16-06-2015· 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
Get QuoteAs Alex told you: The crushing work index you calculated appears mostly correct. The only correction factor that might affect the calculation is to correct for the efficiency of the motor -- the work index is based on motor output (pinion) power, whereas the measurement of motor power is usually based on motor input power.
Get QuoteBond crushing (impact) work index In general, the impact or crushing work indices (CWi) calculated from test work carried out on machines conforming to Bond’s Comparison between bond crushing energy and fracture energy of
Get QuoteCrushing mill work index is used in the SAGMILLING.COM Bond/Barratt specific energy consumption model. The work index is used to calculate the energy requirement to break rocks in the coarse size range, from >100 mm down to about 10 mm 20 mm.
Get Quote29-04-2013· Historically mills were powered by hand (mortar and pestle), working animal ( horse mill), wind 1 Grinding laws; 2 Grinding machines E is the energy ( kilowatt-hours per metric or short ton); W is the work index measured in a within it; material to be crushed is shoved underneath the wheels using attached plow blades. »More detailed
Get Quote2.4.3.2 Impact crushability. Bond impact crushability work index (CWi) ( Bond, 1963) results reported for iron ores vary from hard iron ore (17.7 kWh/t) to medium hardness iron ore (11.3 kWh/t) and friable iron ore (6.3 kWh/t) ( Table 2.11; Clout et al., 2007 ).
Get QuoteThe Bond Crushing Work Index (CWI) describes the competency of the ore at larger particle sizes. It is used for the calculation of the actual crusher power requirements. Pendulum mounted hammers with scale. -Test: At least 10 specimens preferably 20 specimens to be tested.
Get QuoteMechanical Operations The work index in Bond's law for crushing of solids has the following dimensions KWh/ton KW/ton KWh.m1/2/ton No units (dimensionless) KWh/ton
Get QuoteThe 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.m1/2/ton. Share. Tweet. WhatsApp. Share. Pin. Mcq Added by: admin. Mechanical Operations Mechanical Operations. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG.
Get QuoteMCQs: The work index in Bond’s law for crushing of solids has the following dimensions_____? Chemical Engineering Mcqs Mechanical Operations Mcqs for Chemical
Get QuoteThe 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
Get QuoteBond Impact Crushing Work Index Procedure and Table of . 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 openside settings ( jaw crushers and gyratory crushers) or closedside settings (cone crushers) for a given product size
Get QuoteThe 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
Get Quote14-05-2010· 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 as the gross energy requirement in kilowatt-hours per ton of feed needed to reduce a very large feed to such a
Get QuoteCorpus ID: 135952425. An experimental research on the comminution law and work index concepts in jaw crushers @inproceedings{Cardu1993AnER, title={An experimental research on the comminution law and work index concepts in jaw crushers}, author={M. Cardu and C. Clerici and A. Morandini and R. Mancini and E. Occella}, year={1993} }
Get Quote01-01-2016· Bond’s crushing work index of gypsum. 3.4. A sample of granite passing a 7.5 cm square opening screen was suspended in a Bond’s pendulum test. The length of the pendulum was 413 mm and the mass of hammers is 13.6 kg each. The sample was completely crushed when the initial position of the pendulums made an angle of 30° with the vertical.
Get Quote1c. Students know how to apply the law F=ma to solve one-dimensional motion problems that involve constant forces (Newton’s second law). H.S. Chemistry . 4c. Students know how to apply the gas laws to relations between the pressure, temperature, and volume of any amount of
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