Superheated Steam Jet Mill

Superheated Steam Jet Mill
Superheated Steam Jet Mill
Superheated Steam Jet Mill
Superheated Steam Jet Mill
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Using superheated steam as the grinding gas, improved energy efficiency

Using superheated steam as the grinding gas, improved energy efficiency

  • Superheated steam source providing high energy utilization rate and low operating cost
  • Grinding particle size range D50: 0.5-10 μm
  • Revolutionary innovation of dry grinding technology
  • Improved energy efficiency, low carbon, energy saving and environmental protection for plants
  • Applicable: bulk solid wastes such as steel slag, slag and fly ash; non-metallic minerals such as calcium carbonate, talc and quartz; new materials such as lithium carbonate, lithium iron phosphate and precipitated silica.
How it works

As an upgraded version of the conventional jet mill, the superheated steam jet mill utilizes a unique high-temperature mechanical sealing technology and cooling technique. High-temperature steam is used as the kinetic energy source to propel materials to collide and grind at an accelerated speed through a specially designed Laval nozzle. After being ground, the materials undergo cyclone classification, at which point a heat preservation collection system collects the qualified powders while any coarse particles fall back into the grinding chamber. The entire process is achieved without using any liquids.

Advantages
  • Producing nanometer-size powders under a dry process
  • Superheated steam source creating a working pressure between 8-40 bar and steam temperature between 230-360 ℃, which can also dry the powder with heat
  • High jet velocity provides high kinetics and strong grinding force with nozzle outlet velocity up to 1020 m/s, suitable for finer powder production
  • Low viscosity of steam makes it easier to obtain finer powders
  • Full self-grinding of the material, ensuring product purity and wear resistance of the mill
  • High speed and low dynamic viscosity increase grinding efficiency and classification accuracy while reducing over-grinding
  • Good particle shape with high activity
  • Classifier wheel automatically separates materials through airflow, preventing coarse particles from discharge
  • Key components such as lining, classifier and nozzle are made from ceramic materials (e.g. Alumina, zirconia, or silicon carbide) for zero contact with metal during the whole grinding process
  • The classifier rotor can be installed horizontally or vertically; more rotors available
  • Rotor speed adjustable by frequency conversion allowing flexible particle size distribution adjustment
  • Closed loop system, reducing dust and noise and creating a clean production environment
  • PLC control system, easy to operate
  • Can be used for superfine processing of high-viscosity products
  • Motor connection via belt improves rotating speed
  • Multi-stage classifier optional, allows the production of multiple particle sizes at one time
  • Precise weighing control system available. ensuring product stability and consistency
  • Explosion-proof design or nitrogen circulation upgrades optional, to meet ultra-fine grinding requirements for flammable, explosive or easily oxidized materials
Technical Parameters
Parameter (S-MQL/W)
2000
3000
4000
6000
10000
15000
20000
Steam consumption (kg/h) 1000~2000 1500~3000 2000~4000 3000~6000 6000~10000 10000~15000 15000~20000
Steam pressure (bar) 5~40 5~40 5~40 5~40 5~40 5~40 5~40
Temperature (℃) 260~360 260~360 260~360 260~360 260~360 260~360 260~360
Production capacity (kg/h) 400~1000 600~1500 800~2000 1200~3000 2000~5000 3000~8000 4000~10000
Product size (D50:μm) 2~10 2~12 2~12 2~14 2~14 2~16 2~16

Note: The particle size, specific gravity, hardness, and moisture of raw materials are all closely associated to the production capacity. These parameters should only be used as a reference; for more detailed information please consult our engineers.

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