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Grinding mill clarification

Technical advantages of grinding mill:
1. The grinding mill of HGM is high efficient (twice as much as jet mill, mixing grinder and ball mill)
2. The spare parts of grinding mills can serve much longer time (2-3 times longer than that of impact mill or turbo mill.
3. High safety and reliability of the ultrafine mill (no rolling bearings and screws in the grinding cavity, so no problems caused by the wear of bearings or screws)
4. The HGM Grinding mills are characterized by high fineness (final size: 325-3000 mesh, D97<5 micron)
5. Environment-friendly
Points to be confirmed from supplier
  1. Suitability of the grinding mill for Sulphur (Flammable and explosive): Is this grinding mill suitable for such service?
  2. Recycling of N2 in close loop for grinding under inert atmosphere to maintain the Oxygen content below 8%. : Is offered mill system offered for close loop one and work with nitrogen?
  3. N2 consumption: Nitrogen is used to pulse bags in filters as well some nitrogen is injected in mill body: Does offered mill have provision for this?
  4. Achievable Grinding rate for retention of maximum 1.0% on 230 mesh : specify
  5. Particle size analysis for sulphur grinding (Required 50% passing of 20 micron and 90% passing 50 micron : specify
  6. MOC of all equipments and ducting in contact with sulphur: Bull ring and roller faces are alloy or manganese steel, rest of AISI 304.
  7. Air blower size, conveying velocity to cyclone and filter are to be specified. As well Air cooling system for grinding at low temperature (25 Deg) is required. We have brine at 0-5 deg c.
  8. Operating pressure for the grinding circuit. : Supplier to specify pressure as positive or negative atmosphere.
  9. Power consumption of each drives. All electrical to suit power supply per Indian standard. Control voltage shall be 110 V ac, 50 Hz. 
  10. Specify all instruments and PLC for automatic operation of grinding mill system

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