which crusher should used for hardgrove index

IS 4433 (1979): Method for Determination of Hardgrove ...

used between the grinding bowl and ring to align the dimension with that given in DP 5074 ' Hard coal determination Grindability Index ' issued by the of Hardgrove International Organization tar Standardization. 0.4 The grindability of coal is a measure of the ease with which it can be


Hardgrove index of coke for lime kiln - beckers-muehle.de

The affect of hardgroves index for hard coals on grinding costs many cement plants burning these fuels are converting to solid fuels such as coal and petrolm coke as coke typically will have the lowest hardgrove grindability index HGI which makes it the most difficult to grind as pared with the other fuels DevourX mill . Rotary Kilns


bond index hardgrove grindability index tests for

Bond Grindability Index For Fly Ash. grindability of limestone. Alternative Approaches for Determination of Bond Work Index on the HGI values, grinding of fine –grain samples involved. approach, is Bond's grindability test and the second one is Hardgrove index, which generally used for coal.In recent, the brittleness test/friability value of bauxite, limestone, barite, These studies were ...


Mineral Sizers,Twin Shaft Mineral Sizers, Double Roll ...

5.The material HGI (hardgrove grindability index) range: 6. Material particle distribution percentage? 7.Max. grain size of the feeding material: _____mm 8. What is the grain size of the finished product after crushing? 9.What equipment is used to feed the material into the sizer? 10.What equipment is used to discharge the material from the ...


hargrove grindability index for rocks

hardgrove grindability index for rocks in Australia - Crusher ... ACARP Australia are of this type. This type of mill handles high moisture content … Hower J C, Hardgrove grindability Index and petrology used as an enhanced ...


Handbook of Crushing

Hardgrove Index (HGI) — Grindability of a coal expressed as an index showing the relative hardness of that coal compared with a standard coal of 100 grindability. Height of Drop — Vertical, free fall distance from the lip of the feeding device to the inlet opening of an impactor or hammermill crusher. Normally applies to reversible machines.


crushing energy consumption coal kick bond index

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.


Laboratory Sample Pulverizers - 911Metallurgist

Moisture content of pulverized lignite should be specified if comparison is to be made with bituminous coal. Similarly, the Hardgrove grindability index varies with the moisture content of the lignite sample tested. This variation has been studied and efforts to correlate Hardgrove index to pulverizer operation have been made.


coal hardgrove index plate mill - jaw crusher technology ...

5E—HA60x50 Hardgrove Grindabiiity Index Tester SE-PMIII Portable Stockpile Inventory Instrument ... 5E-HCA400x260 Humid Coal Hammer Crusher 5E-DCA250x 150 Double Roller Crusher 51. 52 ... plant sub—system operating and maintenance personnel. .....


Bond Impact Crushing Work Index -Procedure and Table of ...

Jun 16, 2015· 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 crushers and gyratory crushers) or closed-side settings (cone crushers) for a given product size.P80 = 25400 x Oss x (0.04Wi + 0.40)


Hardgrove grindability index (HGI) - SlideShare

May 01, 2013· May 01, 2013· The Hard grove method ismostly used to determine the grindability ofcoal, but also in determining grindability ofother raw materials. Bond's method is used toevaluate the rock grindability. 4. HARDGROVEGRINDABILITY INDEX (HGI)• The Hardgrove Grindability index is designed todetermine the ease with which coal can bepulverized.•


Crushing work index Calculation - Crushing, Screening ...

The Bond crushing work index test (sometimes called the "impact work index" test) is noisy, and the difference you observed is perfectly reasonable. The paper by Angove & Dunne (1997) reports a standard deviation in crushing work index tests across laboratories as 4.5.


hardgrove index of coke for lime kiln

Hardgrove index (grinding) Bulk Density, Kg/m3 Lump Size, mm Fixed Carbon,% 6 to 12 0.2 to 2 5 to 14 2 to 8 7500 to 8000 35 to 70 ...BUILD-UP IN THE TRANSPORT PIPES TO THE KILN .We are having a lot of coke build-up in the transport pipes to the burner both in the clinker kilns and in the lime kilns.


CORRELATION BETWEEN BOND WORK INDEX AND …

Hardgrove index and brittleness test can be carried out easily on only those ores or rocks or materials, which are soft, friable and brittle [1-3]. Indices with which the crushing resistance or the grindability in a wide meaning is expressed include the Rittinger number, crushing resistance, Hardgrove index and Bond work index.


Bond Impact Crushing Work Index Testing Machine - Pendulum ...

The Pendulum Tester / Bond Impact Crushing Work Index Tester. Working principle Crushing by impact. 76 mm maximum feed size. Test repetition: At least 10, preferably 20 test runs. Adjustable crushing angle Repeatable crushing results Safe two-hand operating buttons The Bond Crushing Work Index (CWI) describes the competency of the ore at larger particle sizes. It is used for the calculation …


Grindability - an overview | ScienceDirect Topics

Grindability index is a measure of the ease of grinding of a given feed. Utility industries use the Hardgrove grindability index (HGI) to express this parameter. In the direct cofired system, the existing mills designed for coal are used for grinding the cofired biomass. So for a given mill, given rotation, and energy input, it is necessary to ...


Standard Test Method for Grindability of Coal by the ...

Use of the working sieve for HGIs should be discontinued if HGI difference between the sieves is greater than 1 HGI unit. 4.6 Crusher—A laboratory plate mill capable of reducing 4.75-mm (No. 4) sieve size coal particles with the production of a minimum of minus 600-µm (minus No. 30) sieve size material (Note 3). The crusher plates shall be ...


Hardgrove Grindability Index - Wikipedia

Hardgrove Grindability Index (short HGI) is a measure for the grindability of coal. Grindability is an index, therefore it has no unit. The smaller the HGI, the harder is coal texture and less grindable is the coal. Grindability is an important factor for the design a coal mill. As grindability depends on many unknown factors, HGI is determined ...


bond index hardgrove grindability index tests for

Bond Work Index (BWI) & Hardgrove Grindability Index (HGI) tests for biomass & coal. BWI can predict the potential for mill choking of biomass in a tube and ball mill. HGI is a poor method of predicting grindability of biomass in vertical spindle mills. Pellets should be composed of pre-densified particles close to the target size.