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genhunter

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专业: 肿瘤化学药物治疗

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longwen8: 金币+5, 翻译EPI+1, ★★★★★最佳答案 2017-09-13 09:45:07

In the process of high-temperature melting reduction, various oxides in the CRT glass are involved in reactions. All oxides could be reduced, but to different degrees, among which PbO is the easiest, while SiO2, CaO, Al2O3, MgO are reduced sluggishly. Because the affinity between lead and oxygen is much lower than the rest, it is easy to create a condition under which lead is reduced, while SiO2 and CaO are not. Since the reactivities of Na, K, and Ca metals are stronger than carbon, these cannot be reduced.

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