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2013-12-24The Bond Work index Wi was calculated from the following equation Eq. 1 Wi 44.5P1 0.23 X Gbp0.82 10P 80 12 10F 80 12 Eq.1 Where F80 is the sie in microns at which 80 percent of the new feed to ball mill passes P80 is the sie in micron at which 80 percent of the last cycle sieve undersie product passes
2020-5-16The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial comminution plants designing. Determining the Bond work index value is quite complicated timeconsuming and requires trained operating personnel and therefore is subjected to errors
Equipment design for ball mill. The Description and Function ofBall Mill Ball millis the keyequipmentfor recrushing the materials after they are primarily crushed.Ball millis widely used for the dry type or wet type grinding of all kinds of ores and other grindable materials in cement silicate product new building material refractory fertilier black and non-ferrous metals and glass
Related. The list of acronyms and abbreviations related to BWI - Bond Work Index
2020-3-22BondRowland Single Stage Ball Mill Model. This is a multi-stage crushing plant feeding a ball mill model that estimates the specific energy consumption E BM using the Rowland interpretation of the classical Bond work index equation including Rowland efficiency factors.. Testwork Required
First a Jar Mill grindability test requires a 5 lb. 2 kg sample and produces a direct measured specific energy net Hp-hrt to grind from the design feed sie to the required product sie. The second test a Bond Work Index determination results in a specific energy value net Hp-hrt from an empirical formula
Numerically the work index is the energy required in kwht to reduce a given material from theoretically infinite feed sie to 80 passing 100 microns. The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test. Bond developed separate tests for the rod mill and the ball mill
2020-6-11Bond Ball Mill. October 5 2015. LABPILOT PLANT EQUIPMENT. This 12 x 12 ball mill is universally used for grindability testing and determination of the Bond Work Index. Mill comes complete with ball charge and control panel with automatic revolution counter
2020-6-10Bond Ball Mill Grindability Test Christina. 202053Bond Ball Mill Work Hardness Jktech. Jktech laboratory laboratory servicesthe standard bond rod mill work index test procedure is firstly to stage crush the feed to pass 127 mm and sie a representative sample the test then involves a series of batch grinds in a standard bond rod mill a bond rod mill is 0305m by 0610m with wave liners of a form
Limestone Bond Work Index. Limestone Bond Ball Mill Work Index.Bond mill work indexforlimestoneceueuball mill bond workindeand forlimestone ball mill bond work indexforlimestonegold orecrusher ball mill bond work indexforlimestonethe enith is the professional gold mining equipments manufacturer in the world located in chinaindia along with other
2013-5-6Two projects having the same Bond ball mill work index 13 kWht had SAG hardness as low as 1.4 kWht in one case Aurora and up to 34 kWht in the other case where NICO data was reported in January 2010 at the CMP in Ottawa. This proved that a Bond BM Wi alone must never be used for designing a SAG mill
D mill diameter in meters. The Marcy expression is applicable for mill diameters between 1.52 to 4.1meters. Using peripheral speed the rotational speed can be determined. Bond quantified the rod mill power draw as a function of the Work Index capacity and a series of correction factors PM Wmtesti FT Q. FT F1 F2 F3 F4 F5 F6
The Bond Ball Work Index Test determines the resistance of ore to grinding in a ball mill expressed as a work index kilo Watt-hour per ton kWht. The work index is then used to calculate the specific energy requirements for siing ball mills or determining their throughput for a
2018-10-24The work index can either be measured in the laboratory the Bond ball mill work index determination is a common example or it can be calculated from the operating performance of
The EDEMET Bond Mill is designed to perform the Bond ball mill work index test to determine the grinding energetic consumption of diverse minerals. As this is a standard test its design has been maintained according to the traditional equipment. Aditional information about the EDEMET Bond Mill can be found currently in our spanish websites www.edemet.cl
2015-4-16Table I shows the Bond ball mill work index obtained for the ore samples as well as the iron and silica content in concentrate and tail after LIMS. The concentrate weight recovery was in the order of 5060. Furthermore it may be observed that the Bond ball mill work indices for the ore Wi varies from 14.6 to 20.9 kWht
2014-10-1submitted to the Bond ball mill work index test. The number of SAG mill revolutions required to grind the material to a P 80 of 1.7 mm is used to predict AGSAG specific energy using quation 4. Correction E factors for feed sie and pebble ing are applied to
2013-5-6standard Bond crushing and rod mill work indices abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed and Standard Autogenous Grinding Design SAGDesign Tests patented by Outokumpu. See reference 8 below. The comparison of these results gives context to how the various measurements relate to each
2018-2-20Mill Ball Mill Closed circuit crushing to 16 mm Open circuit 8 dia. rod mill to 1 mm Closed circuit 8 dia. ball mill to P80 um The ore Test Work Index Circuit Operating Work Index 9 The Standard Bond Circuit Coarse Ore Bins Fine Ore Bins Screen Crushing Screen Classification Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL WORK
The Bond Ball Mill Grindability Test is a locked-cycle laboratory grinding test. It provides the Bond Ball Mill Work Index which expresses the resistance of a material to ball milling. This Index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill scale-up
Generally Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power. In the current research a simple fast and accurate procedure is introduced to find the
We have procedure of calibrate ball millHere is the old Allis-Chalmers Bond Work Index Grindability TestProcedure. The standard feed is prepared by stage crushing to all passing a 6 mesh sieve but finer feed can be used when necessary. It is screen analyed and packed by shaking in a 1000-cc graduated cylinder and the weight of 700 cc is placed in themilland ground dry at 250 per cent
2013-12-24using a novel ring mill a laboratory ball mill a labora- tory rod mill and the semi continuous process using the same rod mill as described below. In all cases the min- eral sample is crushed and screened to pass a predeter- mined sie 3.5 or 4 mm. The feed sample undergoes a wet screen analysis and a certain quantity usually 0.5
2018-2-20Bond Test WIs kWht Rod Mill Ball Mill 9.5 kWht.8 9 kWht . Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sieof 19300 m although some of this work might ideally be done by crushers to achieve a rod mill