Produce a lot of pollution
Polysilicon is a highly polluting project, and most of China's polysilicon companies are not fully environmentally friendly. Silicon carbide, a by-product of the production of polysilicon, is a highly toxic substance. The land used to dump or bury silicon tetrachloride will become a barren land where neither grass nor trees will grow. It is potentially dangerous, not only toxic, but also pollutes the environment, and the cost of recycling is huge.
Industrialization gap
Compared with the international advanced level, the gap in the industrialization of domestic polysilicon production enterprises is mainly reflected in the following aspects:
The contradiction between supply and demand is low
In 2005, the operating rate of China's solar monocrystalline silicon enterprises was 20%-30%, and the operating rate of monocrystalline silicon enterprises for semiconductors was 80%-90%, which could not achieve full-load production. The polysilicon technology and market are still firmly in the US. Among the few manufacturers in Japan and Germany, China’s industrial development is seriously constrained.
Small production scale
The smallest economic scale currently recognized is 1,000 tons/year, and the best economic scale is 2,500 tons/year. However, China's current polysilicon production enterprises still have a large distance from this scale.
Process equipment behind
The material and power consumption of similar products are too large, and the three wastes have many problems. Compared with the international level, domestic polysilicon production energy consumption is more than doubled, and the product cost is not competitive.
other
4. The reliability, advancement, maturity and mutual matching of thousands of tons of process and equipment technology are to be verified by production and operation, and further improvement and improvement are needed.
5. The domestic polysilicon production enterprises are not strong in technological innovation, and the basic research funds are too little, especially the non-standard equipment has poor R&D and manufacturing capabilities.
6. Local government and enterprise projects invest in polysilicon projects, and there are hidden concerns about low-level redundant construction.
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