Method and device for removing impurities from metal sulfonium

Abstract

The invention discloses a method for removing impurities from metal sulfonium, and further discloses a device for removing impurities from metal sulfonium. The method comprises the following steps: (1) preheating an impurity volatilization vacuum chamber, and adding the metal sulfonium into a melt tank; (2) opening a vacuum pump to evacuate air from the impurity volatilization vacuum chamber, so that the metal sulfonium enters the impurity volatilization vacuum chamber through a connecting pipe of the impurity volatilization vacuum chamber; (3) injecting driving gas into the driving gas access port of an ascending pipe in the connecting pipe, so that the metal sulfonium continuously sprays into the impurity volatilization vacuum chamber, and then falls back into the melt tank through a descending pipe in the connecting pipe to form circulatory flow; (4) closing the vacuum pump to stop the injection of the driving gas. According to the method, the impurities can be removed from the metal sulfonium, and the influence of excessive impurities on an electrolysis process during the metal smelting production can be eliminated. The device provided by the invention comprises a melt tank, the impurity volatilization vacuum chamber and the vacuum pump, wherein the impurity volatilization vacuum chamber is provided with the connecting pipe; the vacuum pump is connected with the impurity volatilization vacuum chamber. The device is capable of removing volatile impurities from the metal sulfonium.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and more specifically, relates to a method for removing impurities of metal matte, which is mainly applicable to copper matte and nickel matte, and also relates to a device for removing impurities of metal matte. Background technique [0002] Most metals such as copper and nickel exist in the form of sulfide in nature, and the smelting process generally needs to go through steps such as smelting, blowing and electrolytic refining. Correspondingly, during the smelting process, metal sulfide ore will appear in the form of metal matte , the following takes copper smelting as an example to introduce its smelting process in detail. [0003] The smelting and production of copper sulfide ore mainly includes the following processes: smelting process, blowing process, pyro-refining process, and electrolysis process. After the copper concentrate is smelted, a part (40-70%) of the impurities (such as le...

AI Technical Summary

Problems solved by technology

In the prior art, in order to avoid wasting metal raw materials, the smoke generated in the smelting process needs to be returned to the smelting system. Due to this cycle, about 60% of the metal impurities in the copper concentrate raw materials enter the smelting slag, and about 40% of the metal impurities enter the ice Copper, resulting in too high impurity content in the matte obtained in the smelting process

[0004] When high-impurity matte is being converted, impurity elements (including elements such as lead, zinc, arsenic, antimony, bismuth, etc.) volatilize and mix into the flue gas in the converting furnace, which will cause the flue gas to stick to the In the flue of the converting furnace, the flue nodules are caused, and the failure rate of the converting furnace is high, which is not conducive to the smooth progress of the converting process

[0005] In addition, the high impurity content in matte copper will lead to high impurity content in the blister copper formed by the blowing process, and the high impurity content in the anode copper formed by the blister copper through the pyro-refining process, which will cause the electrolysis process for anode copper to fail to proceed smoothly.

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