China News Service, Xining, December 11 (Sun Rui, Li Long, Zhang Jing) The reporter learned from the State Power Investment Corporation Yellow River Hydropower Company (hereinafter referred to as the "Yellow River Company") on the 11th that the company added 800 tons of electronic grade polysilicon production lines for the first batch The 10th product release marked the increase in the production capacity of Chinese mass-produced electronic grade polysilicon enterprises from 2500 tons/year to 3,300 tons/year, breaking the foreign monopoly and the situation that China's integrated circuit basic raw materials mainly rely on imports, and it is important to safeguard China's integrated circuit industry. The strategic safety of raw materials is a milestone.
As the forefront of basic materials for integrated circuits, polysilicon materials have been monopolized by foreign countries in terms of production technology and market, which has become a bottleneck for China's development of the integrated circuit industry.
According to Zhang Yongliang, deputy general manager of the New Energy Branch of the Yellow River Company, this technological transformation project incorporates a number of new processes and technologies such as boron removal adsorption, slag slurry recovery, etc., under the premise of making use of the original production capacity of 2500 tons/year of polysilicon equipment , Through the newly added rod reduction furnace, the original tail gas recovery, reduction, cold hydrogenation, rectification, finishing and other 6 devices were optimized and improved and technically modified, which successively solved the high power consumption of reduction and the processing capacity of the tail gas recovery device. Due to limited issues, the production capacity was increased to 3,300 tons per year, which allowed the domestic market share to exceed 15%, and truly realized the "Made in China" of electronic grade polysilicon.
"The clean area of polysilicon production and the cleanliness of the construction and installation of the process system directly affect the quality of the finished product. For this reason, we have strictly controlled the clean quality of the construction process and realized that all 4 technical transformation devices were successfully driven at one time. The industry is really rare.” Said Wei Sheng, deputy director of the technical reform project team.
Zhang Yongliang said that the successful one-time test run of the project and the smooth production of products indicate that the company has mastered the production process and quality control technical capabilities of electronic grade polysilicon. The next step will be to conduct purity testing of the baked products and continue to optimize according to the impurity content. Equipment and process parameters improve the output rate of electronic grade products.
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