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WSR - Wet Sieve Residue Test

Used for ball clays. Gives indication of the presence of coarse silica or lignite. Visual observation of this residue is more valuable than the printed value. Analyzing this amount relative to carbon content and LOI can be enlightening also.

This is what labs use to measure particle size

To measure particle size in a slurry or powder you need sieves. This is the most popular type used in labs. They are made from brass by a company named Tyler. The range of screen sizes for testing particle size is very wide (obvious here: the top screen has an opening of 56 mm, the bottom one 0.1 mm - the wires are almost too small to see). You can buy these on ebay for a lot less than new ones, search for "tyler sieve". The finer sieves (especially 200) are fragile and easily ripped. It is good to have a 50, 100 and 150.

Variables

Describe residue

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By Tony Hansen

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