Particle Size Control and Production Application of Pure Molybdenum Trioxide Preparation in Vertical Furnace AITranslate

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Chinese Library Classification Number:TQ136.12[化学工程]

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In order to solve the problem of small particle size of molybdenum trioxide(MoO₃)products from current vertical furnace production,a controllable preparation method for large-size pure MoO₃ was proposed.Through control of raw material particle size,optimization of roasting parameters in vertical fur-naces,and reduction of mixer operation time,significant improvement in product particle size distribution could be achieved.The experimental results show that the optimized process conditions for pure molybde-num trioxide production are as follows:ammonium dimolybdate(ADM)raw material with FSSS particle size≥38μm,vertical furnace roasting at 490℃with feed rate of 7.5 kg/min for 70 min under furnace pressure of-60~0 Pa,and mixer operation time of 2 min.Over a six-month production period,the ave-rage FSSS particle size of MoO₃ from the optimized process increases from 9.03μm to 16.15μm,with the yield percentage of large particles(10~25μm FSSS size)improving from 35.28%to 85.43%compared with the original process.This optimized process effectively addresses the poor compactibility issues of mo-lybdenum powder caused by the fine particle size MoO₃ products from conventional methods,thereby pro-viding reliable raw material support for downstream deep processing of molybdenum metal.This study provides a quantifiable process control strategy for the industrial-scale production of large-size pure MoO₃ in vertical furnaces.