bonds crushing law and work index

  • Bond Impact Crushing Work Index -Procedure and Table of

    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. A crude test

  • Bond Work Index an overview ScienceDirect Topics

    The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and

  • Fred Chester Bond Wikipedia

    In the 1930s through early 1950s, Bond developed a new theory of comminution that introduced an index, called the 'Bond Work Index', which relates power consumption in crushing and grinding to the feed and product size distribution. His theory and index were introduced in a widely cited 1952 journal article. Bond called his theory the "third theory of comminution", counting those of Peter von Rittingerand Friedrich Kick as the first and second. This term and the terminology of "laws of comminution", as in "Rittinger's law", "

  • bonds crushing law and work index shibang-china

    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 s law for crushing mills

    * Bond F. C., “Crushing Tests by Pressure and Impact”, Trans AIME, Vol 169, 1947, pp 58-66. Bond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements when sizing ball mills*. Various correction factors may have to be applied.

  • Chemical Engineering Stop: Bond’s law

    14/05/2010· Bond postulated that work required to form particles of size Dp from very large feed is proportional to the square root of the surface-to-volume ratio of the product, Sp/Vp. By relation Sp/Vp = 6/ɸsDp, from which it follows that . P/ ṁ = Kb/(Dp)^0.5. Where Kb is a constant that depends on the type of machine and on the material being crushed. To use this equation, a work index Wi is defined

  • bonds crushing law and work inde fdp

    Bonds Crushing Law And Work Inde Fdp. Bonds Crushing Law And Work Inde Fdp. Processing ability: 0.26–30 m³ Diameter: 240–850 mm Sand making machine is high-efficiency rock crushing equipment with domestic and international leading level; the machine is developed by introducing the crushing theory and technology from Barmac Company of America and combining the actual

  • Fred Chester Bond Wikipedia

    Bond Work Index. In the 1930s through early 1950s, Bond developed a new theory of comminution that introduced an index, called the 'Bond Work Index', which relates power consumption in crushing and grinding to the feed and product size distribution. His theory and index were introduced in a widely cited 1952 journal article. Bond called his theory the "third theory of comminution", counting

  • The work index in Bond's law for crushing of solids has

    The work index in Bond's law for crushing of solids has the following dimensions a) No units (dimensionless) b) KWh/ton c) KW/ton d) KWh.m 1/2 /ton

  • CPE: Lesson 15. Empirical laws of Size Reduction

    The Bond Work Index is material specific and is obtained from laboratory crushing tests on the feed material. Hard and brittle materials have a work index in the range 4 × 10 4 − 8 × 10 4 J/kg. Bond’s law holds reasonably well for a variety of materials undergoing coarse, medium and fine size reduction. (Eq. 14.3a) can also be reduced to

  • CORRELATION BETWEEN BOND WORK INDEX AND

    The Bond work index is regarded as one of the crushing resistance; it can therefore be presumed that the Bond work index is correlated to the mechanical properties of materials [4]. Literature review on impact crusher performance in relation to machine configuration and operational conditions, by experimental work and mathematical modeling is given by studied rock failure under tensile stress

  • QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE

    Abstract: The 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, time- consuming and requires trained operating personnel and therefore is subjected to errors. A

  • FM 306: SIZE REDUCTION AND SIEVING

    Bonds law is often written in terms of the work index (Wi) as, Where the work index is defined as the energy required per unit mass in kWh/ton to reduce an infinitely large particles to D80 = 100 μm. In the above equation, unit of D80 is in mm, of ‘W’ is kWh and of ‘m’ is in ton. Work index for common materials is Material Wi (kWh/ton)

  • Bond Tests SGS

    * Bond F. C., “Crushing & Grinding Calculations”, Reprint from British Chemical Engineering, Allis-Chalmers Publication 07R9235B. Bond Low Energy Impact Test. The test determines the Bond Impact Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the required open-side settings (jaw

  • Size Reduction and Energy Requirement ScienceDirect

    01/01/2016· The impact crushing strength of rocks so determined is used to calculate the Bond crushing work index using the expression applying Newton’s law of conservation of energy, the coefficient of restitution will be (3.18) ε = − v B 1 − v S 1 v S o. The energy for crushing, E, is the difference between the energy of the input pendulum and the energy of the rebound pendulum and is

  • Chemical Engineering Stop: Bond’s law

    14/05/2010· Bond postulated that work required to form particles of size Dp from very large feed is proportional to the square root of the surface-to-volume ratio of the product, Sp/Vp. By relation Sp/Vp = 6/ɸsDp, from which it follows that . P/ ṁ = Kb/(Dp)^0.5. Where Kb is a constant that depends on the type of machine and on the material being crushed. To use this equation, a work index Wi is defined

  • Rittinger's, Kick's and Bond's Crushing Laws YouTube

    03/02/2018· Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

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