mining chemical industry extraction

When they say “mining and chemical industry”, many immediately imagine a quarry, explosions, piles of ore. But this is just the tip of the iceberg, and often the simplest part. What happens after is much more complicated - enrichment, processing, production of that same chemical product. This is where the real work begins, and where those who think that they have bought a powerful excavator or crusher are often mistaken - and it’s done. In fact, the key link is the preparation of raw materials, their separation, and here you can’t do without special equipment, such as magnetic separators. It is at this stage that it is decided whether the final product will comply with GOST or go to waste.

From ore to concentrate: where the real problems lie

Let's take, for example, apatite-nepheline ores. Got it. Further? It is necessary to separate apatite from nepheline. Theoretically, everyone knows about flotation, but in practice, the effectiveness of flotation directly depends on how well the ore is prepared in size and how paramagnetic impurities are removed. If there is magnetite or other magnetic minerals in the ore, they can "contaminate" concentrate, reducing the P2O5 content. And here the question arises aboutmining chemical industry extractionnot as a single action, but as a chain where each link is critical.

I personally encountered a situation at one of the plants in the Murmansk region: they installed a new crushing and screening line, but the yield of marketable apatite concentrate did not increase. It turned out that the old magnetic separation circuit at the entrance to the grinding cycle could not cope with the increased volume - some of the magnetite went further, interfering with the operation of the flotation machines. I had to revise the entire pre-enrichment scheme. This is a typical example when production and primary crushing are going well, and then there is a slippage due to underestimation of auxiliary processes.

It is for such “bottlenecks” and there are companies that focus not on giant excavators, but on technological equipment for processing. For example, the LONGI corporation (website:https://www.ljmagnet.ru). Since 1993, they have been in exactly this niche - the development and production of mining equipment, and in their product range, as I know, separators occupy an important place. Not the equipment that thunders in the quarry, but the one that quietly works in the factory and determines the economics of the entire process.

Magnetic separation: not a “magic wand”, but a precision tool

A common mistake is to consider magnetic separators a universal solution. Like, I installed it - and all the hardware was gone. In reality, everything depends on the ore matrix, particle size, field strength and even drum wear. A dry magnetic separator for pre-enrichment is one thing, but a wet high-gradient one for finely dispersed products is quite another. Bmining chemical industrywith its variety of raw materials (potassium salts, phosphorites, sulfur), the approach must be individual.

I remember a project for the enrichment of nepheline ores, where they tried to use a standard drum design. It didn’t work out - there was too much sludge, the material was “smeared” over. drum. Engineers from LONGI, by the way, then proposed testing a roller separator with a variable field gradient for a clearer separation. But the plant’s management first took the path of reducing the cost and bought something less specific. As a result, after six months we still returned to this option, wasting time and money. Experience has shown: saving on separation accuracy means saving on the entire final product.

That is why at large enterprises, where tonnage and stability are important, they look not only at the price tag of the equipment, but also at the possibility of its integration into the existing technological chain. The LONJI plant in Fushun, with its area of ​​140,000 m2 and a staff of engineers (more than 60% with higher education), is precisely focused on this kind of work - not just selling a unit, but offering a solution for a specific ore and specific conditions at the plant.

Logistics and reliability: what textbooks don’t write about

Another point that becomes clear only in practice is ensuring uninterrupted operation.ProductionThe supply of raw materials may be seasonal or continuous, but the processing plant usually operates on a continuous basis. And if there is a critical unit on the separation line, stopping it can cost a lot of money. Therefore, the issue of reliability and service comes to the fore.

The same LONJI, according to their data, has a production capacity of about 4,000 units of equipment per year. This speaks of the scale and, theoretically, of the sophistication of the processes. But for the consumer, something else is more important: how quickly they can supply a spare part, for example, a coil for an electromagnet, or send a specialist for setup. In Siberia, at one of the chemical plants, there was a case: an imported separator failed, it took at least a month to wait for a specialist from Europe. We switched to a backup line with less efficient equipment, and concentrate losses were significant. After this, they began to pay more attention to the localization of the service and the availability of spare parts warehouses in the region.

This is about the question of choosing a supplier. A large facility that manufactures everything itself (from molding to electronics assembly), like LONGI, often has an advantage in quality control and timing. But again, this is not a guarantee, but only a factor. You need to look at real cases, at how their equipment behaves on specific raw materials after a year or two of intensive work.

Economics of the process: it is necessary to count to the end

Allmining chemical industry extractionand recycling comes down to numbers. Cost per ton of concentrate. Here every detail matters. Magnetic separation, for all its apparent auxiliary value, is just a way to reduce the load on subsequent, more energy-intensive and expensive stages (for example, flotation or chemical leaching). By removing 5-7% of magnetic impurities at an early stage, you save reagents and electricity per ton of the final product.

But to calculate this, you need accurate data. Not “industry average?”, but according to your ore, with your content, humidity, abrasiveness. Often enterprises do not have a culture of detailed technological audit. You arrive and ask: “What is the granulometric composition after the first stage of crushing?” - they shrug their shoulders. Without this data, selecting equipment turns into guesswork. Manufacturing companies that value their reputation usually insist on laboratory and pilot testing. It's a long process, but it's the only way to avoid a costly mistake.

The LONGI Corporation, judging by their scope (development and production), in principle, should have its own laboratory base for such tests. This is a serious competitive advantage. After all, you can show the customer not just a beautiful catalog, but specific extraction schedules for his ore sample. This is the very “professionalism” that is valued in the industry above loud slogans.

Looking to the future: ecology and integrated use

Nowadays people are talking more and more about ecology and waste-free technologies. This is especially important in the mining and chemical complex. Dumps and enrichment tailings are not only a loss of potential product, but also a burden on the environment. Current trends inproductionand processing lead to extracting the maximum from the ore, and the tailings are either stored more safely or used, for example, in construction.

Here again, fine separation technology comes to the fore. To extract from ?waste? something else valuable, we need high-precision separators capable of working with fine classes. This is an area where there are still many unsolved problems and where there is room for development for companies like LONGI. Their experience in creating industrial equipment may be in demand for creating closed cycles at mining and chemical enterprises.

In the end, back to the beginning.Mining and chemical industryis a complex organism. Extraction is just the first step, followed by a whole world of technological nuances. And success here depends not on the scale of technology in the quarry, but on the accuracy and reliability of decisions at the factory, on the ability to calculate the process down to the smallest detail, and on the choice of partners who understand the essence of the problem, and do not just sell hardware. Experience, including negative ones, suggests that the stingy pays twice, especially when it comes to preparing raw materials for chemical processing.