Silicon material scattering and recycling system

Abstract

The invention discloses a silicon material scattering and recycling system. The silicon material scattering and recycling system is capable of realizing graded recovery of crushed silicon material, the recycled silicon material particles are guaranteed to be small, and impurities are removed thoroughly after the silicon material is recycled. The silicon material scattering and recycling system comprises a hot air tank, a scattering machine, an air outlet barrel, a connecting pipeline, a first material collecting tank, a first fan, a second material collecting tank, a second fan, a cyclone separator and a third material collecting tank communicating with one another in sequence. According to the silicon material scattering and recycling system, the crushed silicon material is scattered by the arranged scattering machine, then four-stage powder separation is realized through the first material collecting tank, the second material collecting tank, the cyclone separator and the third material collecting tank so that the crushed waste silicon material can be classified and recycled, the received silicon material powder particles are guaranteed to be small enough, and therefore alkali washing and ultrasonic cleaning in the follow-up process steps can be guaranteed to remove the waste silicon material impurities, recycling of the waste silicon material can further be ensured, and theproduct quality is further improved.

Description

technical field [0001] The invention relates to the recycling of waste silicon materials, in particular to a silicon material breaking and recycling system. Background technique [0002] It is well known that after the waste silicon material is recycled, it must be treated to a certain extent before it can be reused. Because the recovered waste silicon material will definitely contain a lot of impurities, and the industrial silicon material must have a purity of more than 98%. [0003] After the silicon material is recovered, pretreatment is carried out first, and the waste silicon material is broken into small pieces of about 3 mm. Then put the waste layer of silicon material containing impurities into the container, add lye to ultrasonic alkaline washing; after the reaction is complete, rinse the silicon material with pure water until the pH is about 7; then add acid solution to the silicon material to control the temperature , pressure, and reaction time; after the reac...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, during pretreatment, the waste silicon material is broken into small pieces of about 3 mm, and then put into a container, and lye is added for ultrasonic alkaline washing; therefore, the waste obtained by breaking the silicon material during the breaking process is Not very uniform, if there are larger particles in it, it will cause incomplete removal of impurities in subsequent steps, resulting in unqualified final product quality

Images