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Method for recovering cobalt from nickel-based high-temperature alloy cutting waste material

A nickel-based superalloy and scrap technology, applied in the field of cobalt recovery, can solve the problems of difficult large-scale production, high melting point, high energy consumption, etc., and achieve the effect of saving energy consumption, low investment cost and high recovery rate

Inactive Publication Date: 2019-06-21
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the current technology are: 1. The melting point of superalloys is very high at present, and it usually needs to be heated to extremely high temperatures to melt them. Therefore, it takes a lot of energy to melt a large amount of waste materials; 2. Basically, they are made of cobalt Cobalt is recovered in the form of salt, but pure metal cobalt has not been obtained; 3. The recovery process is relatively cumbersome, and it is difficult to produce on a large scale

Method used

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  • Method for recovering cobalt from nickel-based high-temperature alloy cutting waste material
  • Method for recovering cobalt from nickel-based high-temperature alloy cutting waste material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The mass fraction of cobalt in the nickel-base superalloy cutting scrap used in this example is 10%.

[0029] (1) breaking nickel-based high-temperature alloy cutting waste into small particles, and the particle size of the alloy particles is 0.1-5mm;

[0030] (2) Place the small alloy particles described in step (1) in the mixed acid of hydrochloric acid and nitric acid for leaching treatment, obtain leachate and leach slag after solid-liquid separation; described hydrochloric acid concentration is 5mol / L, the concentration of nitric acid is 2.5mol / L, the volume of the inorganic acid V=9m, where m is the mass of the alloy powder in g, and the unit of V is mL; the temperature of the leaching treatment is 75°C, and the time of the leaching treatment for 2h;

[0031] (3) Use the alkali solution as a precipitating agent to slowly adjust the pH of the system until the pH value of the reaction system is 5.0, and then perform solid-liquid separation; the temperature of the p...

Embodiment 2

[0036] The mass fraction of cobalt in the nickel-based superalloy cutting scrap used in this example is 12%.

[0037] (1) breaking nickel-based high-temperature alloy cutting waste into small particles, and the particle size of the alloy particles is 0.1-5mm;

[0038] (2) Place the small alloy particles described in step (1) in the mixed acid of hydrochloric acid and nitric acid for leaching treatment, obtain leachate and leach slag after solid-liquid separation; described hydrochloric acid concentration is 6mol / L, the concentration of nitric acid is 2.5mol / L, the volume of the inorganic acid V=8m, where m is the mass of the alloy powder in g, and the unit of V is mL; the temperature of the leaching treatment is 80°C, and the time of the leaching treatment for 2h;

[0039] (3) Use the alkali solution as a precipitating agent to slowly adjust the pH of the system until the pH value of the reaction system is 5.0, and then carry out solid-liquid separation; the temperature of th...

Embodiment 3

[0044] The mass fraction of cobalt in the nickel-based superalloy cutting waste used in this example is 15%.

[0045] (1) breaking nickel-based high-temperature alloy cutting waste into small particles, and the particle size of the alloy particles is 0.1-5mm;

[0046] (2) Place the small alloy particles described in step (1) in the mixed acid of hydrochloric acid and nitric acid for leaching treatment, obtain leachate and leach slag after solid-liquid separation; described hydrochloric acid concentration is 6mol / L, the concentration of nitric acid is 3mol / L, the volume of the inorganic acid V=9m, wherein m is the quality of the alloy powder, the unit is g, and the unit of V is mL; the temperature of the leaching treatment is 80°C, and the time of the leaching treatment is 2h;

[0047](3) Use the alkali solution as a precipitating agent to slowly adjust the pH of the system until the pH value of the reaction system is 5.0, and then carry out solid-liquid separation; the temper...

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Abstract

The invention provides a method for recovering metal cobalt from a nickel-based high-temperature alloy cutting waste material. The method specifically comprises the following steps of (1) carrying outmechanical crushing on the nickel-based high-temperature alloy cutting waste material to obtain alloy waste material particles with small particle size; (2) carrying out oxidation acid leaching treatment on the alloy particles, adjusting the pH value of the leachate, and precipitating to remove impurities in the solution; (4) extracting and separating the leachate to obtain a cobalt-rich extracting solution; (5) carrying out reverse extraction on the cobalt-rich extracting solution to obtain a cobalt-rich reverse extracting solution; and (6) performing electrolytic deposition treatment on thecobalt-rich back extracting solution, and recovering to obtain high-purity cobalt. The method has the advantages that the leaching rate of metal cobalt is high, the recovery rate is high, and the nickel-based high-temperature alloy composed of various components can be treated, the recovery process is simple, and the method is a low-cost, efficient and environment-friendly method for recovering and preparing the metal cobalt from the nickel-based high-temperature alloy cutting waste material.

Description

technical field [0001] The invention relates to a method for recovering cobalt from nickel-based superalloy cutting waste, belonging to the technical field of hydrometallurgy. Background technique [0002] As a group VIII metal element, cobalt has good physical, chemical and mechanical processing properties. It can be used to make magnetic materials or make alloys with various metals. It is widely used in aerospace, mechanical processing, chemical industry, and electronic industry. As well as medical and health fields, cobalt is also a very important strategic resource. In the field of aerospace, cobalt-based alloys are widely used as production materials for heat-resistant parts because of their superior corrosion resistance and thermal shock resistance than other alloys. Cobalt-based alloys have outstanding performance at high temperatures. When the alloy temperature reaches above 1000°C, it can form carbides that are relatively refractory and difficult to transform into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B7/00
CPCY02P10/20
Inventor 邢鹏飞王勃高帅波都兴红王晓峰
Owner NORTHEASTERN UNIV LIAONING
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