### (PDF) Design of the biggest mill in the world

the init ial design and pil ot plant operation is the SAG mill feed size distribution which is 40 fine r than design and slightly finer than wa s used during the pilot plant campaign.

Get Price### Evolution of SAG Mill Process Control at the Xstrata

In addition to the new process equipment the SAG mill was commissioned with all controls implemented on the new PLC software platform. This removed the control strategy limitations previously described. Additional mill control loops and measurements now included Mill feed tonnage (automatic PI controloperator or remote set-point from mill

Get Price### Evaluating the effect of feed particles size and their

Nowadays experimental semi-autogenous (SAG) mill and drop-weight test are used for evaluation of grinding circuit regarding changes in feed particle size distribution size of the ball speed of mill prediction of energy required and product size distribution for complete grinding in AG and SAG mills.

Get Price### Feed Size VS Ball SizeGrinding Classification

xG is the mill feed d80 not the circuit feed. For SAG mill the xG value has to be determined by scalping of the full size distribution. The particles larger than the minimum pebble size (given by the pebble extraction grate opening) has to be excluded from the distribution to calculate the top ball size

Get Price### A Method of C alculating Autogenous/ Semi-Autogenous

SAG mills mimic the same shortcoming. It follows that in order to obtain the speciﬁ c energy (SE) to achieve a certain transfer size based on the 80 per cent passing value an inefﬁ ciency factor must be applied to the SE of single stage ball mills rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method.

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

The feed size distribution together with the ore characteristics (hardness lithology alterations etc.) are the most important factors affecting the SAG mills performance.

Get Price### Optimization and Performance of Grinding Circuits The

targets by lowering the throughput. Further the SAG mill circuit was characterized by fluctuating feed size of between x. F 80 =102 to 185 mm. A need for control of the feed size as well as blending ratios was recommended for an efficient operation in terms of throughput and final product size. This could be achieved through closer monitoring of

Get Price### Evolution of SAG Mill Process Control at the Xstrata

In addition to the new process equipment the SAG mill was commissioned with all controls implemented on the new PLC software platform. This removed the control strategy limitations previously described. Additional mill control loops and measurements now included Mill feed tonnage (automatic PI controloperator or remote set-point from mill

Get Price### SAG MillOfficial Feed The Beast Wiki

The SAG Mill is a machine added by Ender IO uses Micro Infinity (µI) to grind (or mill) items into their crushed variants like Ores into Dusts.The SAG Mill has four output slots recipes can have 1-4 different outputs with different chances of obtaining those outputs. Uniquely the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency (resulting in

Get Price### Autogenous and Semi-Autogenous MillsScienceDirect

The feed to high aspect AG/SAG mills are usually preferred from gyratory crushers while the feed to low aspect mills are preferred from jaw crushers. Depending on the set the maximum size of the particles discharged from gyratory crushers is about 300 mm and from jaw crushers is about 180–100 mm thus the optimum feed size may be taken to

Get Price### INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV

The oversize crusher feed size distribution oscf and the primary cyclone feed size distribution pcfd are estimated utilising the SAG mill grate size and discharge screen aperture sizes and the Rosin-Rammler size distribution function which has been selected for its convenience and since it

Get Price### Exercise 4 in Demo Change in SAG mill ball sizeYouTube

Click to view2 14May 08 2015 · Before making a change in the SAG mill ball size it is important to test it first in simulation. Exercise 4 in Demo Change in SAG mill ball size Minerality. Coarser Feed to a SAG Mill

Get Price### AMIT 135 Lesson 5 CrushingMining Mill Operator Training

The purpose of the primary crusher is to reduce the ROM ore to a size amenable for feeding the secondary crusher or the SAG mill grinding circuit. The ratio of reduction through a primary crusher can be up to about 8 1. Feed ROM up to 1.5 m Product -300mm (for transport) to -200mm (for SAG mill) Feed Rate 160 to 13 000 tph

Get Price### Development of a Multi-Component Model Structure for

The breakage and transport in AG/SAG mills was found to depend on the physical properties and proportion of the different components in the mill feed. Consequently the overall performance of an AG/SAG mill (throughput product size and power draw) is dependent on the feed composition and it could be predicted using a multi-component model.

Get Price### Bond Work Indexan overview ScienceDirect Topics

Ball mill design requires a Bond work index BWi for ball mills at the correct passing size SAG mill design requires an appropriate SAG test for example SPI (Chapter 5). Flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for each mineral ( Chapter 12 ).

Get Price### Crushing SAG Mill Critical Size Material

Secondary mill feedContinuous regulation capability gate to allow controlled distribution of feed between the two ball mills. Finally if the amount of critical size material removed from the mill is less than the crusher and secondary mills capacities those mills can also be fed with a small fraction of the SAG mill trommel undersize in

Get Price### Modelling SAG milling power and specific energy

the SAG mill critical speed Pc = SAG mill power consumption (kW) 600 100 = of the fresh feed in the size range 152 25 mm. M. Silva A. Casali/Minerals Engineering 70 (2015) 156–161 157 In fact the later can be modelled as a function of the others.

Get Price### Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill To Achieve Design Performance John Starkey1 Principal Consulting Engineer Sami Hindstrom2 Manager Grinding Travis Orser2 Project Manager Grinding 1 Starkey Associates Grinding Design and Process Engineering 336268 Lakeshore Rd. E. Oakville Ontario L6J 7S4

Get Price### SAG and AG MillAmstar Industry

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. Amstar SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28 000 kW.

Get Price### Modelling SAG milling power and specific energy

In Fig. 3 Fig. 4 the data is presented in order to show the effect of the fresh feed size particularly the −6″ 1″ (−152 25 mm) on the SAG mill power consumption (Pc) in kW and on the SAG mill specific energy consumption (Ecs) in kW h/t obtained by dividing the power consumed (kW) by the fresh feed

Get Price### SAG MillOfficial Feed The Beast Wiki

The SAG Mill is a machine added by Ender IO uses Micro Infinity (µI) to grind (or mill) items into their crushed variants like Ores into Dusts.The SAG Mill has four output slots recipes can have 1-4 different outputs with different chances of obtaining those outputs. Uniquely the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency (resulting in

Get Price### INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV

The oversize crusher feed size distribution oscf and the primary cyclone feed size distribution pcfd are estimated utilising the SAG mill grate size and discharge screen aperture sizes and the Rosin-Rammler size distribution function which has been selected for its convenience and since it

Get Price