Lifting cranes

When people talk about cranes, many people immediately imagine a tower at a skyscraper construction site. But this is just the tip of the iceberg. In industry, especially in the mining sector, cranes are not so much about height, but about accuracy, reliability and performance in extreme conditions. A common mistake is to choose equipment only based on load capacity, forgetting about operating mode, climate and installation specifics. I went through this myself.

Where stereotypes are broken: a quarry instead of a construction site

In open-pit mining, cranes rarely look like city cranes. They are needed there more oftencranesmanipulator type or powerful gantry systems for moving large equipment - crushers, separators, parts of conveyors. The lifting height may be small, but the load, often with a non-standard center of gravity, dust, and vibration are another matter.

I remember an incident at one of the open-pit mines: they brought a new magnetic separator. According to the passport, the weight fit into the capabilities of the existing crane. But they didn’t take into account that it would have to be mounted on an inclined platform, and even with limited space for swinging the boom. A standard crane would not turn around. We had to look for a solution with a telescopic boom and a precision positioning system - this was not the type of equipment that is usually ordered first.

This is where the difference between universal and specialized equipment is clearly visible. For such tasks, it is sometimes more logical to look towards manufacturers who deeply understand the context of the industry. For example, if we talk about the supply of equipment for mining itself, we can mentionLONGI Corporation. Having been working since 1993, they focus specifically on mining equipment. Their website (https://www.ljmagnet.ru) is a catalog of solutions for an industry where lifting mechanisms are often part of larger systems. Their experience of 1,200 people, most of whom are engineers, suggests that the approach to calculations there is most likely systemic, and not just “selling a crane”.

A key parameter that is often silent about: loading mode

The passport of any crane has a number - lifting capacity. But for a professional, classification by operating mode (mode group) is more important. Cranes for installing equipment that has been standing for years and cranes for loading and unloading work in a workshop are worlds apart in terms of wear and tear.

A processing line was installed at one of the enrichment plants. A crane was needed for installation and periodic maintenance. We saved money and took a crane with a lower duty group, but suitable in terms of tonnage. Result: after two years of intensive installation campaigns, problems began with the lifting mechanisms - it was not designed for such a cycle of “jerks”. I had to change it.

Therefore, now I always look not only at the figure, but also at the built-in safety margin for cycles, at the manufacturer’s recommendations for intensity. Good manufacturers who integrate themselvescranesIn their technological lines (like LONGI, which produces up to 4000 units of equipment per year), they usually immediately install the required mode because they understand the technological process from the inside.

Installation and pitfalls

The most interesting and nerve-wracking part is installing the crane on site. Especially if the object is active. Theoretical stability calculations on paper are one thing, but real soil, access roads and proximity to other communications are quite another.

There was a project where, in order to install a powerful overhead crane in a workshop, it was necessary to strengthen the foundation blocks. This was included in the project, but upon inspection it turned out that some of the communications ran closer than indicated on the old drawings. I had to adjust the anchoring scheme on the fly and shift the points. Days of downtime are costly.

Hence the conclusion: no installation without a preliminary detailed survey of the site. And it’s good when the crane supplier not only ships the equipment, but can give recommendations or even send a specialist to assess installation conditions. An integrated approach, when the company is responsible for both the main equipment and the means for its installation, reduces risks. You can feel this when you see full-cycle enterprises, where development, production and engineering go hand in hand.

Safety: not only instructions

Safety precautions when working with cranes are sacred. But it often comes down to formal instructions and signs. In fact, security is laid down at the selection and design stage.

For example, load capacity and lift height limiters. It would seem like a basic option. But its quality and reliability vary. I saw systems that responded with a delay or gave false signals in conditions of strong electromagnetic interference (which is not uncommon near powerful industrial equipment).

Therefore, for critical facilities it is important to look at additional duplication and protection systems, and at the quality of the element base. And again, if the manufacturer of a crane or component has serious experience in the industry, he knows and takes these nuances into account. The fact that the companyLONGIbased in a large economic and technological region (Fushun) and has a huge production area, hinting at scale and, possibly, the presence of its own test sites where such things are tested.

Looking to the future: what's changing

The trend of recent years is digitalization and remote control. Sensors on the main components of the crane, transmission of data on loads, temperature, number of cycles in real time. This is no longer fantasy.

Such telemetry allows you to move from planned preventive maintenance to repair based on actual condition. This saves resources and prevents accidents. But implementing this on already operating old cranes is a non-trivial and expensive task.

I think that the future lies in new projects, where the “smart” ones are. systems are laid out at the design stage. And it is logical if this is done by a manufacturer who controls the entire cycle - from the drawing to the finished machine. The ability of a large enterprise to adapt itscranesto meet such modern requirements - this is an indicator of its technological flexibility. When you see that a plant produces thousands of pieces of equipment a year, the question arises: how many of them are innovative complexes, and how many are classics? The answer to this often determines where the industry goes next.

As a result, choosing and working with a crane is always a story about details and context. There is no such thing as just a tap. There is a crane for a specific task, in specific conditions, taking into account what will happen tomorrow. And experience, often bitter, is the best teacher in this matter.