At present, the granular silicon is mainly composed of GCL and Shaanxi Tianhong Ruike, both of which are silane fluidized bed technology.

GCL achieved the 1000-ton pilot test in 2012, acquired the silane fluidized bed technology patent of SUNEDISON (formerly MEMC) in the United States in 2016, and achieved 10,000-ton mass production in Xuzhou, Jiangsu in 2021, and has now been put into production (1+2) A total of 30,000 tons of production lines. The 30,000-ton production line under construction is planned to be put into production in the third quarter of this year. The 100,000 tons under construction in Leshan, Sichuan is expected to be put into production in the third quarter, and the 100,000 tons in Baotou, Inner Mongolia, will be put into production before the end of this year according to schedule. The total capacity by the end of the year is 260,000 tons. The company disclosed that its forecast for the output of granular silicon this year is about 70,000 tons.

Shaanxi Tianhong Ruike's 20,000 tons is a joint venture project of Shaanxi Nonferrous Metals and Norway's REC, which will form 18,000 tons of granular silicon and a part of silane gas supply capacity in 2021. Tianhong Ruike has started the 80,000-ton capacity expansion design in the first quarter, with a construction period of 18 months.

Granular silicon technology was mainly achieved by REC in the US base in the 2000s, which achieved a mass production of 18,000 tons. By the 2010s, after China's "double-reverse" to US polysilicon, the export of US polysilicon was hindered. Rising in terms of scale, cost and quality, REC granulated silicon stopped production and turned to seek joint ventures in China. With the continuation of a total of 100,000 tons of Shaanxi Tianhong Ruike in the 2020s.

In addition, Hanwha has completed the acquisition of REC and announced that it will restart the 18,000-ton plant in the United States, and plans to resume production in 2023. The view in the industry is that, from the perspective of the quality and cost control of the shipments that year, this device must be significantly transformed if it is to be restarted.

MEMC's granular silicon technology has gone through a diversified route. It has used the by-products of chemical fertilizer plants to generate silicon fluoride, and reduced to produce granular silicon or rod-shaped silicon. Small-scale 100-ton devices depend on the by-product treatment of chemical fertilizer plants, which cannot be scaled. mass production. In 2008, some domestic enterprises adopted this process to start the construction of thousand-ton projects, but it was not successful. MEMC also operates a 100-ton silane fluidized bed unit in the United States. Later, in the 2010s, Korean companies introduced and constructed a thousand-ton project without success.

At present, Jolywood has announced a 100,000-ton polysilicon project. In Gujiao County, west of Taiyuan, it has confirmed the first phase of 10,000 tons, using silane fluidized bed technology. From the relevant disclosure, it is likely to be the team of Inner Mongolia Xingyang Technology Co., Ltd. The company is located in an industrial zone in Zhungeer Banner, Erdos, Inner Mongolia. Preparations in 2014, the completion of the pilot line of more than 1,000 tons, and the recruitment of talents in silane preparation and fluidized bed since last year.

At present, the domestic patent for silane fluidized bed is mainly from the original Zhejiang Zhongning Silicon Industry. It made silane around 2012, but did not mass-produce granular silicon. Later, it went bankrupt and was acquired by Polyfluoride to produce silane gas. There is also the original photovoltaic equipment manufacturer Zhejiang Jinggong Technology, which claims to have a silane fluidized bed process package, but has not achieved mass production performance of the project.