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对介质球磨法制取超细碳化钨粉末进行了研究。实验探讨了不同线速度、磨球尺寸、分散剂的添加对初始粒径约1μm的碳化钨粉末的介质球磨工艺的影响。根据W=P·t,在保持能耗不变的情况下得到了粒度与线速度之间的关系,从而在一定粒度范围内选择最有效的线速度。同时,采取分阶段球磨的球磨效率要高于单一线速度球磨,可实现用更少的成本达到相同粒度。此外,球磨时添加羧甲基纤维素钠分散剂,粉末粒度越小时分散效果越明显,实验中在输出功率不变时,与不添加分散剂对比,其时间效率提高了13%,最终的粉末也呈现很好的分散性。最后,磨球尺寸的大小可决定最终粒度的大小。因此,根据目标粒度采用合适的磨球尺寸和球磨工艺才能达到最高的球磨效率。
The preparation of ultrafine tungsten carbide powder by media ball milling was studied. The effects of different linear velocities, the size of the balls and the addition of dispersant on the ball milling process of tungsten carbide powders with an initial particle size of about 1 μm were investigated experimentally. According to W = P · t, the relationship between grain size and linear velocity is obtained while maintaining the same energy consumption, so that the most effective linear velocity is selected within a certain grain size range. At the same time, ball milling with a graduated ball mill is more efficient than a single linear ball mill, achieving the same particle size with less cost. In addition, the addition of sodium carboxymethyl cellulose dispersant during ball milling resulted in a more pronounced dispersion effect with smaller particle size. In the experiment, when the output power was constant, the time efficiency was increased by 13% compared with no dispersant addition. The final powder Also showed good dispersion. Finally, the size of the ball can determine the size of the final particle size. Therefore, according to the target particle size using the appropriate grinding ball size and ball milling process to achieve the highest ball milling efficiency.