hard groove index of xrp coal mill

hardgrove grinding mill coal

Hardgrove grindability index (HGI) - SlideShare 1 May 2013 ... Close the mouth of the ball mill, and set to rotate for exactly60 revolutions. ...CALCULATIONSThe hard groove grind ability index of coal is ...Characteristics of Mae Moh lignite: Hardgrove grindability index and ... moisture content brown coal..

Chat Online

Business Query | McNally Sayaji

If ROM Coal, approx. percentage of Shale and Sandstone Bond Index (kWh/t) or Hard groove Index Feed analysis or Average feed size, say 80% passing size (mm) Max. Lump size (max. edge/diagonal length) present in feed (mm) Desired product size (mm)

Chat Online

Combustion.ppt | Combustion | Coal

There are four operations going concurrently within the mill body, coal drying, transport, classification and grinding. For coal pulverizers the capacity of a mill is normally specified as tonnes output when grinding coal with a HGI of 50, with a particle size of 70% less than 75 micron and 1 % greater than 300 micron and with a moisture in coal of less than 10%.

Chat Online

How to operate 5E-HA60×50 Hardgrove Grindability Index …

 · 5E-HA60×50 Hardgrove Grindability Index Tester is designed to measure the grindability of coal, which is widely applied in coal industry, power plant ,metallurgy and chemical industry.

Chat Online

Jaw Crusher Suppliers | Bomb Calorimeter Manufacturers

Calculation - The hard groove grindobility index of coal is calculated using the following formula. HGI = 13 + 6.93 W. W = weight of the test sample passing through 73 sieve after grinding Jaw Crusher

Chat Online

Hardgrove Grindability Index

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.

Chat Online

Coal Mills in thermal power plant | Mill (Grinding) | …

MILL CAPACITY THE CAPACITY OF MILL DEPENDS ON THE HARD GROOVE GRINDABILITY INDEX, THE MOISTURE CONTENT OF COAL & THE PULVERISED FUEL FINENESS OUTPUT REQUIRED. OPERATING PARAMETERS MAINTAIN Mill Outlet Temperature BETWEEN 70-80C.

Chat Online

ABC OF THERMAL POWER PLANT: MILLS IN A THERMAL …

Hard Groove Index 45 to 110 EFFECTS OF COAL ELEMENT ON MILL CHOICE AND SIZING. MOISTURE - More hot air is required to dry the coal particles . VOLATILE MATTERS- Determine temperature of Mill outlet and coating on rollers etc Calorific Value ...

Chat Online

hargrove index of coal

CALCULATIONSThe hard groove grind ability index of coal is thancalculated using the following formula.HGI = 13 + 6.93 wWhere,w = weight of the test sample passingthrough 75μ sieve and retained on 300 μsieve after grinding in the HGImachine.

Chat Online

Pulverizer Plant O&M Aspects

Nomenclature-Bowl Mills 583 XRS / 803 XRP Bowl mills 58,80 stands for bowl diameter in inches If the number is even then its shallow bowl mill. If the number is odd then its deep bowl mill 3 - number of rollers three nos. X - frequency of power supply 50 cycles.X - frequency of power supply 50 cycles.

Chat Online

Coal-quality deterioration in a coal stack of a power …

 · 3.4. Hard groove grindability index (HGI) The HGI determined for fresh coal received at the stack yard was 60, whereas after getting exposed to the atmosphere in stackyard for 6 months, index was found to be 85. The sample of February 1998 showed again a

Chat Online