Jan 17, 2015· Ferrochrome reverts crushing work index and abrasion index? I'm looking for the crushing work index (kWh/t) and abrasion index of standard ferrochrome reverts. Thank you. Babak Houdeh ... YGP Index of Coal. By yogendra singh in forum General Aspects Replies: 3 Last Post: 10th September 2009, 22:54.
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Rasive Index Ygp Index Coal subject abrasive index of coal ... correlation between bond work index, correlation between bond work index and mechanical properties of .
COAL BLENDING NEED ? The indigenous coal supply to the power sector will be mostly from lower grade coals having high ash content. The power sector shall have to depend on significant quantity of imported coal in the future as the demand cannot be met from indigenous supply. For blending Homogeneity of Coal Property is always preferred but
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Abrasion testing. Abrasion is the property of the coal which describes its propensity and ability to wear away machinery and undergo autonomous grinding. While carbonaceous matter in coal is relatively soft, quartz and other mineral constituents in coal are quite abrasive. This is tested in a calibrated mill, containing four blades of known mass.
Hardgrove Grindability Index (short HGI) is a measure for the grindability of coal. Grindability is an index, therefore it has no unit. Grindability is an index, therefore it has no unit. The smaller the HGI, the harder is coal texture and less grindable is the coal.
abrasion index (AI) which has been used to assess the abrasive nature of the thermal coal was established first by Yancey, Geer and Price (YGP) in 1951 using YGP test rig.
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ygp index of coal definition BINQ Mining. Report of The Group for Studying Range of 19 Apr 2011, 2 Impact of Blended coal Firing on Boiler Performance 2 3 Blending, YGP Index is a measure of the coal's abrasive nature The YGP, observed to be more than the prediction made by conventional methods of calculation, »More detailed. More Info
Abrasion Index Abrasion index is an index that shows the abrasive properties abrasion of coal on the part of the equipment used to grind Read more abrasive index .
Mar 17, 2013· Re: Hardgrove Grindability Index 09/23/2010 6:02 AM Indeed, ball and race type mills are not designed for products with a HGI much lower than 50 (some suppliers decline responsibility if such coal is grinded in their mills): since mechanical pressure is applied with the balls, if the product is too hard to grind, there won't be enough product ...
Hardgrove Grindability Index (short HGI) is a measure for the grindability of coal. Grindability is an index, therefore it has no unit. Grindability is an index, therefore it has no unit. The smaller the HGI, the harder is coal texture and less grindable is the coal.
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The Abrasion Index was calculated according to British Standard BS :1998 using a Yancey, Geer and Price (YGP) test rig. The coal used for the tests was a washed Rossington coal with a dry ash content of wt%.
Jun 26, 2015· YGP Index YGP Index is a measure of the coal's abrasive nature. The YGP index is greatly influ enced by the contaminants in the coal like shale content, inclusion of dirt bands, mixing up of over burden/under burden material while mining the coal etc. Good mining and re claim practices can minimize abnormal increase in the YGP index of the as fired coal in the power station.
Abrasion index is an index that shows the abrasive properties (abrasion) of coal on the part of the equipment used to grind the coal before being used as fuel in certain combustion systems. The higher the index the abrasive coal the higher the maintenance costs of the coal grinding equipment.
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 kwh ton1 for bauxite (high abrasion value and low compressive strength) to kwh ton 1 for granite (low abrasion value and high modulus of elasticity). The
Geer and Price). • The abrasion can also be expressed as a YGP index (Yancey. • The relation between YGP index and AI index is as follows: YGP = 4 x AI Asec Basic Coal Information . • The abrasion index is investigated in the laboratory according to method BS 1016. part 19 (British Standard) and is measured in mg/kg.
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The Yancey, Geer and Price (YGP) abrasion index has been used for many years to assess the abrasive nature of a coal. The index is clearly related to the mineral matter in the coal, but a direct ...