US 2026/0139341 A1Published application

Method for fire refining of complex crude lead

AssigneeKunming University of Science and Technology

InventorsYifu LI, Bin YANG, Baoqiang XU, Yang TIAN, wenlong JIANG, Kai WANG, Huan ZHANG, Jinping MA

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Abstract

Provided is a method for fire refining of a complex crude lead. The method includes subjecting the complex crude lead to condensation to obtain a low-copper lead and a copper dross I; subjecting the low-copper lead to crystallization to remove silver and bismuth to obtain a low-silver lead and a high-silver lead; subjecting the low-silver lead to deep copper removal with sulfur addition to obtain a copper-removed lead and a copper dross II; and subjecting the copper-removed lead to arsenic-antimony-tin removal by an alkali process to obtain a refined lead and an arsenic-antimony-tin slag.

Claims8

Dependent claims

A method for fire refining of a complex crude lead, which is performed by a condensation-crystallization-slagging process, comprising steps of:

(1) subjecting the complex crude lead to condensation to obtain a low-copper lead and a copper dross I;
(2) subjecting the low-copper lead obtained in step (1) to crystallization to remove silver and bismuth, to obtain a low-silver lead and a high-silver lead;
(3) subjecting the low-silver lead obtained in step (2) to deep copper removal with sulfur addition, to obtain a copper-removed lead and a copper dross II;
and
(4) subjecting the copper-removed lead obtained in step (3) to arsenic-antimony-tin removal by an alkali process to obtain a refined lead and an arsenic-antimony-tin slag.

2 more elements

Dependencies are inferred from the claim text.