Copper concentrate smelting method and copper concentrate smelting device

Abstract

The invention discloses a copper concentrate smelting method which comprises the steps of smelting and converting which are carried out in sequence, as well as copper matte impurity-removing which is carried out between the smelting and converting, wherein the copper matte impurity-removing step comprises the following steps: 1) preheating a vacuum chamber and a copper matte tank, and adding molten copper matte into the copper matte tank; 2) starting a vacuum pump for pumping all the air out of the vacuum chamber, and enabling copper matte to enter the vacuum chamber from a connecting pipe of the vacuum chamber; 3) conveying driving gas by an ascending pipe in the connecting pipe, so that the molten copper matte flows in a circulating manner between the copper matte tank and the vacuum chamber through the ascending pipe and a descending pipe of the connecting pipe; 4) closing the vacuum pipe, and stopping feeding the driving gas. The smelting method can be used for treating copper concentrate with high impurity content to produce crude copper of which the impurity content meets requirements, and facilitates the refining and electrolytic refining of the crude copper. The invention further discloses a copper concentrate smelting device which comprises a smelting furnace, a converting furnace and a purifying device used for carrying out the copper matte impurity-removing. The smelting device can be used for treating copper concentrate with high impurity content to produce crude copper meeting requirements.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and more specifically, relates to a copper concentrate smelting method and a copper concentrate smelting device. Background technique [0002] In copper pyrometallurgy, there are two steps to produce blister copper from sulfide copper concentrate, that is, first desulfurize and remove iron from sulfide copper concentrate to obtain matte, and then further desulfurize and remove iron to obtain matte. Blister copper, wherein the device for performing the second step of desulphurization and iron removal is a converting furnace. In copper metallurgical production, the blister copper produced by smelting copper concentrate can be obtained after blister copper refining and electrolytic refining. Among them, the smelting production method of copper concentrate includes smelting capable of desulfurization and iron removal and blowing capable of desulfurization and iron removal. Smelting and blowing ar...

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Problems solved by technology

The impurity content in the high-impurity copper concentrate is high, and the impurity content in the blister copper obtained after smelting capable of desulfurization and iron removal and blowing capable of desulfurization and iron removal is too high, and blister copper refining is mainly to remove sulfur in blister copper , the refining of blister copper has limited ability to remove impurities such as lead, zinc, arsenic, antimony, bismuth, etc., resulting in the transfer of impurities such as lead, zinc, arsenic, antimony, bismuth in blister copper into anode copper, and anode copper with high impurity content As a result, problems such as high cell voltage, large-area passivation of the anode, excessive floating anode slime in the electrolyte, and long particles on the cathode copper plate in the subsequent electrolytic refining are not conducive to the smooth progress of electrolytic refining.

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