Polycrystalline silicon lump material selection device and selection method

Abstract

The invention discloses a polycrystalline silicon lump material selection device and selection method, and relates to the field of polycrystalline silicon production equipment. The polycrystalline silicon lump material selection device comprises a feeding pipe, a first-stage conveying mechanism capable of conducting magnetic separation, a feeding pipe, a second-stage conveying mechanism, a third-stage conveying mechanism and a collecting box; a winnowing mechanism is installed in the feeding pipe, the outlet end of the feeding pipe is in butt joint with the output end of the first-stage conveying mechanism, and the output end of the first-stage conveying mechanism is in butt joint with an inlet of the feeding pipe; electrodes which are symmetrically distributed are mounted in the feeding pipe; the second-stage conveying mechanism and the third-stage conveying mechanism are symmetrically arranged, and the input end of the second-stage conveying mechanism and the input end of the third-stage conveying mechanism are both located between the two electrodes; and an inlet of the collecting box is in butt joint with an outlet of the third-level conveying mechanism, and a color sorting mechanism is further installed on the collecting box. According to the device, not only can impurities be automatically removed, but also the processing quality of the polycrystalline silicon lump material is ensured, and the fine selection of the polycrystalline silicon lump material is realized.

Description

technical field [0001] The invention relates to the field of polysilicon production equipment, in particular to a polysilicon block material selection device and a selection method. Background technique [0002] With the increasingly serious world energy crisis, the utilization of green energy, energy diversification, and renewable energy has become a strategic choice for sustainable development in my country, among which solar photovoltaic power generation has become one of the hot topics researched and developed by electric power scientists. Among them, polysilicon is the direct raw material for the production of monocrystalline silicon, and is the electronic information basic material for semiconductor devices such as contemporary artificial intelligence, automatic control, information processing, and photoelectric conversion. The higher the purity of polysilicon, the better the electronic performance, and the corresponding photoelectric conversion rate higher. [0003] ...

AI Technical Summary

Problems solved by technology

At present, the removal of impurities from polysilicon materials mostly relies on the method of manual screening and sorting. This method is not only time-consuming and labor-intensive, but also has high labor intensity and low removal efficiency. It is difficult to completely remove impurities in silicon materials.

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