The inert gas-protected ultrafine grinding system uses inert gas as the grinding medium for airflow pulverization to achieve ultrafine grinding of dry materials.JZDBThe series can be used for crushing and classification in a closed-loop system with inert gases, suitable for classifying materials that are highly prone to combustion, oxidation, or explosion. Examples include carbonyl iron powder, nickel powder, tungsten-cobalt alloy powder, refined selenium powder, and sulfur. The inert gas is recycled back to the compressor's suction inlet for reuse. With low gas consumption and high automation, it is ideal for various oxygen-sensitive and reactive materials. Feel free to contact us for further discussion and to request detailed equipment documentation.。

JZDBThe inert gas-protected jet mill classifier is developed based on the fluidized bed jet mill classifier, using nitrogen or carbon dioxide as the grinding working medium. It consists of a nitrogen compression system, nitrogen filtration system, grinding system, classification system, collection system, feeding and discharging system, nitrogen purity testing and replenishment system, nitrogen generation system, and electrical control system. The manufacturing process of the complete set of equipment is our company's mature technology, ensuring reliable quality and stable performance. It has been widely used in the processing of metal powders, easily oxidized materials, and flammable and explosive materials.

Equipment Features

The entire production line operates in a fully enclosed negative pressure circulation system, with most components adoptingPLCProgrammatic control minimizes human intervention and operational factors. The control cabinet can be placed in a separate control room at a distance. Automatic packaging machines are used for packaging and discharging, while monitoring cameras are employed for on-site observation, enabling fully unmanned operation.

In terms of safety,JZDBThe inert gas protection grinding and classifying machine mainly has the following features:
1, Oxygen Isolation: Before starting the equipment and feeding materials, first use nitrogen to replace the air in the closed circulation system. At the same time, the closed feeding and discharging system can use nitrogen to replace the small amount of air brought in during the feeding and discharging processes, maintaining a basically stable oxygen content within the system.
During the process, an oxygen content tester continuously monitors the oxygen level in the airflow. When it exceeds a certain threshold, nitrogen is immediately supplemented to keep the oxygen content consistently within the safety production standards.
2Control of Dust Concentration: The feeding system integrated with the equipment is a fully enclosed, constant-speed device, programmed and controlled by the control cabinet. The full enclosure serves to isolate oxygen, while the constant speed regulates the concentration of materials introduced into the equipment. The feeding speed can be arbitrarily set.
Materials added at a constant speed into the equipment may accumulate inside, compromising safety. Therefore, the equipment's shape—such as the bending angle of pipes and the design of various components—is scientifically calculated to eliminate dead corners within the equipment. Additionally, driven and scoured by high-speed airflow inside the equipment, powder materials will not accumulate in the pipes.
3Timely release of static electricity and elimination of ignition sources: The pulse-jet reverse cleaning collector uses special filter media with carbon steel wire to promptly eliminate static electricity while ensuring thorough and clean pulse dust removal. The equipment is constructed entirely of metal components, all grounded, to maximize the dissipation of powder static electricity.
4Circulating Air Cooling: Since the entire system operates as a closed-loop circulation system, multiple moving parts inside the equipment generate a certain amount of heat during high-speed operation, and temperature is critical to safety during processing. Therefore, a finned cooler is installed on the pipeline of the equipment, which effectively reduces safety risks caused by prolonged operation or work in high-temperature environments.
5Explosion-proof: The entire system is equipped with explosion-proof holes at various positions along the pipeline. In the event of a deflagration or explosion caused by excessive internal pressure or concentration levels, these holes minimize losses to the lowest possible extent.
All motors and devices used in the entire system are explosion-proof motors, offering better sealing performance and effectively reducing dust accumulation.
6Emergency Shutdown: The emergency shutdown trigger switch is connected to the oxygen content tester. If the oxygen concentration monitored by the oxygen content tester fails to reach the preset value within the predetermined time, an emergency shutdown is triggered. The equipment stops feeding, the induced draft fan shuts down, the classifier shuts down with a delay, and the nitrogen replenishment system continues to operate until manually shut down.

Technological process

Application Areas

Currently widely used in **research institutes, metal powder processing, pharmaceutical ultrafine powder, and other fields**, its manufacturing process is based on our company's mature technology, ensuring reliable quality and stable performance. It has been extensively applied in the processing of metal powders, easily oxidized materials, and flammable and explosive substances. Typical materials include: cobalt powder, tungsten powder, iron powder, nickel powder, tantalum powder, selenium powder, fine spherical aluminum powder, neodymium iron boron, carbonyl iron powder, selenium powder, etc.……

Main Technical Parameters

Equipment Display