(Axb value) and ore hardness (Bond ball mill work index), including allowances for plant ramp up. Table 1 - Estimates of Maximum Plant Capacity . Ore Type Maximum Mining Rate, t/h Year 0.5 1 2 4 to 6 7 ; Hypogene 2000 2300 2550 2550 3000 Supergene 2500 2850 3167 3167 3167 Skarn 2500 2850 3167 3000 3167 ...

Bond Ball/Rod Mill Work Index. Bond ball mill work index (BBMWI) test is a standard test used to measure the ball mill work, which is calculated in accordance with the procedure proposed by the Bond [21]. The BBMWI determines how much energy is needed to grind a …

Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1, ... Comminution Tests, Bond Work Indices, JKTech, Grinding Mill Design, Database, Ore Hardness Measurements, JK Drop Weight Test, SAGDesign Test ... Bond rod and ball mill work indices are readily converted to

micrometers in size. According to the Bond standard procedure, the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250% circulating load (Bond, 1949, 1952, 1961). The test is performed on a raw material approximately weighing 10 kg, which coarseness is -3.327 mm.

Bond ball mill work index test. Sample selection· Inquire Now; Bond Ball Mill Index Test JKTech. Measuring ore grindability in balls mills. The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. Inquire Now; bond grinding index of clinker crusherasia.com

A total of 9 kWh/t of grinding energy was indicated and this could be provided either in a single stage SAG mill to produce the P80 200 micron product, or a two stage circuit with equal power on the SAG and ball mills using the design Bond Wi of 11.5 kWh/t. A number of conclusions were drawn from this work. Some are presented here.

Safety is a prime consideration for all Alsto equipment and the Bond Index Ball Mill is supplied equipped with acoustic enclosure. The ball mill is designed to accept a ball charge in accordance with F. C Bond's standard. This ball charge consists of 286 balls as follows: 44 x 35mm balls. 67 x 30mm balls. 10 x 25.4mm balls, 71 x 19.05mm balls ...

A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s). Sample requirements: A minimum of 8 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample to minus 3.35 mm, as required for the Bond Ball Mill Work Index test feed.

hardness testing using semi-autogenous grinding (SAG) feed samples in forecasting the SAG Mill/Ball Mill (SAB) grinding circuit performance. Daily samples were collected over a two-month period and submitted for Hardness Index Tester (HIT) evaluation to provide estimates of the competency (Axb) and grindability (Bond ball mill work index [BMWi]).

Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1, ... Comminution Tests, Bond Work Indices, JKTech, Grinding Mill Design, Database, Ore Hardness Measurements, JK Drop Weight Test, SAGDesign Test ... Bond rod and ball mill work indices are readily converted to

Bond Work Index an overview ScienceDirect Topics. Ball mill design requires a Bond work index, BWi, for ball mills at the correct passing size; SAG mill design requires an appropriate SAG test, for example, SPI (Chapter 5) Flotation design needs a valid measure of kinetics for each sample, including the maximum attainable recovery and rate constants for each mineral (Chapter 12) Take care to ...

DWi and point load index (IS50) making it valuable in Mine-to-mill studies as well. For power-based calculations the SMC Test® also provides the comminution indices Mia, Mih and Mic,which are routinely reported when a test is carried out (see Table 1 below). In conjunction with the Bond ball mill work index they can be used to

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In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: AG and SAG mills, Ball mills, Rod mills, Crushers, High Pressure Grinding Rolls (HPGR).

Bond Ball Mill Index Test Jktech. The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. It can be used to determine the grinding power required for a given throughput of material under ball mill grinding conditions. Details

A*b ranged from a very hard 25 to a soft 118, although the majority were between 30 and 55. • Grindability as indicated by the bond ball mill work index (BWi) ranged from 10–35 kWh/t, with the majority between 15 and 27 kWh/t. No clear relationships in terms A*b and/or BWi was identified with geological aspects logged from the drill

Bond Ball Mill Work Index Hardness Jktech. However in the majority of cases 1520 kilograms is more than enough to conduct a single test also remember that the products from the smc test can be reused for bond ball work index testing the smc test being effectively used as a feed preparation step fo,Bond Ball Mill Work Index Hardness Jktech.

a modified Bond ball mill procedure (Mod Bond) was developed by MinnovEX Technologies (now SGS) which requires 1.2kg of sample crushed at minus 3.35mm. The 1.2kg charge is milled with the standard Bond ball mill for a set time. A particle size analysis is performed on the feed and ground product, and a modified work index is calculated using a ...

Bond Ball Mill Index Test JKTech. 29 ensp 0183 ensp The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill It can be used to determine the grinding power required for a given throughput of material under ball mill grinding conditions It is a locked cycle test conducted in closed circuit with a laboratory screen

bond ball mill work hardness jktech. Comparison of Ore Hardness Measurements for Grinding . Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1. Bond Work Indices, JKTech, Grinding Mill Design, Database, Ore Hardness Measurements, JK Drop Weight Test, SAGDesign Test . abrasion indices and by ...

Grinding Solutions offers the following tests for SAG mill testing and/or sizing. JKTech Drop Weight The JKTech Drop-Weight Test measures the breakage characteristics of an ore for five size fractions in the range of 13 to 63 mm, at various energy inputs (0.1 to 2.5 kWh/t). The ore-specific parameters derived from these measurements can be used in grinding circuit...

Bond Ball Mill Work Indices. ... All JKTech Power data adjusted ... The testwork was conducted with −25 +4 mm and −8 +4 mm kimberlitic ores of varying hardness.The Hicom mill's response was ...

the relative grindability of different ores in ball milling (Bond, 1961 and Rowland and Kjos, 1980) To use the Bond ball mill work index to determine the ball mill specific energy required for a particular grinding task, the Bond equation must be used and the various relevant efficiency factors applied. In

• The Bond Ball Mill Grindability Test determines the Bond Ball Mill Work Index used to determine net power requirements when sizing ball mills. The test is a closed-circuit, dry grindability test. It is run in a standard ball mill and can be performed at mesh sizes ranging from 48 mesh to 400 mesh. Bond Ball Mill Work Index (and modified ...

operating work index) is also presented a product of for each simulation. For Greenfield design of an AG/SAG-ball mill circuit with JKSimMet, the additional power requirement in the ball mill(s) is determined with the Bond ball mill work index and the phantom cyclone technique. COMMINUTION Trusted Bench Scale and Pilot Scale

hard grove grindability index iron ore 3 3 Hardgrove Index The ... in balls mills The Bond Ball Mill Work Index is a measure of the resistance of the material to ... JKTech Laboratory Services The BBMWI is a measure of the resistance of the material ...

an average work index of 15.5 kWh/t. A very broad range of results was received, characterising the 'standard ore' from medium to very hard. A disappointing result considering the reliance on this test globally for design and optimisation. An improved method using less mass compared to the Bond Ball Mill Work Index test.

Axb: JK Drop Weight Test ore hardness index BBMWi: Bond Ball Mill Work Index C i: Crushing parameter COV: Coefficient of variation DWi: Drop Weight Index ... (JKTech, 2017b) ..... 37 Figure 11 SMC Test® drill core diamond saw cutting (Morrell, 2004). ..... 38 Figure 12 Ecs vs t10 curve for Ore 1 and 2 (a) full curve (b) close up at 0,25 kwh/t ...

The Bond ball mill work index test has been used for ore hardness characterization for more than 80 years. Nevertheless, the test suffers from significant disadvantages when compared with other characterization methods. It is expensive, labour-intensive, the equipment and procedures used are

FC Bond Ball Mill Ball Mill Instruction Manual (PDF) Ball Mill Diagram Sheet (PDF) The software to view and print Adobe Acrobat (PDF) is available for free from the Adobe website Follow the provided icon link to download Acrobat Reader 39550 (220/440v, 3 Bond Work Index Test Ball Mill 911Metallurgist, The FC Bond Work Index Test Ball Mill was designed by F C Bond for use in determining the ...

JKTech would stage crush the sample to minus 3.35 mm, as required for the Bond Ball Mill Work Index test feed. Read More JK Bond Ball Mill Test - JKTech. JK Bond Ball Mill Test Since its introduction in the 1960s, the Bond Ball Mill Work Index (BBMWi) parameter has been extensively used in predicting ball mill power draw.

laboratory ball mill work index can be used to compare the grindability of different ores in ball 4 milling (Bond, 1961 and Rowland and Kjos, 1980).