm 20 feet long It is a grate discharge mill with an inside diameter of 10363 mm 34 feet and a grinding length of 5334. Live Chat; Grate Discharge For Ball Mill ...

 ·  · Grinding mills, including SAG (semiautogenous grinding) mills and ball mills, consume approximately 6070% of the total energy cost of the entire mining operation. The mills are installed with large motors, up to 20+MW, which impart the required energy to successfully process many tonnes per hour and grind the rock to a powder size suitable for recovering the valuable mineral .

Optimiing Your Sag Mill Operation International. The commercially viable and industry accepted alternate is a grate discharge trunnion supported mill or a grate discharge shell supported mill using pulp lifters. The only way to eliminate the problem of flowback and carryover of slurry and pebbles is by optimiing the design of the discharge . Read More. Dry Ball Mill Product ...

SAG mill or crush return to ball mill –Increase in tph by ~ 1015 % –Coarser product . 2017 2. Comminution Insights Javier Kirigin Slide: 6 Discharge Systems • Overflow Discharge –Pulp can only exit via trunnion –Material level is controlled by trunnion diameter –PSD of product from overflow mills is less steep than for grate discharge more fines and more coarse particles ...

SAG and AG mills typically have grate discharge arrangements which can be either with or without trommel screens. SAG and AG mills with openended discharge arrangements are usually more efficient than grate discharge arrangements. However, as an alternative to an open ended discharge arrangement Outotec offers the patented Turbo Pulp Lifter® (TPL) for suitable appliions. Turbo .

GRINDING MILL, BALL MILL, SAG MILL GRATES Designed for optimum fit. Our head liners, partition, and discharge grates are designed for efficient mill performance with reduced maintenance needs. Cast in martensitic chromemoly steels with a 350 to 450 BHN hardness, Unicast grates are cast for high strength and optimum fit. DIAPHRAGM SCREENS Waterjet cut from AR400 plate for longest wear .

(AG), semiautogenous (SAG) 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. As mill sizes have progressively increased and closedcircuiting has become more popular the importance of grate and pulp lifter design has ...

the impact of shell liners on the grinding action and of grates and pulp lifters on pulp discharge. In recent years, the trend in large SAG mills has been to use widespaced shell lifters with large lifter face angles, primarily to reduce packing and ball/liner damage, and to use larger, hence fewer, mill liner parts to reduce downtime at liner changeouts. Key words: Comminution, Grinding ...

Grate discharge Dry Grate discharge Wet Overflow discharge Wet Figure Effect of mill filling on power draft for ball mills. The data is taken from Rexnord Process Machinery Reference Manual, Rexnord Process Machinery Division, Milwaukee, 1976 The effect of varying mill speed on the power drawn by the mill is shown graphically in Figure The speed of rotation of the mill influences the ...

SAG MILL DISCHARGE SCREENSTROMMEL vs. VIBRATING Tony Moon, RTZ What I'd like to talk about is probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use vibrating screens or trommel screens? What many of you probably don't realize is that at Kennecott's Copperton concentrator, which we started up ...

38′ X 22′ EGL GRATE DISCHARGE SAG MILL, 19,400 KW. Quantity: 1 Grate discharge 19,400 KW wraparound drive

 · Based on experience, millliner designs have moved toward more openshell lifter spacing, increased pulp lifter volumetric capacity, and a grate design to facilitate maximizing both pebblecrushing circuit utilization and SAG mill capacity. As a guideline, mill throughput is maximized with shell lifters between ratios of :1 and :1. This ratio range is stated without reference to face ...