A method for recovering valuable metals from an alloy containing iron, cobalt and copper

Abstract

The invention discloses a method for recovering valuable metals from an alloy containing iron, cobalt and copper, which comprises the following steps: (1) combining one or more of matte, copper-nickel matte and miscellaneous copper with Fe-cobalt-copper alloy is added into the converter; (2) Control the smelting temperature in the converter to be 1100°C-1350°C, and blow oxygen-containing gas into the converter to make the materials in the converter react under the oxidizing atmosphere, and produce crude Copper, cobalt-containing slag and flue gas; (3) separate blister copper and cobalt-containing slag, and recover cobalt from cobalt-containing slag. The method of the present invention effectively reduces the smelting temperature required for smelting the alloy of iron-cobalt-copper alone by melting the alloy containing iron-cobalt-copper with a high melting point and the matte / copper-nickel matte with a low melting point. The advantages of energy consumption are very prominent, and the requirements for refractory materials are reduced, the economic benefits of the process are improved, the amount of slagging agent is small, and it is more economical and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of nonferrous heavy metal metallurgy, in particular to a method for recovering valuable metals from an alloy containing iron, cobalt and copper. Background technique [0002] Cobalt is a typical alloying element. Therefore, many intermediate products in the smelting and processing of cobalt resources are in the form of alloy products, such as iron-cobalt-copper alloys, waste lithium-ion batteries / ocean polymetallic nodule reduction smelting alloys. The above-mentioned alloys all use Fe, Co, and Cu as the main constituent elements, and are important raw materials for further extraction of copper and cobalt. However, because of the differences in their smelting raw materials / methods, there are large differences in the composition and properties of the alloys, and there are many types of further extraction techniques, specifically: [0003] (1) Copper-cobalt white alloy [0004] Copper-cobalt white alloy, also known as...

AI Technical Summary

Problems solved by technology

However, the above-mentioned process still has the following obvious deficiencies: (1) direct melting of copper-cobalt alloy, waste lithium-ion battery / ocean polymetallic nodule reduction smelting alloy, because the melting point of the alloy is very high (≥1400 ° C), the smelting operation temperature is very high, the process High energy consumption, high requirements for refractory materials, and high production costs; (2) It is necessary to add a large amount of slagging agents (such as manganese oxide ore, cobalt oxide, magnesium oxide, SiO 2 etc.), resulting in a large output of smelting waste residue and poor environmental benefits