2 · Sag mill range APPLICATION ENVIRONMENT For SAG milling applications, the diameter of the balls, mill and throw action of the charge provide for a high impact environment - therefore a balance must be achieved between abrasion resistance and impact resistance in SAG balls to avoid excessive breakage.

#### SAG Mill Grinding Circuit Design

2016-6-6 · Pulp-lifter design can be a significant consideration for SAG mills, particularly for large mills. As mill sizes increases, the required volumetric …

#### SAG Mill | Autogenous and Semi-Autogenous Mills | …

Benefit from AG and SAG Mill in many drive arrangements, sizes and bearing designs. Your operation requires a Semi Autogenous Mill (SAG mill) or Autogenous Mill (AG Mill) that is flexible, durable, cost-efficient and tailored to your specific …

#### AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND …

2014-10-1 · 5 Low ball charge SAG mill, high mill speed. (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive ores. As typically operated in RSA. 6 SAG mill (configurations 3, and 5 ) with recycle crusher Competent ores, better suited to coarse grind sizes as circulating loads can be high 7 SAG mills treating partially or fully

#### Comparison of ore hardness measurements for grinding …

2009-8-19 · The use of Bond equations to calculate pinion energies in ranges where the mill feed size exceeds normal rod mill feed is a mistake and leads to lower than required SAG pinion energy. Fred Bond did not envision the use of these equations for …

#### SAG mill Archives

2 · The SAG mill has a mill diameter of 24 ft (7.3 m) and an effective grinding length of 18.5 ft and a structural charge mass of 315 t, Condor Gold said. The structural design ball charge is 11% with a structural design load volume of 35%. Specific gravity of the material is 2.55.

#### Modelling: Transfer size limits

2021-11-24 · Fine transfer sizes (E.g. 250 µm) might require the SAG mill to be in closed circuit with a hydrocyclone. The circuit diagram won''t show this primary hydrocyclone, but the simulation expects it to be there and the transfer size is the hydrocyclone overflow that …

#### Semi-autogenous grinding (SAG) mill liner design and ...

2016-6-6 · operation of SAG mills. SAG mills are currently the technology of choice in hard rock milling operations for reducing primary-crushed ore to ball mill feed. In recent years, the trend has been towards larger-sized SAG mills with diameters of 10.4 m (34 ft) and above, with the largest being 12.2 m (40 ft) in

#### Mill drives: the desire for increased power and the ...

2021-12-10 · SAG mill drives (as GMDs) by some operators and principal motor designers/manufacturers until the reasons for known problems in design or manufacturing were better understood and resolved. Accordingly, the latest 40 ft dia. SAG mill is rated at 29 MW and 78% C.S., with a 42 ft dia. mill built but not yet operational. The more recent option

#### SAG mills (semi-autogenous grinding mills)

SAG milling extends itself to many applications due to the range of mill sizes available. They 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 done by a ball mill. SAG mills are also an optimum solution for wet grinding since crushing and screening in these ...

#### Grinding Circuit

SAG mill product feeds two parallel ball mills of 6.6 m×11.1 m (internal diameter×length), each with a 9.7 MW twin pinion drive. The ball mills are operated at a ball charge volume of 30–32% and 78.5% critical speed. The SAG mill trommel undersize is combined with the ball mills'' discharge and pumped to two parallel packs (clusters) of ...

#### Model:Morrell Mi SMC SAG

2021-3-23 · Morrell Mi (SMC) SAG & ball mill Model. This is a SAG or AG mill plus ball mill model that estimates the specific energy consumption (E SAG) using the equations of Morrell (2004). Testwork Required. The SMC™ test, stored in the "DWT" testwork table (SMC is a Drop Weight Test). Bond ball mill work index.

#### CASE STUDIES ON THE EFFECT OF SAMPLE …

required in the primary (SAG) mill in the first project, and more energy in the secondary (ball) mill for the second. Comparison of Test Results For Similar Sample Dimensions Grinding tests that occur at similar sizes should report similar findings, and should lead to …

#### (PDF) Influence of feed size on AG / SAG mill performance

2021-12-3 · When the feed size of a SAG mill becomes coarser, i.e. α r increases, the energy required to break the ore increases, i.e. φ r and φ f increases …

#### ERSEL Ağır Makine San. ve Tic. A.Ş.

2019-9-10 · ERSEL Ağır Makine San. ve Tic. A.Ş. Toggle navigation. * Semi-autogenous (SAG) grinding is a grinding process carried out with small amount of ball charge (4-15%) unlike ball mills and with the help of bigger parts crumbling the smaller parts of ore. * To achieve this type of grinding, SAG mills with large diameter and short length have been ...

#### Comparison of SAG mill feed size & throughputs | …

January 2007, two complete grinding circuit surveys were performed followed by a SAG mill crash stop and grind-out. After stopping the mill, a SAG mill …

#### (PDF) Influence of feed size on AG / SAG mill performance

2021-12-3 · When the feed size of a SAG mill becomes coarser, i.e. α r increases, the energy required to break the ore increases, i.e. φ r and φ f increases (Morrell et al., 1996; Morrell and Valery, 2001 ...

#### (PDF) SIZE REDUCTION BY GRINDING METHODS

2022-1-1 · The largest SAG mill is 42'' in diameter, powered by a 28 MW (38,000 HP ) motor. A SAG mill with a 44'' diameter and a power of 3 5 MW (47,000 HP) has been designed.

#### What''s the Difference Between SAG Mill and Ball Mill ...

2019-11-26 · The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill''s ...

#### SAG Mill Grinding Media – Kemcore

SAG Mill Grinding MediaKemcore SAG steel forged balls are manufactured grinding balls in nominal sizes from 90 mm to 140mm. With average wear rates of 0.6kg/ton, they''re among the best in the industry.

#### Grinding Mill Computer Model

2021-6-24 · A graph shows the mill design relative to its minimum design. A data base allows standard mill sizes to be picked for each manufacturer and the motor size that the manufacturer would put on each mill size. MILLCALCv2a 4 19/02/2004

#### Horizontal mills for your mining operations

In the ever-increasing quest for reduced mineral processing costs and increased throughput tonnages, there has been a worldwide move towards larger and larger mill sizes. As such, FL has supplied some of the world''s largest horisontal grinding mills with ball mills up to 28ft in diameter (22MW) and SAG mills up to 40ft in diameter (28 MW).

#### TECHNICAL NOTES 8 GRINDING R. P. King

2009-7-30 · LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...

#### Grinding Mills

2014-6-15 · These mills are scheduled of start up on 2012. Our market share in China exceeds 80% with the largest mills supplied to date being a Ø7.9m x 13.6m 2x8.5MW Ball Mill and a Ø11m x 5.4m 2x8.5MW SAG Mill, being the largest in China.

#### SAG

Autogenous and Semi-Autogenous Mills | FL

#### Autogenous grinding mills (AG mills)

Gearless mill drive (GMD) technology has further expanded the use of large AG milling allowing Outotec to produce the world''s largest SAG mill of 42'' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier of gearless AG mills operating globally.

#### AG/SAG Mill Liners

AG/SAG Mill Liners. We have supplied rubber pulp lifters for SAG mills up to 40 ft in diameter. We are pioneers in the design of both radial and curved pulp lifters, also design and manufacture Rubber / PolyStl™ grates and discharge systems.

#### Grinding Media

OVERVIEW. ME Elecmetal has the capacity to manufacture premium quality forged grinding balls of all sizes ranging from 22 mm to 160 mm (7/8" to 6 ¼" approx.) and in three product lines: ME Super SAG, for SAG mills; ME Ultra …

#### Semi Autogenous Grinding Mill

In a SAG mill the dimensions of the mill were 9.75. m × 3.5 m and the specific gravities of the mineral and that of the balls charged were 4.1 and 7.9 respectively.. The mill was rotated at 75% of its critical speed when 8 % of the mill volume was charged with grinding balls.Estimate:1. The mill power drawn, 2. The maximum mill filling possible.

#### INFERENTIAL MEASUREMENT OF SAG MILL …

2021-8-4 · 3. SAG mill fractional total filling, J t, fractional ball filling, J b, and fractional rock charge filling, Jr, ( J r = J t − J b); 4. SAG mill total feed; 5. Oversize crusher product and primary cyclone underflow; and, 6. SAG mill fresh feed, including the feed sizes ( F 80. . . F 20). Step 1: Oversize Crusher Feed, Primary Cyclone Feed and ...