What is the relationship between fineness modulus and screen size?

At present, the general requirement for the fineness modulus of machine-made sand is 2.6-3.0, and the screen size is generally recommended to be 3.0mm or 3.5mm. If the stone powder content is large, you can consider using a 2.8mm screen; if it reaches about 2.3, you can consider a long screen, such as 1.7X5 or 1.9X5. The type of screen is generally selected as far as possible, which is very beneficial to the shape control; round hole screen or long screen is used as little as possible; it is also necessary to constantly monitor whether the screen is damaged and affects the fineness modulus.