Bond Work Index Procedure and Method

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.




  • Ceramic Ball Mill

    Testwork: Bond ball mill work index

    The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index. The test is a locked-cycle test where ground product is removed from test cycles and replaced by fresh feed. The test much achieve a …

  • Ceramic Ball Mill

    Bond Ball Mill Index Test | JKTech

    Bond Ball Mill Index Test. 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 10 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample to minus 3.35 mm,...

  • Ceramic Ball Mill

    Bond Work Index Tests Grinding Solutions Ltd

    The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits The test requires a minimum of 10kg of sample that has been stage-crushed to 100% passing size of <3.35 mm.

  • Ceramic Ball Mill

    Bond Index Ball Mill / Rod Mill BT 100 XL RETSCH

    The Bond Index conforming ball charge consists of: 43 x 1.45” balls; 67 x 1.17” balls; 10 x 1” balls; 71 x 0.75” balls ; 94 x 0.61” balls; The optimum number of grinding balls is 285. However, the ball diameters vary due to wear. Therefore, the total ball number should be adjusted from time to time to ensure a total mass of 20.125 grams. The grinding jar of the Bond Index Ball Mill measures 12″ x 12″ and has well …

  • Ceramic Ball Mill

    Bond Tests | Mining | SGS

    The test is a closed circuit dry grindability test performed in a standard ball mill. It can be performed at mesh sizes ranging from 28 mesh to 400 mesh. The normal finishing size is 100 mesh.

  • Ceramic Ball Mill

    JKTech Laboratory Services

    The standard Bond Ball Mill Work Index test procedure is firstly to stage crush the feed to minus 3.35mm, and size a representative sample. The test then involves a series of batch grinds in a standard Bond mill. A Bond mill is 0.305m by 0.305m, with rounded corners, a smooth lining, and runs at 70rpm.

  • Ceramic Ball Mill

    A quick method for bond work index approximate value

    The Bond ball mill grindability test is run in a laboratory until a circulating load of 250% is developed. It provides the Bond Ball Mill Work Index which expresses the resistance of material to ...

  • Ceramic Ball Mill

    Ball mill Wikipedia

    A ball mill inside the Mayflower Mill near Silverton, Colorado. The ball mill is a key piece of equipment for grinding crushed materials, and it is widely used in production lines for powders such as cement, silicates, refractory material, fertilizer, glass ceramics, etc. as well as for ore dressing of both ferrous and non-ferrous metals.

  • Ceramic Ball Mill

    Procedure for determination of ball Bond work index in the

    Because of the difficulty in determination of this index, alternatives to the standard method have been developed by many researchers (Vedat and Huseyin, 2003). In the determination of ball mill work index 15 kg of representative ore at 100% + 3.35 mm is crushed to 100% − 3.35 mm (Amtech, 2006).

  • Ceramic Ball Mill

    Correction of Bond Ball Mill Work Index Test for Closing

    It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh to give a P80 close to desired grind size. This is because work index frequently changes as a function of the product size in comminution. If target grind size during a project is changed, or if

  • Ceramic Ball Mill

    Ball Mill Work Index Ball Mill Manufacturer from Chennai

    Work Index Ball Mill, alluding to the grind ability list of Metals, is utilized to demonstrate the granulating trouble of the material. It is measured by a rule that to compute the work file ball plant in light of yield of every unrest of the factory after the material is ground to an adjusted state by the predetermined plan.

  • Ceramic Ball Mill

    Comparison of Ore Hardness Measurements for Grinding Mill

    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 other and how they can be used to obtain an accurate design for the grinding mills required for

  • Ceramic Ball Mill

    ball mill grindability

    The Bond ball mill grindability test gives the Bond ball mill work index. This. F.C. Bond -- Ball Mill - BICO Inc. Designed by F.C. Bond for use by cement companies and quality control laboratories throughout the world. Can be used in calculating the grindability of all ore. Observations on the Bond ...

  • Ceramic Ball Mill

    Bond Work Index an overview | ScienceDirect Topics

    The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of interest, or by …

  • Ceramic Ball Mill

    QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

    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 100% -3.327 mm.

  • Ceramic Ball Mill

    A quick method for bond work index approximate value

    The Bond ball mill grindability test is run in a laboratory until a circulating load of 250% is developed. It provides the Bond Ball Mill Work Index which expresses the resistance of material to ...

  • Ceramic Ball Mill

    Procedure for determination of ball Bond work index in the

    Procedure for determination of ball Bond work index in the commercial operations. The Bond ball mill grindability test is run in a laboratory until a circulating load of 250% is developed. It provides the Bond Ball Mill Work Index which expresses the resistance of material to ball milling. This happens after 7–10 grinding cycles,...

  • Ceramic Ball Mill

    ball mill abrasion index

    A Bond ball mill work index is then performed on the mill product for the design of SAG-ball mill circuits. This is important because it was found that there was a 1–1.5 kWh/t higher ball mill work index if the –3.35 mm ball mill test feed size is obtained by SAG mill grinding compared with crushing.

  • Ceramic Ball Mill

    Ball mill Wikipedia

    Ball mill. The inner surface of the cylindrical shell is usually lined with an abrasion-resistant material such as manganese steel or rubber. Less wear takes place in rubber lined mills. The length of the mill is approximately equal to its diameter.

  • Ceramic Ball Mill

    USING THE SMC TEST TO PREDICT COMMINUTION

    can be determined using the data generated by a conventional Bond ball mill work index test (M ib is NOT the Bond ball work index). M ic and M ih values are also provided as a standard output from a SMC Test® (Morrell, 2009). The general size reduction equation is as follows (Morrell, 2004b): 2 …

  • Ceramic Ball Mill

    Hardgrove Grindability Index Tester with 50g Feed Capacity

    The resulting Hardgrove Grindability Index (HGI) provides a measure of energy required in a grinding process or a measure of yield for a given energy input. A prepared 50g sample of No. 16—No. 30 sieve size coal and eight 1in (25.4mm) diameter polished steel grinding balls are placed in a stationary bowl having a machined circular track.

  • Ceramic Ball Mill

    SAGMILLING.COM .:. Articles

    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 a closing mesh …