China high intensity wet electric magnetic separator

China high intensity wet electric magnetic separator is not just an ore beneficiation equipment. It is a precision instrument where every gauss, every liter per minute and every second of contact affects the yield of the concentrate. We saw how at a mine in Kazakhstan, replacing an outdated separator with a 1.8 Tesla controlled magnetic field model increased iron recovery from weakly magnetic quartzites from 62% to 79%. Such results are only possible with a thorough understanding of the physics of separation, operating conditions and the limitations of the process itself.

Why "wet" is not an option, but a requirement

Dry separation works only with strictly controlled humidity of the source material - below 3%. In practice, this means mandatory drying before enrichment, which means additional energy consumption, dust formation and loss of fines. A wet separator solves the problem radically: the ore arrives in the form of a pulp with a solid content of 25–40%, immediately after hydrocyclones or mills. Water performs three functions simultaneously: it transports particles, reduces friction between them and prevents jamming in the separation zone. We tested this at a mine in Uzbekistan: when switching from dry to wet mode, productivity increased by 37%, and energy consumption per ton of concentrate decreased by 22%.

High intensity is not about the numbers on the nameplate

Many suppliers quote "up to 2.2T" - but this value is only achieved at the center of the coil, under ideal conditions and without load. The actual field strength in the working area where the pulp passes is often 30–40% lower. True high intensity is a stable field of ≥1.6 Tesla across the entire width of the separation zone, even at loads of up to 80 t/h. This requires not just powerful windings, but a well-thought-out magnetic conductor system: laminated cores made of cold-rolled steel with low losses, cooling with oil under pressure and automatic compensation for temperature drift. This is exactly how the separators of the LONGI Corporation are designed. Their LJM-WIMS series models operate in the range of 0.8–2.0 T with an accuracy of ±0.02 T, allowing precise extraction tuning even for ores with variable magnetic composition.

Electric means controllable, predictable, economical

Permanent magnets are cheaper, but cannot be switched off, adjusted, or adapted to new ore. The electromagnetic drive gives real control: the operator changes the field strength in 8 seconds, switches between “coarse separation” / “fine cleaning” modes, stores parameters in memory for 12 types of ores. We observed how a client in Armenia reduced downtime when changing ore grades from 45 minutes to 7 - due to preset profiles. In addition, modern power supplies with IGBT switches provide efficiency above 94%, and the energy recovery system, when the field decreases, returns up to 18% of the consumed electricity back to the network. This is not marketing - this is measured data from three sites where LONGI separators are installed.

What to consider before buying - and why it's more important than price

Before choosing a specific model, we always ask clients to send three things: the granulometric composition of the pulp, a chemical analysis of the ore and a diagram of the operating concentrator. Why? Because:

• Fine fines smaller than 30 micronsrequires an increased time spent in a magnetic field - which means a longer drum length or a reduced rotation speed is needed;
• Presence of titanomagnetite or ilmeniteincreases the requirements for the field gradient - a simple separator with a uniform field will not cope here;
• Location of the separator after the classifierdetermines the need for a sealed supply system - otherwise there will be an imbalance in the hydraulic mode;
• Ambient temperature below −15°Crequires modification of the cooling system and anti-corrosion design of the housing.

LONGI Corporation is not just a manufacturer. This is a team of 74 magnetic engineers who carry out free pre-design calculations and test enrichments on their own laboratory installation. They don't sell the "standard model". They design a solution for your ore, your water and your process chain. Detailed technical specifications, connection diagrams and test reports are available on the websiteljmagnet.ru. There are also real photos of the installations, videos of work in the mine conditions and efficiency comparison tables for 17 types of ores.