Production package after years of practice, we think mainly crystal bar type B molybdenum acid as by roasting process via reduction, suppression of sintered article further deep processing of raw material is better, the current domestic processing filaments article molybdenum manufacturers also continue to use this material as drawn filaments molybdenum strip of raw materials, in addition to the product shape appearance, the content of major elements, such as kalium, sodium, physical properties, such as Ratio, particle size and so on all must meet certain requirements, and maintain a relatively stable.
From the perspective of production methods, the preparation process of molybdenum strip is as follows:
molybdenite concentrate → oxidative roasting → calcining → leaching → ammonium molybdate solution → purification → neutralization crystallization → ammonium polymolybdate solution → dissolution → evaporation crystallization → ammonium secondary molybdate → calcining → molybdenum trioxide → reduction → molybdenum powder → molding sintering → molybdenum strip.
Note that ammonia should be added during leaching and dissolution; Hydrochloric acid should be added during neutralization and crystallization. The gas used in reduction is hydrogen.
