Process for preparing high-purity superfine cobalt powder from copper-cobalt-iron alloy

Abstract

The invention discloses process for preparing high-purity superfine cobalt powder from copper-cobalt-iron alloy, which is characterized in that the process comprises the following steps: (1) pulverizing the copper-cobalt-iron alloy into alloy powders; (2) pressurizing the alloy powders with inorganic acid for leaching; (3) adjusting the pH value with carbonate to extract impurities to remove ironand fluoride purified calcium and magnesium; (4) extracting, deeply purifying and cleaning to remove copper, manganese and zinc, to separate cobalt from nickel, and to return cobalt to the extractingsolution to precipitate cobalt for preparation of cobalt carbonate; (5) calcining high-purity cobalt carbonate at a high temperature to produce cobalt oxide; and (6) reducing cobalt oxide with hydrogen to high-purity superfine cobalt powders. The beneficial effects of the process disclosed by the invention are as follows: the process is simple and easy to operate, the cost is low, the technical conditions are easy to control, the cobalt loss is small and the leaching rate is high. After several times of purification, the impurities can be completely removed to obtain high-purity superfine cobalt powders.

Description

technical field [0001] The invention belongs to a wet processing method for copper-cobalt-iron alloy materials, and in particular relates to a process for preparing high-purity ultrafine cobalt powder from copper-cobalt-iron alloy Background technique [0002] Single cobalt ore is very rare in my country, and cobalt products are generally attached to other minerals, such as nickel ore and other mineral materials. Cobalt generally appears as a by-product during copper-nickel fire smelting, its output is small and its cost is high, so my country imports a considerable amount of cobalt products from overseas every year. In order to solve the contradiction between supply and demand with large demand and low output, on the one hand, fully explore cobalt ore resources and improve cobalt smelting technology; on the other hand, make full use of cobalt secondary resources. [0003] The secondary recovery of cobalt mainly focuses on cobalt alloys, cobalt-containing battery materials ...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the cobalt powder obtained is potato-like, and particle size is relatively large; When the body is heated to a certain temperature, in most cases it can reach the boiling point of the liquid phase, these initial compounds are reduced to obtain metal fine cobalt powder

Its disadvantage is that the production of products is unstable and it is not easy to realize industrial production

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