Furnace starting process for melting silicon through induction furnace

一种利用感应炉熔硅的起炉工艺

Abstract

本发明公开了一种利用感应炉熔硅的起炉工艺,将硅块或硅粉放入到感应炉,同时向感应炉中添加铁块;启动感应炉,并升温至1480~1520℃;硅块或硅粉熔化成硅液,取出铁块。本发明将硅块中添加铁块的方式,同时将温度加热到1480~1520℃,此时的温度已经达到硅的熔融温度,而铁块并没有达熔点,保持固体的状态,硅块在融化后形成硅水,将铁块取出后,利用硅水的弱导电性也可以自身感应生热,达到熔炼硅块的目的,相对于坩埚的最大容量20KG而言,本发明利用感应炉进行硅熔炼的方式,可以将单体的熔炼量提升至5吨,相对于现有技术的坩埚熔炼而言,大大提高了产量和生产效率。
The invention discloses a furnace starting process for melting silicon through an induction furnace. Silicon blocks or silicon powder is placed in the induction furnace, and meanwhile iron blocks are added into the induction furnace; the induction furnace is started, and the temperature is raised to 1,480 DEG C to 1,520 DEG C; the silicon blocks or the silicon powder is melted into silicon liquid, and the iron blocks are taken out. According to the mode of adding the iron blocks into the silicon blocks, the temperature is raised to 1,480 DEG C to 1,520 DEG C, the temperature reaches the melting temperature of silicon at this moment, the iron blocks do not reach the melting point and are kept in a solid state, and the silicon blocks form melted silicon after being melted; after the iron blocks are taken out, self-induction heat generation can be achieved through the weak electrical conductivity of the melted silicon, and the aim of melting the silicon blocks is achieved. Relative to the maximum capacity 20 KG of a crucible, the mode of melting silicon through the induction furnace is utilized, and the single silicon melting amount can be increased to 5 tons; relative to crucible melting in the prior art, the yield is greatly increased, and production efficiency is greatly improved.

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