How is the density of coal measured?
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How is the density of coal measured? How are loose density, vibratory density, and compacted density measured respectively?
Here’s a makeshift method: take a bucket, fill it with coal using a shovel, level the surface, and then weigh it to determine its net weight. Get a bucket, use a shovel to fill it with coal, shake it a few times and then add more, repeating until it’s full. Level the top surface and weigh it to determine the net weight. Get a bucket, use a shovel to fill it with coal; put in a little and step on it, repeating until it’s full. Level the top surface and weigh it to determine the net weight. Then, dividing each net weight by the volume of the barrel gives the three bulk densities: lol
It’s indeed a very primitive method – simple and easy to use. There is no need to purchase advanced instruments. I wonder if the second floor is actually used in this way.
Going back upstairs, sorry I’ve never used it. Usually, knowing the particle size distribution and specific surface area is sufficient. Apart from warehousing and freight transportation, few people are likely to care about the bulk density under different states of looseness.
Take a clean and dry 50 ml volumetric flask, fill it with the sample, compress it until the mark is reached, then remove the sample to weigh it. Calculation: X = m/50. Where: X – density, g/cm3 ； m — sample mass, g.
The method above is one I found while working on the standards
What was said on the second floor was really great – vivid and practical!
The method on the second floor is good; take multiple measurements and use the average