The recovery of crystalline silicon from diamond-wire cutting waste with microwave-assisted hydrochloric acid leaching was studied. The experimental results indicated that the optimum conditions for the hydrochloric acid concentration, liquid–solid ratio, leaching time, leaching temperature and particle size were 2 mol/l, 6:1 ml/g, 10 min, 100 °C and 98 nm, respectively. Under optimal conditions, the purity of silicon could reach 99.57% because the polar molecule hydrochloric acid has a temperature effect, orientation effect and molecular rotation effect in microwave electromagnetic fields. For metal oxides with variable valences showing strong absorption of microwave irradiation, the leaching efficiencies of Al and Ca are not nearly as good as that of Fe. The kinetic experiment showed that the leaching of metal impurities (Al, Fe,Ca) in hydrochloric acid was controlled by the solid product layer diffusion, with apparent activation energies calculated to be 21.16 kJ/mol, 13.31 kJ/mol and 16.63 kJ/mol for Al, Fe and Ca, respectively.

中文翻译：

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微波辅助酸浸法从金刚石线切割废浆中回收硅

研究了微波辅助盐酸浸出从金刚石线切割废料中回收晶体硅。实验结果表明，盐酸浓度、液固比、浸出时间、浸出温度和粒径的最佳条件为2 mol/l、6:1 ml/g、10 min、100 ℃和98 nm，分别。由于极性分子盐酸在微波电磁场中具有温度效应、取向效应和分子旋转效应，在最佳条件下，硅的纯度可达99.57%。对于具有强烈吸收微波辐射的价态可变的金属氧化物，Al 和 Ca 的浸出效率几乎不及 Fe 的浸出效率。动力学实验表明，金属杂质（Al、Fe、