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改进型电极感应气雾化制备球形铬粉的工艺

The process of spherical chromium powder preparation by improved electrode induction gas aeroatomization

  • 摘要: 采用改进型电极感应气雾化技术,验证雾化制备球形铬粉的可行性,通过工艺优化,提升生产效率。重点研究过热度和雾化压力对粉末粒度分布及收得率的影响,利用扫描电镜和霍尔流速计等手段,评估球形铬粉的形貌与流动性。研究结果表明:EIGA法制备的铬粉球形度高达98%以上;最佳过热度为230~300 ℃;雾化压力增加促使粒度减小;5 MPa下15~53 μm粉末收得率最优,且效率远超等离子法,同时保持或超越等离子法制备铬粉的性能水平。

     

    Abstract: Adopting improved Electrode Induced Gas Atomization (EIGA) technology, the feasibility of preparing spherical chromium powder by atomization is verified, and production efficiency is improved through process optimization. The effects of superheat and atomization pressure on powder particle size distribution and yield were focused. Scanning electron microscopy and Hall flowmeter were used to evaluate the morphology and flowability of spherical chromium powder. The results show that the sphericity of chromium powder prepared by EIGA method is over 98%. The optimal degree of superheat is 230-300 ℃. An increase in atomization pressure leads to a decrease in particle size. The yield of 15-53 μm powder is optimal at 5 MPa, and the efficiency far exceeds that of plasma method, while maintaining or surpassing the performance level of chromium powder prepared by plasma method.

     

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