Method for treating nickel-cobalt alloy waste

A nickel-cobalt alloy and waste technology, which is applied in the field of direct treatment of nickel-cobalt alloy waste by swirl electrolytic leaching, can solve the problems of not using swirl electrolysis, etc., and achieve the effects of improving metal recovery rate, fully utilizing resources, and efficient treatment

Active Publication Date: 2017-06-27
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

However, its research and application are mainly concentrated in the purification stage, that is, metal ions are deposited by the reduction of the cathode in the electrolysis process to achieve purification and purification. However, there is still no research case for the strong oxidation of the anode at this stage.
Moreover, in the treatment of nickel-cobalt alloy waste slurry, there is still no precedent for using swirl electrolysis

Method used

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  • Method for treating nickel-cobalt alloy waste

Examples

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Effect test

Embodiment 1

[0025] The experimental raw material in this example is nickel-based alloy scrap, the main chemical composition (%): Ni 63.61, Co 8.53, W7.11, Mo 5.10, Al 1.15, Cr 2.21, Ta 6.38, Nb 0.50. Has a high recycling value.

[0026] The method for processing nickel-cobalt alloy waste of the present embodiment may further comprise the steps:

[0027] (1) Grinding the nickel-cobalt alloy waste material and passing it through a 200-mesh sieve; mixing evenly the dilute sulfuric acid solution and the nickel-cobalt alloy waste material according to the liquid-solid volume mass ratio of 8 ml:1g to obtain a slurry;

[0028] Described dilute sulfuric acid concentration is 200g / L;

[0029] (2) Put the slurry in the slurry tank, and the slurry enters the swirl electrolysis system through the pneumatic pump (the feeding speed of the slurry is 0.3L / min) for swirl electrolysis. The conditions for swirl electrolysis are: temperature 75°C, the cathode current density is 150A / m 2 . After electroly...

Embodiment 2

[0032] The experimental raw material in this example is nickel-based alloy scrap, the main chemical composition (%): Ni 63.61, Co 8.53, W7.11, Mo 5.10, Al 1.15, Cr 2.21, Ta 6.38, Nb 0.50. Has a high recycling value.

[0033] The swirl electrolytic leaching method of the present embodiment directly processes the nickel-cobalt alloy fertilizer, comprising the following steps:

[0034] (1) Grind the nickel-cobalt alloy waste material and pass it through a 200-mesh sieve; mix the dilute sulfuric acid solution and the nickel-cobalt alloy waste material according to the liquid-solid volume mass ratio of 10 ml:1g to obtain a slurry;

[0035] Described dilute sulfuric acid concentration is 180g / L;

[0036] (2) Put the slurry in the slurry tank, and the slurry enters the swirl electrolysis system through a pneumatic pump (the feeding speed of the slurry is 0.5L / min) for swirl electrolysis. The conditions for swirl electrolysis are: temperature 85°C, the cathode current density is 160...

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Abstract

The invention discloses a method for treating nickel-cobalt alloy waste. The dilute sulfuric acid system nickel-cobalt alloy waste is put into a sizing groove, a mechanical stirring paddle is arranged in the sizing groove, and therefore sizing is maintained in an evenly-mixed state; and the sizing enters a rotary flow electrolyzing system through a pneumatic pump according to the certain speed, is electrolyzed and then discharged from an electrolyzing device and enters the sizing groove continuously, circulation is conducted in this way, and nickel and cobalt in minerals are extracted efficiently after certain time. The technology conditions include that the concentration of dilute sulfuric acid in the sizing ranges from 180 g / L to 200 g / L, the temperature ranges from 55 DEG C to 85 DEG C, the liquid-solid ratio ranges from 6-12:1, and the cathode current density ranges from 100 A / m<2> to 200 A / m<2>. The method is short in process, high in reaction speed, and even in mass transfer in the reaction process. Compared with a traditional acid wet process technology, the acidity is low, no extra oxidizing agent needs to be added, the nickel and the cobalt in the alloy waste can be comprehensively and efficiently extracted, and the resource utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal hydrometallurgy, in particular to a method for directly treating nickel-cobalt alloy waste by swirl electrolytic leaching. Background technique [0002] Nickel and cobalt are widely used as alloying elements, and are used in the production of stainless steel, superalloys, magnetic materials and catalysts, respectively. Nowadays, the demand for nickel and cobalt in modern industry is constantly increasing, but nickel and diamond mineral resources are becoming increasingly scarce. Therefore, it is of great significance to comprehensively develop and utilize various secondary resources containing nickel and cobalt. [0003] Superalloy scrap contains a large amount of nickel, cobalt and rare elements such as rhenium and tungsten. Foreign superalloy factories can realize the recycling of waste superalloys by virtue of their advanced regeneration technology, while domestic ones can only downgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B23/00
CPCC22B3/045C22B23/0407Y02P10/20
Inventor 田庆华辛云涛郭学益王浩
Owner CENT SOUTH UNIV
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