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CN-121992191-A - Method for extracting high-purity metal from nickel-based superalloy return material

CN121992191ACN 121992191 ACN121992191 ACN 121992191ACN-121992191-A

Abstract

The invention provides a method for extracting high-purity metal from a nickel-based superalloy return material, belonging to the technical field of nonferrous metal metallurgy. The invention provides a method for extracting high-purity metal from a nickel-based superalloy return material, which comprises the following steps of carrying out chlorination reaction on the nickel-based superalloy return material to obtain mixed chloride, separating the mixed chloride to obtain single chloride, mixing the single chloride with pure water to obtain a chloride aqueous solution, and carrying out electrodeposition on the chloride aqueous solution to obtain a metal simple substance. The invention separates and prepares the chloride aqueous solution through chlorination reaction and performs separation and impurity removal through electrodeposition, thereby obtaining high-purity metal, shortening the process flow and improving the recovery rate.

Inventors

  • YU JIANBO

Assignees

  • 安徽沣铼科技有限公司

Dates

Publication Date
20260508
Application Date
20260209

Claims (10)

  1. 1. A method for extracting high purity metal from nickel-based superalloy returns, comprising the steps of: (1) Carrying out chlorination reaction on the nickel-based superalloy return material to obtain mixed chloride; (2) Separating the mixed chloride obtained in the step (1) to obtain a single chloride; (3) Mixing the single chloride obtained in the step (2) with pure water to obtain a chloride aqueous solution; (4) And (3) electrodepositing the chloride aqueous solution obtained in the step (3) to obtain a metal simple substance.
  2. 2. The method of claim 1, wherein the nickel-base superalloy return in step (1) has a particle size of 150 μm or less.
  3. 3. The method of claim 1, wherein the chlorinating reagent used in the chlorinating reaction in step (1) is Cl 2 .
  4. 4. The method according to claim 1, wherein the temperature of the chlorination reaction in the step (1) is 150-200 ℃, and the time of the chlorination reaction is 3-10 hours.
  5. 5. The method of claim 1, wherein the separation in the step (2) is volatilization separation, the volatilization separation time is 3-5 hours, and a tube furnace used for the volatilization separation is provided with 3-6 adjustable temperature control areas.
  6. 6. The method of claim 5, wherein the tube furnace is provided with 4 adjustable temperature controlled zones having temperatures of 1300-1400 ℃, 1150-1250 ℃, 950-1050 ℃ and 850-950 ℃, respectively.
  7. 7. The method according to claim 1, wherein the concentration of the metal element in the aqueous chloride solution in step (3) is >30g/L.
  8. 8. The method according to claim 1, wherein the electrodeposition in step (4) is constant voltage electrodeposition.
  9. 9. The method according to claim 1, wherein the process parameters of the electrodeposition in the step (4) are that the temperature of the electrolytic bath is more than 40 ℃, the current density is 100-200A/m 2 , the polar distance is 10-15 cm, the pH value is 3.0-5.0, and the electrodeposition time is more than or equal to 12 hours.
  10. 10. The method of claim 1, wherein the electrodeposited anode in step (4) is a ruthenium iridium coated titanium plate.

Description

Method for extracting high-purity metal from nickel-based superalloy return material Technical Field The invention belongs to the technical field of nonferrous metal metallurgy, and particularly relates to a method for extracting high-purity metal from a nickel-based superalloy return material. Background Nickel-based superalloys are widely used in the aerospace, nuclear and petroleum industries for their excellent properties, including high creep strength, fracture strength, good corrosion resistance, fatigue resistance, and high temperature oxidation resistance. However, in superalloy production, the yield of acceptable product is only 10% and a large amount of scrap superalloy (i.e., nickel-based superalloy return) is produced. The recovery value of valuable metals such as nickel and cobalt in these waste superalloys is high, and it is necessary to recover and use the valuable metals from the viewpoints of resource utilization and environmental protection. Currently, the process of extracting metals from nickel-base superalloy returns can be broadly divided into pyrometallurgy and hydrometallurgy. Because the nickel-based superalloy has high melting point, the element purity and the yield are low by adopting the traditional fire method or wet method. How to improve the process to increase the purity and recovery of metals is a technical challenge in the art. Disclosure of Invention The invention aims to provide a method for extracting high-purity metal from a nickel-based superalloy return material. The method provided by the invention can obtain high-purity metal and has high recovery rate. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a method for extracting high-purity metal from a nickel-based superalloy return material, which comprises the following steps: (1) Carrying out chlorination reaction on the nickel-based superalloy return material to obtain mixed chloride; (2) Separating the mixed chloride obtained in the step (1) to obtain a single chloride; (3) Mixing the single chloride obtained in the step (2) with pure water to obtain a chloride aqueous solution; (4) And (3) electrodepositing the chloride aqueous solution obtained in the step (3) to obtain a metal simple substance. Preferably, the granularity of the nickel-based superalloy return material in the step (1) is less than or equal to 150 mu m. Preferably, the chlorinating reagent used in the chlorinating reaction in step (1) is Cl 2. Preferably, the temperature of the chlorination reaction in the step (1) is 150-200 ℃, and the time of the chlorination reaction is 3-10 hours. Preferably, the separation in the step (2) is volatilization separation, the time of the volatilization separation is 3-5 hours, and 3-6 adjustable temperature control areas are arranged in a tube furnace used for the volatilization separation. Preferably, the tube furnace is provided with 4 adjustable temperature control areas, and the temperatures of the adjustable temperature control areas are 1300-1400 ℃, 1150-1250 ℃, 950-1050 ℃ and 850-950 ℃ respectively. Preferably, the concentration of the metal element in the aqueous chloride solution in step (3) is >30g/L. Preferably, the electrodeposition in the step (4) is constant voltage electrodeposition. Preferably, the technological parameters of the electro-deposition in the step (4) are that the temperature of an electrolytic tank is more than 40 ℃, the current density is 100-200A/m 2, the polar distance is 10-15 cm, the pH value is 3.0-5.0, and the electro-deposition time is more than or equal to 12 hours. Preferably, the electrodeposited anode in the step (4) is a titanium plate plated with a ruthenium iridium coating. The invention provides a method for extracting high-purity metal from a nickel-based superalloy return material, which comprises the following steps of carrying out chlorination reaction on the nickel-based superalloy return material to obtain mixed chloride, separating the mixed chloride to obtain single chloride, mixing the single chloride with pure water to obtain a chloride aqueous solution, and carrying out electrodeposition on the chloride aqueous solution to obtain a metal simple substance. The invention separates and prepares the chloride aqueous solution through chlorination reaction and performs separation and impurity removal through electrodeposition, thereby obtaining high-purity metal, shortening the process flow and improving the recovery rate. The results of the examples show that the purity of Ni metal obtained by the method provided by the invention is 99.992-99.994%, the purity of Co metal is 99.991-99.992%, the purity of Al metal is 99.991-99.994%, the purity of Cr metal is 99.992-99.995%, the recovery rate of Ni is 92-95%, the recovery rate of Co is 93-98%, the recovery rate of Al is 89-92%, and the recovery rate of Cr is 91-92%. Drawings FIG. 1 is a flow chart of a process for extracting high purity