Sandvik DD422i has the widest range of automatic drilling functions, able to achieve reduced over-breaking with maximized pull-out per blast. It’s the ideal choice for underground mine development and small-scale tunneling.
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FILTER AND SPIN GRIDS
There are two main techniques:
- Welded technology
- Looped technology
GIRON offers both versions to suit your applications and problems. In both cases, the product flows over a totally smooth surface made possible by the succession of wires. The space between each profile creates a gap, known as an interstice, fissure or slot.
In the welded versionThe wire is manufactured by rolling from round wire. Rolling is the most common process, generating a profile with slightly rounded edges. These profiles are then welded to perpendicularly positioned cross-members.
In the curly versionThe trapezoidal wire was stamped from round wire. GIRON’s contoured fissure grids have been developed for over 50 years. Stamping produces protruding edges for high drainage efficiency. These profiles are then assembled on rounds. At GIRON, the steel round is 7 mm in diameter and the loops have a pitch of 70 mm.
This technique guarantees opening accuracy unsurpassed gap widths, especially for very fine cracks. Grids can be supplied flat or curved, bare or with all types of reinforcement such as flats, angles or other accessories.
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PLANFISS (PFS)
These screens are designed for screening materials that produce clogging “fines” during processing (e.g. fertilizers).
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“Limestone and Gypsum” Mineral Processing Plant
SBM Mineral Processing plants for medium-hard stones with a low quartz content are equipped with heavy discharge chutes and reciprocating feeders under the feed hopper.
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