Since October 2025, a complete intelligent coal dry separation project constructed by Meiteng Technology in Mongolia has maintained stable operation, it says further demonstrating the significant advantages of its independently developed DCP Full-Size Coal Dry Separation Dream Plant technology, for which the company owns full intellectual property rights, in adapting to harsh climatic conditions while achieving coordinated improvements in coal quality, energy efficiency, water-free processing and intelligent operation optimisation.

The project is located in Mongolia’s Gobi region, where winters are long and extremely cold, with temperatures dropping to as low as -30°C, while summer surface temperatures can soar to 42°C. The area also experiences frequent strong winds and recurring sandstorms throughout the year. Evaporation far exceeds precipitation, making industrial water resources extremely scarce. Leveraging its independently developed intelligent dry separation technology, Meiteng Technology says it successfully addressed these challenges.

The entire system operates without using water as the separation medium, eliminating dependence on scarce water resources. While significantly reducing environmental impact, the process combines high-precision sensor-based detection with intelligent control systems, demonstrating outstanding adaptability and operational reliability under extreme conditions such as heavy dust, strong winds and large temperature fluctuations. The project Meiteng says has successfully achieved its optimisation goals of “quality improvement, energy reduction, water conservation, and rapid construction,” providing a reliable solution for coal separation in arid and water-scarce mining regions worldwide.

Due to local resource conditions, the raw coal processed by the project had relatively high ash content and unstable quality. Some low-grade coal contained 60-80% dilution, which had long limited its commercial value and utilisation potential. The commissioned full-size particle intelligent dry separation system for this project adopts a process configuration of TDS® separation for the 200-25 mm fraction, TGS® separation for the 25-3 mm fraction, with the -3 mm one bypassed.

Through this integrated process, low-grade contaminated coal previously considered difficult to market due to its high impurity content is upgraded into high-quality coal products that meet market requirements. The system significantly improves the added value and utilisation efficiency of coal resources, transforming materials once regarded as waste with little or no market value into commercially viable coal products, thereby creating substantial economic benefits for the client.

The TDS® (intelligent sensor-based dry sorter) and TGS® (intelligent gradient-fluidised dry separator) were independently developed by Meiteng Technology. Since their commercial launch in 2016, more than 520 units have been deployed worldwide. The maximum processing capacity of a single unit has reached 600 t/h (taking 300-50 mm lump coal feeding for example), supported by extensive coal separation data models covering virtually all coal types.

The TDS® is designed for the separation of +25 mm lump coal, with a maximum separation size of up to 300 mm. The system utilises dual-source recognition combining X-ray and CCD imaging technologies, together with compressed-air jet separation for multi-mineral particles. Meiteng says it has maintained the No 1 market share in China’s coal industry for years and ranks among the leading technologies in the global coal separation market.

The TGS® is designed for coal separation in the -80 mm to 3 mm size range. The technology integrates air jigging, X-ray detection, and feedback control technologies, with a maximum single-unit processing capacity of 600 t/h (taking 25-3 mm coal feeding for example). The wide application of these two technologies has significantly promoted the green and intelligent development of coal separation technology worldwide.

Since trial operation started in October 2025, Meiteng says the system has consistently delivered stable and outstanding performance, including system processing capacity continuously maintained above 285 t/h; coal misplace rate in rejects kept below 3%; calculated gangue discharge rate on feedings exceeding 95%; plus the calorific value of the blended clean coal product increased by approximately 2,200 kcal/kg compared with raw coal, while ash content was reduced by 25-28%. Both the TDS® and TGS® achieved fully automatic operation with adaptive response to fluctuations in feed quality.

Compared with conventional dry separation methods, Meiteng says its intelligent dry separation system offers three core advantages: high separation accuracy, strong equipment reliability and advanced intelligence. “The system overcomes the limitations of traditional dry coal preparation plants, which often require frequent manual adjustment and control, involve heavy equipment maintenance workloads, and struggle to maintain long-term stable operation. By enabling intelligent and stable operation, the system creates a more efficient and user-friendly working environment for on-site production management personnel while significantly reducing the operating and maintenance costs of the coal preparation plant.”

The project was designed with a processing capacity of 285 t/h, an annual throughput of 1.5 Mt/y, and a maximum annual processing capacity of 2.0 Mt/y. The entire system consists of three main modules: ROM hopper and primary crushing module, screening and TDS module and TGS module, together with a bulk stacking and handling system. Auxiliary facilities include four additional units: power generation unit, compressed air unit, MCC and control room unit and dust collection unit. The plant incorporates a total of 27 process equipment units, with an installed capacity of 1,777 kVA, hourly power consumption of 1,046 kWh, and a total footprint of approximately 18,000 m².

Featuring a simplified process flow, a limited number of equipment units, all-steel structural construction, and a modular layout, the system requires relatively small installation space and enables rapid deployment. In addition, it requires minimal operational and maintenance personnel and allows easier on-site management, making it particularly suitable for construction and operation in remote areas.

To fully leverage the strengths of both parties, the project adopted a China-Mongolia joint execution model. Meiteng Technology was responsible for design, manufacturing and procurement, cross-border logistics, and full-cycle technical services, while the Mongolian owner undertook civil construction, installation works, and overall project management.

Meiteng: “Through efficient coordination and professional collaboration to bridge cultural differences, both parties developed multiple tailored construction strategies in advance based on site conditions and dynamically adjusted execution plans in response to weather variations. Technical discussions and safety trainings were regularly organised to ensure continuous efficiency in both manpower and equipment deployment.”

Approximately 725 t of materials were transported over a distance exceeding 1,900 km and cleared through cross-border logistics and customs without any errors. At the same time, the owner allocated sufficient resources to ensure robust on-site HSE management and personnel logistics support, achieving zero lost-time injuries throughout the entire construction period.

Published Date:2026-05-25