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Method for recovering cobalt and nickel from waste iron nickel cobalt alloy

An iron-nickel-cobalt alloy and metal technology, applied in the field of waste iron-nickel-cobalt alloy recycling, can solve problems such as cumbersome operations, and achieve the effect of streamlining processes and saving energy consumption

Active Publication Date: 2013-02-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although extraction can often achieve a good separation effect, the extraction operation involves a variety of organic reagents and the operation is cumbersome. If the conventional precipitation method can be used to achieve iron removal and separation of cobalt and nickel, the process flow can be simplified, production costs can be reduced, and energy can be saved. consumption, increase production efficiency, and reduce environmental load

Method used

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  • Method for recovering cobalt and nickel from waste iron nickel cobalt alloy
  • Method for recovering cobalt and nickel from waste iron nickel cobalt alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. According to figure 1 According to the process, take 5kg waste iron-nickel-cobalt alloy and put it into the leaching tank ① ( figure 2 shown), then add 50L of 2.5mol / L sulfuric acid to control the temperature at 65°C and stir for leaching, and add 2.5L of 30% hydrogen peroxide at the same time for leaching, and the leaching time is 4h.

[0026] 2. Put the waste iron-nickel-cobalt alloy leaching solution into the reaction tank ②, add 0.5L ammonia water and appropriate amount of NaOH, adjust the pH to 3, stir and react at room temperature for 1 hour, and obtain a solid-liquid mixture. The solid-liquid mixture is introduced into the filtration device ③ for filtration and separation, the obtained iron precipitate is discarded, and the filtrate is transferred to the reaction tank ④.

[0027] 3. Add 720g Na to the reaction tank ④ 2 CO 3 and 1.5 L of ammonia water, adjusted to pH = 10, and stirred at room temperature for 1 h to obtain a solid-liquid mixture. The solid-...

Embodiment 2

[0031] 1. According to figure 1 According to the process, take 5kg waste iron-nickel-cobalt alloy and put it into the leaching tank ① ( figure 2 shown), and then add 70L of 2.5mol / L sulfuric acid to control the temperature at 75°C and stir for leaching. At the same time, add 3.5L of 30% hydrogen peroxide, and the leaching time is 3h.

[0032] 2. Put the waste iron-nickel-cobalt alloy leaching solution into the reaction tank ②, add 0.5L ammonia water and appropriate amount of NaOH, adjust the pH to 3.5, stir and react at room temperature for 2 hours, and obtain a solid-liquid mixture. The solid-liquid mixture is introduced into the filtration device ③ for filtration and separation, the obtained iron precipitate is discarded, and the filtrate is transferred to the reaction tank ④.

[0033] 3. Add 1kg Na to the reaction tank ④ 2 CO 3 and 3.5 L of ammonia water, adjusted to pH = 11, and stirred at room temperature for 2 h to obtain a solid-liquid mixture. The solid-liquid mix...

Embodiment 3

[0037] 1. Take 5.5kg waste iron-nickel-cobalt alloy and put it into the leaching tank ① ( figure 2 shown), then add 100L of 2.5mol / L sulfuric acid to control the temperature at 85°C and stir for leaching, and add 5L of 30% hydrogen peroxide at the same time for leaching, and the leaching time is 2h.

[0038] 2. Put the waste iron-nickel-cobalt alloy leaching solution into the reaction tank ②, add an appropriate amount of NaOH, adjust the pH to 4, stir and react at room temperature for 3 hours, and obtain a solid-liquid mixture. The solid-liquid mixture is introduced into the filtration device ③ for filtration and separation, the obtained iron precipitate is discarded, and the filtrate is transferred to the reaction tank ④.

[0039] 3. Add 1.44kg Na to the reaction tank ④ 2 CO 3 And 6L Ethylenediamine C 2 N 2 h 8, adjust the pH=9, and stir the reaction at room temperature for 3h to obtain a solid-liquid mixture. The solid-liquid mixture is introduced into the filter devi...

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Abstract

The invention discloses a method for separating and recovering cobalt and nickel from waste iron nickel cobalt alloy, and belongs to the technical field of nonferrous metallurgy. The method comprises the steps as follows: 1) leaching the waste iron nickel cobalt alloy with 54% of Fe, 18% of Co and 28% of Ni through acidity of sulfuric acid to obtain a leaching solution with main metal of iron, nickel and cobalt; 2) forming a 'compounding agent-precipitating agent' system by utilizing one or more of the compounding agents of OH<->, NH3 and C2N2H8 and the precipitating agent of CO32, acting on the nickel-cobalt-iron leaching solution, and separating the iron and the cobalt through fractional precipitation to obtain a cobalt compound; and 3) compounding the nickel in the solution, and further electrolyzing to obtain the nickel. The method has the benefits as follows: the cobalt and the nickel in the solution of the waste iron nickel cobalt alloy are recovered through integration of the 'compounding agent-precipitating agent' system and the process steps, the cobalt in the leaching solution is separated from the compound nickel in the form of a precipitate, the nickel compound solution is electrolyzed to recover the nickel, and the 'compounding agent-precipitating agent' barren solution can be recycled. The method makes full use of secondary resources, and is simple in process and easy for continuous and automatic production.

Description

Technical field: [0001] The invention relates to a method for recycling waste iron-nickel-cobalt alloys, in particular to a method for recovering cobalt and nickel from waste cobalt-nickel-iron alloys by utilizing a "coordination-precipitation" system. Background technique: [0002] Cobalt and nickel are precious non-ferrous metals, which are widely used in high-tech fields such as national defense, aerospace, atomic energy, chemical industry, and electronics. In addition to primary minerals, cobalt-nickel raw materials also include a large amount of waste iron-nickel-cobalt alloys, such as scrapped machines, used batteries, spent catalysts, spent functional alloys, smelting waste residues, etc. The waste iron-nickel-cobalt alloy contains a large amount of valuable metals nickel and cobalt, and its treatment and recovery is conducive to the recycling of resources and is of great significance to the sustainable development of society. [0003] The main sources of waste iron-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/08C22B3/44C25C1/08C22B23/00
CPCY02P10/20
Inventor 聂祚仁席晓丽马立文
Owner BEIJING UNIV OF TECH
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