Method of removing impurity element copper in crude lead through supergravity

Abstract

The invention relates to the technical field of refining of crude lead, and discloses a method of removing impurity element copper in crude lead through supergravity. The method comprises the following steps of: cooling melted crude lead melt mass at a cooling rate of less than 10 DEG C / min to obtain the pretreated crude lead; and carrying out supergravity separation treatment on the pretreated crude lead, wherein the treatment temperature is 330 DEG C-350 DEG C, the gravity coefficient is greater than 100, and the time of supergravity separation treatment is 10-20 minutes. The method has the beneficial effects that the relative movement of a solid copper phase and metallic lead liquid is greatly intensified by utilizing supergravity; the complete separation of an impurity copper phase and refined lead is completed within very short time, thereby realizing the purpose of purifying the crude lead by removing copper in the crude lead; meanwhile, the yield of metallic lead is also greatly increased, and the wasting and environmental pollution of the metallic lead are reduced; and the method is simple in technological process, low in cost, environmentally-friendly and suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of crude lead refining, in particular to a method for removing impurity element copper in crude lead by supergravity. Background technique [0002] Copper is the most important impurity element in the crude lead produced in industry, so the impurity copper should be removed first in the crude lead refining and purification process. [0003] At present, the industry generally adopts fire refining and electrolytic refining to purify crude lead. The first step of pyro-refining is to remove the impurity copper. Conventional copper removal methods include smelting copper removal method and sulfur addition copper removal method. Although these two methods can reduce the copper content in crude lead to a relatively low level, in the process of copper removal by smelting, operators need to repeatedly salvage copper slag, so the operation time is long and the labor intensity of workers is high; while adding sulfur t...

AI Technical Summary

Problems solved by technology

Although these two methods can reduce the copper content in crude lead to a relatively low level, in the process of copper removal by smelting, operators need to repeatedly salvage copper slag, so the operation time is long and the labor intensity of workers is high; while adding sulfur to remove copper In the process, different levels of sulfur need to be added in batches, so the process route is relatively complicated. In addition, the smoke and dust generated by sulfur addition are very harmful to the human body and the environment, and the working environment for workers is harsh.

And the residual metallic lead content in the copper dross salvaged exceeds 60wt%, causes a large amount of waste of metallic lead

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