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Bond's work index one of the most acceptable approach to calculate the grindability index.

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16y ago

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Hard grove index?

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?


What is the unit of Hardgrove Grindability Index?

It has no units because we are determining the degree of pulverized coal.


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Is there any relation between HGI and grade of coal?

Yes, there is a relation between Hardgrove Grindability Index (HGI) and the grade of coal. Essentially, the HGI is a measure of the grindability of a coal, indicating how easily it can be pulverized. Lower-grade coals typically have lower HGIs, meaning they are harder to grind compared to higher-grade coals.


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What is Bond's work Index E1?

{| |- | Bond's work index E1 is the energy required for grinding per unit mass for sand |} {| |- | Bond's work index E1 is the energy required for grinding per unit mass for sand |} {| |- | Bond's work index E1 is the energy required for grinding per unit mass for sand |} {| |- | Bond's work index E1 is the energy required for grinding per unit mass for sand |}


What is the value of grindability specific gravity and temperature coefficient of refractive index of crown and flint glasses?

The specific gravity of crown glass is around 2.55, while for flint glass, it is approximately 6.12. The temperature coefficient of refractive index for crown glass is usually around 86 x 10^-6 per degree Celsius, and for flint glass, it is about 33 x 10^-6 per degree Celsius. Grindability value can vary based on the specific composition of the glass and the method used for measurement.


What is the work bond index of clinker?

The work bond index of clinker refers to the grindability of clinker, which is a measure of the energy required to grind it to a specified fineness. It is determined through laboratory testing using a specific procedure and can provide insight into the efficiency of grinding processes in cement production. A lower work bond index indicates easier grinding and lower energy consumption.


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