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Leading the world in ore hardness testing. The SMC Test® is the most widely-used comminution test in the world for AG & SAG Mills, HPGRs and Crushers. It is used to design comminution plants, optimize circuit performance, forecast throughput, reduce CO 2 emissions and cut energy costs.
Get PriceThe Mohs scale of mineral hardness (/ m oʊ z /) is a qualitative ordinal scale characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material. Created in 1812 by German geologist and mineralogist Friedrich Mohs, it is one of several definitions of hardness in materials science, some of which are more quantitative.
Get PriceAt least 2 kg of passing 3⁄4" ore for the SPI mill feed (with no more than 80% passing 1⁄2"). 10 kg is required for the Crusher Index (Ci) determination. * Dobby G, Kosick G, and Starkey J, "Application of the Minnovex SAG Power Index Test at Five Canadian SAG Plants", in International Autogenous and Semiautogenous Grinding Technology 1996, Mular A.L., Barratt D.J., and Knight D.A
Get PriceThe work index covering grinding in tumbling mills of coarse sizes is labelled M. ia. The work index covering grinding of fine particles is labelled M. ib (Morrell, 2008). M. ia. values are provided as a standard output from a SMC Test ® (Morrell, 2004. a) whilst M. ib. values can be determined using the data generated by a conventional Bond
Get PriceThe 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
Get Priceconsists of squeezing pieces of rock diametrically between two hardened steel cones. The test set-up is shown in Figure 1. For these tests, rock pieces must have a length at least 1.4 times their diameter (Figure 2a). The point load index, Id, is equal to where P is the load at rupture and D is the core diameter. Rock specimens break since tensile
Get Priceindex can be determined in the field on rock core retrieved from borings and the core does not require any specimen preparation. Knowing the rock type and rock material hardness, it is possible for the experienced engineer or engineering geologist to make fairly accurate estimates on rock
Get Pricerock hardness crusher work index; rock hardness crusher work index. mining ore crushing hardness - im-obstbaumgarten.ch. Rock Crushers for Commercial Gold Mining Operations . Jan 23, 2017 Crushers release gold and other metals from ores to allow for further in the mining sector where rocks containing the ore are crushed before the This crusher
Get Priceindex can be determined in the field on rock core retrieved from borings and the core does not require any specimen preparation. Knowing the rock type and rock material hardness, it is possible for the experienced engineer or engineering geologist to make fairly accurate estimates on rock
Get PriceTable 4–13 Fracture type 4–21 Table 4–14 Fracturing density description chart 4–21 Table 4–15 Joint set spacing categories 4–22 Table 4–16 Aperture category 4–23 Table 4–17 Joint infilling 4–24 Table 4–18 Joint persistence categories 4–25 Table 4–19 Types of joint ends 4–25 Table 4–20 Descriptors for weathering condition of joint face rock 4–27
Get Pricegranite, feldspar and quartz were tested for hardness, abrasion, compressive strength and modulus of elasticity and the bond work index of these samples were estimated. The value of Bond work index of the above samples has shown a variation from 10.8 kwh ton-1 for bauxite (high abrasion value and low compressive strength) to 20.4 kwh ton- 1
Get Priceconsists of squeezing pieces of rock diametrically between two hardened steel cones. The test set-up is shown in Figure 1. For these tests, rock pieces must have a length at least 1.4 times their diameter (Figure 2a). The point load index, Id, is equal to where P is the load at rupture and D is the core diameter. Rock specimens break since tensile
Get PriceThis Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the other table.
Get PriceThe work index covering grinding in tumbling mills of coarse sizes is labelled M. ia. The work index covering grinding of fine particles is labelled M. ib (Morrell, 2008). M. ia. values are provided as a standard output from a SMC Test ® (Morrell, 2004. a) whilst M. ib. values can be determined using the data generated by a conventional Bond
Get PriceRock Type, Size, Shape, Hardness, Toughness WEAR MATERIAL Chemical Composition - 18%, 22% etc. BOND WORK INDEX (KWH/T) LOS ANGELES VALUE UCS (MPa) The hardness of a material is a major consideration in the selection of the type of crusher to use. Hardness is a factor in the amount of wear and tear crushers and screens experience.
Get PriceThe 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
Get Pricework index. The work index, w i, represents the kilowatt hours per tonne required to reduce the material from theoretically infinite feed size to 80 percent passing 100μm [4]. 2. Design Analysis and Calculations 2.1 Roll Crusher Geometry It is necessary to estimate the maximum size of
Get PriceRock Type, Size, Shape, Hardness, Toughness WEAR MATERIAL Chemical Composition - 18%, 22% etc. BOND WORK INDEX (KWH/T) LOS ANGELES VALUE UCS (MPa) The hardness of a material is a major consideration in the selection of the type of crusher to use. Hardness is a factor in the amount of wear and tear crushers and screens experience.
Get Pricecrusher tackles volcanic rock in South Africa - Aggregates. The QH331 crusher has been supplied by Mobile Crushers and Screens which is a hard volcanic rock with a high work index that is very difficult to crush. However this hardness, and
Get PriceOnly relatively small quantities of sample are required and can be re-used to conduct Bond ball work index tests. The results from conducting the SMC Test® are used to determine the so-called drop-weight index (DWi) which is a measure of the strength of the rock
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