Guide: The country has now set off a wave of "stealing electricity" frenzy among all the people. Who is the criminal who steals electricity? It turned out that its source is the increasingly popular solar outdoor light. It is said that stealing electricity is actually transforming the sunlight into electricity through the effect of outdoor solar lights. It should be said that it should be "stealing light." Industrial silicon is an irreplaceable material in the production of outdoor solar lights. How is industrial silicon produced? This article will raise this "posture" for you. Interested in participating in "stealing electricity", please contact customer service.

    There are many methods for the production of industrial silicon. It is recorded that humans originally produced elemental silicon in 1822, which was obtained by the Swedish chemist Bai Zeli using silicon metal to reduce silicon tetrafluoride. However, at present, large-scale production in China mostly adopts a carbon reduction method. The preparation of the method mainly uses carbon reduction quartz sand in an electric arc furnace, quartz sand is used as a raw material, and carbonaceous material is a reducing agent. The reaction equation is: SiO2+C→Si+CO2 The main purpose of industrial silicon production is to remove the oxygen in the raw material quartz sand (SiO2) to make it elemental silicon. Because the affinity of carbon for oxygen increases with temperature, when the temperature exceeds 1400 ° C, the affinity of carbon for oxygen is greater than that of silicon.

    At this time, the oxygen in the quartz sand is continuously taken away by the hot carbon, and the deoxidized quartz sand gradually becomes plain elemental silicon, that is, the industrial silicon is specifically inserted into the carbon electrode by the carbonaceous reducing agent and In the charge composed of quartz sand, silicon is reduced at 1600~1800 °C. The industrial silicon produced by this method has a purity of 98% to 99%, and its main impurities are iron, aluminum, carbon, boron, phosphorus, etc., among which iron content is the most. Therefore, industrial silicon is usually called ferrosilicon.

    The advantage of this method is that it is simple, economical, and has a large production capacity, which is suitable for industrial production. In industrial silicon production, there are many kinds of carbonaceous materials that can be used for reducing agents, and charcoal, coke, petroleum coke, bituminous coal and chaff are all good reducing agents. As a reducing agent, charcoal has a large porosity, a large electrical resistivity, a strong reducing ability, a low ash content, and a certain degree of blockiness.

    Through the analysis of the mechanism of the action of charcoal in the production of industrial silicon, it can be known that charcoal has good gas permeability in addition to its use as a reducing agent, and it ensures the smooth progress of the reaction. Therefore, charcoal is the best carbonaceous reducing agent for smelting industrial silicon. With the depletion of charcoal resources and the increasing protection of forest resources in the country, how to find alternatives to charcoal has become a top priority for the survival and development of silicon industrial enterprises.

    Therefore, when looking for substitutes for charcoal, the substitutes must have the physical and chemical properties of charcoal. The resistivity of bituminous coal is large, and the reducing power is close to that of charcoal. At the same time, with the improvement of the technology of rich coals, the selection of bituminous coal is used for a large amount. Industrial silicon production has become possible. However, the granularity of richly selected bituminous coal is small. When selecting bituminous coal instead of charcoal as carbonaceous reducing agent, it is also necessary to choose a loosening agent to solve the problem of looseness of the charging material. Some people choose a wide source of resources, uniform grain size, and cheap shell as a loosening agent. A mixture of coke, bituminous coal and chaff is used as a substitute for charcoal. As a result, the quality of industrial silicon produced not only meets the standard requirements, but also meets the standard of GB2881-91. Compared with charcoal as a reducing agent, the output of Taiwan is increased by 7.20%, the power consumption is reduced by 6.10%, and the production cost is reduced by 5.63%. Chemical grade silicon improves the production of 13.61% of industrial silicon. Most of the quartz sand raw materials are obtained by crushing quartz stone with higher silicon content.

     In the production of industrial silicon, in addition to the carbon reduction method, there are alkali metal reduction methods such as magnesium and aluminum. The method uses magnesium or aluminum as a reducing agent and quartz sand as a raw material to produce industrial silicon. If the purity of the raw material and the reducing agent are both high, three to four "9" industrial silicon can be obtained, in addition to the alkali metal such as sodium or potassium and calcium hydride to reduce the silicon halide and the fluorosilicate, if the raw material Both the purity of the reducing agent and the reducing agent can also produce relatively pure industrial silicon.

    Solar panels made of this high-purity silicon have higher quality and photoelectric conversion efficiency, and can be safely stolen in the days when there is no big sun in winter! The "stealing electricity" boom of the whole people has become more and more popular. Outdoor solar lights are environmentally friendly, energy efficient and durable. Longxing Industrial provides you with the best outdoor solar lights. Come and steal electricity together?