zhengzhou , china
[email protected]rod mill-ball mill circuit receiving closedcircuit secondary The rod mill circuit could not be simulated The high cost of the SAG ball option is caused by the extremely high cost of the pancake SAG millR86 million alone.
Get Pricerod mill-ball mill circuit receiving closedcircuit secondary The rod mill circuit could not be simulated The high cost of the SAG ball option is caused by the extremely high cost of the pancake SAG millR86 million alone.
crushed ore is fed into a SAGBall mill circuit with a median size of approximately 12000 microns. Most SAG Mills are operated in closed circuit with a screen. The screen lters undersized ore normally minus inch to a ball mill discharge sump. The combined mill discharg-es are pumped to undergo classi cation normally via hydrocyclones.
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 SAGball 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.
Starkey amp Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a clients own ore samples. SAGDesign technology has become a standard for 21 st century grinding circuit design for the following reasons Precisely measures SAG and ball mill
AGSAG Wio AWio kWht 28.5 Ball Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWht 13.4 Bond Rod Mill Work Index RWi kWht 18.1 Table 1. Example of AGSAG Ball Mill Circuit Wio Calculations 1 2 ABstrAct Optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have
A survey of a SAG-ball mill circuit processing ore from primary crushing showed size reduction of circuit SAG feed F 80 of approximately 165000 m to flotation circuit feed cyclone overflow P 80 of 125 m. The total specific energy input for the two milling stages was 14.6 kWh t 1. Calculate the operating work index for the circuit. b.
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 m. At a grind of 80 passing 75 m the HPGR-stirred mill circuit showed a 34
Both the autogenous grinding mill and the ball mill feed parts are welded with groove and embedded inner wear-resistant lining plate. As the sag mill does not contain grinding medium the abrasion and impact on the equipment are relatively small. The feed of the ball mill contains grinding balls.
Oct 12 2017 SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9 to 20.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.
The circuit consists of a 34 x 20 EGL SAG mill a Raptor 900 pebble crusher and two 24 x 396 ball mills. Each mill is equipped with a 2 x 8500HP dual pinion drive system. The plant was designed to process 1585 h mtpof SAG feed. From startup the mill struggled to meet the required production rates.
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 SAGAG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28000 kW.
Aug 01 1992 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 SAGball mill circuit on a remote Australian site.
CFnet is an empirical adjustment to a ball mill circuit CFnet 2.35 - 0.29 lnP80 Morrell Mi model Morrell 2008 published a two-parameter model based on two equations 3 amp 4 to describe a variety of comminution devices including single-stage SAG and AG mills.
Where the SAG millball 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 SAG mill operating dynamics.
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 SAGball 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.
Starkey amp Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a clients own ore samples. SAGDesign technology has become a standard for 21 st century grinding circuit design for the following reasons Precisely measures SAG and ball mill
Single stage crushsingle stage SAG mills and two stage crushball mill circuits are typically selected for low throughput plants 50 th where personnel costs are a large component of costs. SAB circuits are typically selected for plants of 0.5 to 2 Mta.
Ball mill Wi test feed size F 80 m Ball mill Wi grams per revolution at test conclusion gpr Required parameters. F 80 m is the 80 passing size of the fresh feed to the circuit expected to be a Bond-compatible size distribution. P 80 m is the 80 passing size of the circuit product expected to be a Bond-compatible size .
supported grinding mills up to the largest sizes. SAGball mill circuit incorporating pebble crushers and a POLYCOM high-pressure grinding roll. SAG and ball mill for gold ore grinding. One of three SAG mills with 9.75 m diameter and 2 x 4000 kW drive power. These mills operate in conjunction with ball mills for iron ore grinding in Iran.
Mill consistent with survey 2 exhibiting a finer SAG mill product smaller throughput with a pebble crusher running would have been between 631 transfer size to the ball milling circuit than survey 1 See Figure 6. and 935 dmtph for the feed size distribution achieved by this blast design.
Oct 12 2017 SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9 to 20.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.