How To Explain The Polysilicon Enterprises Vital - Polysilicon - The Electronics Industry

Polysilicon due to new Energy PV industry and fame

. It has created the myth of wealth is to attract a large number of companies have launched polysilicon project. But the face of silicon tetrachloride by-product of dealing with problems, polysilicon companies are riding a tiger: Do not do it will seriously pollute the environment, and because production costs will increase the waste of resources; deal with the case for the time being there is no satisfactory technique for reliable support.

Silicon tetrachloride can be resource utilization in the end? What is the current difficulties, "stumbling block" or "paper tiger"? Use of silicon tetrachloride Resources 2010 Technology Conference to, CCIN depth interviews with journalists.

Products into enterprise Gate of Life

Sichuan Xinguang Silicon Technology Co., Ltd. General Manager Shao-Zhang said: "At present, China's polysilicon industry, restricting the development of by-product of the bottleneck is the treatment of silicon tetrachloride. Every 1 kilogram of polysilicon will have 10 to 15 kg tetrachloro silicon, a 1,000 tons / year polysilicon plant per year of silicon tetrachloride by-product will reach 10,000 ~ 15,000 tons. the rapid development of China's polysilicon industry is expected production will reach 40,000 tons this year. by-product of silicon tetrachloride to reach 400 000 to 60 tons, large quantities. If only those silicon tetrachloride by simple hydrolysis or direct emissions, will result in tremendous pressure on environmental protection, but also greatly increased the raw material silicon powder and liquid chlorine consumption of polysilicon production costs will not competitive. "

It is understood that some of polysilicon producers of silicon tetrachloride by-product will even subsidizing freight sent to downstream firms. Why is there gratis silicon tetrachloride situation? Chengdu Shu Ling Chen Zuxiang Technology Development Co., Ltd accept the CCIN president told reporters: "At present, enterprises are concerned with polysilicon production and up to capacity, can be produced like polysilicon, still have time to take into account the utilization of by-products. Previous years , to be launched as soon as possible to seize the market, polysilicon companies in China have complete sets of equipment from abroad. does not know that polysilicon production is a very complicated system engineering, including synthesis, hydrogenation, reduction, separation and many other parts, so the introduction of equipment can be said that 'Power Allied Forces' card . such as imports of Russian synthesis furnace, reduction furnace imported from Germany, the tail gas recovery unit entering the United States. We should open up this complex system, output of polysilicon itself is a severe test. As for the by-product use even more time to pay attention. "

But now the market has changed. At a number of entrepreneurs to the CCIN reporters reflected the market price of polysilicon is now fallen by half the cost of silicon tetrachloride give away too much pressure. How to silicon tetrachloride resource utilization as the key to business survival. At present, many smaller companies have since carried the polysilicon cost pressures and have not live dismount.

Silicon tetrachloride in the end what can be exploited? China Industrial Investment Group as vice president of Yue Han launched polysilicon project, made several trips and visits. He told reporters CCIN, all U.S. polysilicon plant by-products, including silicon tetrachloride Sell Bottlenecks do not exist, would not some of polysilicon, as domestic factories have come out ahead money to get rid of silicon tetrachloride. U.S. polysilicon business that the annual output of 1,000 tons of plant should be in-place silicon tetrachloride into trichlorosilane back to use the system, not as a by-product of foreign sales; annual output of 3,000 tons of polysilicon plant on chlorosilane should be abandoned by recycling process; annual output of 10,000 tons of polysilicon plant, should be local production of silicon metal. This is mainly a security and transportation costs into account two factors.

Theory has a solution

Shao-chang, in fact, the international community on the utilization of silicon tetrachloride long way, mainly outside the factory plant in two directions: first by-product silicon tetrachloride into trichlorosilane polysilicon raw materials silicon, and then returned to the direct production of polysilicon production systems, production line, a closed loop; First, silicon tetrachloride as the raw material used to produce other Chemical industry Products, such as silica, silicon dioxide, and organic silicon products and realize the comprehensive utilization of polysilicon production plant outside.

by:gaga

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