Mechanism of debismuthizing with calcium and magnesium

作者：Lu Dian kun^*; Jin Zhe nan; Chang Yong feng; Sun Shu chen

来源：Transactions of Nonferrous Metals Society of China, 2013, 23(5): 1501-1505.

DOI：10.1016/S1003-6326(13)62622-9

• debismuthizing mechanism
• Kroll-Betterton process
• Ca3Mg7Bi8
• Pb-Ca phase
• Bi-Ca-Mg phase

In order to further understand the debismuthizing mechanism with calcium and magnesium, the influence of adding amount of calcium on the bismuth removal from lead was examined. A part of the debismuthizing dross samples were studied by electron probe microanalysis (EPMA). The results show that the calculated bismuthide governing debismuthizing process is Ca3Mg7Bi8, which may be a mixture of Ca3Bi2, CaBi, CaBi3 and Mg3Bi2. And the bismuthide formed during the debismuthizing process exists in two states: one is free bismuthide in the matrix of dross, and the other is symbiotic with Pb-Ca phase.

• 出版日期2013-5
• 单位东北大学