NT SERIES Grinding Mill
The Upgraded Alternative to Traditional Raymond Mill Technology
Introduction
The NT-Series Grinding Mill is a new generation roller-type grinding mill designed as a significant upgrade over traditional Raymond Mill technology. It delivers higher grinding efficiency, lower power consumption, and substantially improved performance compared to conventional Raymond Mill designs of equivalent size.
Key improvements over traditional Raymond Mills include increased roller and ring height for greater grinding capacity, a larger shovel design for improved material feed efficiency, and a maintenance-free roller assembly based on coal machine DF design principles that extends the grease feeding interval, reduces maintenance downtime, and improves overall production capacity.
The NT1700 Grinding Mill is the first large-format Raymond Mill of its type developed in China. Compared to the traditional 5R Raymond Mill, the NT1700 delivers 2.5 to 4 times higher production capacity, making it the preferred choice for large-scale powder production projects requiring high output with reduced energy costs.
Production Capacity
30 to 40% higher than traditional Raymond Mill with equivalent power consumption.
Power Saving
30% less power consumption per ton of finished powder compared to traditional Raymond Mill.
APPLICATION RANGE
The NT-Series Grinding Mill is suitable for grinding any non-metallic mineral with hardness below 7 Mohs and moisture content below 6%. It is widely used across building materials, mining, chemical, and metallurgy industries for processing the following materials:
Limestone, calcite, activated carbon, talc, dolomite, titanium dioxide, kaolin, bauxite, marble, feldspar, barite, fluorite, gypsum, ilmenite, phosphorite, clay, graphite, diabase, gangue, wollastonite, quicklime, silicon carbide, bentonite, manganese ore, iron ore, chrome ore, quartz, and similar materials.
Output fineness is adjustable from 0.18 mm (80 mesh) to 0.038 mm (400 mesh), covering a significantly wider range than traditional Raymond Mill designs.
FEATURES
The NT-Series Grinding Mill incorporates a new-type reducer that allows mill rotation speed to be adjusted according to client production requirements, optimizing capacity and fineness output for different materials and applications.
The classification system uses a cone-shaped turbine classifier with a large-diameter fan, improving classification precision and air throughput area. This design delivers finer and more consistent particle size separation compared to conventional Raymond Mill classifier designs.
The NT1700 model represents a breakthrough in large-format Raymond Mill design in China. Its capacity of 2.5 to 4 times that of traditional 5R Raymond Mills makes it the most effective choice for high-volume powder production operations where maximizing output while controlling energy costs is the priority.
NT-SERIES GRINDING MILL STRUCTURE
The NT-Series Grinding Mill system consists of the following integrated components: feeder, classifier, blower, connecting pipes and hoppers, control cabinet, and dust collecting system.
The main grinding frame includes the base, central shaft support, grinding ring, spider-arm assembly, roller assembly, main shaft, shovels, shovel seat, housing, and drive system. The grinding ring and rollers are manufactured from high-hardness wear-resistant materials for extended service life.
The drive system uses a reducer and double-motor configuration. The classification system uses a cone-shaped turbine classifier with a large-diameter fan for precise particle size separation.
Multiple feeding and conveying system configurations are available to suit different material characteristics. The dust collection system is available in two configurations: closed-circuit cyclone plus pulse-jet collector, or open-circuit pulse-jet collector only. The control system supports both fully automatic PLC control and manual control depending on client preference.
Working Principle
Raw material is first crushed by a jaw crusher to the required feed particle size, then elevated by a bucket elevator to the feed storage hopper. The vibration feeder delivers crushed material at a controlled and consistent feed rate into the grinding chamber of the main unit.
Inside the grinding chamber, three rollers suspended from the spider-arm rotate around the central shaft under centrifugal force, pressing tightly against the inner surface of the grinding ring. The rotating shovels lift material from the base of the grinding chamber and feed it between the rollers and ring where it is ground into powder.
Ground powder is carried upward by the airflow into the classifier. Coarse particles that do not meet the fineness specification fall back down to the grinding chamber for reprocessing. Qualified fine powder passes through the classifier and enters the cyclone collector where it is separated from the airflow and discharged through the discharge valve as finished product.
The remaining air stream, carrying trace dust, is directed through the pulse-jet dust collector for purification before being returned to the blower. The system operates as a closed-circuit airflow loop, improving workshop conditions and preventing powder emissions into the working environment.
TECHNICAL ADVANTAGES AND FEATURES
01.
Reliable Performance and Stable Operation
Advanced grinding system design with improved structural geometry delivering the lowest vibration and noise levels in its class. Smooth, stable operation with proven social and economic performance benefits across years of field deployment.
02.
40% Higher Capacity with 30% Lower Power Consumption
More material is ground between the roller and ring per unit of time compared to traditional Raymond Mills. Production capacity is 40% higher than traditional Raymond Mills with equivalent power consumption, and power consumption per ton of finished powder is reduced by 30%, delivering significant operating cost savings across high-volume production operations.
03.
Dust-Free Operation Meeting Environmental Standards
The pulse-jet dust collector for auxiliary air discharge achieves dust collection efficiency of 99.9%. The main frame positive pressure sealing system ensures no powder floating in the workshop environment, fully meeting national environmental protection standards for industrial powder processing facilities.
04.
Extended Maintenance Intervals and Easy Ring Replacement
The newly designed sealing structure allows the roller assembly to operate continuously for 300 to 500 hours without requiring additional lubrication. The grinding ring can be replaced without removing the roller assembly, significantly reducing maintenance downtime and simplifying servicing procedures.
SPECIFICATION DATA
Specification data covers model dimensions, production capacity, motor power, and fineness range for the NT-Series Grinding Mill range. The 3D plant layout images illustrate typical complete grinding plant configurations. Final equipment selection and plant layout are determined based on your specific material characteristics, required output fineness, and production capacity requirements.
Remarks: The power can be adjusted according to the client’s requirements.
Looking for a High-Capacity Grinding Mill for Your Operation?
Tell us your material type, required powder fineness, and production capacity. Our engineering team will recommend the right NT-Series Grinding Mill model for your operation and provide a detailed technical proposal.