Nowadays, casted multicrystalline silicon is the most important material in photovoltaic industry. In order to reduce the cost of silicon ingots, the recycle of silicon ingot tailings is explored. In this paper, the secondary utilization of silicon block tailings with a thickness of 25 mm, matched with process of diamond wire saw machine was studied. The comparative analysis on technical parameters of bottom red zone and wafers generated by virgin crushed polycrystalline silicon feedstock and secondary utilized tailings was discussed. The result shows that recycle of tailing seeds is feasible. The above-mentioned tailings of diamond wire saw ingots shall be with a thickness of 25 mm. The bottom red zone of area paved by tailings is 2 mm longer than that in area paved by virgin crushed polycrystalline silicon feedstock. But the difference of cell conversion efficiency is negligible, 0.01% lower. Consequently, it is feasible to recycle high-efficiency multicrystalline ingots tailings, which push forward further cost reduction of high-efficiency multicrystalline ingots.

如今，铸造多晶硅是光伏行业中最重要的材料。为了降低硅锭的成本，探索了硅锭尾料的再循环。本文研究了与金刚石线锯机工艺相匹配的厚度为25mm的硅块尾矿的二次利用。讨论了由原始压碎的多晶硅原料和二次利用的尾矿产生的底部红色区域和晶片的技术参数的比较分析。结果表明，回收尾矿种子是可行的。金刚石线锯锭的上述尾矿的厚度应为25 mm。尾矿铺成的底部红色区域比原始压碎的多晶硅原料铺成的底部红色区域长2 mm。但是细胞转化效率的差异可以忽略不计，降低0.01％。因此，回收高效率的多晶锭尾矿是可行的，这进一步推动了高效率的多晶锭的成本降低。