SGI, CEET 1 & 2. The SAG Grindability Index (SGI) test, or alternatively the trademarked SAG Power Index (SPI), is a SAG-specific test involving a small batch SAG mill that is charged with a two kilogram ore sample and ground until the product has achieved an 80% passing size of 1.7 mm. The test result is reported as time required to achieve the target product size (in minutes).
SAG-mill Power Index (SPI) Test. The SPI test is carried out in a standardised mill under set conditions, with the output being the time to reach a given size, which can be converted to a SAG mill specific energy input (in kWh/t). The SPI index provides a profile of the hardness of the ore type and can be used for geometallurgical models.
Power calculation formula of sag mill. The S Power Index SPI test Starkey Dobby, 1996 uses a benchscale S mill test to determine the specific energy of an industrial S mill. The test is operated in closed circuit and the time required to grind the material to a P 80 of mm is used to predict S Get Price.
the mill power and the efﬁciency of the mill operation (Van Nierop and Moys, 2001). If a SAG mill has been designed with a conventional power or speciﬁc energy model which do not con-sider the projected feed size distribution it is likely that this mill will reach the expected power …
mill is the energy consumption. The power supplied to the mill is used primarily to lift the load (medium and charge). Additional power is required to keep the mill rotating. 8.1.3 Power drawn by ball, semi-autogenous and autogenous mills A simplified picture of the mill load is shown in Figure 8.3 Ad this can be used to establish the essential ...
Our system has been shown to: Decrease critical impacts against your mill lining by up to 45%. Reduce power consumption for grinding by up to 6%. Lift production by up to 6%. Reduce process variability by up to 30%. Increase safety by preventing unexpected shutdowns. A better way to run your SAG Mill.
SAG Mill Power. SAG milling can be optimised to achieve maximum breakage and throughput (or any other number of objectives). The relationships between the key variables are highly non-linear and shift as the ore hardness, steel load and liner conditions change. Traditional and basic control and modelling techniques are therefore not veryfective.
consequence has been that as long as the mill is consuming the expected power, there is little concern about the class of bodies using the supplied energy1. Sensing load movement: the Impactmeter* (patent pending) In recognition of ore variability, many current SAG mills …
Reducing mill power consumption by up to 7% Increasing mill work index through more efficient grinding. With More Than 100 Installations Worldwide, Eriez Trunnion Magnets are a Proven and Better Approach to Maximize Productivity and Reduce Power Consumption in Ball/SAG Mill Applications
2 days ago The results show that integrating solar power into the operation of a SAG mill has potential to reduce the total energy cost by 27%. Robustness against climate change can be achievedwith an increase in total cost of 1%. Finally, use of stockpiles to manage the ore supply to the mill and minimize the energy cost to process it results in a cost ...
Harmonic Filter for Energy Efficient Manufacturing This Rolling Mill derived multitude betterments; solved waviness in sheet metal got rid of dc drive failures and achieved energy saving by installing harmonic filter. Waviness relates to widely placed variations in the surface texture a key quality parameter of the final sheet metal product. Mill operators reported reduced humming noise with ...
milling power draw, the rock quality data (RQD ) and a function relating copper grade and drop weight index (DWI), and work index independently of ore domains FreeportMcMoRan’s project Amelunxen et al (2011) The tradeoff economics of SAG mill and HPGRbased circuits were
Ball Mill Design/Power Calculation Apr 08, 2018 A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a
The mill power draw models used in SAGMILLING.COM all reference power as drawn at the mill shell. Most surveys report power values as they are measured in the plant distributed control system (DCS), which is usually relative to the motor input power. Refer to the Measurement of power article for description of how to convert DCS indicated power to mill power at the shell.
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