How to solve common faults of MTW Trapezium Grinding Mill during operation?

1. Overview of MTW Trapezium Grinding Mill

The MTW Trapezium Grinding Mill is a flagship grinding product of Mascot Heavy Industry, specially designed for medium and fine powder processing of materials with Mohs hardness below 7 and moisture content less than 6%. On the basis of traditional grinding mills, our R&D team has carried out multiple technological innovations for MTW Trapezium Grinding Mill, adopting trapezoidal grinding roller and grinding ring structure, integral bevel gear transmission and internal dilute oil lubrication system, which completely solves the problems of low efficiency, high noise, easy oil leakage and short service life of traditional grinding equipment . The whole set of MTW Trapezium Grinding Mill has a compact layout, small floor area and full closed-loop operation, which can effectively control dust emission and meet international environmental protection standards. The applicable materials of MTW Trapezium Grinding Mill cover limestone, calcite, barite, talc, dolomite, quartz stone, gypsum and other common non-metallic minerals, and the finished powder fineness can be adjusted freely between 80-425 mesh, fully adapting to different production demands of various industries . As an upgraded version of the classic grinding mill, MTW Trapezium Grinding Mill balances production capacity, operation cost and finished product quality, and has strong market adaptability in large, medium and small grinding production lines.

2. Core Technical Parameters of MTW Trapezium Grinding Mill

The MTW Trapezium Grinding Mill of Mascot has multiple complete models to choose from, covering different production capacities and power configurations. The following two tables show the core model parameters and matching auxiliary equipment parameters of MTW Trapezium Grinding Mill for customers to select equipment accurately.

The above table lists the four mainstream models of MTW Trapezium Grinding Mill and their key grinding parameters. All models support stepless adjustment of finished powder fineness, and the maximum feed size increases with the model upgrade to meet the feeding requirements of large bulk materials. The following table displays the parameters of standard supporting auxiliary equipment for the complete MTW Trapezium Grinding Mill production line.

The complete set of MTW Trapezium Grinding Mill production line is composed of main mill and matched auxiliary equipment. All auxiliary equipment is optimally configured according to the main mill model, realizing automatic feeding, conveying, dust removal and discharging. The whole line adopts PLC intelligent control system, which can realize one-key start and stop and remote monitoring, greatly reducing manual operation intensity .

3. Core Advantages of MTW Trapezium Grinding Mill

Compared with traditional grinding mills, MTW Trapezium Grinding Mill has multiple technological and performance advantages, which are also the key reasons why it is favored by global customers. First of all, it adopts integral bevel gear transmission structure. Traditional grinding mills use split transmission, which is difficult to install and easy to produce noise and energy loss. The integral bevel gear of MTW Trapezium Grinding Mill has compact structure, stable transmission and higher energy utilization rate, reducing invalid energy consumption by about 15% . Secondly, the internal dilute oil lubrication system is a major highlight. Traditional grease lubrication has large resistance and high temperature rise, leading to short bearing life. MTW Trapezium Grinding Mill is equipped with a built-in oil pump, which realizes circulating lubrication of key bearings, with an oil change cycle of up to 4 months, reducing daily maintenance work . Thirdly, the curved air duct design effectively avoids material blockage. The curved tangential air inlet has small air flow resistance, and the materials are dispersed evenly in the air duct, solving the common blockage problem of straight air duct of old-fashioned grinding mills . In addition, the trapezoidal grinding roller and grinding ring increase the effective grinding area, improving the grinding efficiency by 20%-30% on the premise of the same power. The whole equipment adopts fully sealed design, matched with high-efficiency pulse dust collector, and the dust emission concentration is lower than 20mg/m³, reaching the world's strict environmental protection standards. Finally, the PLC intelligent control system simplifies the operation process, and workers can master the operation skills in a short time, effectively saving labor costs for enterprises.

4. Detailed Customer Application Case of MTW Trapezium Grinding Mill

We take a large building materials enterprise in Southeast Asia as the typical application case of MTW Trapezium Grinding Mill. The enterprise is mainly engaged in the production of limestone powder for concrete admixtures, and originally used traditional ordinary grinding mills. The old equipment had many problems: low single-hour output, serious dust pollution, frequent failure of wearing parts, high daily maintenance cost, and the fineness of finished powder was uneven, which could not meet the high-standard procurement requirements of downstream customers. After market investigation and equipment comparison, the person in charge of the enterprise finally chose Mascot's MTW178 Trapezium Grinding Mill complete production line in August 2025.

Mascot arranged professional engineers to carry out on-site survey for the customer, and customized the overall layout and equipment matching scheme of the production line according to the customer's plant area, raw material conditions and target output. The raw material processed by the customer is limestone with raw material particle size ≤40mm and raw material moisture ≤5%, and the required finished powder fineness is 250 mesh with stable output of 28-32 tons per hour. Our production department completed the production and debugging of all equipment within 18 working days. Then two senior installation engineers were sent to the customer's factory in Southeast Asia to guide installation, commissioning and worker training. The whole production line was officially put into operation 28 days after the equipment arrived at the site.

Up to now, this set of MTW178 Trapezium Grinding Mill has been running stably for more than 10 months. The actual operating data shows that the average hourly output reaches 31t/h, exceeding the customer's expected target. The fineness of finished limestone powder is uniform, with a pass rate of 99.6%, which fully meets the requirements of downstream high-end building material customers. In terms of energy consumption, the power consumption per ton of finished powder is reduced by 22% compared with the original traditional grinding mill. The supporting pulse dust collector runs efficiently, and the on-site production environment is clean without dust pollution, passing the local environmental protection inspection smoothly. In terms of maintenance, the wearing parts such as grinding rollers and grinding rings of MTW Trapezium Grinding Mill have a service life of more than 10 months when processing limestone, which greatly reduces the frequency of parts replacement and annual maintenance costs by 20%. The customer gave high praise to Mascot's MTW Trapezium Grinding Mill and our after-sales service, and signed a second set of MTW Trapezium Grinding Mill production line procurement intention agreement with us in April 2026 to expand production scale. This case fully verifies the excellent performance, stability and cost-saving advantages of MTW Trapezium Grinding Mill in large-scale non-metallic mineral powder production.

5. Related Equipment Recommendations

According to the matching use scenarios of MTW Trapezium Grinding Mill, Mascot recommends three supporting equipment for customers to form a complete crushing and grinding production line. First, Jaw Crusher: It is used for primary crushing of large raw ores, crushing bulk materials within 500mm to the feed size required by MTW Trapezium Grinding Mill (≤30-50mm), with high crushing efficiency and strong wear resistance. Second, Raymond Mill: As a classic low-cost grinding equipment, it is suitable for small-scale production lines with low output requirements, and can be used as an alternative model for customers with limited budget. Third, High-efficiency Pulse Dust Collector: It is a necessary supporting equipment for all grinding mills. Matched with MTW Trapezium Grinding Mill, it can realize 99.9% dust collection efficiency, ensure up-to-standard emission and create a green production environment. Customers can select supporting equipment of corresponding models according to their raw material size, production capacity and budget.

6. Frequently Asked Questions (FAQs) about MTW Trapezium Grinding Mill

Q1: How to adjust the finished powder fineness of MTW Trapezium Grinding Mill?
A: The fineness of finished powder of MTW Trapezium Grinding Mill is adjusted by the frequency conversion classifier on the top of the main mill. When you need finer powder, increase the rotating speed of the classifier impeller; when you need coarser powder, reduce the impeller speed. The whole adjustment process can be completed on the PLC control panel without shutting down the equipment, which is simple and efficient . It is recommended to adjust the speed in a small range each time, and check the finished powder quality after running for 5-10 minutes to ensure stable fineness.

Q2: What causes the low output of MTW Trapezium Grinding Mill and how to solve it?
A: The main reasons for the insufficient output of MTW Trapezium Grinding Mill include uneven feeding, serious wear of grinding rollers and grinding rings, insufficient air volume of the fan and blockage of the air duct. Corresponding solutions: First, check the vibrating feeder to ensure uniform and continuous feeding; second, inspect the wear degree of grinding rollers and grinding rings, and replace severely worn parts in time; third, check the fan operating status and air duct, remove blockages and restore normal air volume . Daily regular inspection and maintenance can effectively avoid the problem of reduced output.

Q3: What is the service life of wearing parts of MTW Trapezium Grinding Mill, and how to prolong it?
A: The core wearing parts of MTW Trapezium Grinding Mill are grinding rollers and grinding rings. When processing medium-hard materials such as limestone and calcite, the service life is 8-12 months; when processing high-abrasion materials such as quartz stone, the service life is 4-7 months. Methods to prolong the service life: strictly control the feed size to avoid hard iron impurities entering the grinding chamber; keep stable feeding volume to prevent idle running or overloading of the equipment; regularly check the dilute oil lubrication system to ensure sufficient lubricating oil .

About of Mascot

Zhengzhou Mascot Industry is a high-tech mining equipment company integrating R&D, manufacturing, sales, and after-sales service. Focusing on crushing, grinding, and mineral processing equipment, we provide professional solutions to our customers. We are ISO9001:2015、certified, and our products include mobile crushing palnts, crawler crushing plant,construction waste crushing plants, jaw crushers, sand making machines, cone crushers, fine crushers,grinding mills, ball mills, etc., all with reliable performance to meet diverse project needs.

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• Professional pre-sales support: Free project design and comprehensive solutions to help you accurately select the right equipment;

• Comprehensive on-site service: Providing installation guidance and worker training to ensure smooth equipment commissioning;

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