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在一个机械搅拌的铝熔池中进行了用铝热还原法从碳酸锶中提取锶的试验.熔铝中含有添加的镁或铋,加镁有两个理由:一是增加反应活力;二是降低熔融合金的表面张力.加铋仅降低表面张力而不改变熔融液的反应性.试验条件为:温度1000℃,压力一个大气压,接触时间1小时.结果表明,Mg:Sr摩尔比为10:1时,从被加入过量铝的碳酸锶中,锶的回收率大于50%,将加镁或铋的试验进行比较,表明镁的化学作用强于铋或镁的表面张力作用.
In a mechanically stirred aluminum bath with aluminothermic reduction of strontium from strontium carbonate extraction test.Saluminum containing magnesium or bismuth added, plus magnesium for two reasons: First, increase the reactivity; the second is Reducing the surface tension of molten alloy.Add bismuth only reduce the surface tension without changing the reactivity of the melt.The test conditions are: temperature 1000 ℃, pressure 1 atmosphere, contact time 1 hour.The results show that the molar ratio of Mg: Sr is 10: 1, the strontium recovery was> 50% from the addition of strontium carbonate with excess aluminum and the addition of magnesium or bismuth was compared to show that the chemical effect of magnesium is stronger than that of bismuth or magnesium.