Taylor standard screening system: The graduation of Taylor screening system is based on the 200-mesh screen hole size of 0.074mm, so the 0.5mm aperture screen is equivalent to 6.7 mesh.

Extended data:

Three explanations about the purpose:

1, Taylor's standard screening system: the grading of Taylor's screening system is based on the size of 200-mesh sieve hole of 0.074mm, multiplied by or divided by the n power (n = 1.4 14) of the square root of the main module, and the ratio of 200 to 200 is obtained.

2. The particle size of powder is called particle size. Because the particle shape is very complex, there are usually several representation methods, such as sieving particle size, settling particle size, equivalent volume particle size and equivalent surface area particle size. The sieve size is the size of the sieve holes through which particles can pass, and it is expressed by the number of sieve holes in the sieve with a width of 1 inch (25.4mm), so it is called "mesh number".

3. Given a set of domains D 1, D2, ..., Dn, these domains can be identical. A subset of the cartesian product D 1, D2, ..., Dn is called the relation over the domain D 1, D2, ..., Dn, and is expressed as R(D 1, D2, ..., Dn. Here r represents the name of the relationship, and n is the purpose or degree of the relationship.

References:

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