Inert Gas Protection Jet Mill System

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Inert Gas Protection Jet Mill System
Posting date : Apr 15, 2008
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84-
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PRINCIPLE:   Inert Gas Protection Superfine Pneumatic Jet Mill Unit uses inert gas as media for the pneumatic milling to perform dry-process superfine pulverization. The unit mainly consists of compressor, air storage tank, material storage tank, jet mill, cyclone separator, collector and automatic controller. When the unit is activated, inert gas will be released into the unit through the air storage tank to drive the air out till the whole unit reaches the numerical value fixed by the oxygen detector. Then the unit will automatically start the material feeding device to feed the materials evenly into the milling chamber of the jet mill. The compressed inert gas is injected at a high speed into the milling chamber by means of special ultrasonic nozzle. Therefore, the materials will be ground by being accelerated, impacted and collided repeatedly in the midst of ultrasonic injection flow. The ground materials will be brought together with up flow to the grading chamber. The centrifugal force and the gravity produced by the fast rotation of grading rotator together with the centripetal force produced by the up flow will act on the grading grains. As the centrifugal force on the coarser grains is greater than the centripetal force, they cannot enter the grading wheel and will be swirled backed into the milling chamber for further milling. The thinner grains will enter the grading wheel and be blasted to cyclone separator and collector whereas the inert gas will return to the compressor, through which it will be compressed for recycling . FEATURES: 1, Wide application: different inert gas can be used as the media to suit the particular flammable and explosive material. 2, The recycling of inert gas causes little loss. 3, The content error of inert gas can be controlled within 1PPM, while the content of oxygen can be fixed at any rate. 4, Endurance: Since the milling effect only involves the impact and collision among the grains rather than the collision with the wall, it is applicable to materials with Mush's Hardness above Grade 9. 5, Wide grading range: d97 = 2 ~ 15 um 6, Fully automatic control is realized as such advanced technology as touch-sensitive screen and programmable PLC controller are used in the unit. APPLICATION SCOPE: The unit can be used to pulverize flammable, explosive and easily oxidative materials and is thus widely applicable to the superfine pulverization in such fields as western medicine, traditional Chinese medicine, agricultural chemical, chemical industry, metal and rare metal industry

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