China Best Cryogenic Grinding System & Air Classifying System

China Best Cryogenic Grinding System & Air Classifying System

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3d cryogenic grinding systemcryogenic grinding system with feederair classifier


This is full auto liquid nitrogen Cryogenic Grinding and classifying system. The whole procedure is PLC automatic control, equipment process is divided into debag station, vacuum feeder, cryogenic grinder, multichannel airflow classification. This system can be grinding and automatic classification of different particle size of powder, to meet customer demand of different powder size for different purpose. This system is applicable to reach the requirement of grinding to more than 200 mesh powder.

Cryogenic Grinding System Sketch 

 The TM series cryogenic pulverizer adopts the external media freezing method, which is a smashing technology for solving the problem that the material that cannot be pulverized at normal temperature is frozen by the foreign matter. The heat is exchanged by the cold source of liquid nitrogen, compressed air, air conditioner, and the like.

      The principle of pulverization: heat exchange is carried out by using cold source and material; the material is cooled to the embrittled state; the embrittled material is subjected to numerous crushing, shearing and rubbing in the pulverizing chamber through the pulverizing mechanism, and finally becomes fine granules, pulverized. The fineness of the material can reach the micron level (600~2000 mesh). The cold option can be selected according to the performance of the material. If the liquid nitrogen is used as the refrigerant, the minimum cooling temperature can reach 196 degrees below zero. The cooling rate is very fast, and it is preferred for some materials that require rapid cooling and low embrittlement temperature. Coolant. For materials with low cooling embrittlement temperature, the compressed air or the pre-cooled air of the air conditioner can be used to exchange heat with the materials.

      Structure and composition:

      1. The low temperature cryogenic pulverizer uses a pre-cooling silo to pre-cool the material, and the pre-cooling silo is equipped with a precision liquid gas gasification device to forcibly cool the material during the liquid gas gasification process.

      2. The material that has reached the cooling and embrittlement is sent to the crusher chamber by a screw feeder.

      3. The independent rolling pair ensures that the machine operates normally in a low temperature environment. The refrigerant refilling compensation compensates for the heat generated by the material during the pulverization process. The injection amount of the refrigerant is regulated by the low temperature valve, and the high pressure airflow generated when the material is pulverized is The flow of the refrigerant lost pressure expansion is discharged into the machine cavity through the swirling window of the static classifier of the pulverizer. After the material is pulverized, the required fineness is achieved and the airflow enters the discharge system, and the coarse material hits the stationary classifier blade and bounces back to the pulverizer cavity to achieve the coarse step grading effect.

      4. Discharge traction system: The material crushed by the main machine is discharged to the host through the pipeline by air traction.

      5. Internal airflow classification: The material is sent to the external classifier together with the inflated airflow through the induced draft fan to adjust the speed of the classifier impeller, which can achieve the fineness we need. The use of the internal classifier reduces the time for the material to return to temperature during the screening, reduces labor, shortens the production cycle, and reduces the use of the site. The crushed material can be directly packaged and transported. The customer can select the internal sieve type classification method according to the actual needs; this method is suitable for the ultra-fine powder classification, and the material-free classification above 200 mesh achieves the perfect effect, and the cold source is fully utilized.

      6. Internal sieve grading method: The internal mesh grading method is grading by means of grading the power screen installed in the system. It is the same as the internal gas flow classification method, which is suitable for our particle classification below 200 mesh.

      7. After classification, the coarse material is fed into the feeding mechanism through the pipeline and then re-pulverized into the pulverizer. The fine material enters the cyclone separator. The cyclone separator separates the material from the air, and the material is deposited by rotation on the bottom of the cyclone separator.

      8. Return booster pump: The return gas of the general machinery in the production process is that most of the cold source will flow out to the discharge port with our finished products. We use a backflow booster pump to collect the return air and repressurize the input system front area. The booster pump output power is adjusted to achieve the balance of the discharge port, which makes the most efficient use of the cold source.

      9. Reflux air supply and reuse system: The sanitary pipeline and valve are used to transport the return gas. When the upper part of the cold storage tank is input to the upper part, the material is cooled and the air is supplied to the host. Valves are installed in each functional area for adjustment.

      10. The inclined angle discharge system is used for discharging, and the inclined spiral discharging system ensures that the air of the cyclone does not flow out from the discharge port.

      11. The gas mixture containing the rare material particles flowing out from above the cyclone separator re-enters the second cyclone separation, and finally separates the air flow having a certain cold source effect through the pipeline to the feed inlet of the crusher main engine.

      12, electrical control: the use of full-conversion power supply, control the motor speed in each region, to achieve a wide range of feed speed adjustment; host line speed adjustment (crushing different materials, to achieve different particle state requires different first speed), adjust airflow traction Power; reflow boost power adjustment; discharge speed adjustment and other effects.

      13, automatic control system: customers can use PLC to control the balance of each system as needed. The external control host is relieved of the pressure boost function, and the liquid nitrogen flow rate is adjusted according to the set region temperature. The input speed is adjusted according to the current of each zone, and the frequency of each zone is memorized. The memory function can memorize the parameters required to smash various materials and input them into the computer. At the same time, the 30 kinds of material pulverization parameters can be memorized without using the external expansion interface.


      The machine adopts a high-performance liquid gas gasification device to exchange heat between the refrigerant and the material during the gasification process, and collects the remaining cold air by means of a reflux method. Each part uses a pipeline valve to adjust the air compensation of the reflow air to the crusher chamber. The pre-cooling, closed conveying, closed grading, discharge recirculation, refrigerant usage rate, power source mechanism, and smashing transportation process have achieved the best results. In terms of energy consumption has reached the international leading level!


      For materials that require rapid cooling and rapid temperature rise, we use vacuum pre-cooling and vacuum heating method to rapidly cool the material by uniformly sprinkling the material into the vacuum pipe and introducing the refrigerant into the vacuum pipe. When the temperature rises, the high-altitude pipe is used to fall into the pipe and dry. The method of hot air is rapidly heated, and this method has a unique effect on ultrafine pulverization of nutraceutical articles. The user can increase the selection of the final room temperature classification method to classify the coarse materials that are mixed in the fine powder.

      Application area:

      1. Chemical and coating fields: metal wall coating: Teflon, PA, PC, PU, ​​PP, PE coating powder; plastic coating: cement coating, high bonding coating; silent coating: elastomer , nano-absorbing coating; anti-corrosion coating; ultra-fine pulverization of raw materials used in absorbing coatings. It has reached the international advanced level in the primary color pulverization process (natural masterbatch pulverization).

      2. In the field of food and health care products: the crushing of plant fruits, animal and plant extracts, proprietary Chinese medicines, natural and synthetic elements can ensure that the original elements are not lost during the pulverization and drying process.

      3, recycling areas: low melting point plastics, high self-lubricating materials, waste rubber, raw collagen glue low temperature pulverization.

This series of machinery belongs to the micro-powder technology, which is used in polymer materials such as polypropylene, polyethylene, polycarbonate, polyamide, polytetrafluoroethylene, ABS, elastomer, raw rubber, rubber, phenolic, polyester, etc. Smash to 100~600 mesh. For high water content, such as: animal and plant extracts, proprietary Chinese medicines, synthetic fibers, seaweed extracts, etc.; special materials for strong fibrous materials, animal placenta, honeycombs, body fluids. It is widely used in polyester powder coatings, and the use of sheep placenta oral capsules is a major breakthrough.

      Crushing consumption: The pulverization of the polyester powder has achieved the desired effect on liquid nitrogen consumption. (For example, type 50) The liquid nitrogen consumption during pulverization is 300~10000L/ton (depending on the properties of the crushed materials), the electric energy consumption is 50~400 kWh/ton, and the mechanical wearing parts are 10~30 yuan/ton. Due to differences in material properties and comminution requirements, energy consumption is different during the comminution process.

      Mechanical automation: The machine uses a microcomputer to control the mainframe supply and nitrogen supply. The microcomputer control system automation level can be set according to the customer's needs. The user only needs to set a parameter point of the discharge fineness value. Based on this parameter point, the intelligent control system passes the host current, the chamber pressure, the pipeline flow, The material temperature automatically adjusts the power frequency of each point, the size of the refrigerant valve, the air compensation valve, the discharge speed, and the heating system to achieve intelligent control.

      Outlook: TM series Cryogenic Grinding System overcomes the problem that special materials can not be pulverized at normal temperature. It reduces the disadvantages of traditional frozen pulverizer consumption by cooling backflow, discharge air compensation, and system grading. It is advanced at home and abroad. The crushing machine has filled the blank of such technology at home and abroad and is an indispensable tool for the crushing process of materials.

      Series machinery: The company also has horizontal YM series single-stage large-scale pulverizer, UTM series double-stage accelerated pulverizer, UTM series adopts host bipolar acceleration, traction and pulverization integrated design, and is the most advanced low-temperature cryogenic pulverizer at home and abroad. 




            China Patented Cryogenic Grinding System/Cryogenic Grinder/Cryogenic Miller

Main Motor
Theoretical Output
200mesh 100kg/h
200mesh 250kg/h
200mesh 400kg/h
Cooling Medium
-196°C-0°C LN
-196°C-0°C LN
-196°C-0°C  LN
Classifying Motor Power




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