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3. Main device types
Of all the unit operations involved in mineral processing, screening is the most universal. Applications range from the sorting of very large blocks (scalping) to the finest classifications (down to 40 or 50 μm). For fine grading, sieving and hydraulic grading are superimposed. Les Travaux Publics de France
3.1 Static screens and grids
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Flat inclined grids
The first type of static grid encountered by raw material in all installations is usually a scalper or grizzly. This was originally a set of fixed longitudinal and/or transverse...
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Main device types
Also in our database
Bibliography
Software tools
Most of the available software packages are simulation models of complete mineral processing or aggregate production units. They always include a specific screening section. Examples include :
Usim-Pac: developed by BRGM and currently marketed by GASPEO http://www.gaspeo.net
Aggflow – The industry standard...
Events
SIM: Annual conference for mining and quarrying professionals http://www.lasim.org
INTERMAT (France) International exhibition of equipment and techniques for public works, construction and the materials industry (every 3 years). http://www.intermat.fr
...Standards and norms
- Test sieve – Metal fabrics, perforated metal sheets and electroformed foils – Nominal dimensions of openings. Classification number: X11-501 - NF ISO 565 - 11-90
- Specification for ware-cloth sieves for testing purposes - ASTME - 11-87
- Industrial screens – Metal fabrics, perforated sheets and electroformed foils – Designation and nominal dimensions of openings - ISO 2194 :1991 - 09-91
- Test sieve...
Directory
Manufacturers – Suppliers (non-exhaustive list)
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Screening equipment manufacturers
Allgaier (vibrating and circular screens) http://www.allgaier.de
Allis Mineral systems (USA) (BAVS banana screens) http://www.metsominerals.com
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Statistical and economic data
Investment costs are incurred when purchasing and installing an entire treatment unit.
It includes the following items:
material purchases 82.2% ;
equipment transport 4.1% ;
installation costs 10.3% ;
workforce 3.4%.
...
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