Rotex is a world leader in manufacturing screening machines for fine screening applications such as limestone for example.

I must admit that .75 micron is very fine I just wonder if you mean 75 micron or perhaps even .75mm ( which is not very fine) taking into account the grading down from 4mm.

To avoid dust issues, I would use a closed machine with dust extraction.

Please send your specifications and details by email so I can give a detailed answer. ■

.75 micrones = 750 nanometers = 7,5e-7 meters.

I don't think the the way to produce such fine powder is screening. ■

The finer we get in screening ....the harder it gets for sure.

ROTEX has a unique screener for fine cuts....as does WS TYLER....screening successfully down to 100/200 down to 500 mesh CUTS...on their HUMMER type screens....and controlling dust at the same time.

need to get for feed imput gradations and your products out put needs and a simple confirmation of the type of machine can be easily made.

G Baker - MODERATOR ■

Originally Posted by redtrev

Greetings!!!

Is there any one here who can speak of experience of screening succesfully the minus .75 micron material out of a dry limestone material grading of 4mm down? How has this been done successfully and without causing dust problems.?

The quality of the ore,

the Rockwell or Mohs hardness, and

the end use of the ore directs which,

and what, and where one begins

with this puzzle.

The issue is more one of preparation being

type of explosive,

shot vibration issues,

drilling pattern density,

shot hole depth,

shot hole loading depth,

use of hole stemming,

the shot timing sequence

being full pattern bench shooting

or single line shots in surface bench mining shots

and desired primary breakage.

Short of blindly wet grinding and recirculation

or hammer mills and scalping screens................

If you plan on pelletizing it is one thing but

making hydrated agricultural lime is what you

wish to do apparently. ■