I have a question regarding the screening mesh used for sorting roasted ore particle sizes
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Here, we produce acid from zinc concentrate; our main product is roasted ore, while sulfuric acid is the by-product. The system is now equipped with a ball mill, which imposes requirements on the particle size of the roasted ore. A particle size screening test is required. But a sieve with a rating of -160 is required. There are plus and minus signs in front of the mesh size; this information can be found on Baidu. However, for screens with a negative mesh size, it’s almost impossible to find information regarding the corresponding pore size, and it’s unclear how to communicate this to the seller when ordering custom screens. I would like to ask if anyone knows the pore size of negative-number sieve meshes? For example, pore sizes of -160 mesh and -200 mesh
The negative sign indicates the number of mesh to be omitted; it is generally not used alone. For example, 100 mesh ∼ 300 mesh denotes the particle size range – particles of this size can pass through a 100-mesh sieve but not through one with 300 mesh.
Thank you, so that means I just need to buy a sieve with a certain number of mesh points, and not a sieve with a negative number of mesh points – just one with a positive number of mesh points. That’s what it means, right?
Do the calculation; the count refers to the number of openings per unit area