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Crystalline silicon solar battery
release time:2017/6/23 10:15:35

Crystalline silicon solar cell manufacturing process is: the preparation of silicon materials, solar cell manufacturing and packaging of solar modules three parts.

      Metallurgical grade silicon production

     Because the first metallurgical silicon have a variety of silicon solar cells, so start from the metallurgical silicon。 Silicon, like carbon, is the most basic component of steel。 The presence of silicon can significantly improve the strength, hardness, abrasion resistance and hardenability of steel。 Therefore, silicon is one of the most important materials in the steel industry。 The production is very large。 Production is about 1 × 106t。 Metallurgical grade silicon is smelted in a large electric arc furnace using silicon dioxide (such as quartz or sand) and carbon (a mixture of wood, coke and coal) as a raw material。 At 1500 ° C, the liquid silicon (purity 98% ~ 99%) is baked and further purified to 99。5% by blowing oxygen or oxygen / chlorine mixed gas。 Then, the liquid silicon is poured into the shallow tank, solidified and divided into crushed Piece。 Typical electric arc furnace production capacity is lt / h metallurgical grade silicon。 With new raw material filling (quartz and sand briquettes), the power consumption can be reduced to 13kW • h / kg。

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