To perform product separation in gravity flows, pipelines or discharge spots, the following types of magnetic separators are traditionally used: drum magnets (BSM & SMBM models), plate magnets (PSM model), magnetic grates (SMR model) and more complicated grate systems (SM, SMK, ASMK models).

Magnetic drum separator SMBM is designed for continuous removal of ferrous metals from product flows. The gap between the product and the magnetic system of the SMBM separator is significantly smaller, than the one in the SMB separator, so there are no induction losses due to the thickness of the conveyer belt. Adjustable divider-knife, product distributing chute and other constructive features, together with a high-power magnetic system, guarantee high-quality regulable separation performance. SMBM separators show excellent separation results on many ore mining and processing enterprises and concentration plants, as well as on individual glass-producing factories.

BSM model of drum separators is an open - frame analogue of the SMBM model . It is usually used when clearance limitations should be taken into consideration and/or tramp metal should be discharged under an obtuse angle.

Recommendations:

• BSM& SMBM separator models guarantee complete removal of ferrous metal (including “technological” contamination, caused by product's abrasivity) from various products.
• Magnetic drums can be used for preliminary removal of ferrous contamination, before further concentration of the product on the high-intensity magnetic roll separator SMVI.
• When dealing with hot products (t>=60 °C), i.e. silica sand after drying, or when it is necessary to ensure long-term separation performance for magnets, installed in environments with elevated temperatures, high-temperature Nd-Fe-B or SmCo magnetic alloys should be used. Though more expensive, those alloys guarantee no irreversible reductions of magnetic strength, caused by exposion to elevated temperatures.
• Using magnetic drums is not advised when the separation product is adhesive (accumulates on the separator's sidewall and reduces the magnetic induction level) or abrasive (destroys the drum's sidewall), or, for the same reason, when large pieces of tramp metal can be encountered in the product.

Plate magnets (PSM model) can be manufactured as plate separators's parts ( PSM-1 & PSM-2 modifications) or as stand-alone magnets. Plate separators are designed as inclined or straight chutes with several plate magnets, effectevely covering the open flow area by a strong magnetic field. Stand-alone plates allow numerous installation opportunities and are convenient when clearance limitations should be taken into consideration.

Recommendations:

• Separation of abrasive products (glass cullet, etc.) is possible with plate magnetic separators with heavy-duty casings and removable protective covers.
• When dealing with hot products (t>=60 °C), i.e. silica sand after drying, or when it is necessary to ensure long-term separation performance for magnets, installed in environments with elevated temperatures, high-temperature Nd-Fe-B or SmCo magnetic alloys should be used. Though more expensive, those alloys guarantee no irreversible reductions of magnetic strength, caused by exposion to elevated temperatures.

Various grate housing assemblies ( SMR, SM, SMK, ASMK models) are designed for removal of small metal contamination from dry granulated products. High magnetic induction on the surface of single or muilti-layer grate assembly allow complete removal of ferrous contamination and a certain percentage of weakly magnetic inclusions. Simple magnetic grates (SMR model), which are usually installed in hoppers, so that the product must pass through them, are one of the cheapest and constructively-simple solutions to removal of tramp metal, their only disadvantage is that they should be cleaned manually. Mechanically-cleaned SM and SMK grate assemblies, as well as self-cleaning ASMK separators are installed in pipelines or gravity flows.

Recommendations :

• Magnetic grates are best used for separation of free - flowing dry products , which are not adhesive .
• ASMK gate assemblies can be used for preliminary removal of ferrous contamination, before further concentration of the product on the high-intensity magnetic roll separator SMVI.
• It's not advisable to use grate separators, when the product is known to contain large tramp metal, hich may damage the rod casings or magnetic systems.
• When dealing with hot products (t>=60°C), i.e. silica sand after drying, or when it is necessary to ensure long-term separation performance for magnets, installed in environments with elevated temperatures, high-temperature Nd-Fe-B or SmCo magnetic alloys should be used. Though more expensive, those alloys guarantee no irreversible reductions of magnetic strength, caused by exposion to elevated temperatures.