We need to decrease the grain size of the mill scale in industrial scale to about 80mesh. for screening, which one is better vibration screen or rotary screens? also, about crushing machine which one is better, hammer crusher or ball mill?
as i know the jaw crusher can't decrease the size of the mill scale to about 80mesh (175 micrometer)
You are basically right and jaw crushers are used for coarser grinding and this is true, for example, when crushing stones. However, scale is a material that is ground very easily, produces a lot of dust and when ground in a ball mill will immediately produce a very large amount of too fine powder.
If the task is to obtain mainly particles of 100-200 microns, then a ball mill will cope poorly with this task. In addition, a ball mill is much more expensive than a jaw crusher of the same capacity.
On the other hand, there are small but productive jaw crushers that are designed for crushing to sizes less than 1 mm. When crushing scale in such a crusher, the output of particles of 100-200 microns will be large, and the amount of dust will be much less than after a ball mill. Using a combination of a jaw crusher plus a vibrating screen, you will get a good output of the desired fraction with high productivity and low costs.
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