YES, there is a relation between HGI and coal quality. HGI is the parameter to indicate the hardness or grindability of the coal when it is used in pulverized coal for boiler
Since mercury can be either a 1+ ion called mercury(I), or a 2+ ion called mercury(II), there are two possibilities.Formulaspotassium chloride is KClpotassium iodide is KImercury(I) chloride is HgClmercury(I) iodide is HgImercury(II) chloride is HgCl2mercury(II) iodide is HgCl2Equation with Mercury(I)KCl + HgI --> HgCl + KIEquation with Mercury(II)2KCl + HgI2 --> HgCl2 + 2KI
barium sulfate, BaSO4 The reaction is CuSO4(aq) + Ba(NO3)2(aq) --> Cu(NO3)2(aq) + BaSO4(s)
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Coal sample of specific size is put into griding vessel. HGI machine is rotated for 60 times (or so) and the coal is taken out. Agian, coal is checked for the sieve passing ratio and its HGI is calculated against standard curve.
What is the HGI(Hard Grove Index)?from britannicameasurement of coal grindability...in a laboratory mill of standard design. The percent by weight of the coal that passes through a 200-mesh sieve (a screen with openings of 74 micrometres, or 0.003 inch) is used to calculate the Hardgrove grindability index (HGI). The index is used as a guideline for sizing the grinding equipment in a coal-preparation plant.Can you tell us the HGI for Indian coal?
The Hardgrove Grindability Index was developed in the 1930s from experimental work by R. Hardgrove to determine the relative difficulty of reducing various coals to a particle size required for efficient combustion in pulverized coal boiler furnaces. The HGI is now commonly applied to specifications for coal to be used in the iron making, cement and chemical processes. There are several different "standard" methods for the determination of HGI (e.g. - AS1038 Part 20:2002, and ASTM D409-2006), which can lead to significantly different results. Further, HGI is an empirical measure and not a physical proprty of coal; as such the results of any standard test have relatively low repeatability for a given coal sample. In general, the higher the HGI value, the more readily a coal can be reduced to smaller particle sizes.
2KI + HgCl₂ -----> 2KCl + HgI₂
HgI is not a chemical reaction, it is the empirical formula for the compound Mercury (I) iodide, Hg2I2
Mercury (II) Iodide
hgi
hgi
Finding the properties of 8x51 is easy. The properties of 8x51 is 408.
g language is a rytheme so what you have to do is to put a g in to the second letter of the word for example hi=hgi you would pronounce it h(ee)g(iy)
Good Speech Language Pathologists approach treatments with an innovative spirit; they have to be a people person; able to adapt to difficult situations; always considerate of the patient and patient's family; certified in Modified Barium Swallowing Studies (MBSS); VitalStem certification. Answer provided by HGI Healthcare