| 摘要 |
#CMT# #/CMT# Eliminating bismuth from lead using magnesium and calcium, comprises introducing magnesium and calcium into a molten bath in the form of alloys of magnesium, calcium and strontium, of magnesium calcium and lead, of magnesium calcium, strontium and lead or of magnesium, calcium, strontium, sodium and lead. #CMT#USE : #/CMT# The method is useful for eliminating bismuth from lead using magnesium and calcium. #CMT#ADVANTAGE : #/CMT# The method ensures efficient, rapid and economic elimination of bismuth from lead using magnesium and calcium thus providing lead with high purity. #CMT#INORGANIC CHEMISTRY : #/CMT# Preferred Components: In the magnesium, calcium and lead alloy, the lead is present in an amount of 0-60%, preferably 5-40% and the calcium is present in an amount of 10-50%, preferably 20-40%. In the magnesium, calcium, strontium and lead alloy, the lead is present in an amount of 0-40%, preferably 5-30%, the calcium is present in an amount of 10-50%, preferably 20-35% and the strontium is present in an amount of 0-40%, preferably 5-20%. In the magnesium, calcium, strontium, sodium and lead alloy, the sodium is present in an amount of 5-20%. The molten bath is maintained at a temperature of 400-500[deg] C. A weight ratio of magnesium/calcium or the sum of magnesium/calcium and strontium or the sum of magnesium/calcium, strontium and sodium is 1-6, preferably 1.5-5. |
