calculations on mass balance on ball mill circuit. Ball mills are used primary for single stage fine grinding, regrinding, and as the second stage in two stage grinding circuits. According to the need of customers, ball mill can be either wet or dry designs.…. According to customers' requirements, GM success in absorbing foreign experience ...Semi-Autogenous Grinding (SAG) mill and a ball mill. The SAG mill circuit also includes a single-deck screen and a cone crusher while the ball mill circuit utilizes hydrocyclones. Currently, the grinding circuits are inefficient in achieving the aspired product fineness of x. P, 80 ...

SAG milling extends itself to many applications due to the range of mill sizes available. They 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 done by a ball mill. SAG mills are also an optimum solution for wet grinding since crushing and screening in these ...The circuit comprises a SAG mill, 12 m diameter by 6.1 m length (belly inside liners, the effective grinding volume), two pebble crushers, and two ball mills in parallel closed with cyclones. The SAG mill is fitted with a 20 MW gearless drive motor with bi-directional rotational capacity.

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. Because of the range of mill sizes available, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill circuit. A diagram of types of AG/SAG ...2 parallel SAG Mills each feeding 2 parallel Ball Mills (4 total). Around 50,000 TPD total grinding circuit capacity.

the SAG mill. This work will look at the effect of removing fine material in the cyclone underflow through fine screening to reduce the re-circulating load. Possible installation of a ball mill to treat the cyclone underflow on milled tonnage is also explored. Freda Rebecca consists of an underground mine and a processing plant.Siddall, G. B. (1989). A review of SAG milling in Australia.SAGSEM 89. Murdoch University, Perth, Western Australia, Nov-Dec 1989. pp 8-22. CONCLUSIONS This paper has covered briefly the problems involved in the production of an expert system for a SAG/ball mill circuit on a remote Australian site.

It is commonly referred to as a SABC circuit, for Semi-Autogenous Ball mill Crusher (SABC). This circuit shows a semi-autogenous grinding (SAG)/ball mill circuit where both grinding mills are in closed circuit, with the SAG mill closed with a crusher to control the amount of 'critical size' material in the circuit.circuit is shown in Figure1. It is commonly referred to as a SABC circuit, for Semi-Autogenous Ball mill Crusher (SABC). This circuit shows a semi-autogenous grinding (SAG)/ball mill circuit where both grinding mills are in closed circuit, with the SAG mill closed with a crusher to control the amount of 'critical size' material in the circuit.

A possible circuit change would send the crusher discharge to the ball mill circuit, better balancing the work between the SAG and ball mill. When ball mill-limited and with low ore variability, a similar circuit modification redirecting flows can be done. It may be possible to redirect some of the ball mill hydrocyclone coarse fraction back to ...Evaluation of Ball Mill Grinding To evaluate ball mill circuit alternative design variables and operating conditions related to ball mill grinding efficiency. $139 1, 2, 5, 6, 8, 18: 2.00: 20. Evaluation of Circuit Arrangements To evaluate different grinding circuit arrangements in terms of their relative classification system, grinding, and ...

A possible circuit change would send the crusher discharge to the ball mill circuit, better balancing the work between the SAG and ball mill. When ball mill-limited and with low ore variability, a ...of large AG/SAG mills and large ball mills. However, it is necessary to discuss their operation because a Rod mill product has a similar slope to AG/SAG mills. This product slope averages less than 0.5 when plotted on log/log paper and therefore contains an extra amount of ne material fi compared to a PSD, having a 0.5 slope. This fi ne material,

For a SAG and ball mill circuit (flowsheet type SAB): Use the Bond/Barratt SAB models if you have Bond work index test results (requires ball mill work index, rod mill work index and impact crushing work index). [future SMC models, not available yet] Use the SAB SMC models if …The results showed that the HPGR-ball mill circuit achieved a 21% reduction in energy consumption over the existing SAG-ball mill circuit at the same P80 grind size of 160 mircons (μm). At a grind of 80% passing 75 μm, the HPGR-stirred mill circuit showed a 34% …

The ball-mills in SABC circuits are operated at a relatively high speed (70-78% of critical speed), with large balls (50 mm to 80 mm), to cope with a coarse feed (a transfer size from the SAG mill ...WiBM is the Bond ball mill work index, unitless CFnet is an empirical adjustment to a ball mill circuit [CFnet = 2.35 - 0.29 × ln(P80)] Morrell Mi model: Morrell (2008) published a two-parameter model based on two equations (3 & 4) to describe a variety of comminution devices, including single-stage SAG and AG mills. The CEE

Rod mill and ball mill circuit models Bond/Rowland rod mill & ball mill model; ... Morrell C-model for SAG & ball mills (phenomenological model with empirical fitting). Sub-divided into: a simplified model with 'typical' defaults and; a full model with all parameters editable.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. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

In this training module, we'll cover the workings of a semi-autogenous grinding mill, or SAG mill, that's designed to be the first stage of a grinding circui...1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powder-like structures. 3.

done in a SAG/ball mill circuit with no coarse recycle classification of the SAG mill discharge. The primary grinding mill is an 18 ft. diameter x 9 ft. EGL, 1500 HP variable speed SAG mill and the secondary mill is a 13 ft. diameter x 21 ft. long, 2000 HP fixed speed, ball mill.Where the SAG mill/ball mill circuit is the bottleneck in the processing plant the pebble circuit can be a significant factor in limiting overall plant capacity. The pebble circuit recirculating load can be very significant (depending on the ore characteristics and …

A plant has four crushing stages before the material is fed into the milling circuit comprising a SAG and a Ball mill. The feed size to the first crusher is 80% passing 1,500mm with a reduction ratio of 2. The reduction ratios of the four crushing stages and that of the …Amelunxen SGI Model. This is a model that estimates the specific energy consumption of a SAG or AG mill plus ball mill circuit using the equation by Amelunxen (2014) for E SAG and the classical Bond work index equation for E ball substituting CF ball in the place of the Rowland efficiency factors.. The model requires manual calibration factors for both equations (CF SAG and CF ball ...

SAG Mill Grinding Circuit Design - 911metallurgist. Jun 06, 2016· This refers to high-aspect AG/SAG mills. Ball Charge Motion inside a SAG Mill. With a higher density mill charge. SAG mills have a higher installed power density for a given plant footprint relative to AC mills.A SAG/ball mill circuit using the largest . commercially available ball mill in conjunction with a proven SAG mill . design was selected as the preferred option. This circuit would be .

difference between sag mill and ball mill Solution for · The operating cost difference between the two circuits is driven by the difference in ball mill steel wear between the SAG/ball mill circuit and the crushing/HPGR/ball FLFL breaks world record in Chile. Before the Esperanza order FL s largest SAG mill measured 38 and its ball mills 26 .Following the upgrades in the SAG mill circuit, sampling and modeling of the ball mill circuit identified a bi-modal hardness characteristic of the ore. valuation with both MetCom and JK SimMet®E lead to changes in the ball make up size from 75 mm to a 50:50 mix of 75 mm and 38 mm.