Recycling method of valuable metal from copper-cobalt white alloy

Abstract

The invention discloses a recycling method of valuable metal from copper-cobalt white alloy, comprising the following steps: (1) adding one or several of matte, copper-nickel matte and scrap copper into a converter together with copper-cobalt white alloy; (2) controlling smelting temperature in the converter to be 1150-1400 DEG C, and blowing oxygen-containing gas into the converter, so that material in the converter reacts in an oxidizing atmosphere, to produce crude copper, cobalt-containing slag and flue gas; (3) separating the crude copper from the cobalt-containing slag, and recycling cobalt from the cobalt-containing slag. According to the method disclosed by the invention, by mixing and smelting the copper-cobalt white alloy with high melting point with matte / copper-nickel matte / scrap copper with low melting point, smelting temperature needed for independently smelting iron-cobalt-copper alloy is effective lowered, the energy consumption advantage of the process is prominent, the requirement of the refractory material is reduced, the process economic benefit is increased, the use amount of a slag forming constituent is small, and the method is relatively economical and environment-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 in copper-cobalt white alloys. Background technique [0002] Copper-cobalt white alloy, also known as white alloy or cobalt white alloy, refers to the alloy of Co, Cu, Fe and other metals. It is generally obtained by reducing smelting with blast furnace or electric furnace using hydrocobalt ore, copper-cobalt ore, etc. as raw materials. White alloy generally contains Cu 10-40%, Co 10-40%, Fe 20-60%. In addition to Cu, Co, and Fe, it also contains a certain amount of Si and other impurities, and the Si content can reach up to 15%. Due to the presence of Si in the alloy, the corrosion resistance of white alloys is significantly enhanced, especially for high-silicon white alloys. It is extremely difficult to recover valuable metals through further leaching. [0003] At present, the conventional treatment method of white alloy...

AI Technical Summary

Problems solved by technology

However, the following obvious deficiencies still exist at present: (1) direct melting of cobalt white alloy, because the melting point of cobalt white alloy is very high (≥1500°C), the smelting operation temperature is very high, the energy consumption of the process is high, and the requirements for refractory materials are high, High production cost; (2) It is necessary to add a large amount of slagging agents (such as manganese oxide ore, cobalt oxide, magnesium oxide, etc.), which makes the output of smelting waste slag large and the environmental benefits are not good