Flour, Maize & Rice Milling

• Removal of tramp and large metal pieces.
• Prevention of dust explosion caused by metal entering high impact machinery.
• Protection of damage to high impact machinery, e.g. first break roll.

Commonly used magnets include plate magnets, hump magnets and drum magnets. Due to excessive wear and abrasion of grain, grate style magnets were not usually considered effective – until the development of the MAG-RAM® Automatic Self-Cleaning Separator.

This design removes the need for any of the above-mentioned designs. The low profile system needs very little headroom, has built in contingencies for anti-abrasion with the special Dura-Slik® Ram design, and an ever-changing contact point on the bars.

View the Mag-Ram® page here.

• Protection of whiteners, color sorters (grain/rice), sieve and sifter conditioners, rotary seals, pneumatic transfer lines, etc.

Rapidclean® Grate Magnets are ideally used prior to whiteners, sieves and sifters, and have rotary seals to protect against damage.

Mag-Ram® Self-Cleaning units are also often used in these locations to reduce downtime and operator cleaning time. They are also perfect on conditioning and color sorting locations due to the durability and rugged design features – including the resistance to abrasion and dependable in-stream cleaning features.

Pneumatic transfers ideally utilize the Spherical Blowline Magnet, especially on low abrasion transfers of wheat/rice flour, semolina, bran and soft grains such as barley, sesame seeds and quinoa. Dura-Slik® wear components can be used where the Spherical is installed in pneumatic transfers containing grain.

GRAVITY BAG FILLING

The Rapidclean® Grate Magnet is ideal for small bag (e.g. 25 kg / 50 lb.) filling, as our Mag-Ram® Self-Cleaning options also are.

Magnets are usually placed under storage hoppers or immediately prior to packing equipment for optimum efficiency and to reduce the risk of metal contamination from any moving parts or upstream mechanical equipment that finds its way into the product.

The Rapidclean® Grate Magnet is available in single, double, or multiple row configurations and the design covers key final magnet considerations such as coverage, strength and easy-clean features which enable metal fragments to be easily collected for analysis and quantifying.

PNEUMATIC TRANSFER LINES FOR BULK FILLING OR STORAGE HOPPERS PRIOR TO PACKING OR OUTLOADING

Magnattack® Spherical Pneumatic Transfer Magnets are an extremely effective means of collecting fine weakly-magnetic fragments from final flour and milled products, and can be positioned upstream of cyclone storage hoppers or in bulk fill blowlines to tankers, etc.

Conventional blowlines usually consist of either dual plate systems, bullet style magnets, and in some cases, bar magnets installed transverse to the flow of the product. 1” / 25mm bars (or similar) positioned in a housing or slide-out type drawer transverse to the product flow do not provide enough surface area underneath the bar to ensure the collected fragments are retained.

The bulk of the high intensity magnetic energy that the RE80® Spherical Magnet produces, combined with the high coverage and surface area of the Spherical element, ensures that extraction of weakly-magnetic fragments in high velocity blowlines is extremely successful.

In most cases, grate style magnets are used in gravity bulk filling applications, although sometimes this can be difficult due to limited access for magnet cleaning.

Where a platform or catwalk is available to access the magnets for cleaning, Magnattack® will often suggest the Rapidclean® Grate Magnet design which has either a swing-over or swing-away drawer design, depending on the available headroom. This system consists usually of 2 rows of RE80® Grate Magnets, with the lower drawer utilizing higher retention capabilities than the upper drawer, so that the final pass of product reaches optimum extraction efficiency. Both rows are at a minimum of 10,000 gauss.

Where space and access is difficult, the Mag-Ram® Self-Cleaning Separator is used to ensure magnetic coverage is maintained and the magnet can be frequently cleaned without the need to access. Metal collections are vented or vacuumed to a convenient location for operators to collect and pass on to the laboratory or dispose of.