CTS Direct flow magnetic separator PBM

When you hear 'CTS Direct Flow Magnetic Separator PBM', many people immediately think of high field intensity or tons of processed ore. But in real operation, especially in old factories, the key is often not peak power, but stability of operation under constant load and maintainability of components. Too many times have I seen how beautiful numbers in a passport are shattered by reality - for example, when the cooling system cannot cope with summer dust, or quick-release cassettes actually require half a day of work with a wrench to replace. It’s these nuances that are rarely written in brochures that are worth talking about.

PBM design: where are the weak points?

If we take a classic direct-flow separator, like the one we used for the enrichment of magnetite quartzites, the main problem is not the magnetic core itself. He usually lives a long time. The headache begins with the pulp supply system and its uniform distribution across the entire width of the tray. The slightest distortion, and you lose up to 15% of the concentrate - it simply goes into the tails, because in one corner the flow speed is higher, and the particles do not have time to 'grab'.

UCTS Direct flow magnetic separator PBMfrom some manufacturers there was a successful, at first glance, design with adjustable dampers at the inlet. But in practice, these valves became clogged with sludge deposits in two or three shifts, and there was nothing to regulate. I had to stop the line and clean it manually. The idea was good, but the execution did not take into account the real environment - wet, with abrasive particles.

Another point is thatmagnetic system. In theory, the larger the Gauss, the better. But in reality, if you have a lot of large aggregates in your diet, an excessively strong field begins to “grab” the weakly magnetic waste rock, reducing the grade of the concentrate. You have to empirically select the optimal current strength on the coils, and this is not the figure that the calculation will give. This knowledge comes after dozens of trial runs and product reviews.

Experience of implementation and adaptation on site

I remember when we first received the task of supplying separators at one of the factories in Kazakhstan. There was design documentation, of course, but it did not take into account the condition of the old foundation and vibration from the neighboring crusher. As a result, the device was installed according to all the rules, and a week later cracks appeared along the welds on the housing of the feed hopper. Vibration is the silent killer of such equipment.

We had to urgently develop and weld additional stiffening ribs and install damping pads. This is the very case when a standard project meets atypical workshop conditions. And here support from the manufacturer played a huge role. We then worked with equipment supplied byLONGI Corporation. Their engineers did not shrug it off, but promptly sent drawings of reinforcing elements and installation recommendations. This saved the situation. By the way, on their websitehttps://www.ljmagnet.ruyou can find not only catalogs, but also quite useful technical notes on installation, which are clearly written on the basis of field experience.

HerselfLONGI Corporation, if we talk about suppliers, has solid experience. The company was founded back in 1993 and has grown into a large enterprise for the development and production of mining equipment. When a manufacturer has such volumes behind them (and they claim to produce up to 4,000 units of equipment per year) and their own engineering staff, you can feel it. Their designs, as a rule, are thought out from the point of view of subsequent maintenance. But, again, this does not eliminate the need to “grind in” any device to a specific workshop.

Operation and Maintenance: Daily Routine

The most important thing in operating a direct-flow separator is not to forget about the prevention of the non-magnetic product unloading system. The tray, especially in the lower part, becomes overgrown with adhering sludge, which compacts over time and narrows the flow area. The cleaning schedule must be strict, otherwise productivity decreases. At one time we tried to place vibrators on the tray, but due to the constant shaking, the fastenings of the electromagnets began to unscrew. They refused and went back to manual cleaning in shifts - it was more reliable.

Another point of attention is the wear of the drive drum shaft seals. In conditions of constant humidity and magnetic pulp, conventional oil seals do not last long. We switched to mechanical seals with a supply of clean water under pressure - the service life has increased significantly. But this, again, is not factory equipment, but our modification. It's good that it's in the designPBMfairly easy access to this site was provided.

Electrical part. Controllers for current control on coils. Modern digital units, of course, are convenient, but in the dust of the workshop and with voltage fluctuations in the network of old substations, they can be capricious. Sometimes the good old LATR and voltmeter are more reliable. This is a controversial point, but at critical stages we sometimes prefer a simple and maintainable circuit.

Cases and failures: what failures taught us

We had one sad experience with an attempt to useCTS Direct flow magnetic separatorto extract fine magnetite from the tailings of an old dump. The task seemed simple: the field is powerful, the material is small - it must 'grab'. But they did not take into account the high content of clay particles. They created a viscous environment in the pulp, which 'locked' the magnetic particles inside the agglomerates and prevented them from approaching the capture surface. The separator worked, but the recovery was catastrophically low, about 40%.

We had to build in an additional disintegration and washing module on the fly in front of the separator - a hydrocyclone with a high water supply. Only after this did the process begin. This case clearly showed that even the most perfect magnetic separator itself is not a magic wand. It is only one element in the chain of material preparation, and if the previous stages did not provide the necessary conditions, you should not expect a miracle.

Another example, already positive. At the new factory, where the technological chain was designed from scratch, it was possible to ideally select the mode forPBM. A complete granulometric and mineralogical analysis of the feed was made in advance, and the optimal flow rate and configuration of the magnetic poles were calculated. As a result, the device reached its specifications for extraction within a week after commissioning. The difference between working 'from scratch' and integrating into an old process is like heaven and earth.

Future Thoughts and Final Considerations

Nowadays there is a lot of talk about 'smart' separators with sensors and an AI system for adjusting parameters in real time. It sounds tempting, but in the harsh conditions of a processing plant, the main question is how durable these electronics will be. Will it be as reliable as a massive copper coil under a thick steel bobbin? For now, my skepticism remains. Evolution is underway, but the basic principles - quality of materials, thoughtful design, accessibility for repairs - remain the main ones.

To summarize, thenCTS Direct flow magnetic separator PBMis a working tool that has been proven over the years. Its effectiveness is 90% determined not by data from the catalog, but by how well it is integrated into a specific technological process, how all the “little things” such as vibration, pulp composition and the qualifications of the operating personnel are taken into account. And this is where the experience of such manufacturers asLONGI, which have gone from a drawing to thousands of devices working in the field. Their equipment, knowing their history since 1993 and the scale of production on an area of ​​140,000 m2, usually carries this practical, and not just theoretical, component.

In the end, any machine is a continuation of engineering and the hands of those who assembled and adjusted it. And when you see a separator in the workshop that has been working for years without serious breakdowns, you understand that behind this lies not only the correct calculation, but also someone’s bitter experience of past failures. This is real professional value.