ABSTRACT This paper discusses the process design and layout of the Constancia Project comminution circuit. The circuit consists of a 60 x 113 primary crusher, two 16 MW SAG mills and two 16 MW ball mills.

AG and SAG Mill Circuit Selection and Design by Si_50 ...


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

Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e., the impact of shell liners on the grinding action and of grates and ...

SAG Mill Operation at Cortez: Evolution of Liner Design ...

Proceedings of the 39th Annual Canadian Mineral Processors Conference – 2007 124 ABSTRACT The Cortez SAG mill liner design was recently modified to improve the mill operating energy efficiency. In addition to the expected benefits, the design change unexpectedly played a

SAG Mill Liner Design - Mineral Processing & Metallurgy

To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered.


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 ...


SAG mill design, GMD design and the associated component manufacturing. This paper also addresses, where applicable, the potential reliability differences between the initially proposed 40 ft SAG mill and the finally accepted 42 ft SAG mill. KEYWORDS SAG mill, 40 ft, 42 ft, gearless mill drive, GMD, SAG manufacture, reliability THE PROJECT

Optimization and Control of a Primary SAG Mill Using Real ...

1 Optimization and Control of a Primary SAG Mill Using Real-time Grind Measurement C.W Steyn*, K Keet**, W Breytenbach*** *Control Engineer, Anglo American Platinum, Control and Instrumentation Department, Johannesburg,

SAG Mill - Feed The Beast Wiki

The SAG Mill is a block added by the EnderIO mod. A machine similar to a Pulverizer or a Macerator. It is used to process resources to produce dust. It accepts energy in the form of Redstone Flux or Minecraft Joule, with an internal buffer of 100,000 RF and consumption of 20 RF per tick.

Mill (grinding) - Wikipedia

SAG is an acronym for Semi-Autogenous Grinding. SAG mills are autogenous mills but 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.

Robust control of a SAG mill - ScienceDirect

The SAG mill component of this dynamic model was used to design and test a robust controller whose aim was to maximise feed throughput by maintaining the SAG mill …

AG and SAG mill circuit selection and design by simulation

The use of modelling and simulation has become routine in the design and optimisation of AG and SAG mill circuits. One of the most widely used models for this purpose is the so-called " variable ...

SAG Milling in Australia -Revised Submission

Developments in SAG Mill Design and Operation Over the last few years, SAG mill manufacturing technology has advanced rapidly. The bounds of mill size have been pushed from two directions. Firstly, the advent of ring motors has removed the constraint applied by …

sag mill design pdf – Grinding Mill China

sag mill feed chute design - BINQ Mining. SAG mill for sale,SAG mills Design,Used SAG wet Mill. SAG Mill Line Design Service . Fresh ore is continually conveyed into the mill feed chute and is ...

Autogenous and Semi-Autogenous Mills

this test provide accurate information for the optimum mill sizing and circuit design for a commercial installation. Application AG/SAG mills are normally used to grind run-offmine ore or primary crusher product. Feed size to the mill is limited to that size which can be practically conveyed and introduced into the mill. The mill

Choosing a SAG Mill to Achieve Design Performance

SAG mill itself and not on the test work program. Stated another way, money invested in a large SAG mill is an investment that can produce handsome returns if extra production is needed or simply to give the mine the option to mill the hardest ores at design throughput rates.

chromoly steel for sag mill liners -

The Selection and Design of Mill Liners . ... or for thinner section liners. 3. High Carbon Chrome Moly Steel (325 to 380BHN): This steel is now considered the main material used for SAG mill liners. There are a number of variations with either different carbon or chrome contents. The variations tend to have a bearing on the size of the liner and

SAGMILLING.COM .:. Home is home to a collection of both free and subscription-based calculation tools to aid metallurgical process engineers perform comminution calculations. Grinding circuit design tools, including for SAG mill-ball mill circuits, and geometallurgy energy models are available to subscribers.

wardell sag mill design -

Jul 15, 2018· SAG Mill Testing - Test Procedures to Characterize Ore Grindability. samples, is a more typical approach to grinding mill design. This paper summarises the requirements and deliverables of various bench-scale test procedures,


An updated data set for sag mill power model calibration This paper expands the SAG mill survey database published by the Author at Procemin 2013. The new database includes 49 published SAG/AG mill surveys and includes mills from all over the world.

Autogenous and Semiautogenous mills -

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

SAG Mill Grinding Circuit Design

SAG Mill Design and Specification . The Kidston plant was designed to process 7500 tpd fresh ore of average hardness; but to optimise profit during the first two years of operation when softer oxide ore will be treated, the process equipment was sized to handle a throughput of up to 14 000 tpd.

The Selection and Design of Mill Liners - MillTraj

mills in the older plants that had many mills in parallel. In fact this is generally still the case in the multi-stream plants, where mill liner design and selection is only tackled on a cost consumables basis. However, the gains to be had through good liner design and selection are just as great as on the large SAG mills.

SAG Mill | Mill (Grinding) | Mining - Scribd

Pick the design power for the SAG mill. future expansion plans. The design engineer is ultimately responsible for confirming the mill manufacturers recommended power draw. Check that the SAG mill grinding chamber will draw design power at optimum conditions using the …

SAG Mill Testing - Test Procedures to Characterize Ore ...

samples historically constituted the traditional approach for AG or SAG design, but was gradually replaced by small-scale tests. Nowadays, conducting grindability tests requiring only a few kilos of material on several samples, is a more typical approach to grinding mill design. This paper summarises the requirements and

What Can Go Wrong in Comminution Circuit Design?

• SAG Mill Design Test (Starkey, 2006). There are reasonable correlations between all the tests' data that generally allow any or all of the data to be used to design a SAG mill based grinding circuit for 'typical' ores of a moderate competence range. Issues have arisen where the expected SAG mill specific energy is greater than 10 kWh/t.

Grinding Circuit Design for Adanac Moly -

design of a plant for Adanac Moly Corp. to include SAG and Ball milling. The hardness of each sample was measured in terms of SAG power index, SPI (for SAG grinding) and Bond Ball mill work index, BWi (for ball mill grinding). A further measure, the Minnovex crusher index, Ci was also measured for use in the CEET program to determine SAG

Sag Mill Trommels - Polydeck Screen Corporation

We have extensive experience in designing large trommels for both SAG mill and large ball mill applications. It is essential in the design of larger trommels that the structural designs are capable of withstanding the occasional "spill over" of steel balls that occur during the "re-charging" of the mill.