| 摘要 |
A method for eliminating bismuth from molten lead with calcium and magnesium, in which the addition of calcium and magnesium is made in the form of lumps two Mg-Ca alloys, one containing predominantly Mg, the other containing predominantly Ca, each having a liquidus temperature lower than 650° C., and preferably lower than 600° C. A preferred treatment utilizes a first alloy containing 12-25% Ca, close to the eutectic alloy at 16.2% by weight Ca, and a second alloy containing 60-80% Ca. The method enables rapid elimination of bismuth, and adjustment of the Ca/Mg ratio during the treatment. |
