It is a coal grade between Bituminous coal and Anthracite coal, and was once widely used as a fuel for steam locomotives ... Hard groove Index 44-57 Ash Fusibility Initial Deformation Temp. 1258-1380C Softening Temp. 1317-1418C Hemispherical Temp. 1400-1428C Fluid Temp 1424-1434C.
Đọc thêmHardgrove Index Tester from Changsha Kaiyuan Instruments Co., Ltd.. Search High Quality Hardgrove Index Tester Manufacturing and Exporting supplier on Alibaba.com.
Đọc thêmThe resulting Hardgrove Grindability Index (HGI) provides a measure of the energy required in a grinding process or a measure of yield for given energy input. A prepared 50g sample of No. 16—No. 30 sieve size coal and eight 1in (25.4mm) diameter polished steel grinding balls are placed in a stationary bowl having a machined circular track.
Đọc thêmDownloadable (with restrictions)! Coal's quality deterioration has been assessed by measuring its carbon and hydrogen contents, calorific value, hard groove grindability index, and reactivity by a differential-scanning calorimeter (DSC). The deterioration, was more prominent in sunny days with intermittent rain. Annually approximately 2500 kJ per kg decrease in calorific value of coal the was ...
Đọc thêmJul 01, 2000· 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 higher value of 95. This indicates that, due to weathering, coal become soft and fragile.
Đọc thêm9. 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. 10. …
Đọc thêmHard groove index for coal & minerals is an index therefore it has no unit the smaller the ore grinding mill equipment.Hard grove grindability index iron ore .Mill of mill by the free dictionary.To groove or flute the rim of a hard roller for impressing a design, mill grind with a mill; "mill grain" .
Đọc thêmThis is 'hard groove index testing machine', basically, hard groove index machine suitable for laboratory use for coal testing and coke testing. It measures relative ease of pulverisation of coals.
Đọc thêmThe Hardgrove grindability index is used empirically to estimate the capacity and power consumption of a pulverizer, given a specified product fineness. 1 Scope This International Standard specifies the method for determining the grindability index of hard coal using the Hardgrove machine.
Đọc thêmHardgrove Grindability Index analysis is the ASTM method of determining the hardness of coal when pulverized for steam generation or size reduction. Grindabilities typically range on coal from 35 – 110. Harder and less grindable coal rates a smaller HGI index number.
Đọc thêmHard Groove Index. AS per IS: - 4433-1967 The machine is suitable for laboratory us coal testing. It is compact with sturdy base, Plate support is provided with bowl, centring shaft, Gear & weight 29Kg.+-200 gm.(Cone & 8 balls are common) with gear box and gear assembly. 8 No steel ball 25mm and preset counter are provided. ... ISO 5074:1994 ...
Đọc thêmHard Groove Index Of Xrp Coal Mill Dec 10, 2019 nbsp 0183 32 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.
Đọc thêmThe Argus Russian Coal service is a weekly English-language report covering coal exports from Russia. The publication features a detailed overview of the Russian coal export market including price assessments, netbacks, coal production data, transportation, actual shipments broken down by port and producer, exclusive market news and much more.
Đọc thêmHardgrove index is one of the tests applied in coal preparation plants to determine the grindability of coal. This test method is a simple, fast and efficient method and is widely used because it is reproducible under laboratory conditions. High Hardgrove index values indicate that coal is easy to grind, while small Hardgrove index values ...
Đọc thêmHardgrove grindability index (HGI) measures the grindability of coal and is a qualitative measure of coal. It is referred to in mining, beneficiation and utilization of coal.
Đọc thêmSep 13, 2011· Standard index 1.5 lenses Standard index 1.5 lenses are the basic CR-39 lenses, come with anti-scratch hard coating, and are shatter-resistant, suitable for spherical power +/- …
Đọc thêmThe Hardgrove Grindability Index was developed as an empirical test to indicate how difficult it would be to grind a specific coal to the particle size necessary for effective combustion in a pulverized coal fired boiler. Its use has been extended to cover the preparation of pulverized coal for the cement, steel and chemical production industries.
Đọc thêmthat 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 ground fine enough for use as a pulverized fuel, and as such it reflects
Đọc thêmJun 09, 2013· d. Abrasion Index mg/kg 60 to 125 e. 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 furnace.
Đọc thêmWe have RB1 coal for sale. Coal is crushed and screened. Available is 100 000 MT - 150 000 MT/month. Prefer long-term supply contracts. We only offer FOB prices. ... Hard groove Grindability Index (HGI) 45 â€" 70 . Normal Topsize. 50mm. IDT. Min 1.150 degrees Celsius reducing atmosphere. Calcium Oxide in Ash (DB) 12.0% Max. Tell Us What ...
Đọc thêmMay 08, 2019· Abstract The correlations of the composition, structure, and properties of coal from Ukraine, Russia, Canada, Australia, the Czech Republic, Poland, and Indonesia with its Hardgrove grindability index are investigated. It is found that the Hardgrove grindability increases with increase in total carbon content Cdaf and aromatic carbon content Car, as well as the unsaturation δ of the …
Đọc thêmMar 17, 2013· Good evening. Thank you to all. Actually we are more worried about mill and PF pipe wear and coal quality. Our boiler is designed for Indian bituminious coal of CV-5000kcal/kg, VM-30%, ash- 25% but we are now receving coal with about 42% ash content, VM- 17 to 23%, and CV- 4250 Kcal/kg(ADB) low sulpher coal with HGI 47-50.
Đọc thêmApr 16, 2007· Can any one tell what is hard groove index (HGI) and what is its value for Iron ore, coking coal and lime stone 16th April 2007, 6:09 #2 Lyle Brown Guest
Đọc thêmThe Hardgrove Grindability Index (HGI) is a measure of coal's resistance to crushing. Grinding studies, and the resulting HGI, allow many different types of coal users to evaluate how coals will perform in their mills, allowing them to estimate grinding power requirements and throughput capacities. SGS is a world leader in coal and coke ...
Đọc thêmCoal Drying oven Equilibrium Chamber Humidity Chamber C, N & H Determination Apparatus Hot plate Micum Index Test Apparatus. Hard Groove Grindability Index (HGI) Seive Shaker. Riffle Sample Divider Ash, VM, Moisture Dish, Crucible Etc.
Đọc thêmOct 04, 2014· Grindability of a coal is generally represented in terms of Hard Groove Grindability Index (HGI); a coal of lower HGI need more energy to be ground. Samples of this study were taken from the ...
Đọc thêm1.1 This test method covers the determination of the hardgrove grindability index (HGI) of those petroleum cokes that contain no dedusting additive. The procedure for this test method is the same as in Test Method D409.Sections of this test method contain the significance and use of the HGI of petroleum coke, preliminary sample preparation procedures, and procedure and precision and bias data ...
Đọc thêmOct 07, 2019· The results are compared against a standard sample to provide the index and used to determine how much energy and expense will be needed to grind down a certain coal for a particular use (ASTM method D409-12; American Society for Testing and Materials, 2013, p. 397–411). The HGI is on a scale from 30 to 100.
Đọc thêmPhysical Properties Analysis Series I SDHG60a Hardgrove Grindability Index Tester (HGI) This instrument can be used to determine grindability of coal in the field of coal industry, power plants, metallurgical industry and scientific ISO 5074:1994 Hard coal - Determination of Hardgrove Grindability ASTM D 409-08 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method.
Đọc thêmMay 01, 2013· 9. 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. 10. FACTORS AFFECTINGTHE GRINDABILITY VALUES1.
Đọc thêmHard Groove Index (HGI) - bulk-online Forums. Dear all, Can any one tell what is hard groove index (HGI) and what is its value for Iron ore, coking coal and lime stone. More details » Get Price. Fire - Two Stone Fire Starting - Wildwood Survival.
Đọc thêmthe sulfur content of coal and the hard groove index are the problematic areas. On this basis it is suggested that the coal understudy can be used in cement industry after mixing it with imported coal of low sulfur content and high hard groove grindability index. 1 Center for Coal Technology, University of the Punjab, Lahore.
Đọc thêmOffer 1: Coking Coal ... Specific energy (Kcal/Kg) 7200. 7800. Specific energy (MJ/Kg) 30.2. 34.4. Crucible swell number. 4.0 Hard groove index. 48 ...
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