6/1/2005 · If you use very soft rock in a SAG mill it will not work as well as if you use harder rocks. Adjustments to the lifting plates around the circumference of the mill provide greater lift and drop and thus greater efficiency. SAG mills are often used as regrinding mills after a fully autogenous milling. Thus giving them a lower efficiency as they ...

Learn MoreThe net effect is an increase in rock mass, and the feed rate to the mill must be decreased appropriately to maintain rock-to-ball ratio. On the other hand, when the ore is soft, the field of breakage reduces the ore size rapidly, and hence the rock mass decreases. To sustain a set rock …

Learn More1/1/2016 · The SAG mill had a 6–8% ball charge and the power consumption was 8 kWh/t, which agreed well with the expected value. 9.6. Problems. 9.1. In an 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.

Learn More9/1/2001 · soft sensing via Kalman filtering. ... with 48 rows of 30 degrees face resulted in less rock . ... or forward-feeding crushed pebbles to the ball mills has an even larger effect on SAG mill capacity.

Learn More4/1/2013 · 1. Introduction. The Run-of-mine composition strongly affects autogenous mill operation. However, the effects of a varying ratio of hard and soft components in mill performance are not described by the current generation of AG/SAG models (Stange, 1996).For example, current JKSimMet models (Napier-Munn et al., 1996) assume a uniform feed, and describe it using a single set of average …

Learn MoreFor design purposes, you need an estimation or prediction of your SAG Mill’s tonnage; well, there are 3 ways to generate good rock “ore” hardness testing data for SAG and ball mill circuit grindability from half drill core. We can abbreviate the discussion by saying there are three “religions” of grinding, and there are small-scale tests suitable for all three of the major religions ...

Learn MoreMining engineering – SAG Mill – Eng-Tips Forums. I personnally have not seem a SAG this inefficient. If you use very soft rock in a SAG mill it will not work as well as if you use harder rocks. »More detailed

Learn Morewas surprising that the Bond Rod Mill Wi average was 11.3 kWh/t. Since the ore is unusually soft, the Rod Mill Wi is probably irrelevant in determining required power for the SAG mill. Drop Weight Tests Drop Weight tests were done at Hazen and analyzed by Contract Support Services, Inc. Table 4: Summary of 6 JKTech Drop Weight Tests

Learn MoreWhen the feed size of a SAG mill becomes coarser, ... (600 kW) are suited to small scale soft ore (100-300 t/h) operations. ... The orebody contains a mixture of hard rock, softer material, and ...

Learn More9/23/2014 · The El Teniente SAG mill foundations had to be stiffened as did the stator frame to ensure there would be no vibration because the soil properties were very poor. Foundations cannot be built on piles. Wrong again. There are successful examples of piled mill foundations. The mill vendor should be responsible for the system analysis. Wrong.

Learn Moresag ball mills, sag ball mills Suppliers and . 1,633 sag ball mills products are offered for sale by suppliers on Alibaba, of which mine mill accounts for 1% A wide variety of sag ball mills options are available to you, such as 1 year You can also choose from construction works , building material shops, and energy mining sag ball mills, as well as from ball mill sag ball mills

Learn MoreRocky DEM helps Sandvik design optimal rock crushing and screening equipment . VIEW CASE STUDY. View all case studies "We have been using Rocky DEM for almost one year and have found it essential to our process: It has proved to be the only one with flexible fiber model coupled with CFD — flow solution and real representation of the particles ...

Learn MoreHome > Product >soft starter for rock grinding mill. soft starter for rock grinding mill. 2020-06-18T02:06:08+00:00 MTW Series Heavy Type European Grinding. Output size : 1.6-0.045 mm, the fineness is 0.038mm Production capacity : 3.5-45T/H PROCESSED MATERIALS limestone, calcite, barite, dolomite, potassium feldspar, ...

Learn MoreMill (grinding) Wikipedia. SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also 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.

Learn Moreoptimization of sag mill circuit in cambodia optimization of sag mill circuit in cambodia Modifications to the SABC comminution circuit included an increase in the SAG mill ball charge from 8 to 10 vv an increase in the mill ball charge from 23 vv to 27 vv an. More Info; Grinding mills.

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