{"id":9941,"date":"2026-07-24T13:18:27","date_gmt":"2026-07-24T05:18:27","guid":{"rendered":"https:\/\/www.clirik.com\/?p=9941"},"modified":"2026-07-24T13:18:29","modified_gmt":"2026-07-24T05:18:29","slug":"air-classifying-mill-machine-maximize-fine-grinding","status":"publish","type":"post","link":"https:\/\/www.clirik.com\/ar\/air-classifying-mill-machine-maximize-fine-grinding\/","title":{"rendered":"\u0622\u0644\u0629 \u0627\u0644\u0637\u062d\u0646 \u0628\u0627\u0644\u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u0647\u0648\u0627\u0626\u064a: \u062a\u062d\u0642\u064a\u0642 \u0623\u0642\u0635\u0649 \u0642\u062f\u0631 \u0645\u0646 \u0627\u0644\u0637\u062d\u0646 \u0627\u0644\u062f\u0642\u064a\u0642"},"content":{"rendered":"
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If you want to keep the powder particle size below 10 microns, air classification mill (ACM) is an essential weapon. It not only relies on the internal high-speed mechanical rotor to smash the materials violently, but also comes with a dynamic grading wheel to accurately control the discharge thickness. Many workshop directors feel that it is common for 10% to 15% of the materials to be lost due to \u201cover-crushing\u201d in the crushing process. But in fact, as long as you adjust the energy consumption ratio and the \u201cgrading wheel\/rotor speed ratio\u201d clearly, this part of the lost output can be completely rescued, and the problem of heat-sensitive materials being heated and deteriorated due to 1 grinding can also be solved. Let\u2019s take a 1 to pick up the hard core parameters that determine the production capacity.<\/p>\n\n\n\n

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F. I .N.E. Parameter tuning method: stop tuning blindly by feeling.<\/h2>\n\n\n\n

To play with the air classification mill, one must understand both machinery and aerodynamics. If you just stare at the rotor speed and adjust it blindly, the batches that come out must be thick and thin. Factory directors who can really achieve 99% of the first-time pass rate are using this \u201cF.I.N.E.\u201d tuning method to calibrate the equipment.<\/p>\n\n\n\n

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  • Flow (air flow\/gas-solid ratio): The air volume determines the cutting particle size accuracy of the mill. The wind is small, the material is all held in the crushing area can\u2019t get out, the machine immediately has a fever. The operator must stick to the minimum gas-solid ratio of 3:1 (weight ratio) to ensure that once the powder reaches the target fineness, it can be immediately pumped to the grading wheel by the wind.<\/li>\n\n\n\n
  • Impact (impact\/rotor linear velocity): the kinetic energy of crushing depends entirely on the beating column on the rotor. For hard minerals, the linear speed must soar to more than 110 m\/s; but if you are working on raw materials (APIs) that are afraid of heat, it is best to honestly press the linear speed below 70 m\/s. Once the line speed exceeds the standard, the particles will be smashed to pieces, resulting in 1 piles of sub-micron waste powder, which will eventually be blocked in your downstream dust removal system.<\/li>\n\n\n\n
  • Navigation (guide\/grading wheel blades): The geometric design of the grading wheel directly determines the maximum particle size (D90). The faster the wheel turns, the greater the centrifugal force, and the coarse particles will be thrown back to the crushing zone for reconstruction. Remember, the gap between the grading wheel blade and the fixed wind deflector must be stuck within 1.5mm. If it is slightly larger, the coarse powder will leak.<\/li>\n\n\n\n
  • Extraction (suction\/negative pressure difference): The amount of air induced by the system is the lifeblood of maintaining the entire air circulation. The induced draft fan at the tail must establish a negative pressure as stable as an old dog (usually between -1500 and -2500 Pa) inside the pulverizer housing. As long as this negative pressure gauge jumps around, the thickness of the powder you finally put into the bucket must be uneven.<\/li>\n<\/ul>\n\n\n\n