Production of high-frequency coils with twelve or thirteen silicon cores

Abstract

A high-frequency coil for producing twelve or thirteen silicon cores, relating to the technical field of high-frequency coils, the high-frequency coil is surrounded by a cooling water channel (12), and the drawing hole or material hole (4) is set in the high-frequency coil In the middle of the coil (1), drawing holes (5) are respectively provided at the two outer ends of the upper parts of the three diversion grooves (11), and the outer ends of the lower diversion grooves are provided with excessively drawn holes (10). Two drawing holes and a racket-shaped drawing hole (3) or a drop-shaped drawing hole (17) are respectively arranged between each neutral gear, and the opening (6) on the other side of the corresponding diversion groove is described in the excessive drawing hole. ) to the outer edge surface of the high-frequency coil, the two mouths of the cooling water channel are respectively provided with extension pipes, and the ends of the water channel A end (7) and the water channel B end (9) are respectively provided with connecting seats (8); The outside of the high-frequency coil is provided with a ground wire connection mechanism; the invention increases the number of drawing holes of the high-frequency coil, and reduces the probability of contact between the upper end of the raw material rod and the high-frequency coil.

Description

【Technical field】 [0001] The invention relates to the technical field of high-frequency coils, in particular to a high-frequency coil for producing twelve or thirteen silicon cores. 【Background technique】 [0002] At present, the amount of silicon cores used in China is very large; in the existing process of producing silicon cores, single crystal silicon and other material crystal zone melting methods, most of them use a monocular high-frequency coil, and its working principle is: When working, pass high-frequency current to the high-frequency coil, so that the high-frequency coil generates current to inductively heat the raw material rod, and the upper end of the heated raw material rod forms a melting zone, and then inserts the seed crystal into the upper end of the raw material rod through the drawing hole Then slowly lift the seed crystal, the melted raw material will rise with the seed crystal to form a new columnar crystal, which is the finished product of silicon cor...

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Problems solved by technology

[0003] The designer has applied for a number of high-frequency coil patents for inventions or utility models, which has basically ended the drawing of a single silicon core in China. Although good technical results have been obtained in use, how to distribute the high-frequency coils on the high-frequency coil More drawing holes and the ellipticity of the drawn silicon core have always been a technical bottleneck. This is mainly due to the limitation of the high-frequency coil current distribution. If too many drawing holes are set, the raw material rod will not be heated properly. Evenly, the partial chemical material is not complete, that is, the small melting zone formed by the corresponding drawing hole or chemical material hole. Without expansion, the drawing hole in the previous application is changed to a racket-shaped drawing hole or a drop-shaped drawing hole, so that the problem of ellipticity can be greatly overcome

[0008] In fact, the price of polysilicon has decreased, and the price of the terminal market has also decreased. The production cost of polysilicon in my country is still not comparable to that of foreign advanced polysilicon enterprises. Our Chinese polysilicon is a mode that caters to the needs of the development of the solar photovoltaic industry and rushes into battle. ;Compared with international advanced technology, there is still a big gap between enterprises with independent research and development or imported equipment and technology

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