The Bond work index ( Bond, 1960) is based on Bond's law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger's law. Accordingly, the energy consumed in reducing the particle size from x F to …

Engineering; Chemical Engineering; Chemical Engineering questions and answers; Bond crushing law and work index Bond has suggested a law intermediate between Rittinger's and Kick's laws, by putting p= -3/2 in equation 2.1.

•It is desired to crush 10 ton/hr of iron ore hematite. The size of the feed is such that 80% passes a 72.6 mm screen, and 80% of product a 3.175mm screen. Calculate the gross power requirement for wet grinding and dry grinding. Work index of Hematite is 12.68 [Ans 17.96kW]

The Bond low-energy impact crushing work index (more informally, the Bond crushing work index) is not as common as the Bond ball mill work index, and it is a notoriously noisy test.. The test is a 'per-specimen' test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus.

The work index in Bond's law for crushing of solids has the following dimensions. A. No units (dimensionless) Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately ? D.

Handbook of Crushing Glossary of Terms Angle of Nip — The angle formed between the moving surface of a crusher roll or jaw plate and the stationary plate surface at which point the material will be pinched. Angle varies with machine size and material lump size. Bond Work Index (BWI) — …

where W is the work input (kWh/t); Wi is the work index (kWh/t) which expresses the resistance of the material to crushing and grinding; and F80 and P80 are the 80% passing size of the feed and the product ( m), respectively. Bond developed a standard laboratory test for the determination of the work index for ball and rod mills in

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.

bonds crushing law and work index. 20131254 epeat steps 2 and 3 heory and Analysis The minimum energy required for crushing of the sample is smaller than it onds law is often written in terms of the work index …

terms. The index is defined as the energy required to crush from infinite size down to 100 µm, hence the 10 inside the brackets. Bond's Work Index values, in kWh per short ton: i.e. 2000 lbs or 907 kg, roughly follow the Moh's scale of hardness, see Table 11.1. In Summary, Kick's law …

Rittinger's theory and law of the energy expended in crushing of rock is that the work of crushing is proportional to the reduction in diameter; or, as I have more fully expressed it: "The work done in crushing is proportional to the surface exposed by the operation; or, better expressed for this purpose, the work done on a given mass of rock is proportional to the reciprocal of …

bond crushing work index - Crushers, Raymond Mill ... bonds crushing law and work index. This page is about bonds crushing law and work index, click here to get more infomation about bonds crushing law and work index.

The work index Wi can be determined from plant operations and from laboratory ball mill grindability, rod mill grindability, and impact crushing tests. The laboratory test results are used to check the efficiency of commercial operations and …

crushing experiments show that the capacity of a jaw crusher is dependent ….. they are empirically based laws that only fit experimental data over a limited range of ….. free to pass through the crushing chamber at any time, the breakage process … the most utilized for jaw crushers, compressive strength and the work index. » More detailed.

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.

crushing laws and work index free pdf - zorpot-simp.pl. crushing laws and work index free pdf - BINQ Mining · crushing experiments show that the capacity of a jaw crusher is dependent ….. they are empirically based laws that only fit experimental data over a limited range of ….. free to pass through the crushing chamber at any time, the breakage process … the most utilized for jaw ...