HEGF - Hegman Fineness Test

LSTM-17 test method.
This is quoted on talc and kaolin data sheets, for example.

Here is a good description of the method from gardco.com:
In its simplest conception, a Fineness of Grind Gage may be considered essentially a continuous variable screen. It can be readily seen that if a material such as fine silica were distributed uniformly in a single particle thickness in the gage path, these particles would protrude above the sides of the path starting at whatever point that their physical size exceeded the depth of the path.

If a straight edge scraper was brought to bear on the sides of the path in conjunction with the deepest part, and then moved slowly down the path to the shallow end, it would contact the protruding particles and on continued movement, screen or push these particles from the path.

Variables

VAL - Value (V)

Related Information

Videos

Links

URLs	http://www.gardco.com/pages/dispersion/finessofgrind_gauges.html Guardco Hegman Fineness Page
Tests	Sieve Analysis Dry A measure of particle size distribution by vibrating a powdered sample through a series of successively finer sieves
Tests	Sieve Analysis Wet A measure of particle size distribution by washing a powdered or slaked sample through a series of successively finer sieves
Tests	Sieve Analysis 35-325 Wet A measure of particle size distribution by washing a powdered or slaked sample through a series of successively finer sieves
Tests	Wet Sieve Residue
Typecodes	Particle Tests Tests conducted to determine particle populations, sizes, shapes, densities, surface areas, etc.

By Tony Hansen
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