If P is less than 80% passing 70 microns, power consumption will be; Ball Mill Power Calculation Example #1. 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 size distribution of 80% passing ¼ inch (6350 microns). The required product size distribution is to be 80% passing 100 mesh ...
WhatsApp: +86 18838072829
the SAG mill and pebble recycle stream. Based on experience and the energy curve database, a typical primary crusher and the SAG mill can be assumed 1,000 m apart, consuming about kWh/t in conveying power. Another 250 m of conveying can be assumed to be required for the pebble
WhatsApp: +86 18838072829
The proportion of SAG and ball mills in producing the final product (particles finer than 74 µm) was % and % respectively. That is, the SAG mill produces about % more than the ball ...
WhatsApp: +86 18838072829
Ball consumption varies with the fineness of the product, hardness of the ore, quality of ball, and whether a mill is run in closed or open circuit. The ball consumption for mills delivering a coarse product, all passing 8mesh and containing 10 to 20 per cent, below 200mesh, the mill being run in open circuit, is about ½ lb. per ton for ...
WhatsApp: +86 18838072829
Models for the prediction of the power drawn by ball, semiautogenous and fully autogenous mills have been developed and cited in the technical literature ( Turner, 1982, Austin, 1990, Moys, 1993, Morrell, 1996 ). However, none of these models considers the feed size distribution as a design variable.
WhatsApp: +86 18838072829
Table 3 shows a comparison of the actual operating power consumption of the SAG and ball mill to the reworked and originally designed SABC circuit model, with the pebble crusher in operation. From Table 3, it can be seen that the reworked model, obtained from the JKSimMet simulation, and the actual operating circuit have a similar SAGtoball ...
WhatsApp: +86 18838072829
A notable exception is the Morrell's model (Morrell, 2008, Morrell, 2009). In his approach the total specific energy of the entire AG/SAG circuit is firstly predicted using the SAG mill feed F80 and the ball mill cyclone overflow P80.
WhatsApp: +86 18838072829
Just published is some Newmont data in a paper at SAG 2011 on both SAG and ball mill steel consumption. The ball mill wear data reflected a factor on the Bond equation consistent with Arts observation above. I also like the Molycop equation Levi has discussed for ball mills although it does seem to reflect slightly higher wear rates than ...
WhatsApp: +86 18838072829
A research team from the University of Utah is working to make inroads into saving energy in these SAG mills. In 2003, Industries of the Future Program of the Department of Energy tasked the University of Utah team to build a partnership between the University and the mining industry for the specific purpose of reducing energy consumption in SAG mills.
WhatsApp: +86 18838072829
results in less impact on the ball charge, with a corresponding decrease in ball breakage and ball FIGURE 8 illustrates the measurement of power under consumption. closely controlled conditions on the 40 ft ( m) diameter Cadia SAG mill.
WhatsApp: +86 18838072829
Tubular Ball Mills . 01 01 2016 A 5 5 m 5 5 m ball mill is lined with single wave liners 65 mm thick which cover the entire inside surface The centre line length was 4 2 m and the trunnion diameters 1 5 m in diameter The mill was charged with an ore and 100 mm diameter steel balls as the grinding media so the total filling of the cylindrical section was 40 and the ball fractional filling was 0 15
WhatsApp: +86 18838072829
SAG circuits may employ low to relatively high ball charges (ranging from 2% to 22%, expressed as volumetric mill filling) to augment autogenous media.
WhatsApp: +86 18838072829
The SAG mill specific energy consumption (E SAG) is calculated using the 1979 Barratt equation and the ball mill specific energy consumption (E bm) This model includes a phantom cyclone effect in the equations due to the ball mill being calculated by difference and not being calculated by the normal Bond equation. The resultant operating work ...
WhatsApp: +86 18838072829
Ball milling capacity can be justified if the incremental decrease in specific power consumption for the primary mill, for example between 500 and 1000 microns for primary mill circuit product. ... Current operational results show that the SAG mill is operating at 5% ball charge level by volume and is delivering a K80 800 micron product as ...
WhatsApp: +86 18838072829
The average saving in energy consumption was about 13% and a saving in ball consumption of 25% applies. ... Modifications to the SABC comminution circuit included an increase in the SAG mill ball ...
WhatsApp: +86 18838072829
As one of the machines widely used in mining, a semiautogenous grinding (SAG) mill can significantly improve the roughing efficiency of rock. But the SAG mill still faces the obstacles of significant energy consumption and empirical operation parameters. In order to obtain the optimal operation parameters of a SAG mill, in this paper, the discrete element method (DEM) is used to simulate the ...
WhatsApp: +86 18838072829
Ball Mills or Rod Mills in a complete range of sizes up to 10′ diameter x 20′ long, offer features of operation and convertibility to meet your exact needs. They may be used for pulverizing and either wet or dry grinding systems. ... Their average relative grinding ball consumption is approximately as follows: Chrome: highcarbon: castiron ...
WhatsApp: +86 18838072829
Rajamani,, Mishra,, 1996. Dynamics of ball and rock charge in sag mills, in: Proc. SAG. ... on various aspects such as energy consumption, mill efficiency, minerals liberation and ...
WhatsApp: +86 18838072829
However, the effects on power consumption and mill capacity have been the same, confirming the strong effect of small variations in the ultrafines production. ... it can be fed to the SAG mill. In that case the ball mills are fed with a fraction of the SAG mill discharge, as in the original circuit (Figure 1).
WhatsApp: +86 18838072829
time [1]. Fig. 1 exhibits Residence Time Distribution (RTD) in a ball mill. Fig. 1. Residence time distribution in a ball mill [1] There are two main breakage mechanisms in a SAG mill: the impact breakage (high energy) and the abrasion (low energy). The JKMRC institution uses t10 is the percentage of breakage product that passes
WhatsApp: +86 18838072829
The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills 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 of a ball mill.
WhatsApp: +86 18838072829
Browse 's wide offering of reliable grinding mills: AG mills, SAG mills, ball and pebble mills, and stirred mills to fit your needs. Our pioneering innovations in horizontal grinding mills technology offer exceptional performance and unmatched expertise. ... availability, or reduce energy consumption. Explore Grinding customer cases, blogs ...
WhatsApp: +86 18838072829
A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
Copyright © 2023 GMC Co., Ltd. SiteMap
