Vertical roller mill

The price difference of a used VRM depends on factors such as its age, brand, model, capacity and condition. In our experience, the price is about 40% to 70% of a new machine. A well-maintained TRM used medium-sized VRM with a capacity of 100-150 tons/hour, which may be 3-5 years old, costs about 50% of a new machine. If a new VRM of the same size and specifications costs about $1 million, a used VRM may cost between $300,000 and $700,000. Older or heavily worn models may be cheaper, while high-end models that are almost new or have been used less frequently may cost close to 70% of a new machine.

There are many channels to buy second-hand cement grinding vertical roller mill. There are online platforms such as MachineryTrader and EquipNet and Alibaba that focus on second-hand industrial equipment, and there are also professional industrial equipment brokers who specialize in cement-related machinery. But if you need a full range of services such as disassembly, refurbishment, installation, etc., then Tongli is your best choice, because Tongli itself is the manufacturer of vrm mill, and its resources and experience in disassembly, refurbishment, and all aspects are imcomparable to ordinary trading companies. Here is the link: www.cementl.com

First, visually inspect the exterior for signs of damage, corrosion, or excessive wear. Inspect key components such as grinding rollers and grinding tables. Measure the depth of wear on the surfaces of rollers and tables; if the wear exceeds 20-30% of the original thickness, performance may be severely affected. Check the condition of the drive system, including the motor, gearbox, especially sensors. Use a vibration analysis tool to detect any abnormal vibrations in rotating parts, as excessive vibrations may indicate bearing problems or misalignment. If there are equipment maintenance records, you can learn about the service history. These are some of the most basic checks, but whether there will be any problems in disassembling the entire thing and then assembling it again requires a comprehensive assessment by Tongli's installation and after-sales engineer.

The main risk is hidden mechanical failure. The previous owner may not have disclosed all the problems, and components such as bearings, gears or hydraulic systems may be on the verge of failure. For example, some parts may be worn, but the seller did not tell you, because it cannot be seen with the naked eye without disassembly and inspection, and ultrasonic or magnetic particle inspection is required.

Other risks are that the warranty of the motor and reducer has expired, and if it is broken, you need to repair it yourself. There is no way to guarantee that sesors are still in good condition because you can't see it if the equipment is not running.

Another thing is whether the vertical mill can operate normally after it is completely disassembled and reassembled. This requires Tongli's professional installation engineers to guarantee. General trading companies do not have such professional personnel to give such guarantees. There is also a certain probability that parts will be damaged during the disassembly process, and this part of the risk is what buyers need to consider.

Yes, second-hand vertical roller mills can usually be upgraded or modified. Tongli has many modification cases. By increasing the grinding disc, grinding roller and motor power, the output can be increased by 20%~40%, which is a major modification. Other minor modifications, such as adding an auxiliary grinding system, can increase the output by 15% without affecting the main system, or adding an intelligent control system that can adjust the parameters such as grinding pressure, air volume and temperature in real time, thereby improving the consistency of product quality. Anyway, modification is possible, but in general, buying a new one is more secure.

The service life of a second-hand vertical roller mill depends on how much it has been used, how well it has been maintained, how well it has been disassembled, how well it has been refurbished, and how well it has been installed. In simple terms, if the initial design service life of a vertical roller mill is 25~30 years and it is well maintained, it has been used for 5 years and the remaining service life may be 20 years. However, if it is not well maintained and the parts are severely worn, the remaining service life may be greatly shortened. If the second-hand equipment is dismantled and the worn parts are repaired and refurbished, then the service life can basically reach the same as the new one. If it is not refurbished, then the service life depends on the specific situation of the equipment.

The benefits of a new vertical roller mill (VRM) are that it is the latest model, it is more reliable, and comes with a full manufacturer's warranty. It typically uses less energy, with modern models using 15-25% less energy than older models. However, it also costs more. On the other hand, a used VRM is more cost-effective, often costing 30-70% less than a new VRM. If you can find a well-maintained used unit, it can still provide good performance. But it may have some wear and tear, and the risk of breakdown may be slightly higher. For businesses with a tight budget and who need to increase capacity immediately, a used VRM may be a better choice; whereas those who need high volumes, long-term production, and have a large budget may prefer a new VRM.

Some of the top manufacturers of vertical roller mills, whose used units are highly sought - after, include Loesche, Gebr. Pfeiffer, and FLSmidth, Citic, Tongli, UBE. Loesche is known for its high - quality and energy - efficient vertical roller mills. Their used mills often retain good performance due to robust construction and advanced design. Gebr. Pfeiffer's vertical roller mills are popular for their reliability and wide range of applications in the cement, mining, and power industries. Used Gebr. Pfeiffer VRMs are valued for their long - lasting components and efficient grinding technology. FLSmidth also manufactures high - end vertical roller mills. Their used units may have advanced features such as sophisticated control systems and optimized grinding paths, which can still be beneficial even in a second - hand state.

The transportation cost of a second-hand vertical roller mill depends on the distance, size, and weight. You can consult the freight forwarder for details. For a medium-sized vertical roller mill (VRM) with a transportation distance of 1,000 kilometers, the transportation cost may be around US$50,000, and that is when it is disassembled. For installation, the manufacturer can generally send an installation engineer, and then the customer can find some ordinary workers on site. The cost of installing a vertical roller mill in China is about US$30,000. For overseas installation, it costs about US$60,000 (mechanical part only), including travel expenses, road expenses, accommodation expenses, and overseas service fees. However, if the installation requires complex foundation engineering, wiring, or integration with existing systems, the cost may be much higher.

The grinding roller wears badly during operation, so having spare rollers or at least spare roller sleeves can minimize downtime. 2. Seals prevent dust and debris from entering sensitive parts, and worn seals should be replaced regularly. 3. Bearings are critical spare parts 4. Other wearing parts include grinding disc liners, middle shell liners, etc., which will wear over time. In fact, all of the above are mechanical parts, which are relatively easy to break.

As a manufacturer, I can tell you responsibly that the most important and most important things to check for a second-hand vertical mill are the motor, oil station and sensor, because these parts are precision parts, and the warranty period has expired. If they are not good, they need to be repaired or replaced, which is time-consuming and expensive, so please focus on checking these.

TONGLI Heavy Machinery, is a realiable supplier and dealer of second hand used vertical roller mill, because Tongli is a vertical roller mill manufacturer, its resources and information in all aspects are richer than those of general trading companies. As a manufacturer, it has a full understanding of the structure and components of the vertical mill. It will fully evaluate and inspect the second-hand vertical mill and replace the worn parts. If you have inquiry about a certain brand or a certain model, tongli can even reach out to that specific model. Sweet!

When properly refurbished, a vertical roller mill can be very safe to use in a cement plant. Reputable refurbishers follow strict safety and quality standards. They thoroughly inspect and replace worn - out or damaged parts, such as safety guards, electrical components, and mechanical linkages. For example, they will ensure that all electrical wiring is up to code, reducing the risk of electrical malfunctions. The refurbished mill will also be tested under simulated operating conditions to verify its safe and proper functioning. Additionally, the refurbisher may provide updated safety manuals and training for the plant's operators. However, it's crucial to ensure that the refurbishment is carried out by a qualified and experienced company to guarantee the safety of the equipment.

The production capacity of a second-hand vertical roller mill depends on how big the original buyer bought. Generally, for grinding cement, the smaller one has a production capacity of 20-25 tons, the medium one has a production capacity of 70-82 tons/hour, and the large one has a daily production capacity of 5,000 tons and is equipped with a 100-160 ton mill. For example, for grinding slag powder, a 200,000-ton annual slag production line uses a vertical mill with a grinding disc diameter of 2,000 mm, and a 300,000-600,000-ton annual slag production line is equipped with a vertical mill with a grinding disc diameter of about 2,800 mm. Small cement clinker production lines are equipped with 30-45 tons/hour vertical mills, medium-sized production lines use 60-80 tons/hour vertical mills, and large clinker production lines are equipped with 200-230 tons/hour vertical mills. So second-hand vertical mills are available in all specifications.

To evaluate the performance of a used VRM before purchase, start by checking its production history. If available, review the records of the amount of material it processed and the quality of the output over time. For example, in a cement - grinding application, check if it consistently produced cement with the required fineness (usually around 320 - 450 m²/kg specific surface area). Conduct a test run if possible. Monitor parameters such as power consumption during operation; a well - performing VRM should have power consumption within a reasonable range, typically 25 - 40 kWh/t for cement grinding. Examine the wear pattern on the grinding components. Uniform wear indicates proper operation, while uneven wear may suggest issues with the grinding process. Also, assess the efficiency of the classifier system by analyzing the particle size distribution of the output product.

The original manufacturer's operating manual is crucial as it provides details on proper operation, maintenance, and safety procedures. A maintenance log, if available, shows the history of repairs, part replacements, and routine maintenance, giving insights into the equipment's condition.

More important is the complete set of drawings and technical parameter tables of the equipment, because only with these two items can you determine whether the size is suitable or whether it can be installed on your new production line.

Another one is the foundation drawing. Only with the civil engineering foundation drawing can we pour concrete at the new project site while dismantling the second-hand vertical mill.