Guizi Dan leads domestic powder manufacturing with PREP technology.

On August 12, the Hanzhong Correspondent Station of Shaanxi Television arrived at the Guizidan Metal Powder Production Base to engage in an in-depth dialogue with Chairman Chen Mingfei regarding technological innovation in metal powder production, industrial applications, and future development.

Self-developed PREP equipment technology

Since 2014, Guizi Dan has initiated its independent R&D efforts for PREP plasma rotary electrode-based atomization powder production equipment; after ten years of continuous dedicated research and development, our company has fully mastered the entire technological chain, spanning from technical principles to engineering implementation.

Guizidan's proprietary PREP powder preparation equipment comprises four major modules: a high-speed centrifugal system, a high-power plasma system, an adaptive control system, and a dynamic high-temperature sealing system. The coordinated operation of these systems ensures that the resulting powder exhibits significant advantages—such as high sphericity, absence of hollow particles, low oxygen enrichment, and elimination of both metallic and non-metallic contamination—representing a marked improvement over traditional manufacturing processes in terms of quality control.

Leveraging our proprietary PREP equipment, we address two of the industry's most critical challenges.

I. Improved the recovery rate of fine powder

Traditional manufacturing methods are constrained by centrifuge rotational speed limitations; consequently, the yield rate achieved using the commonly employed particle size range of 15–53 μm in 3D printing has consistently failed to meet economic viability requirements. Guizidan's independently developed high-speed centrifugal system operates with stable performance; for high-density alloy powders—such as iron-based or nickel-based powders—the recovery rate for fine powders in the 15–53 μm range can be reliably increased to over 60% (based on input). This breakthrough significantly reduces the powder cost associated with additive manufacturing and provides strong support for the large-scale adoption of advanced metal printing technologies.

II. Improved metal powder quality

Other powder preparation processes often suffer from issues such as an excessively high proportion of hollow particles, insufficient sphericity, significant increases in oxygen content, or contamination by metallic or non-metallic impurities. Guizidan's self-developed PREP equipment effectively addresses these shortcomings at the fundamental design level; the resulting powder contains no hollow particles, exhibits well-defined morphology, and possesses a pure chemical composition. As a result, it requires no complex post-processing and can directly meet the stringent quality requirements of high-end additive manufacturing applications.