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The test work program was carried out on those five ore samples obtained from the copper-porphyry orebodies. Total of 38 Bond work index tests, including duplicates, were done. Standard Bond ball mill test procedure were carried out on crushed ( …
The bond work index test obtained high work index 52.60 kw.h/t and consumed power 11.72 kw.h/t to grind one ton of low grade iron ore and this attributed to the high concentration and hardness of ...
laboratory tests, typically Bond ball mill Work Index and SMC test® / JKDWT A*b (Bond, 1961; Morrell, 2004). Due to budgetary constraints, this has curtailed the collection of suffi cient number of BMWi or A*b measurements to allow the inherent variability to be adequately quantifi ed for direct
TEST WORK qBond Work Index Testing Bond Ball Work Index Bond Rod Work Index Bond Crushability Work Index Bond Abrasion Work Index qJK Tech Testing JK Drop weight Test SAG Milling Comminution Test (SMC) COMMINUTION PILOT PLANT qAG/SAG Pilot Milling Mill dimensions: Ø1.7m x 0.6m length Typical throughput 0.5 -3.5 t/h depending
standard 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
4.4.2 Bond Ball Mill Work index Results: Wi=25.23 kwh/t Reduction ratio is 2.98 Analysis: The sub-samples were compared to determine BWi (Bond Work Index) for unknown sample. With formation of trendline with respect to the size distribution for known and unknown samples, F80 and P80 for respective sub-samples was obtained from the interpolation ...
Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond's Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle breakage and equivalent to the work represented by the product – the feed.
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 systematic investigation was carried out to predict Bond's work index using simple field measurable properties of rocks. Tests were conducted on Basalt, Slate and Granite using a laboratory scale ball mill and rock properties namely density, Protodyakonov's strength index and rebound hardness number were determined.
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...
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 ...
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.
Rod Mill Index - Fontanero Heavy Machinery. Bond Rod Mill Index Test Jktech. Measuring ore grindability in rod mills. The Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill. It can be used to determine the grinding power required for a given throughput of …
The ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index. For grinding circuits where the feed to a ball mill is sent directly to the classifier and the cyclone underflow feeds the ball mill (see Figure 3.10), a question arises as to whether this practice will alter the ball mill work index (BW i) of the material ...
An improved method using less mass compared to the Bond Ball Mill Work Index test. The JK Bond Ball Mill (JKBBM) test, is a locked cycle grindability test conducted using a standard laboratory Bond Ball Mill with the same steel ball charge and material feed size ( passing 3.35 mm) as the Bond Ball Mill Work Index test. Read More
Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick …
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
Introduction of the Bond work index w i to the above equations Hard ore 18.0 1.961 Medium ore 12.0 1.290 Soft ore 6.5 0.671 Coefficients k Bond work index (w i), kWh/short ton Denver ore-hardness Table. Relationship between the Bond work index (w i) and the ore hardness designated by Denver
Bond Ball Mill Work Hardness Jktech. Bond method for ball mill work test lab3d bond ball mill work index clinker jul 31 2015 a new approach toward estimating the bond ball mill work index bbwi by keywords work index bond method kinetic grinding test grindability ball mill of different ores and materials such as copper iron and clinkers get price
Jan 23, 2018· A Bond Ball mill grindability test was performed utilizing a limiting screen size of 150 µm and indicated that the sample has a Bond Ball Work Index value of 18.5 kWh/t. * The Thor Deposit forms part of the project formerly referred to as the Viking Project.
bond mill work index - arcadria.eu. Bond Mill Work Index For Limestone - ausa6region.org. The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. limestone bond ball mill work index ...
An alternative mill ball charge is proposed that closely approximates Bond's original total ball mass, number of balls and ball surface area. Results of 30 Bond Work index tests of six pure materials (calcite, magnesite, labradorite (feldspar), quartz, andalusite and glass) using closing screen apertures (P 1) values of 500, 250, 125, 90 and 63 ...
3- STANDARD BOND TESTS The Bond's standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80% passing 100 µm. If the breakage
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. Use of Work Index Along with comminution circuit design the work index parameter is widely used in tracking mill performance. Due to the age and lack of controls for the test,
This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.
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.
Chapter 3 - Particle Technology (Size Reduction) Kick's law: the work required for crushing a given mass of material is constant for the same reduction ratio, ... 3.2.2 Bond crushing law and work index.
Bond Ball Mill Work Index Hardness Jktech. Bond Ball Mill Work Inde Da Ase Jktech. Mar 11, 2020 Bond 039 s work index ball mill details specificat. Jktech laboratory services bond ball mill index test brmwi a bond ball mill index test bbmwi is a standard test for determining the ball mill work index of a sample of ore the bbmwi is a measure of ...
Aug 18, 2021 Bond abrasion index A i [g] 0.081 Crusher (impact) work index [kWh/t] 5.4 Bond ball mill work index [kWh/t] 8.0 JK DWT parameter A b 63.1 2.26 = 142.6 JK parameter t a 2.56 P95 in the product feed to flotation [mm] 0.150 The ore in question is exploited in openca st mining.
Relationships between comminution J energy and product . Table 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 50–60 Furthermore it may be observed that the Bond ball mill work indices for the ore Wi varies from 14.6 to 20.9 kWh/t.
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
particle size are calculated and the Bond ball work index is then calculated using the standard Bond ball work index formula: 𝑊𝑖= 44.5 𝑃0.23·𝑔𝑏𝑝0.82·[10 √𝑃80 · 10 √𝐹80] [2] where W i represents the Bond ball work index, F 80 and P 80 are the feed and product particle sizes,
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 …
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