PENG Lin1 ，TAN Qi2 , 3 ， LIU Lei2 ,3 ， QIAN Chenguang1 ， LI Chunquan1 ，SUN Zhiming1 ，YUAN Fang1
(1. School of Chemistry and Environmental Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China;
2. Zhengzhou Institute of Multipurpose Utilization of Mineral Resources，CAGS，Zhengzhou 450006，China;
3. National Engineering Research Center for Multipurpose Utilization of Nonmetallic Mineral Resources，Zhengzhou 450006，China)
Abstract
Significance Powder， as a crucial industrial raw material， faces increasingly stringent performance demands with the evolving scope of its applications. Apart from necessitating low impurity content， fine particle size， and precise particle size distribution， powders also require specific particle morphologies. Spherical powders offer distinct advantages over conventional counterparts， primarily evident in the following facets：1） The regular surface morphology of spherical powders reduces defects in the production process， thereby minimizing mold loss in the finished product. 2） Spherical powders exhibit a narrower particle size distri⁃ bution range， ensuring greater uniformity in particle size distribution. 3） Enhanced mobility of spherical powders facilitates increased powder filling capacity， particularly benefiting powder metallurgy applications by significantly augmenting the density of molded parts. 4） During sintering， spherical powders demonstrate more uniform shrinkage， facilitating effective control over grain size regulation. Given their superior characteristics in surface morphology， particle size distribution， and flow properties， spherical powders find extensive utilization across diverse industrial sectors.
Progress The traditional physical method for preparing spherical powder， while utilizing widely available and inexpensive raw materials， presents challenges for industrialization due to high equipment requirements. Furthermore， ensuring consistent par⁃ ticle characteristics post-production remains problematic， rendering it suitable only for applications with lower product quality requirements. In contrast， chemical methods offer advantages in achieving uniform particle size and high purity levels， albeit with significant demand for chemical reagents such as surfactants and precipitants. Challenges arise in effectively removing organic impurities， leading to agglomeration issues and hindering industrial scalability. The high-temperature melting method， widely employed for high melting point powders like quartz and various metal powders， yields spherical powders with high sphericity， low impurity content， and narrow particle size distributions. This method's adaptability to varying melting points allows for environmentally friendly production processes with minimal environmental impact. The resultant product particles exhibit enhanced vibration density， sphericity， and mobility， making them suitable for high-end applications. Consequently， the hightemperature melting method holds significant promise for large-scale industrial production of high-performance spherical powder materials.
Conclusions and Prospects As an integral component of modern industry and technology， powder spheroidizing technology plays a crucial role in enhancing the surface and physical properties of powders. This， in turn， improves the precision and efficiency of manufacturing processes， optimizes material properties， meets multifunctionality requirements， reduces energy con⁃ sumption， and fosters green manufacturing practices. Currently， powder spheroidizing technology has permeated various sectors including pharmaceuticals， food processing， chemicals， environmental protection， materials science， metallurgy， and 3D printing.
Keywords：spherical powder； spheroidization； high-temperature melting； plasma
Get Citation:Research progress on preparation technology of spherical powder［J］. China Powder Science and Technology，2024，30（3）：12−27.
Received:2023-10-16.Revised:2024-03-12,Online:2024-04-26.
Funding Project:国家自然科学基金项目，编号：52304310；中国地质调查局地质调查项目，编号 ：DD20221698。
First Author:彭琳（1999—），女，硕士生，研究方向为非金属矿物材料。E-mail：penglin202210@163. com。
Corresponding Author:袁方（1994—），男，讲师，博士，研究方向为非金属矿物材料、资源深加工与综合利用。E-mail：fangyuan@cumtb. edu. cn； 孙志明（1986—），男，教授，博士，中科协托举工程人才，研究方向为非金属矿物材料、资源深加工与综合利用。E-mail： zhimingsun@cumtb. edu. cn.
DOI：10.13732/j.issn.1008-5548.2024.03.002
CLC No:TB44 Type Code:A
Serial No:1008-5548（2024）03-0012-16
