| 摘要 |
Lead sources, and particularly lead sulfide concentrates, are halogenated utilizing a halogen gas in a dry atmosphere at a relatively low temperature to selectively halogenate the lead. The process is improved by effecting the halogenation in a fluidized state in a fluidized bed reactor, the fluidized state of the lead sulfide being accomplished by introducing a mixture of halogen gas and an oxygen-containing gas at a rate sufficient to maintain the lead sulfide in the desired fluidized state. Thereafter, metallic lead may be obtained by leaching the halogenated mixture with brine, filtering to separate elemental sulfur and residue from soluble lead halide. The soluble lead halide is then crystallized and the desired metallic lead is obtained by fused salt electrolysis.
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