NT SERIES ULTRA-FINE ROLLER MILL
Introduction
The NT-Series Ultra-Fine Roller Mill is a new generation ultra-fine grinding system developed by Henan Innovative Industry, combining rolling, impacting, and grinding actions in a single integrated unit. It is specifically designed for the deep processing of non-metallic minerals with hardness below 7 Mohs and moisture content below 6%.
The NT-Series Ultra-Fine Roller Mill delivers finished product fineness adjustable from 325 mesh to 3000 mesh, with maximum fineness reaching D97 less than or equal to 3 microns, making it suitable for both standard fine grinding and high-precision ultra-fine powder production in a single machine.
The complete system consists of the feeder, main grinding unit, classifier, pulse dust collector, high-pressure blower, and electrical control cabinet, all integrated into a compact low-footprint system that can be commissioned quickly without large-scale civil construction.
Suitable Materials
Calcium carbonate, barite, talc, gypsum, calcite, limestone, calcium oxide, bentonite, dolomite, kaolin, graphite, carbon black, and similar non-metallic minerals with hardness below 7 Mohs and moisture below 6%.
Application Range
The NT-Series Ultra-Fine Roller Mill is widely used for the deep processing of non-metallic minerals across the following industries and applications:
Calcium carbonate and calcite ultra-fine powder production for plastics, rubber, paper, coatings, and adhesive industries. Barite and talc processing for drilling, paint, and cosmetic applications. Kaolin and bentonite processing for ceramics, paper, and chemical industries. Graphite and carbon black processing for battery, lubricant, and industrial material applications. General non-metallic mineral ultra-fine grinding for any application requiring consistent powder fineness in the 325 to 3000 mesh range.
NT-Series Ultra-Fine Roller Mill Structure
The NT-Series Ultra-Fine Roller Mill system consists of the following integrated components: quantitative feeder, main grinding frame, integrated classifier, high-pressure blower, connecting pipes and hoppers, electrical control cabinet, pulse bag dust collecting system, noise reduction silence room, and packing machine.
Working Principle
The frequency-conversion feeder delivers material evenly to the central area of the upper grinding plate. Under centrifugal force, the material moves outward to the grinding raceway where it is crushed and ground between the rollers and grinding rings. Material passes progressively through the first, second, and third grinding raceways, with each pass reducing particle size further.
After completing the third grinding stage, the high-pressure blower draws the ground powder upward into the classifier. The classifier wheel separates particles by size. Coarse particles that do not meet the fineness specification are returned to the grinding chamber for reprocessing. Fine particles meeting the specification pass through with the airflow into the cyclone collector, where they are separated and discharged through the discharge valve as finished product. Remaining air with trace dust is purified through the pulse bag dust collector before being discharged through the blower or silencer.
Main Grinding Unit:
Raw material enters the grinding chamber through the upper feed port and is ground between the rollers and grinding rings into powder. The ground powder is carried upward by the airflow. Qualified particles pass through the classifier wheel into the powder collecting system. Oversized particles fall back down for regrinding.
Powder Collecting System:
The reverse-pulse-jet bag-house collector supports individual filter bags on metal cages. Dust-laden air enters from the bottom and flows from outside to inside the bags. Filter bags are cleaned at timed intervals by short bursts of compressed air injection, dislodging accumulated powder into the storage hopper below. The system operates under PLC sequential control for fully automated continuous operation.
Control Panel Cabinet:
The electrical control system uses domestic top-level electrical components refined through over 20 years of field testing. The PLC control system delivers fully automatic operation with single-button start and stop. Operators adjust current and frequency settings to control output fineness across the 325 to 3000 mesh range, with all parameter adjustments visible on digital displays.
FLOW-CHART DIAGRAM
The NT-Series Ultra-Fine Roller Mill operates as a complete closed-circuit grinding and classification system. The flow chart below illustrates the complete material processing path from raw material feeding through grinding, classification, dust collection, and finished product discharge.
FEATURES AND ADVANTAGES
01.
Product Fineness 325 to 3000 Mesh in One Pass
The NT-Series Ultra-Fine Roller Mill achieves product fineness from 325 to 3000 mesh in a single grinding cycle, with maximum fineness reaching D97 less than or equal to 3 microns. This far exceeds the maximum 400 mesh fineness achievable by conventional Raymond Mills, making the NT-Series the preferred choice for applications requiring ultra-fine powder production.
02.
Higher Efficiency at Lower Investment Cost
Compared to ball mills, air-flow mills, and stirred mills producing the same fineness, the NT-Series delivers more than twice the fineness-to-efficiency ratio at lower investment cost and shorter processing time, significantly improving the economics of ultra-fine powder production.
03.
No Bearings in the Grinding Chamber
Unlike Raymond Mills, the NT-Series uses no bearings inside the grinding chamber. Instead, high-hardness wear-resistant materials developed by Henan Innovative Industry are used at all contact points. This eliminates oil consumption, prevents bearing burnout, and ensures reliable continuous operation with lower maintenance requirements.
04.
Compact Footprint and Fast Commissioning
The NT-Series requires no large-scale civil construction. Its compact design occupies minimal floor space, and the system can be put into production immediately after installation is complete, reducing project lead time and site preparation costs.
05.
Dust-Free and Low Noise Operation
The complete negative-pressure production system combined with a high-efficiency off-line pulse bag dust collector achieves dust collection efficiency of up to 99.9%, ensuring zero dust emissions during operation. The main grinding unit and air blower are each equipped with noise-reduction housings and silencers, meeting national environmental protection standards for noise and dust control.
06.
Proven Design Refined Over Two Decades
Continuous engineering improvements since establishment, with complete in-house manufacturing from materials through to final assembly. The NT-Series has become the industry benchmark for ultra-fine grinding in China and is widely referenced and replicated by other manufacturers, reflecting its established technical leadership in the field.
SPECIFICATION DATA
Specification data covers model dimensions, output capacity, motor power, and mesh-to-micron conversion reference for the NT-Series Ultra-Fine Roller Mill range. Final equipment selection is based on your specific material characteristics, required output fineness, and production capacity requirements.
Mesh, Output Capacity and Electrical Power Consumption.
Powder Size (Mesh & Micrometer).
MANUFACTURING GALLERY
Every NT-Series Ultra-Fine Roller Mill is manufactured entirely in-house at our Henan facility, from raw material fabrication through to final assembly and pre-delivery testing. The following images show our manufacturing process and quality control procedures.
Completed Project
NT-Series Ultra-Fine Roller Mill installation in the Philippines for calcium carbonate processing.
Keep all existing project photos as they are. These are excellent trust builders and should stay prominent on the page. Add brief text above each project section:
NT-Series Ultra-Fine Roller Mill project in Tanzania for mineral powder production.
NT-Series Ultra-Fine Roller Mill installations across mainland China covering calcium carbonate, kaolin, and non-metallic mineral processing applications.
Looking for an Ultra-Fine Roller Mill for Your Operation?
Tell us your material type, required powder fineness, and production capacity. Our engineering team will recommend the right NT-Series Ultra-Fine Roller Mill configuration for your operation.