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In the flame refining of crude lead in the Belen electric zinc plant in Belgium, the method of adding calcium and magnesium to remove slag is used as a raw material for raising slag. The process flow is shown in Figure 1.
Figure 1 Barron electric zinc plant recycling process
This process mainly includes three steps of melting, Pb-Bi electrolysis and chlorination refining: alkaline decalcification, magnesium and electrolysis are included in the melting to achieve separation of lead and antimony, and chlorination refining is to remove residual lead. In the pyrometallurgical refining of lead, impurities such as copper , arsenic , antimony , silver , and zinc have been removed before dislocation. Therefore, after the scum separates calcium, magnesium, and lead, fine sputum can be produced.
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