impurity removal process

When they talk aboutimpurity removal process, many immediately imagine ideal schemes from textbooks. In fact, everything depends on the specific material, its humidity, fraction and those same “unaccounted factors” that appear only on the line. It’s these nuances that are rarely written in brochures that are worth talking about.

From theory to assembly line: where the problems begin

Let's take coal beneficiation, for example. In theory, everything is clear: magnetic separation for ferromagnetic impurities, gravitational methods for separating rock. But in practice in Fushun we were faced with the fact that the coal mass often has a high ash content due to fine clay inclusions. They are not magnetic and the density is close to coal. Standardimpurity removal processit's stalling here.

I had to experiment with a combination of methods. We added a washing stage in heavy-medium separators. But then a problem with the reagents arose - their consumption turned out to be higher than calculated, plus the disposal of the suspension. This is a typical example when the solution to one problem gives rise to two new ones. At this point many people give up on the idea, but this is where the real engineering begins.

As a result, for such “capricious” ones materials, we at LONGI often offer not a ready-made solution, but pilot tests at our stand. Because without real material, all calculations are just pretty numbers. On our website https://www.ljmagnet.ru there is a description of this approach, but the essence, of course, is in the details, which are already discussed in the workshop.

Equipment as a living organism: setup and adaptation

The key element in the chain is the magnetic separator. You can buy the most modern model, but if you do not adjust the gap, drum rotation speed and field strength for a specific fraction, the efficiency will drop significantly. I remember the case with the enrichment of iron ore concentrate. We arrived at the enterprise - the separator is working, but the product yield is low.

They began to figure it out. It turned out that the material was wetter than stated in the technical specifications. The moisture stuck together small particles of ore and gangue, forming agglomerates that the separator could not separate.Impurity removal processgot up. The solution was not to replace the equipment, but to add a simple drying chamber before serving. Sometimes efficiency does not depend on complexity, but on understanding the physics of the process.

That is why at our Fushun plant, where we employ more than 1,200 people, we pay such attention not only to production (up to 4,000 units of equipment per year), but also to training engineers. It is important that a person knows how to “feel?” line, and not just press buttons according to instructions.

Common mistakes and false economies

The most common mistake is an attempt to save money at the line design stage by simplifying the cleaning scheme. It seems that you can get by with one separator instead of two or three. In the short term - yes, savings. But then constant downtime begins due to clogged sieves, increased wear of equipment due to abrasive impurities and, ultimately, low quality of the final product.

The second point is ignoring the preparation of raw materials. If the material has not been pre-classified into fractions, even the best separator will not provide a clean separation. Small and large particles behave differently in a magnetic field or in a heavy environment. These are the basics, but for some reason they are often forgotten.

The LONGI Corporation, working since 1993, has accumulated a whole archive of such “instructive” ones. cases. Often they become the basis for upgrading our standard equipment models. We don’t just sell equipment, we actually sell a proven and proven technological chain, where each node is verified in practice.

Integration into existing lines: pitfalls

Often the task is not to build a line from scratch, but to integrate a new cleaning unit into an already operating production facility. This is where the real quest begins. It is necessary to fit into the existing dimensions, establish communications, and synchronize productivity. And the main thing is not to stop the main production for a long time.

There was a project at one of the mining and processing plants. It was necessary to add a step forremoving impuritiesin the form of weakly magnetic minerals. Places - minimum, line stop - no more than 72 hours. We have developed a modular solution based on a roller separator with a high-gradient field. The installation was carried out “from wheels”, using pre-assembled blocks. It worked.

Such projects require not only engineering ingenuity, but also the well-coordinated work of an entire team - from designers to installers. The fact that more than 60% of LONGI employees have higher professional education plays a key role here. Understanding comes not only from drawings, but also from personal experience.

The Future of Cleaning: Where the Industry is Heading

Now the trend is not just to remove impurities, but to do it with maximum selectivity and minimal energy consumption. There are more and more requests for systems with a closed water cycle, for automatic adaptation of operating parameters to the changing composition of raw materials in real time.

We are experimenting with spectrometry-based sensors that can ?see? composition of the flow on the belt and give a signal to adjust the separator parameters. While this is expensive and not always reliable in conditions of workshop dust, it is a promising direction. Trueimpurity removal processof the future is a smart, self-adjusting system.

But no automation can replace the experience of a technologist, who can determine by the sound of the engine or the type of concentrate that something has gone wrong. Therefore, in my opinion, the future lies in the symbiosis of digital technologies and human expertise. This is exactly what our work at LONGI Corporation is aimed at: creating equipment that expands human capabilities, and does not simply replace them.

Ultimately, all this work - from the drawing to the running line - comes down to one goal: that the client receives a clean product of predictable quality. And every new, even unsuccessful, experiment withremoval of impuritiesbrings us closer to simpler and more reliable solutions. The main thing is not to be afraid of these experiments and clearly record the results. Experience, as we know, is the son of difficult mistakes.