Recently, a subsidiary of Beijing SANDI Technology Co.Wugong Xinxin Nonferrous Metal Casting Co.（The project of "5N Ultra High Purity Aluminum Preparation Demonstration Equipment Development and Supporting Processes" jointly declared by Xinxin Foundry (hereinafter referred to as Xinxin Foundry) and Xi'an University of Technology (hereinafter referred to as Xi'an University of Technology) was successfully selected as one of the key core technology industrialization projects to be supported by Shaanxi Province in 2025 (hereinafter referred to as the Project). The project "Development of 5N Ultra-high-purity Aluminum Preparation Demonstration Equipment and Supporting Process", jointly declared by Xi'an University of Technology (XUT) and Xi'an University of Technology (XUIT), has been successfully selected as one of the projects to be supported by "Unveiling and Hanging" for the industrialization of key core technologies of key industrial chains in Shaanxi Province in 2025. The program aims to promote the industrialization of key core technologies by targeting and deploying key core technology research and development for the short boards of key industrial chains through the method of "unveiling the list of commander-in-chief".

Ultrahigh-purity aluminum (purity ≥ 99.999%) is a key basic material indispensable to high-end manufacturing fields such as semiconductor integrated circuits, solar cells, aircraft navigation systems, radar and so on. Due to its preparation technology barriers are extremely high, for a long time, the material preparation technology is monopolized by foreign countries, China's demand is highly dependent on imports, has become a prominent short board of the industrial chain security.

The unveiled project aims to research and develop complete sets of preparation technology and demonstration equipment for ultra-high purity aluminum above 5N level with complete independent intellectual property rights, aiming to build a demonstration production line with an annual output of 30 tons, and to realize that the key indexes such as material purity, product size, production efficiency and energy consumption and environmental protection have reached the international advanced level.

The project proposes a new process of "melt multi-field coupling solidification regulation multi-link integration of fine aluminum preparation", which aims to realize efficient, low-consumption and green preparation of large-diameter ultra-high-purity aluminum ingots by integrating the synergistic effect of ultrasonic field, electromagnetic field, temperature field and other physical fields. The core technology of the project has three major innovations:

1. Engineering efficient purification methods and equipment. Achieve axial high gradient and radial balanced temperature field control of ultra-high purity aluminum ingot with diameter 50-160mm, and the comprehensive removal efficiency of impurities is increased to 80%.

2. Multi-field coupling integrated process. Technically replace the traditional electrolysis method and establish a fully automated production process route with low energy consumption and low pollution.

3. Frontier mechanism research. In-depth revelation of the changing law of solute boundary layer under rotating magnetic field, providing theoretical support for process optimization.

The project is implemented by Xinxin Casting as the main body of industrialization, and Xi'an University of Technology provides cutting-edge technology research and theoretical support, which is a model of the deep integration of "industry, academia, research and application". Xinxin Casting gives full play to its own rich experience and engineering capabilities in non-ferrous metal melting, casting, precision machining and industrialization, and Xi'an Polytechnic University to form a strong alliance with the top scientific research strength in materials science, solidification theory and other aspects.

As a high-tech enterprise focusing on the field of high-end casting and new materials under the banner of Three Emperor Technology, Xinxin Casting, relying on the strategic support of the parent company in scientific and technological innovation and industrial layout, has continued to increase investment in research and development, and has built an advanced manufacturing system covering 3DP sand printing, precision machining, and full-process testing, which lays a solid foundation for undertaking this kind of major scientific and technological research projects.

Xi'an University of Technology has profound scientific research accumulation in the fields of composite materials and solidification technology, and its research results have won the second prize of the National Science and Technology Progress Award, and the cooperation between the two sides will give full play to the advantages of each side in the engineering application and cutting-edge research.

After the successful implementation of the project, it will not only fill the blank of domestic high-end ultra-high purity aluminum scale green preparation, meet the urgent needs of semiconductor, new energy, aerospace and other industries, and bring considerable economic benefits, but also drive Shaanxi Province and even the whole country "aluminum magnesium and aluminum deep-processing" industry chain to the high-end, green upgrading.